pvc heat stabilizer nine conclusions applied research

 This paper describes the application of pvc heat stabilizer nine major conclusions, and how come these nine conclusion it? In a later article, we will gradually introduce. Described here first introduced under direction from pvc heat stabilizer material applied research, experimental and research methods, to give you parse. Put the  carbon black powder following pvc heat stabilizer applied research in nine conclusions introduce to you, for everyone to learn.
(L) the unmodified hydrotalcite was added to the PVC, thermal stability is not good, but through the organic acid-modified hydrotalcite is significantly improved the thermal stability of PVC resin, as dodecyl sulfonate-modified hydrotalcite hydrotalcite compared with the ordinary, thermal stability time of 25 minutes, and after stearate modified hydrotalcite thermal stability time of 45 minutes, the described modified hydrotalcite stearate for improving the thermal stability of PVC play significant role.
(2) non-modified hydrotalcite flow properties of the materials added to some extent, the torque is too large, adding stearate modified hydrotalcite materials can significantly reduce the  minimum torque and the balance torque, when the content of 4 parts, material flow, processing performance is best.
(3) dodecyl sulfonate, stearate modified hydrotalcite hydrotalcite organic acid ions into the interlayer, so that the plastic processing aid hydrotalcite has a large inter-layer space, easy thermal decomposition of PVC into the layers of Cl and organic acid exchange, both to prevent the HCI catalytic decomposition of PVC, is such that the resultant sulfonate and lauryl stearate dispersible and lubrication, the other organic acid adsorbed on the hydrotalcite may be oriented on the surface, so that the water Talc has a charge resistance, to prevent agglomeration of particles of hydrotalcite and hydrotalcite organic acid surface with covalently bound cations, organic hydrophobic chain to the outer end toward the hydrotalcite better dispersed in the PVC, so that greatly increase the absorption capacity of HCI.
(4) stearic acid-modified hydrotalcite and calcium stearate, zinc stearate, p-diketone complex were optimum content of 4, 0. Clever parts, 0.2 parts and 0.2 parts, and stearic acid-modified hydrotalcite compound and a p-diketone with a certain degree of weathering resistance.
(5) by infrared spectroscopy, confirming pentaerythritol and adipic acid as raw materials synthesized by direct esterification product of adipic acid pentaerythritol cool the target.
(6) adipic acid pentaerythritol cool identified the optimum conditions: Xylene sulfonic acid as the catalyst; xylene as water; pentaerythritol: adipic acid = 3.4:1; unitary purpose temperature controlled at about 175 ℃ The reaction time is 1.5 a Zh
(7) The synthesis process using cool products pentaerythritol adipate, pentaerythritol adipate vinegar alone will heat stabilizer added to the PVC, the initial performance is excellent, but long-term stability, good, 2 parts of cool and 1.5 parts The Ca-Zn compound to form a non-toxic, weather organic heat stabilizers for PVC, the soap can inhibit zinc burning phenomenon peculiar to zinc, zinc and calcium have a good synergy, and its thermal stability when IhJ up to 34min.
(8) pentaerythritol cool to join the  zinc borate flow properties of the material have a certain impact, increasing the content of unitary purpose material can significantly reduce the minimum torque, improved materials processing performance when pentaerythritol cool content of 2 parts, the material flow properties, best processing performance.
(9) calcium zinc stabilizer complex brew with pentaerythritol PvC can significantly shorten plasticizing time, improve initial coloration of PVC, inhibiting zinc burning phenomenon, reducing the processing time consuming.