Single-component addition type liquid silicone rubber and preparation method thereof

Abstract

The invention belongs to the technical field of liquid silicone rubbers, and particularly relates to a single-component addition type liquid silicone rubber and a preparation method thereof. The single-component addition type liquid silicone rubber comprises, by weight, 20-50 parts of low-viscosity vinyl silicone oil, 20-50 parts of high-viscosity vinyl silicone oil, 20-35 parts of white carbon black, 5-8 parts of hexamethyldisilazane, 1-5 parts of high vinyl silicone oil, 1.5-2 parts of water, 2-4 parts of hydrogen-containing silicone oil, 0.2-0.5 part of a platinum complex and 0.02-0.08 partof 3-methyl-1-dodecyn-3-ol, wherein the total amount of parts by weight of the high-viscosity vinyl silicone oil and the low-viscosity vinyl silicone oil is 70. The invention also discloses the preparation method of the single-component addition type liquid silicone rubber. The single-component addition type liquid silicone rubber can be directly used without metering mixing when used; and the single-component addition type liquid silicone rubber solves the problem of reaction at room temperature, so that protection is not needed during shutdown, and a large amount of cost is saved.

Description

technical field [0001] The invention belongs to the technical field of liquid silicone rubber, in particular to a single-component addition type liquid silicone rubber and a preparation method thereof. Background technique [0002] The two-component addition type liquid silicone rubber currently on the market is composed of A component and B component. This two-component addition-type liquid silicone rubber needs to be measured by equipment according to the ratio of the two components, and then mixed evenly before use. In the above-mentioned metering process, there is the phenomenon of uneven metering of the two, which seriously affects the stability of product performance. In the above mixing process, due to the short mixing time, there is a phenomenon of uneven mixing, which will also affect the stability of product performance. When shutting down, because the two are easily cured after mixing, it needs to be supplemented with component B for protection, and it must be d...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a one-component addition type liquid silicone rubber and its preparation method, aiming to solve the problem that the two-component addition type liquid silicone rubber in the prior art needs to be mixed after metering. When the metering is inaccurate, Technical issues that can lead to unstable product performance

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