Double-component addition-type liquid silicone rubber as well as preparation method of same

A liquid silicone rubber, addition molding technology, applied in the coating and other directions, can solve the problems of poor adhesion of the addition silicone rubber, the peeling off of the silicone coating, etc., to achieve good compatibility and permeability, fast vulcanization speed, and improve efficiency. Effect

Inactive Publication Date: 2018-06-29
佛山市天宝利硅工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the existing addition-type silicone rubber has poor adhesion to fabrics and the silicone coating formed by curing is easy to fall off from the surface of the fabric, the invention provides a two-component addition-type liquid silicone rubber and its preparation method

Method used

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  • Double-component addition-type liquid silicone rubber as well as preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Add 100 parts of vinyl-terminated silicone oil with a viscosity of 20000mpa.s and 5 parts of vinyl-terminated side-chain vinyl silicone oil with a viscosity of 1000mpa.s into the kneader and stir evenly, then mix 40 parts of 2 / g of fumed silica, 12 parts of silazane treatment agent and 3 parts of water were added to the kneader for 3 hours and stirred for 3 hours, then heated to 150°C for 2 hours, then vacuumed for 2 hours, discharged, and passed through three-roll grinding Machine, get base glue.

[0032] 2. Take 100 parts of base glue, add 8 parts of vinyl-terminated silicone oil with a viscosity of 20000mpa.s, 1 part of tackifier and 0.5 parts of platinum catalyst (vinyl chromium compound 2000ppm) and stir in a planetary mixer at 30rpm for 1h until uniform Get A component.

[0033] 3. Stir 60 parts of vinyl-terminated silicone oil with a viscosity of 5000mpa.s, 40 parts of hydrogen-containing silicone oil (0.5% hydrogen content) and 0.36 parts of inhibitor 1-eth...

Embodiment 2

[0038] 1. Add 100 parts of vinyl-terminated silicone oil with a viscosity of 10000mpa.s and 5 parts of vinyl-terminated side-chain vinyl silicone oil with a viscosity of 1000mpa.s into a kneader and stir evenly, and then mix 40 parts of a specific surface area of ​​300m 2 / g of fumed silica, 10 parts of silazane treatment agent, 2 parts of siloxane treatment agent and 3.5 parts of water were added to the kneader and stirred for 3 hours, then heated to 150 ° C for 2 hours, and then vacuumed for 2 hours. The material is discharged and passed through a three-roll mill to obtain the base rubber.

[0039] 2. Take 100 parts of base glue, add 8 parts of vinyl-terminated silicone oil with a viscosity of 10000mpa.s, 1 part of tackifier and 0.5 parts of platinum catalyst (vinyl chromium compound 2000ppm) and stir in a planetary mixer at 30rpm for 1h until uniform Get A component.

[0040] 3. Stir 20 parts of vinyl-terminated silicone oil with a viscosity of 2000mpa.s, 80 parts of hydro...

Embodiment 3

[0045]1. Add 100 parts of vinyl-terminated silicone oil with a viscosity of 20000mpa.s and 5 parts of vinyl-terminated side-chain vinyl silicone oil into the kneader, and then add 40 parts of 2 / g of fumed silica, 10 parts of silazane treatment agent, 4 parts of siloxane treatment agent and 3.5 parts of water were added to the kneader and stirred for 3 hours, then heated to 150 ° C for 2 hours, and then vacuumed for 2 hours. Pass through a three-roll mill to obtain base rubber.

[0046] 2. Take 100 parts of base glue, add 15 parts of vinyl-terminated silicone oil with a viscosity of 10000mpa.s, 1.5 parts of tackifier and 0.5 parts of platinum catalyst (vinyl chromium compound 2000ppm) and stir in a planetary mixer at 30rpm for 1h until uniform Get A component.

[0047] 3. Stir 70 parts of vinyl-terminated silicone oil with a viscosity of 2000mpa.s, 30 parts of hydrogen-containing silicone oil (0.8% hydrogen content) and 0.4 part of inhibitor 1-ethynyl cyclohexanol in a high-s...

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Abstract

The invention belongs to the technical field of silicone rubber and particularly relates to double-component addition-type liquid silicone rubber as well as a preparation method of same. The liquid silicone rubber is prepared by mixing, curing and shaping a component A and a component B, wherein the component A includes 100 parts of basic rubber, 8-18 parts of vinyl-terminated silicone oil, 1-2 parts of a tackifier, and 0.5 parts of a platinum catalyst; the component B includes: 20-70 parts of vinyl-terminated silicone oil, 30-80 parts of hydrogen-containing silicone oil, and 0.3-0.5 parts ofan inhibitor; the basic rubber includes 100 parts of vinyl-terminated silicone oil, 5-10 parts of vinyl-terminated silicone oil having side-chain vinyl group, 40 parts of fumed silica, 10-15 parts ofa silazane processing agent, and 0-5 parts of a siloxane processing agent. In the liquid silicone rubber, the components are cooperated and are matched in reasonable ratio, so that firmness of the liquid silicone rubber on surfaces of fabrics is improved, and tensile strength and tearing strength of the silicone rubber are increased; the silicone rubber is high in vulcanization speed and high in production efficiency. The invention also provides a preparation method of the double-component addition-type liquid silicone rubber. The method is optimized in process and has simple operations.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber, specifically relates to a two-component addition type liquid silicone rubber, and also relates to a preparation method of the two-component addition type liquid silicone rubber. Background technique [0002] Addition-type liquid silicone rubber is an important type of silicone rubber, which refers to vinyl silicone oil (polysiloxane containing vinyl) and crosslinking agent hydrogen-containing silicone oil (polysiloxane containing silicon-hydrogen bond) on platinum Under the action of a catalyst, an elastomer with a three-dimensional network structure is formed through a hydrosilylation reaction at room temperature or under heating conditions. It has the advantages of high and low temperature resistance, electrical insulation, no by-products during curing, small thermal expansion coefficient, small shrinkage rate, non-toxic, tasteless, and non-corrosive. It is widely used in many fields su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09D183/05C09D7/61C09D7/63C09D7/65
Inventor 张启发宁颖
Owner 佛山市天宝利硅工程科技有限公司
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