Dual composition addition type room temperature silicon disulfide rubber containing phase transformation material

Abstract

The invention discloses a dual composition addition type room temperature silicon disulfide rubber containing phase transformation material, comprising a basic composition and a catalyst composition with the volume ratio being 1:1; the basic composition comprises the following raw material components: 20-40% of methyl vinyl silicone oil, 0.5-3% of cross linking agent methyl silicone oil containinghydrogen, 0.01-0.5% of inhibitor, 1-10% of plasticizer, 30-60% of silicon dioxide premix filler, 3-15% of other filler, 1-5% of additive, and 0-5% of pigment; the catalyst composition comprises the following raw material components: 20-40% of methyl vinyl silica gel, methyl vinyl oxosilane coordination platinum complex catalyst, 1-10% of plasticizer, 30-60% of silicon dioxide premix filler, 3-15%of other filler, and 1-5% of additive. The invention ensures the room temperature vulcanization velocity of the dual composition addition type room temperature silicon disulfide rubber to maintain constant basically in a wider temperature range, is suitable for manufacturing dental impression and ear impression materials, heat insulation protection materials, curtains, vehicle seat cushions, drugpackage materials, cold-proof materials and the like.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a two-component addition type room temperature vulcanized silicone rubber containing a phase transition material. Background technique [0002] Addition RTV silicone rubber is divided into two components before vulcanization, one component is mainly methyl vinyl silicone oil and methyl hydrogen-containing silicone oil crosslinking agent, and the other component is mainly a platinum complex catalyst. When using, mix the two components evenly in a certain proportion, and vulcanize at room temperature. The principle of the vulcanization reaction of two-component addition type room temperature vulcanized silicone rubber is an addition reaction. The vinyl group on the methyl vinyl silicone oil molecule is catalyzed by the platinum complex with the silane hydrogen (-SiH) of the methyl hydrogen silicone oil crosslinking agent. Hydrogen) undergoes an addition reaction to generate -CH 2 -...

AI Technical Summary

Problems solved by technology

It directly mixes the phase-change material accounting for more than 40% of the weight of silicone rubber with silicone rubber, which reduces the physical and mechanical properties of the silicone rubber material. The liquid phase-change material will separate from the silicone rubber in a short time and precipitate, greatly shortening the material. service life