High-strength anti-yellowing rubber

Abstract

The invention discloses high-strength anti-yellowing rubber. The high-strength anti-yellowing rubber comprises the following components: 70-90 parts of natural rubber, 10-30 parts of butadiene rubberBR9000, 3.5-6 parts of zinc carbonate, 1-2 parts of stearic acid, 1-2 parts of an anti-aging agent BHT, 0.3-0.8 part of an accelerator NS, 1-2 parts of an anti-yellowing promoter ZDTP-50, 4-6.5 partsof polyethylene glycol, 35-55 parts of white carbon black, 25-35 parts of titanium dioxide, 0.8-2 parts of a coupling agent Si69-50, 5-10 parts of a vulcanizing agent, 15-35 parts of white mineral oil, wherein the vulcanizing agent is a sulfur dichloride-loaded mesoporous molecular sieve. The high-strength anti-yellowing rubber is prepared mainly from the natural rubber and butadiene rubber, and the whole yellowing resistance is improved through addition of the anti-yellowing promoter ZDTP; and sulfur dichloride as a key to the high-strength anti-yellowing rubber is loaded on the mesoporous molecular sieve, vulcanization is achieved on the one hand, vulcanization can also be promoted on the other hand, and the mechanical properties of the rubber material are also improved.

Description

technical field [0001] The invention relates to a polymer material, in particular to a high-strength anti-yellowing rubber. Background technique [0002] Rubber (Rubber) refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. [0003] However, since the development of the rubber industry in the nineteenth century, sulfur is still the main rubber vulcanizing agent. Traditional sulfur vulcanization has problems such as poor solubility, uneven crosslinking structure, easy migration and volatilization, high free sulfur content, and easy vulcanization reversion, which will adversely affect the performance of vulcanized rubber. The sulfur vulcanization reaction is often dominated by polysulfide bond crosslinks with poor thermal stability. As the vulcanization time increases, the polysulfide bond c...

AI Technical Summary

Problems solved by technology

Traditional sulfur vulcanization has problems such as poor solubility, uneven cross-linking structure, easy migration and volatilization, high free sulfur content, easy vulcanization and reversion, etc., which will adversely affect the performance of vulcanized rubber.

The sulfur vulcanization reaction is often dominated by polysulfide bond crosslinks with poor thermal stability. As the vulcanization time increases, the polysulfide bond crosslink structure often causes vulcanization reversion, resulting in a decrease in the mechanical properties of the vulcanizate.