Dual composition addition type room temperature solidified silicon rubber used for recording left-behind tracks

Abstract

The invention discloses a dual composition addition type room temperature solidified silicon rubber used for recording left-behind tracks, comprising a basic composition and a catalyst composition with the volume ratio being 1:1; the basic composition comprises the following raw material components: 50-80% of methyl vinyl silicone oil, 0.5-10% of cross linking agent methyl silicone oil containinghydrogen, 0.01-0.5% of inhibitor, 0.2-2% of sagging resisting agent, 3-15% of mould release agent, 1-10% of plasticizer, 5-20% of filler, and 0-5% of pigment; the catalyst composition comprises the following raw material components: 50-80% of methyl vinyl silica gel, methyl vinyl oxosilane coordination platinum complex catalyst, 3-15% of mould release agent, 1-10% of plasticizer, and 5-20% of filler. The invention contains no organic solvent, is safe without toxicity, can not shrink after solidification, is flexible and resistant to tearing, is easy to be torn off form the coated surface, andcan not deform, and the solidified tracks can be perfectly maintained for a long time.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a two-component addition type room temperature curing silicone rubber for recording leftover traces. Background technique [0002] Addition room temperature curing silicone rubber is separated into two components before curing, and one component mainly contains vinyl (-CH=CH 2 ) of methyl vinyl silicone oil and methyl hydrogen-containing silicone oil cross-linking agent, and the main component of the other component is a catalyst containing a platinum complex. When using, mix the two components evenly in a certain proportion, and cure at room temperature. The curing time varies with the formula, ranging from a few minutes to several hours. Two-component addition type room temperature curing silicone rubber curing reaction principle is an addition reaction, the vinyl group on the methyl vinyl silicone oil molecule is catalyzed by the platinum complex with the methyl hydrogen-contai...

AI Technical Summary

Problems solved by technology

Its disadvantages are: (1) The components are not mixed 1:1, there will be errors when extruding by hand, and it is time-consuming and inconvenient to use; (2) The formula contains organic solvents and has a pungent smell; (3) After mixing, use The tongue depressor or scraper is applied to the surface of the trace, and the spatula or scraper is easy to touch the trace, resulting in deformation and distortion of the trace, (4) slow curing speed (about 10 minutes at room temperature), (5) the clarity of collected fingerprints needs to be improved