The role of zinc stearate in the compound
As we all know, zinc stearate has many functions such as softening and plasticizing. As an external lubricant, it is beneficial to the full diffusion of carbon black, silica and zinc oxide, and the reaction of zinc oxide or alkaline accelerator can promote its activity. Or the primary vulcanization accelerator can act as a secondary accelerator to accelerate hardening. What is the effect of zinc stearate on the glue? The following Hongyuan Chemical Industry will explain to you.
1. Zinc stearate has a great influence on rubber materials, and its main effect is the opposite of carbon black.
2. Zinc stearate significantly reduces the viscosity of the adhesive, improves the technical performance, and significantly increases the plasticity of the adhesive
3. The length of fatty acid carbon chain has no effect on its efficacy, such as lauric acid and oleic acid have good softening effects;
4. However, the high unsaturation of oleic acid will interfere with the rubber processing process, and oleic acid also tends to increase the aging of rubber;
5. The acid value of lauric acid is very high, which will greatly delay the vulcanization of rubber. The factory needs to change the formula and adjust the process parameters. Restricted by the formulation and consideration of certain parameters, all companies basically only use stearic acid as a product.
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