A two-component addition cured room temperature vulcanization silicone rubber is elastic silicone hydrogel and silicone rubber branch, the former lower strength, the latter with high strength. The vulcanization mechanism is based on silicone rubber end vinyl ( or vinyl ) and cross linker molecules on silicon hydrogen addition reaction ( hydrosilylation reaction ) to complete the.
In the reaction, including hydride functional polysiloxane as cross-linking agent ( curing agent ) chloroplatinic acid or other soluble platinum compounds as catalyst. In the room temperature vulcanization reaction is carried out under. Don't release by-products. Due to the crosslinking process does not produce low molecular compounds, so the addition cured room temperature vulcanization silicone rubber vulcanizing process does not produce contraction at. This kind of vulcanizate non-toxic, high mechanical strength, excellent hydrolytic stability ( even in a high pressure steam below), good low compression deformation, low flammability, depth of vulcanization, and the curing speed can be used in temperature control and other advantages, therefore, is currently at home and abroad to develop a kind of silicone rubber.
Addition cured room temperature vulcanization silicone rubber packing way is generally divided into M, N two components: the catalyst and the packaging containing vinyl group silicone polymer can be as a component; hydrogen containing polysiloxane chain agent as one of the other components. High intensity of addition-cured room temperature vulcanization silicone rubber as the line low shrinkage, curing time is not emit low molecular, so is the molding material. In the machinery industry has been widely used for the mould to cast epoxy resin, polyester resin, polyurethane, polystyrene, vinyl, paraffin, low melting point alloy, coagulation for. Use of addition-cured room temperature vulcanization silicone rubber high imitation true, no corrosion, simple molding process, easy mold release characteristics, applicable to the cultural reproduction and art reproduction.
2 of two-component silicone rubber
1, two-component silicone rubber can be used as a " clothing, shoes, caps on the use of plastic signs "?
In 2, the two-component silicone rubber where can buy? The price is probably how much?
Add molding two-component silicone rubber can be used to do all kinds of clothing label, the industry generally referred to as signs of plastic or plastic trademarks. The mechanical strength requirements are as follows: tensile strength:≥ 5MPA≥ 14KN / M; tear strength; elongation hardness≥ 200%; 40± 2 (more than for the Japanese production of silicone rubber ).
The silicone rubber plastic mold and high temperature glue cost than taller, market price is higher also. But its different vulcanization mechanism, rapid prototyping process, excellent machining performance and products high precision is compared to other various types of silicone rubber.
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