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Home> Industry Information> Application of thickening and oil absorption of zinc stearate in coating industry

Application of thickening and oil absorption of zinc stearate in coating industry

November 19, 2019


1.Thickening of zinc stearate

Manufacturer of paint thickening of zinc stearate is not acceptable, because the zinc stearate added to the coating made of finished product, its viscosity is determined, the index of the factory has been set, even if the error is + 500 mp s., so the test method of zinc stearate thickening is also commonly used rotary viscometer to test, if just hours after good viscosity of dispersion and the viscosity of deviation is more than 500 mp, s, as a thickening.If stearate zinc thickens, so coating manufacturer produces the finished product that tests to be able to be mixed when using very big, even originally the viscosity that the requirement when producing coating is bigger, add stearate zinc to be thickened, this is likely to cause paint fundamental flow not to move, especially PE coating, bring about cure to scrap.So thickened zinc stearate is not or rarely used in paint, this is also a lot of zinc stearate manufacturers but only a small number of manufacturers sell paint level zinc stearate.


2. Oil absorption of zinc stearate

In my opinion, oil absorption and thickening are not the same concept. A large amount of oil absorption means that the finished product has a large viscosity under the condition of the same proportion of addition, and the viscosity will not exceed the error value of ±500mP·s after being placed for a period of time.Oil absorption test standards of DIN ENISO787-5-1995 ", generally in the PU coating of oil absorption quantity not too big, because the production will not cause too big effect, also have a paint manufacturer of high oil absorption, it may be some paint manufacturers add more solvent, and want to reduce the evaporation of the solvent, must find some of high oil absorption material, added, and the oil absorption of zinc stearate relative to other additives is high oil absorption agent.But PE coating can ask to absorb oil amount commonly low, because below the circumstance that formulates affirmatory, absorb oil amount is lower, can reduce from production to use to PE paint or avoid the risk that because viscosity is too big product curable, avoid.

Anticorrosion PigmentsInkjet Receptive CoatingMatting Agent


Silicon Dioxide B 80

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