Brominated butyl/chlorinated butyl rubber composition and preparation method thereof

Abstract

The invention relates to a brominated butyl / chlorinated butyl rubber composition for gas masks. The composition comprises the following components in parts by weight: 100 parts of rubber matrix, 50-60 parts of carbon black N220, 5 parts of zinc oxide, 0.1-0.5 part of sulfur, 1 part of stearic acid, 1-4 parts of plasticizer (paraffin oil: DOP (dioctyl phthalate): DBP (dibutyl phthalate) is 2: 1: 1), 2 parts of promoter, 1 part of anti-aging agent and 0.5 part of anti-scorching agent, wherein the rubber matrix is composed of brominated butyl rubber and chlorinated butyl rubber. As for vulcanized rubber prepared by using the brominated butyl / chlorinated butyl rubber composition, the tensile strength is 18.50MPa, the elongation at fracture is 539%, the 300% stretching strength is 9.30MPa, the tearing strength is 39.45kN.m<-1>, the Shore hardness is 54, the tension set is 10%, and the brittleness temperature is -50 DEG C; and after the vulcanized rubber is aged in hot air (70 DEG C * 72h), the tensile strength is 17.91MPa, the elongation at fracture is 569%, the aging coefficient achieves 100%, the sustainable time of resisting mustard gas of the vulcanized rubber is greater than 3600min, and the comprehensive performances of the vulcanized rubber can completely meet the performance requirements of cover body materials of the gas masks.

Description

technical field [0001] The invention relates to the technical field of rubber vulcanizate preparation, in particular to a blend of brominated butyl rubber and chlorinated butyl rubber used in gas mask rubber. Background technique [0002] Gas masks appeared after the use of poison in Germany in World War I. They are mainly used to protect the user's face, eyes and respiratory system from toxic gases and liquids, and to regulate the air. Therefore, it is usually required that the gas mask mask material has a long protection time against toxic gas or liquid, good weather aging resistance and thermal oxygen aging resistance, good low temperature resistance, good elasticity, small deformation, and should not change with temperature. It has large fluctuations, is non-toxic, harmless, non-irritating to the skin, has no special smell, has good process performance, and is convenient for processing and manufacturing. [0003] Early gas mask masks were made of natural rubber. Later, ...

AI Technical Summary

Problems solved by technology

Guo Yuexin et al. (BIIR gas mask mask rubber formula design, 2010, Volume 57: 623) used brominated butyl rubber as the mask material, and the formula was 100 parts of BIIR, 3 parts of ZnO, 40 parts of N330, 15 parts of N220, 1 part of Vaseline, 2 parts of paraffin oil, 2 parts of DOS, 2 parts of DOP, 0.5 part of KH-550, 1 part of SA, 1 part of antioxidant, 1 part of TMTD and 0.6 part of DM, the tensile strength of the obtained material is 15.4MPa, The tear strength is 42KN.m-1, the brittleness temperature is -45℃, and the duration of anti-mustard gas of the sample is greater than 480min; the anti-virus prepared by bromobutyl rubber The tensile strength of the mask shell material is low, while the price of bromobutyl rubber is high, and the cost of the shell material is high