Room temperature vulcanized silicone rubber and preparation method thereof

Abstract

The invention discloses room temperature vulcanized silicone rubber and a preparation method thereof, and the room temperature vulcanized silicone rubber comprises the following components: 90-120 parts of alpha, omega-dihydroxy polydimethylsiloxane, 3-8 parts of methyl silicone oil, 5-15 parts of methyltrimethoxysilane, 5-10 parts of 3-aminopropyltriethoxysilane, 120-200 parts of nano calcium, 25-40 parts of YYDE-20 expansion foaming powder, and 0.5-1 part of organic tin catalyst. The preparation method comprises the following steps: stirring and dehydrating alpha, omega-dihydroxy polydimethylsiloxane, nano calcium, expanded foaming powder and methyl silicone oil under a vacuum condition, cooling to room temperature to obtain a mixture A, adding a cross-linking agent, carrying out vacuum stirring at room temperature, adding a coupling agent and an organic tin catalyst, and carrying out vacuum stirring at room temperature to obtain a finished product. The invention has the characteristics of good stability, strong corrosion resistance and low cost.

Description

technical field [0001] The invention belongs to the technical field related to organic silica gel materials, and in particular relates to a room temperature vulcanized silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately. There are usually two organic groups connected to the silicon atom. Excellent performance. At present, silica gel is mainly used as sealant in the frame of new energy solar modules. The main components of mainstream silicone sealant products are α, ω-dihydroxy polydimethylsiloxane as the base resin, and ketoximosilane as the crosslinking agent. , Aminosilane as tackifier, organotin as catalyst, and filled with calcium titanate, quartz powder, titanium dioxide and other fillers. With the continuous development of the solar module industry and the increasingly stringent cost control of raw materials, the cost of the original s...

AI Technical Summary

Problems solved by technology

With the continuous development of the solar module industry and the increasingly stringent cost control of raw materials, the cost of the original silicone rubber used for the frame of the solar module has dropped again and again. It can be achieved by adding fillers as much as possible, but the unit volume will be reduced if the filler is too much and the density is too large, and the performance will decrease