Room temperature vulcanized fluorosilicone rubber and preparation method thereof
A technology of fluorosilicone rubber and room temperature vulcanization, which is applied in the field of silicone rubber, which can solve the problems of rising colloidal temperature, rubber cross-linking and scrapping, and system viscosity rising, so as to improve oil resistance, enhance bonding performance, improve dispersibility and compatibility capacitive effect
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Embodiment 1
[0055] This embodiment provides a room temperature vulcanized fluorosilicone rubber and its preparation method, the steps are as follows:
[0056] (1) Preparation of methoxy-terminated fluoropolysiloxane
[0057] Mix trifluoropropyltrimethylcyclotrisiloxane, octamethylcyclotetrasiloxane and vinyl double head, then add macroporous cation exchange resin D002 to carry out polymerization reaction, after the reaction, filter and remove In addition to low-molecular reactants, vinyl-terminated fluorosilicone oil can be obtained; understandably, products with different fluorine contents can be prepared by adjusting the ratio of raw materials.
[0058] Mix the vinyl-terminated fluorosilicone oil and trimethoxyhydrogensilane, add a platinum catalyst, and carry out a hydrosilylation reaction at 65°C. The reaction time is 4h. Removal of small molecule reactants to prepare methoxy-terminated fluorine-containing polysiloxane.
[0059] (2) Prepare substrate tackifier
[0060] (3,3,3-trifl...
Embodiment 2
[0070] This embodiment provides a room temperature vulcanized fluorosilicone rubber and its preparation method, the steps are as follows:
[0071] (1) Preparation of ethoxy-terminated fluoropolysiloxane
[0072] Mix trifluoropropyltrimethylcyclotrisiloxane, octamethylcyclotetrasiloxane and vinyl double head, and then add tetramethylammonium hydroxide to carry out polymerization reaction. In addition to low-molecular reactants, vinyl-terminated fluorosilicone oil can be obtained; understandably, products with different fluorine contents can be prepared by adjusting the ratio of raw materials.
[0073] Mix the vinyl-terminated fluorosilicone oil and triethoxyhydrogensilane, add a platinum catalyst, and carry out a hydrosilylation reaction at 65°C. The reaction time is 4h. After the reaction, vacuumize, at 130°C, -0.1Mpa The small molecular reactant is removed under the condition of ethoxy-terminated fluorine-containing polysiloxane.
[0074] (2) Prepare substrate tackifier
...
Embodiment 3
[0085] This embodiment provides a room temperature vulcanized fluorosilicone rubber and its preparation method, the steps are as follows:
[0086] (1) Preparation of methoxy-terminated fluoropolysiloxane
[0087] Mix trifluoropropyltrimethylcyclotrisiloxane, octamethylcyclotetrasiloxane and vinyl double head, then add trifluoromethanesulfonic acid to carry out polymerization reaction, after the reaction, add sodium bicarbonate After neutralization, the low-molecular reactants are removed to obtain vinyl-terminated fluorosilicone oil; understandably, products with different fluorine contents can be prepared by adjusting the ratio of raw materials.
[0088] Mix the vinyl-terminated fluorosilicone oil and trimethoxyhydrogensilane, add a platinum catalyst, and carry out a hydrosilylation reaction at 65°C. The reaction time is 4h. Removal of small molecule reactants to prepare methoxy-terminated fluorine-containing polysiloxane.
[0089] (2) Prepare substrate tackifier
[0090] ...
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