Low-hardness high-tear-resistance self-lubricating addition type liquid silicone rubber, preparation method and application thereof
A technology of silicone rubber and silicone rubber composition, applied in the field of silicone rubber, can solve the problems of high hardness, inability to meet the requirements of cyclic plugging and use of automobile plug-in parts, damage and the like
Active Publication Date: 2020-06-19
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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Abstract
The invention discloses low-hardness high-tear-resistance self-lubricating addition type liquid silicone rubber, a preparation method and application thereof. The silicone rubber composition comprisesa component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 70 to 100 parts of a base rubber, 0.004 to 0.4 part of a Si-H addition catalyst and 2 to 22 parts of alkenyl-containing polysiloxane, the component B is prepared from the following raw materials in parts by weight: 70 to 100 parts of a base rubber, 2 to 10 parts of alkenyl-containing polysiloxane, 1 to 6 parts of hydrogen-containing silicone oil and 0.4 to 4 parts of a hydrogen-containing silicone resin, and the silicone rubber obtained after vulcanization molding has thehardness of 17-22 Sh.A, the tearing strength of larger than 35 KN.m<-1> and the tensile strength of larger than 8 Mpa. According to the high-tear-resistance self-lubricating liquid silicone rubber provided by the invention, the tear resistance of the liquid silicone rubber within the hardness range of 17-21 Sh.A is improved to 35 KN.m<-1>, and the high-tear-resistance self-lubricating liquid silicone rubber can be applied to the field of high-end automobile plug pieces.
Technology Topic
Silicone resinPolymer chemistry +8
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PUM
Property | Measurement | Unit |
Viscosity | 30.0 | mPa·s |
Tear strength | >= 35.0 | kN/m |
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