Zinc stearate, plays an important role in the coating

Zinc stearate is mainly used in paint wood primer , since filling role in enhancing polish . Transparency, transparency of the coating effect is small, especially for transparent primer. With the direct method zinc stearate manufacturers slowly increased competitive pressures in the domestic zinc stearate coating performance has been dramatically improved. Zinc stearate coating , in addition to focusing on grinding and transparent , but also some other factors such as oil absorption , thickening , particle size, dispersion , etc. on the overall performance of methyl tin stabilizer  wood have also been affected. Zinc stearate mainly in wood primer has several technical indicators affect its paint performance: 1, polish
In wood primer , grinding performance in the paint is a very important indicator , the usual test method is the same coating formulation , spray plate while at the same time grinding test , there is no fixed standard . 2 , in a transparent primer transparency , transparency direct impact on the aesthetic appearance of wood . Thus , the production of zinc stearate, water can not be used in the transparent wood , mainly because of too many impurities . The direct method in the production of zinc stearate is able to meet the requirements of purity , but also very high demands on the process , different production processes a great impact on the transparency , there may be slight differences on the process of transparency led to huge differences 3 , thickening production of coatings thickened manufacturers of zinc stearate is acceptable because zinc stearate added to the paint finished products , to determine its viscosity , the factory already settled indicator , the error is even in ± 500mP · s, so the test method of thickening zinc stearate is generally used to test a rotational viscometer , the viscosity and good  yellow iron oxide dispersion if just a few hours after the deviation is greater than the viscosity 500mP · s, as thickening 4 , oil absorption amount of oil and thickening think not the same concept , oil volume ratio of added amount in the same conditions, make the product viscosity, the viscosity does not exceed a period of time the error value ± 500mP · s. Oil Absorption test standards "DIN ENISO787-5-1995", usually in the PU coating on the oil absorption is not much demand because of the production will not cause much impact, paint manufacturers have high requirements on oil absorption , it may be some paint manufacturers to add more solvent , but want to reduce solvent evaporation , we must find some high oil absorption material added to it , and the amount of zinc stearate oil relative to other additives are higher oil absorption 5 additives , particle size is to indicate the size of the indicator particles of zinc stearate , are  titanium dioxide anatase generally used to measure the fineness . The easiest test is usually the result fineness is the fastest scraper fineness, usually in alkyd resin by adding a certain percentage of zinc powder dispersion , then add a little solvent viscosity good tune , and then use Fineness gauge testing, such test results will be higher than the actual fineness little too large , because the resin powder is wrapped in possession of a certain thickness , but as long as comparable and reproducible set standards in this test method can be to measure whether the excessive fineness . 6 , dispersed in the paint manufacturing process , there are many manufacturers dispersion problems mentioned . Under normal circumstances , zinc stearate dispersed in the paint is not a problem , but in the production of zinc stearate , there will be some indicators will cause the dispersion of certain effects, such as zinc stearate acid value is too high, the temperature is too high semi workers pressure occurs when the package is too severe zinc in the coating dispersion bad problem , but if the water is too high in zinc crystals also occur problems are considered dispersion good.