Latex reclaimed rubber is an ideal substitute for natural rubber to produce rubber products. Usually, a certain amount of stearic acid is added to reclaimed latex reclaimed rubber products to theoretically improve the processing technology of reclaimed rubber and the properties of reclaimed rubber products. So stearic acid in latex reclaimed rubber products formula what exactly what role?
First of all, let's take a look at stearic acid: Stearic acid is a white or white-like powdery or crystalline lump with a delicate acicular microstructure with a microstrip luster; In the rubber industry, it is a widely used vulcanization activator in natural rubber, synthetic rubber and latex. It can also be used as plasticizer and softener.
Latex reclaimed rubber products added stearic acid formulations, mainly in the following several roles:
1, stearic acid in the production of latex reclaimed rubber products can be used as a release agent, is conducive to the successful release of latex reclaimed rubber products;
2, the use of latex reclaimed rubber production Foam rubber products such as foam sports soles, stearic acid can be used as a rubber blowing agent;
3 stearic acid in the rubber reclaimed rubber opening process can adjust its Mooney viscosity (ie, sticky roller), to improve the operability of rubber latex reclaimed rubber to improve latex reclaimed rubber processing technology;
4, stearic acid can slow latex curing rubber products vulcanization rate, to prevent the occurrence of scorch phenomenon;
5, the biggest role of stearic acid is to work together with zinc oxide to improve the vulcanization efficiency of recycled rubber products to improve the overall performance of recycled rubber products, generally adding 2-2.5 parts of zinc oxide need to join about 1.5 parts of stearic acid. Stearic acid and zinc oxide to form zinc soap to improve the solubility of zinc oxide in the rubber to improve the vulcanization system curing agent and accelerator activity and improve the vulcanization system curing efficiency; zinc stearate and zinc oxide formed with zinc Chelation of crosslinked bonds in latex reclaimed rubber will protect weak bonds in the rubber molecules, form short crosslinks and increase or decrease new crosslinks, improve the density of latex reclaimed rubber, and then improve the reclaimed rubber product Tensile stress and hardness and other indicators.
Thus, stearic acid plays an irreplaceable role in the production of latex reclaimed rubber products and is an indispensable chemical auxiliary.
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