Vulcanization accelerator composition as well as preparation method and application thereof

Abstract

The invention discloses vulcanization accelerator composition. The vulcanization accelerator composition comprises pre-dispersion host master batch granules and pre-dispersion ligand master batch granules, wherein the pre-dispersion host master batch granules comprise 3-mythyl-2-thiazolidinone, the pre-dispersion ligand master batch granules comprise mixtures of organic amine compounds and benzimidazole compounds; each type of master batch granules further comprise rubber, stearic acid, pentaerythritol aliphatic ester, ethylene-vinyl acetate copolymer and/or ethylene-vinyl ester copolymer, rubber in liquid polar plasticizers and at least one other ingredient. Through cooperation of the two types of master batch granules, vulcanization of a chloroprene rubber system is synergistically accelerated, the vulcanization characteristic of the master batch granules is equivalent to that of ETU (ethylene thiourea), the processing property doesn't change, the comprehensive physical and mechanical properties are equivalent, the compression set performance of a product of the master batch granules is superior to that of ETU vulcanization accelerator products, and the product quality is improved.

Description

technical field [0001] The invention relates to a rubber auxiliary agent, in particular to a vulcanization accelerator composition formed from pre-dispersed main body master rubber particles and pre-dispersed ligand master rubber particles, as well as its preparation method and application. Background technique [0002] Thiazole and sulfenamide rubber vulcanization accelerators are substances that can promote sulfur vulcanization, which can promote the activation of sulfur vulcanizing agents, thereby accelerating the cross-linking reaction between sulfur vulcanizing agents and rubber molecules, shortening vulcanization time and reducing vulcanization. Temperature, reducing the amount of vulcanizing agent and improving the physical and mechanical properties of rubber and other practical effects. It can be used alone or in combination with dithiocarbamates, thiurams, thioureas, guanidines and other alkaline accelerators. It is mainly used in the manufacture of tires, tapes, ru...

AI Technical Summary

Problems solved by technology

[0003] At present, the rubber vulcanization accelerators widely used in the market include MBT, MBTS, CBS, TBBS, ZDEC, ZDMC, ZDBC, TMTD, TMTM, ETU, DETU, DPG, DOTG, etc., according to the different rubber systems to be vulcanized, so as to choose Use different rubber vulcanization accelerators, for example, neoprene rubber has excellent heat resistance, weather resistance, abrasion resistance, oil resistance, flame retardancy, and is widely used in the manufacture of hoses, tapes, wire sheaths, cable sheaths, printing Rubber rollers, rubber sheets, pads and shock-absorbing washers or spacers, vinyl thiourea (ETU, toxic identification as T, R61, R22), because it can provide vulcanized rubber elongation stress, resilience, The optimal balance of compression set and heat aging resistance has become the vulcanization accelerator that the neoprene vulcanization system has always relied on. However, vinyl thiourea ETU is a compound with direct and indirect toxicity and potential carcinogenicity. The use in the process not only seriously pollutes the environment, but also endangers people's health. Therefore, from the perspective of environmental protection, it is not a recommended vulcanization accelerator product.

However, due to the specificity of existing vulcanization accelerators for rubber vulcanization, it cannot be replaced by other existing rubber accelerators, such as thiazole MBT or MBTS, sulfenamide CBS or TBBS, thiuram TMTD Or the active functional groups of TMTM accelerators are suitable for the production of diene rubbers for tires, and cannot be used to accelerate the vulcanization of neoprene rubber at all, but can only be used to improve the process safety of neoprene vulcanization

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