Metallic stearate and stearic use production methods

Stearate, stearic acid, the scientific name, also known as stearic acid, white or creamy-white powder or crystalline lumps, which has a cross-section of microstrip shiny fine needle-like crystals; similar  WSD Aluminum hydroxide grease micro odorless, tasteless .
The main industrial oils produced by hydrolysis. After the current domestic sources of stearic basically been to import palm oil by catalytic hydrogenation, hydrolysis during high pressure, fatty acids off the light, and then vacuum distillation system.
Mainly for the production of stearic acid salts, for example: calcium stearate, lead stearate, magnesium stearate, iron base.
  The company set the development, production, sales WSD Plastic impact modifier  and service PVC composite stabilizer, stearic acid salts as a whole, the main products are calcium stearate, aluminum stearate, zinc stearate, potassium stearate, stearic acid lead, ammonium stearate, sodium stearate, magnesium stearate, cadmium stearate, barium stearate, iron stearate product.

Action of heat stabilizers and PVC flame retardant rubber compound of the conveyor belt

 Heat stabilizer is an important class of plastics processing aids , the birth and development of the PVC resin, heat stabilizer synchronization processing is mainly used for PVC resin , heat stabilizer and  WSD Chrolinated polyethylene so PVC resin , the ratio of hard and soft PVC products are a close relationship.
Also known as flame retardant agents, flame retardants or flame retardants : flammable polymer flame resistance conferred functional additives ; By Application divided into additive flame retardant and reactive flame retardant . According to the composition , including adding an WSD chromium oxide  inorganic flame retardant , halogen -based flame retardant ( organic bromides and organic chlorides ) , phosphorus-based flame retardants ( red phosphorus, phosphate esters , and halogenated phosphates , etc.) and nitrogen flame retardants .

Thermal stabilizers in PVC conveyor gum base resin is mainly used to improve the thermal stability of PVC resin in the processing and use , to extend the service life of the article . Such additives include tribasic lead sulfate , barium cadmium zinc liquid stabilizer . The flame retardant effect of the polymer material in the ignition of the flame spread rapidly Buzhi Yu , suppressing flames and heat from the WSD stearic acid  air. Such as antimony trioxide , zinc borate , aluminum hydroxide and the like. Both formulations have a different action can be selected according to the rubber compound formulation conveyor specific purposes.

Application of the principles of heat stabilizer for shoes and some of the main content

The main stabilizer mixture according to tin, lead and the metal of group A, such as blood, barium, copper, zinc classification. Tin stabilizers: 1 or 2 comprising a tin-carbon bond, oxygen or sulfur as  WSD one pack stabilizer the remaining valence bond - tin bond unsaturated anionic tetravalent tin compounds are the most effective stabilizers for PVC. These organic tin compounds are tin oxide or an organic product with the appropriate acid chloride or ester reactions. Synergistic stabilizer mixture are common, typically include various organotin compounds and stream-based wavelet salt (compound) and the auxiliary additives, such as zinc soaps, phosphites, epoxides, esters, ultraviolet absorber, antioxidant agent. Obviously, most of the synergistic composition has a special, and therefore they have not yet WSD PVC lubricants  found fully common. Organotin stabilizers are divided into two types of sulfur and sulfur-free. Sulfur-containing stabilizers are all stable, excellent performance, but the presence of sulfur compounds similar to the taste and cross contamination problems station. Lead salt stabilizer compound, lead oxide content greater than 50%, compared with the conventional stabilizing agents, can reduce the amount of 10% to 30%, with a high efficiency and stability, and without grinding, directly into a kneading pot used for cable material, not only excellent in dispersibility, but also to maintain good  WSD zinc stearate electrical and mechanical properties of PVC. The organic / inorganic composite heat stabilizer S Series microcrystalline tribasic lead sulfate, the product of the reaction crystallization process, the original long needle becomes microcrystalline, thus greatly improving stabilizers in PVC resin dispersion and thermal stability. Low lead compound stabilizer KD series, with outstanding thermal stability

By type and mechanism of PVC heat stabilizers brief

 Type of plastic heat stabilizer is a kind of heat stabilizers can prevent or reduce the polymer is heated in the course of processing and degradation or cross-linking additives to extend the life of the composite material. Usual stabilizers can be divided into categories according to the main component of salt, fatty acid soaps, organotin compounds, heat stabilizers, and the pure compound classes of organic compounds.
   Heat stabilizers salt: salt stabilizer is the combination of the "base" of lead salts of inorganic  acrylic processing and organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost, transparent poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. Fatty acid based heat stabilizer: Such a thermal stabilizer is a compound consisting of a fatty acid with magnesium hydroxide  a metal ion root, also known as hot metal soap stabilizers, its performance and the kind of metal ions and acid radicals, generally in an amount of 0.1% to 3.0 %.
 Composite heat stabilizer: Such a thermal stabilizer is a metal salt or soap as a kind of liquid or solid based and organic tin compound-based compound, wherein the metal salts are calcium - magnesium - zinc, barium - calcium - zinc, barium - zinc and barium - cadmium; common organic acids such as organic acids, naphthenic acid, oleic acid, benzoic acid and salicylic acid.
  Organic heat stabilizers: Except for a few of such primary heat stabilizer stabilizer may be used alone (primarily nitrogen containing organic compound), but also a high boiling point include polyhydric alcohols and phosphites, phosphates and metal stabilizers often and with agents that can improve weather resistance, transparency of the composite material, to improve the surface color of the article. Mechanism of pvc heat stabilizers and absorption HCL, inhibit autocatalysis. Such stabilizers include lead salts, organic acid metal soaps, organic tin compounds, epoxy compounds, phenol salts and metal thiolate. They can react with HCL, HCL off PVC suppression response. PVC substitution labile allylic chlorine in the molecule atom suppression de PVC. Organotin stabilizers such as ligand binding molecules and instability occurs PVC chlorine atom, a ligand, a chlorine atom with an unstable organotin substitution. An addition reaction with the polyene structure, the formation of large conjugated system damage and reduce coloration. Unsaturated acid salts or esters containing double bonds, and the PVC molecules conjugated diene double bond addition reaction, thereby destroying the structure of the conjugate, inhibiting discoloration.
Capturing free radicals and prevent the oxidation reaction. As the phenolic heat stabilizer can be added to titanium dioxide  block off the HCL, because phenol can be given by H atoms and radical degradation of PVC macromolecular radical coupling, not react with O2 forming material, and a heat stabilizing effect. Such a thermal stabilizer, one or both may have several roles. Ideal for PVC heat stabilizers should be a versatile substance, or a mixture of some of the material, they are able to perform the following functions: First, replacement lively, unstable substituents; second is to absorb and neutralize the release of PVC processing HCL, eliminating autocatalytic degradation of HCL; Third neutralize or inactivate catalytic degradation of metal ions and other harmful impurities; Fourth, through various forms of chemical reactions can be blocked unsaturated bond continues to grow, inhibiting degradation coloring; five is the best shield against ultraviolet protective effect. Generally, heat stabilizers according to their performance with the use of special, very little is used alone, but most of the species in a powder form, some of which are highly toxic chemicals. For ease of use, to prevent dust poisoning, reduce toxic substances or substitute non-toxic substances, at home and abroad in recent years developed a wide variety of composite stabilizer, for example, the world famous German brand composite stabilizer Bear series, the United States, Germany, Japan, Netherlands and other countries, or organotin compound organotin stabilizers have a considerable market in China. Therefore, the development of China's efforts to promote the use of high efficiency, low cost, no dust pollution and toxic or low toxicity of new composite stabilizer is an urgent need for the development of China's plastics industry.

PVC heat stabilizers environmental protection is imperative

PVC heat stabilizers environmental protection is imperative, zinc-based, non-toxic and organic compounds based heat stabilizer is the main direction of development, but the zinc-based nontoxic heat stabilizers promote the use of a more realistic and market space. Currently, hot zinc-based high-performance, non-toxic heat stabilizer stable performance of foreign brands have approached or reached the level of conventional Chrolinated polyethylene  toxic species, there are many domestic manufacturers are also carried out to promote the development and application of zinc-based nontoxic heat stabilizers, although the overall performance of domestic products to be improved, but there are a lot of products to achieve industrial application, and has appeared in some of the higher levels of high-performance products. But
, The current ratio of domestic consumption of environmentally friendly heat stabilizer is still small, the main reason lies in the use of toxic products, compared with the cost also significantly higher. Seen in this light, the future development of environmentally friendly heat stabilizers, in addition to further improve the performance, you should also focus on improving value for money. To protect the health and survival of our people, the environment and improve the international competitiveness of China's PVC industry and related industries to the EU in urgent need of peer learning, take practical measures and steps to promote the development and Titanium dioxide rutile  application of environmentally friendly process heat stabilizers.
Heat stabilizers are a class of polymers can prevent or reduce the heat in the course of processing and degradation or cross-linking occurs, extending the life of composite additives. Usual stabilizers can be divided into categories according to the main component of salt, fatty acid soaps, organotin compounds, heat stabilizers, and the pure compound classes of organic compounds.
1) Heat stabilizer salt: salt stabilizer is the combination of the "base" of lead salts of inorganic and organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost transparency is poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. (Source Global polyurethane network)
2) a fatty acid-based heat stabilizer: Such a thermal stabilizer is a compound consisting of a fatty acid with  Metal stearate a metal ion root, also known as hot metal soap stabilizers, its performance and the kind of metal ions and acid radicals, generally in an amount of 0.1% ~ 3.0%.
3) organotin heat stabilizers: class PVC heat stabilizer molecule with chlorine atoms to form unstable ligand and the ligand organotin carboxylate group and a chlorine atom unstable replacement. Features such heat stabilizers are high stability, good transparency, heat resistance, the downside is expensive.
4) composite heat stabilizer: PVC compound stabilizer is a metal salt or soap as a kind of liquid or solid based compound and an organic tin-based compound, wherein the metal salts are calcium - magnesium - zinc, barium - calcium - zinc, barium - zinc and barium - cadmium; common organic acids such as organic acids, naphthenic acid, oleic acid, benzoic acid and salicylic acid. 5) a thermal stabilizer compounds: Except for a few of such primary heat stabilizer stabilizer may be used alone (primarily nitrogen containing organic compound), but also a high boiling point include polyhydric alcohols and phosphites, phosphates and often stabilizer, the metal can improve the weather resistance, transparency of the composite material, to improve the surface color of the article.

Synthetic lubricants synthesis of the main

Organic synthesis method and the system having a specific structure and properties of lubricants, such as silicone oil , silicone esters , phosphate esters, fluorine oil , ester oil and synthetic hydrocarbon oil. Synthetic lubricants to meet the general mineral oil can not meet the severe operating conditions ( such as aviation , aerospace, deep-sea exploration and nuclear industries ) application requirements. Performance titanium dioxide  by the use of synthetic lubricants can be divided into high and low temperature lubricants, fire resistant lubricants, extreme pressure lubricants, protective lubricants, anti-radiation lubricating oil, lubricating oil antioxidant , high vacuum lubricant oil, electrical and metalworking lubricants oil. Water-based liquid water-based liquid poor lubricating performance than oil , is generally not used for pure lubrication occasions . It is commonly used for the metal cutting process in the cutting fluid , to a  black iron oxide cooling , lubrication, cleaning and rust and other effects , but also for the hydraulic system . Commonly used in industrial water-based liquid is diluted with water from the oil-based emulsion , water -oil -and water-in -oil types . ① In the oil-in -water emulsion , the oil in small droplets dispersed in water , a liquid emulsion was translucent ( droplet diameter of 0.05 to 0.1 microns ) or milky liquid ( droplet diameter of 0.1 to 1 micron time ) . In order to maintain a certain stability of the emulsion , should be added to the liquid from the emulsifying surfactant. Oil-in -water emulsion  calcium zinc stabilizer Foreign Secretary is water, oil content is low , and so the cooling water flow are close to rust, poor lubricity . ② The water-in- oil emulsion , the oil the water , the benefits are not rust, viscosity, can be used as hydraulic oil.

impact modifier and processing modifiers contrast between

Ideal resistance modifier should have the following properties:
① and modification of the substrate must have a good compatibility.
② modifier particle size, morphology medium a diameter of about 200nm is appropriate to protect the effect is a high impact strength .
③ modifier to lower the glass  iron oxide yellow transition temperature is preferred.
④ impact modifier preferably has slightly crosslinked to improve the reinforcing effect .
⑤ modifier processing properties of the resin without prejudice to its apparent performance and physical and mechanical properties without adverse effects.
⑥ requires non-toxic, non-polluting and affordable.
2 , the processing performance modifier
Processing modifier for plastic processing performance is poor and development of a class of additives that are added to improve the polymer in the molten resin flow , and a thermal stability, heat distortion resistance and surface gloss of the material products . Currently, the processing modifier is mainly to improve the melt viscosity of PVC , improved flowability and processability.
Processing modifier primarily polymer, the application is more acrylic copolymer , such as methyl methacrylate / acrylic acid copolymer system (MMA / FA system ) , methyl methacrylate / butyl methacrylate acrylate / ethyl acrylate / methyl methacrylate copolymer systems (MMA / BMA / EA / EMA system ) , methyl methacrylate / ethyl acrylate / acrylonitrile copolymer system (MMA / EA / AN system ), etc. The amount of resin added is usually from 3% to 8%.
( Two ) impact modifiers and processing modifier classification and species
1 , impact modifiers and species classification
① acrylonitrile - butadiene - styrene copolymer (ABS): ABS resin is a graft copolymer of polybutadiene latex is added to the styrene and acrylonitrile monomers copolymerized . Impact modifier for PVC, ABS has a good effect, the toughening effect, while the tensile strength and elongation decrease is small, the general amount of 10% to 20%. ABS  chromium oxide resin due to the presence of unsaturated structures , weather is poor, so products should not be long-term outdoor use . ABS resin is less than the compatibility with PVC, MBS, the product transparency is not as good MBS copolymer ; such as a transparent ABS and PVC blends can obtain a transparent products. When the ABS dosage of 20% to 30 %, the impact strength with excellent results.
② methyl methacrylate - butadiene - styrene copolymer (MBS): MBS is to polybutadiene or butadiene - styrene emulsion , methyl methacrylate graft copolymerized . Adding MBS resin can improve the impact toughness of PVC , polyvinyl chloride increase the transparency , but poor aging resistance of MBS , MBS higher rubber content , the higher the impact toughness . MBS added amount is generally 10% to 17 % is appropriate, more than 30 % of the brittle failure occurs .
③ chlorinated polyethylene (CPE): chlorinated polyethylene of high density polyethylene (HDPE) chlorination , chlorine content is generally 30% to 45% , depending on the resin component , the chlorine content , the molecular structure and morphology different , showing a rigid plastic from the rubber elastic body in different state changes. Molecular weight of 1,000,000 or more CPE is not only good impact resistance , and excellent weather resistance , ABS and MBS overcome the shortcomings of poor weather . In addition , CPE chlorine in a great effect on the size of the modified , low chlorine polyethylene oxide  content , its high crystallinity and poor toughness , high glass transition temperature , poor compatibility with PVC . Chlorine content is too high , CPE 's cohesion is stronger , but relatively poor dispersion . CPE in PVC dosage is generally 5% to 15%. CPE, cold resistance, chemical stability , flame resistance, oil resistance and electrical insulating properties are good .
④ ethylene - vinyl acetate copolymer (EVA): EVA used as modifiers of PVC , the vinyl acetate content should be more than 40 ¥ . EVA good weather resistance, modified PVC products can be used outdoors, but the transparency and tensile strength have declined. The addition of EVA is generally 5% ~ 10%, EVA as the modifier , also be used in the modified polyolefins , to improve weatherability , cold resistance .

Impact modifiers described in some detail

The reason why certain polymers show brittle at room temperature , which is mainly determined by the structure of the polymer itself . Polymer
The brittleness and its molecular main chain flexibility , the molecular chain of the more flexible , its brittleness is smaller , whereas the greater brittleness . All Movies
A flexible polymer chain affected by factors such as the main chain structure , a substituted group, the polymerization degree , crosslinking degree of the polymer can affect the brittle
Sex . To improve the toughness of Impact modifier for PVC  the material , the following three main ways : in
Rubber component introduced into the polymer structure , as in the bulk polymerization of styrene butadiene component may be introduced in
Preparation of high-impact polystyrene (
HIPS, which in situ in the reaction kettle modification techniques suitable for mass production . In
Introducing the polymer backbone monomers low glass transition temperature , such as bisphenol
A polycarbonate raw
Production . Through
After some modification method would have the effect of toughening complexes were blended with polymer materials ,
Thereby enhancing the impact properties of polymeric materials . Such complexes known as impact modifiers , these additives is mainly used polyvinyl chloride
Ene, polystyrene and other plastics . The modified method has the freedom and flexibility characteristics.
1.1
Mechanism of impact modifier
The impact modifier in the polymer research, although there are a large number of scholars have carried out a series of fruitful work , but to
Today there are some issues unresolved , so it is no unified theory. Different scholars have proposed a different interpretation ,
Summarized in the following: rubber absorbs energy theory , shear yield theory, theory of cracks , crazing shear zone management
On other . Due to the use of rubber or elastomer -modified impact of plastics material will also reduce the rigidity of the self
Since there has been replaced by vegetable stearic acid  rigid particles of rubber and elastomer toughened polymers ideas, and the corresponding emergence of non-
Rigid polymer particle toughening machine theory .
Rubber absorbs energy theory
Is stretched when the cross section is substantially found not shrink , thereby setting
Want to cavitation occurs inside the material and the density becomes small ( approximately 8% reduction )
Year. They think its elongation stress whitening phenomenon
Is generated within the material of the hole caused by the scattering of light . Therefore, the argument put forward : when the material strain , in its internal generated a lot of very fine cracks , then there must be a
Of rubber particles across the crack , thus preventing rapid crack
Rapid expansion , while the rubber particles in its consumption of energy during deformation due
, Thereby improving the toughness of the material . As shown, located
Rubber particles in a growth of the crack face , such that material by
To break the impact absorbed energy equal to the Brittle Fracture
We can add on to be broken rubber particles acting combined. While
Explained tensile yield , must liquid stabilizer  assume the formation of a large number of micro- cracks in the rubber particles absorb energy schematic
And each micro-cracks were blocked by rubber particles , micro-cracks are adjacent the substrate a thin layer of polystyrene are separated . Thus, a large tensile strain can be micro- cracks open, the rubber particles are
Elongated and polystyrene layers bend to achieve. Accordingly, they assume that the rubber particles have a "bridge " effect as well as particles having a high flexibility and good adhesion to the substrate with the premise . This theory is that it is the lack of attention to the rubber , while ignoring the polymer matrix . Toughened polystyrene and polyvinyl chloride is concerned, both in the fracture behavior of a significant difference , which is not easy to explain the theory of micro-cracks

PVC processing some of the main trends

Business cards PVC futures , that the subject matter as pvc futures varieties. Namely polyvinyl chloride PVC (polyvinylchloride), the thermoplastic resin . With steel, wood, cement and said the four  plastic processing aid basic building materials, with PP, PE, ABS, PS and said five general-purpose resins, chlor-alkali industry is the largest organic consumption of chlorine products. Contents Introduction PVC PVC PVC physicochemical properties futures trade analysis profile status Exports Imports Consumption of PVC PVC futures Consumption Consumption regional characteristics of Chinese PVC PVC PVC futures main function is to provide enterprise risk avoidance and transfer tool for price discovery help companies out of the blind helps optimize PVC PVC futures price formation mechanism procedures to comply with the  red iron oxide standard delivery main delivery point delivery of PVC benchmark delivery to site selection and non- delivery to the reference design PVC futures risk premiums and discounts between the control and management methods ( a ) price limits system design ( two ) trading margin system design ( three ) position limits institutional design ( four ) forced open system, the large trade reporting system designed to spot PVC PVC futures most active areas of contrast with the electronic trading market PVC futures market price factors 1 , 2 supply and tio2 anatase  demand changes in the international crude oil market volatility four , five national policy changes , raw material price changes 6 , the export situation PVC futures and spot market relations existing PVC futures investment value ( a ) carry trade , a stable income through 2 of arbitrage , arbitrage through the plan period , three , through cross- breed

Broad field of application of titanium dioxide

 Titanium dioxide is a very broad field of application, then the application of titanium dioxide are used in the end what areas and what areas? If you want to know, please read our article carefully to see if you want to know more about titanium dioxide anatase titanium dioxide or magnesium hydroxide flame retardant  related information like him to pay attention to our official website to learn about the latest relevant information, in the hope that our website give you some help.
Titanium dioxide has a high refractive index, particle size distribution of the particles is ideal, with good hiding power and good coloring white pigment widely used in paints, rubber, plastics, paper, inks, daily chemical, electronics, micro-electromechanical and environmental protection industries.
Paint industry: paint industry is the largest user of titanium dioxide. Among them, rutile titanium dioxide coatings industry is mainly consumed. Production of titanium dioxide paint, colorful, high hiding power, color dose, the province focused, variety, stable media can play  yellow iron oxide a protective role, and can improve the strength and adhesive film to prevent cracking, prevent UV and moisture permeability However, to extend membrane life.
Plastics industry: In addition to titanium dioxide plastic, plastic products, can improve the heat resistance, light resistance, weather resistance, improved plastic products physical and chemical properties, and improve the mechanical strength and prolong life. 3 Paper industry: paper industry is a major consumer of titanium dioxide. As the paper burden, mainly used for fine paper and tissue paper. In this file add titanium dioxide, can make paper with good whiteness, gloss, high strength, thin and flexible, printing does not penetrate, the quality of light. Paper is generally used without a surface treatment of the titanium dioxide anatase type titanium dioxide, can be used as optical brighteners, thus increasing the brightness of the document. But requires the use of rutile titanium dioxide rolling treated paper surface in response to light and heat requirements.
4, advanced ink: titanium dioxide or iron oxide yellow  advanced essential white pigment ink. Solid ink containing titanium dioxide does not change color, surface wettability is easily dispersed. Ink industry has been using rutile titanium dioxide anatase.
Chemical industry, chemical fiber and textile fiber textile industry is another important application of titanium dioxide. Chemical fiber titanium dioxide is mainly used as a matting agent. As sweet red, gold anatase, anatase general. The titanium fiber surface usually do not require treatment, but some special varieties to reduce photochemical reaction of titanium dioxide, titanium dioxide, in order to prevent degradation of the photocatalytic effect of the fiber, the need for surface treatment.

PVC (UPVC) injection

Application of stainless steel casting mold, chromium content of at least 13%, preferably 16%, at least 55 Rockwell hardness, hard chrome-plated steel mold can be processed to form a protective effect.
After production, the application of  titanium dioxide anatase a mild lye carefully cleaned and then sprayed mold surface quality oil spray or siliceous spray.
4, the melt temperature
Measure of available air-launched by 185-205 ℃ range. Smoothness of the material from the injection can know the exact upvc melt temperature. If the material in the injection after the rough, as evidenced by the material is not homogeneous (plastics insufficient), which  heat stabilizer for panel means that the temperature set too low; eg, injection newcomer bubble and smoke a lot of smoke, it means the temperature is too high.
5, the injection speed
Slower rate of fire, or cause excessive shear degradation of materials, the use of upvc produce extremely smooth, thick-walled products should be used multi-stage injection mold filling speed.
6, the screw speed
Should match the molding cycle may be. Screw Diethylene glycol dibenzoate  face velocity shall not exceed 0.15-0.2m / s
7, the back pressure
Up to 150bar, the lower the better, common to 5bar.
8, the retention time
At a temperature of 200 ℃, barrel residence time can not exceed five minutes. When the temperature is 210 ℃, cylinder residence time should not exceed 3 minutes.

Deposited zinc stearate

Chemical reagents zinc stearate is often due to improper storage in the storage and deterioration . Some reagents hygroscopic and deliquescence or hydrolysis ; others easily with oxygen in the air , carbon dioxide or other gases diffusion in which to react , and some reagents by  chromium oxide light and ambient temperature will degenerate . Therefore, must be based on the different nature of the reagent , respectively, to take appropriate measures for safekeeping. Preservation methods generally have the following :
1 sealed
After the reagents are generally drawn tightly with a stopper , in particular volatile substances ( such as hydrochloric acid , ammonia ) , and many low boiling point organic compounds ( such as acetone, formaldehyde , acetaldehyde , chloroform, benzene, etc. ) must be tightly closed tightly . Some hygroscopic or a case of steam generating strong hydrolysis reagents such as phosphorus pentoxide , anhydrous AlCl3 , etc., only iron oxide yellow  to close tightly , but also wax seal .
In the air can be spontaneous white phosphorus stored in the water. Reactive metals potassium, sodium To save in kerosene .
2 with brown bottle full bloom and placed in the shade
Light or heat perishable reagents ( such as potassium iodide , hydrogen peroxide , and bromine , chlorine ) to be stored in a brown bottle and placed in a cool place , preventing it from decomposition of deterioration. 3 Dangerous Drugs keep other medicines stored separately
Are easy to explode, burn , toxic, corrosive and  tio2 anatase radioactive and other hazardous substances, as well as by external factors can cause severe chemical accidents , are all hazardous chemicals . They must be stored separately stored , such as perchloric acid can also organics , or prone to explosion. Strong oxidizing substances and organic solvents can corrode the rubber , not in full bloom in a glass bottle with a rubber stopper . Easily affect the purity of the reagent erosion glass reagent , such as hydrofluoric acid , fluoride salt ( potassium fluoride , sodium fluoride , ammonium fluoride ) and caustic alkali (potassium hydroxide, sodium hydroxide ) , shall be stored in polyethylene plastic bottle or a glass bottle coated with paraffin .
Purity: more than 98.0% purity
Specifications : Solid : 5g, 10g , such as different specifications ( specifications , customers can call options )

High concentrations of calcium stearate, zinc stearate

can lead to insulin resistance. According to reports, hyperlipidemia is due to lipid metabolism disorder caused by one or more of the plasma lipid composition characterized by abnormally elevated  Barium soap  concentrations of illnesses. Hyperlipidemia and insulin resistance, diabetes mellitus have a close relationship.
However, there is a serum fatty acid profile in hyperlipidemia studies are concentrated in the fasting state, in their study investigated the postprandial state is still blank stage. As we all know, three meals a day, the body most of the time in a postprandial state, so research postprandial serum fatty acid profile and metabolic changes impact on the body has more practical significance.
By postprandial hyperlipidemia population  PVC heat stabilizer for window changes of serum fatty acid, a fatty acid for the first time found that only calcium stearate, zinc stearate in the postprandial state levels were significantly increased in high concentrations of calcium stearate zinc can lead to insulin resistance, and reduce expression of SREBP-1c to reduce calcium stearate, zinc levels, thereby improving insulin resistance.
Researchers crowd postprandial hyperlipidemia serum calcium stearate, zinc stearate, elevated levels of  PVC window stabilizer the molecular mechanism of high concentrations of calcium stearate, zinc stearate implications for insulin resistance and how to reduce postprandial rise high calcium stearate, zinc stearate level of in-depth research, eventually found increased calcium stearate, zinc stearate, postprandial serum insulin concentration is due to the increase of stimulated calcium stearate, hard de novo synthesis of fat and zinc palmitate direct extension (ELOVL6). By in vivo, in vitro small RNA interference techniques, the researchers confirmed that reduces SREBP-1c or ELOVL6 expression could reduce calcium stearate, zinc levels, thereby improving insulin resistance. Further comparison of the interference in the difference after two targets, they found that inhibition of expression of SREBP-1c can more effectively improve insulin resistance.

aluminum soap of some of the main narrative

Aluminum salts of naphthenic acids or collectively.
By the corresponding sodium soap solution and an aqueous solution of
aluminum sulfate by metathesis reaction.
Usually stearic acid, palmitic acid , oleic acid, naphthenic acid aluminum
soap .
For waterproofing agent , medicine, printing ink , paint and leather fatty
acid sodium collectively. Usually  PVC lubricants consists of oils by saponification
reaction with aqueous sodium hydroxide after the removal of glycerin is
made , but also by fatty acid and sodium hydroxide ( or sodium carbonate )
in an aqueous solution and is made directly . Sodium Soap is an anionic
surfactant, an aqueous solution of a wetting, penetration , foaming ,
dispersion and decontamination properties. Sodium soap is soap and laundry
soap and other cleaning supplies of the main raw material . Sodium soap
uses: mainly used in making cosmetics , detergents , industrial fatty acid
salt , coatings, paints , rubber , soap , water treatment agent , the basic
analytical reagents, preparation of PVC window stabilizer  analytical standards lye, a small
amount of carbon dioxide and moisture absorption agent, and sodium in the
manufacture of the acid . Manufacture of other reagents containing
hydroxide ions ; in papermaking , printing and dyeing , wastewater
treatment, electroplating, chemical drilling on are important purpose.
Metathesis reaction analysis
Metathesis of : the two compounds exchange component , generate additional
reaction of the two compounds , called metathesis reaction . Its essence is
: metathesis reaction occurs two oxidized PE WAX  substances exchange ions in aqueous
solution , with a hard material ionized ---- precipitation, gas , water,
ion concentration in the solution , the chemical reaction is the direction
toward the ion concentration proceed. Can be abbreviated as AB + CD = AD +
CB. Metathesis reaction is the essence of ions in solution combine to form
a substance with ionizing ( such as water ) , insoluble substances or
volatile gases , leaving the metathesis reaction tends to be completed . (
Can be abbreviated as : alkali salt solution , precipitation gas water
generation . Metathesis reaction in order to properly write a chemical
equation , you must memorize the common acid , alkali, salt solubility
table , proper use of the solubility .

PVC heat stabilizers some of the methods used

PVC heat stabilizers torque rheometer test method
Mimic the actual torque rheometer PVC processing a typical small pilot-type apparatus . Outside of the instrument a closed processing tank , connected to the instrument by the computer can polyethylene oxide  control the machining tank temperature, and within two roll speed , torque rheometer added quality of materials is generally 60 ~ 80 g, depending on the apparatus and different models . Experimental steps of: preparing in advance with different thermal stabilizer masterbatch based on PVC masterbatch formulation , in addition to other ships and ACR, CPE, CaCO3, TiO2, lubricants and the like . Torque Rheometer advance the set temperature , when the temperature rose to specify and steady speed , will be weighed mixture added processing chamber , quickly closed records on a computer connected to a variety of parameters , namely flow  n-butyl stearate curve . After processing , you can also get different extrudate physical characteristics , such as whiteness, whether shaping , smoothness and so on. These parameters can determine the corresponding potential industrial heat stabilizers , heat stabilizers suitable shall have suitable torque and plasticizing time of the extrudate should be preferably molded and whiteness, surface smoothing . Torque rheometer in laboratory studies and between industrialized mass production to build a convenient bridge.
PVC heat stabilizers roll blackening test
Determination of thermal stability as a dynamic effect of a class of helper methods , dynamic two-roll used in the  iron oxide black absence of the rheometer , the experiment instrument select double rolled sheet , which together with the high-speed mixed powder , compression molding , the resulting samples were subjected to extruded repeatedly until the black test piece until completely black record time , the time is called blackening . Blackening by comparing the length of time to determine the type of thermal stabilizer effect of the thermal stability of PVC .

PVC heat stabilizers some simple experiments

I'll tell you about PVC heat stabilizers are two common test methods. A process called : Torque Rheometer test method ; second is called roll blackening pilot testing method .
PVC heat stabilizers torque rheometer test method
Mimic the actual torque rheometer PVC processing a typical small pilot-type apparatus . Outside of the instrument a inganic pigments  closed processing tank , connected to the instrument by the computer can control the machining tank temperature, and within two roll speed , torque rheometer added quality of materials is generally 60 ~ 80 g, depending on the apparatus and different models . Experimental steps of: preparing in advance with different thermal stabilizer masterbatch based on PVC masterbatch formulation , in addition to other ships and ACR, CPE, CaCO3, TiO2, lubricants and the like . Torque Rheometer advance the set temperature , when the temperature rose to specify and steady speed , will be weighed mixture added processing chamber , quickly closed records on a computer connected to a variety of parameters , namely flow curve . After processing , you can also get different extrudate physical characteristics , such as whiteness, whether shaping , smoothness and so on. These Diethylene glycol dibenzoate  parameters can determine the corresponding potential industrial heat stabilizers , heat stabilizers suitable shall have suitable torque and plasticizing time of the extrudate should be preferably molded and whiteness, surface smoothing . Torque rheometer in laboratory studies and between industrialized mass production to build a convenient bridge.
PVC heat stabilizers roll blackening test
Determination of thermal stability as a dynamic effect of a class of helper methods , dynamic two-roll used in the absence of the rheometer , the experiment instrument select double rolled sheet , which  Plastic chemical together with the high-speed mixed powder , compression molding , the resulting samples were subjected to extruded repeatedly until the black test piece until completely black record time , the time is called blackening . Blackening by comparing the length of time to determine the type of thermal stabilizer effect of the thermal stability of PVC .

Soap significance

Pneumonia and diarrheal diseases are the two leading causes of death among children under five every year , there are more than 3.5 million children in the world because of diarrhea and pneumonia can not celebrate their fifth birthday soap , wash your hands with soap could save millions of children lives. Also wash your hands can prevent skin infections, eye infections, intestinal parasites , SARS and avian flu , cancer patients and people living with HIV in health benefits.
Soap for all countries and impact modifier  communities in both technical and economic whatever life-saving interventions. Advance the measure , not only because of its healthy , but also because people feel comfortable with soap , can reflect a person's social status , education , hand allows more intimate between people .
After using the toilet , scrub ass to the child after hand contact with food before , these three cases , we must use soap or hand sanitizer .
Soap benefits
Hand washing is the cornerstone of public health , new health behaviors and public health services are infectious disease mortality in the late 19th century rapid decline in rich countries a major factor . And fecal isolation and safe handling, as well as providing a sufficient plastic flame retardant  amount of pure water , like washing hands with soap or hand sanitizer is the prevention of diarrheal disease is one of the most effective ways ( can reduce infection rate half ) , it is also the cheapest way . In addition, handwashing with soap can limit the spread of respiratory disease ( reduced infection rate quarter ) . Moreover, with soap or hand sanitizer is also strong against other diseases barrier ( such as worms , eye infections such as trachoma , skin infections such as impetigo ) .
Soap costs
Handwashing with soap is the most inexpensive health intervention . Disability -adjusted life years (Disability-Adjusted Life Years, DALYs) is the loss of life through an integrated soap costs and the number of years of life lost in disability status to measure the  chromium oxide number of years the burden of disease and the effectiveness of health interventions . Obviously, handwashing with soap is the return of diarrhea-related DALYs most effective method. Handwashing expenditure was significantly lower than immunization , such as: a need to invest DALY cost of measles immunization  between . This is not to say that vaccination is not necessary, but merely pointed out that , due to the general lack of investment to promote hand-washing , we missed a surprising number of ways to use the cheapest life-saving opportunities. Most of the world has affordable family soap, so the cost is not a significant reason for people to wash their hands with soap .

Some narrative optical brightener

Optical brightener (Optical whitener) is a type of fabric and can enhance the whiteness of paper and other organic compounds. Also known as optical brighteners . Fabric, etc. are often  PVC profile stabilizer contained as impurities, and yellow colors , in the past are used for bleaching chemical bleaching methods , are used in the product add brighteners approach. Its role is to absorb the products of invisible ultraviolet radiation into fluorescence radiation purple blue , yellow with the original two colors, a white light radiation , improve the whiteness in the sunlight . Brightener has been widely used in the textile , paper, detergent , soap , rubber, plastics, pigments  iron oxide yellow and paints and so on. Classification
According to the chemical structure can be divided into five categories :
① stilbene , and certain synthetic fibers for cotton fiber , paper , soap and other industries , with a blue fluorescence ;
② coumarin type, having the basic structure coumarone for celluloid , polyvinyl chloride , etc., with a  dibutyl phthalate strong blue fluorescence ;
③ pyrazoline type , for wool, polyamide, acrylic and other fibers , a green fluorescent color;
④ benzo type of oxygen and nitrogen , for acrylic and other fibers and polyvinyl chloride , polystyrene and other plastics , with a red fluorescence ;
⑤ phthalimide type, used for polyester, acrylic, nylon and other fibers , with a blue fluorescence.

PVC heat stabilizers Congo test method

PVC used for the final products of different industries. Different performance, PVC heat stabilizers evaluation and testing will need a different approach. Here to introduce a Congo red paper test method.
According to GB GB2917.1-2002, Congo red test method for testing PVC heat stabilizer, a major test method, the  one pack stabilizer experimental apparatus shown in Figure 1.
Using an oil bath pot, built glycerin, will be tested PVC heat stabilizers mixed with the material after being loaded into a small test tube, so that the material becomes a slight concussion and firm, and then placed in an oil bath pot among glycerol oil bath pot set in advance a temperature of approximately 170 ℃, PVC material within the small tube and the Stearate zinc  upper surface of the upper surface level of glycerin, small tube top, with a thin tube inserted into the plug, the upper and lower transparent glass, the glass tube Congo red paper hit the bottom of the roll inserted so Congo red paper with the lower edge of the upper edge of the PVC material is located about 2 cm. After the start of the experiment, record the test tube to the test tube from Congo red paper turns blue start time is the thermal stabilization time. The basic theory of this experiment is that when the PVC at a temperature of about 170 ℃ when rapid decomposition, but with the addition of a heat stabilizer, suppresses the decomposition, with time, the heat stabilizer consumption occurs when the consumption is completed , PVC dramatically HCl gas decomposition in magnesium hydroxide  this case, the test tube as Congo Red reagent reacts easily with HCl and discoloration, will be immediately apparent, a note of the time determined by the length of time to heat stabilizer the effect of pros and cons.

The main types of PVC

You can use the extruder extruded hoses, cables, wires, etc.; utilize injection molding machine with a variety of molds can be made of plastic
(7740, -270.00, -3.37%) sandals, shoes, slippers, toys, auto parts and so on.
2.pvc film. pvc mixed with additives, plasticizers, the use of three-roll or four-roll calender and  aluminium hydroxide formed into a predetermined thickness of a transparent or colored film,
This method of processing a film, a calendered film. You can also cut, heat processing, packaging bags, raincoats, tablecloths, curtains, inflatable toys. Wide transparent film can be used for greenhouses, plastic greenhouses and film use. The biaxially oriented thin
Film, suffered heat shrinkable properties, can be used for shrink packaging.
3.pvc coating products.
There is pvc artificial leather substrate confused spreads the cloth or paper, and then at 100 degrees or more plasticizing. Also available
In the first pvc calendered into a film with additives, and then laminated together with the substrate. No artificial leather substrate is directly from the rolling machine rolling into a certain thickness of the soft system sheet, and then the pressure on the pattern can be. Can be used to make leather suitcases, purses, book cover,
Sofa and car seat, as well as floor coverings, flooring materials for buildings.
4.pvc foam products.
Soft pvc mixing, adding the  potassium stearate right amount of foaming agent made of sheet material, the foam molding of foam can be used for foam slippers
Sandals, insoles, and shockproof cushion packaging materials. Extruder can also be used as the basis of rigid pvc foam sheet and low profile, alternative timber trial, is a new construction material only.
5.pvc transparent sheet.
pvc impact modifier was added and the organic tin stabilizer, mixing, plasticizing, rolling and a transparent sheet. Using thermal
Molding can be made thin transparent containers or for vacuum packaging, is an excellent packaging materials and  intenal lubricant decorative materials.
6.pvc hard board and sheet.
adding pvc stabilizers, lubricants and fillers, the kneaded, extruded with an extruder to a variety of hard tube diameter, shaped
Tubes, bellows, as the plumbing, water pipes, wire casing or stair railing. Good hot rolled sheets overlap will be
Made of rigid plates of various thicknesses. Sheet can be cut into desired shape and then use pvc welded by hot air welding
Various chemical resistant tanks, duct and containers.
7.pvc other.
Windows and doors with rigid shaped materials assembled. In some countries such as aluminum windows and wood windows and doors windows and doors occupy common market; imitation
Wood materials, and steel building materials (North Sea); hollow container.