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US 6,274,648 B1Granted
Hollow filler-containing silicone rubber composition
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsNoriyuki Meguriya, Shinichi Ide
Life of this patent
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Abstract
A hollow filler-containing silicone rubber composition comprising 100 parts by weight of a curable organopolysiloxane composition and 0.1-20 parts by weight of a hollow filler in the form of microballoons having a mean particle size of 10-200 μm and an elasticity of at least 10% is injection molded into a cured silicone rubber part having improved shock-absorbing properties and compression properties as well as weather resistance, freeze resistance and heat resistance inherent to silicone rubber.
Claims11
A hollow filler-containing silicone rubber composition comprising
- (1) 100 parts by weight of an organopolysiloxane having on the average at least two alkenyl radicals in a molecule and an average degree of polymerization of up to 1,200,
- (2) 0.1 to 50 parts by weight of an organohydrogen-polysiloxane of the following average compositional formula (2):
- RbHcSiO(4-b-c)/2
- wherein R is a substituted or unsubstituted monovalent hydrocarbon radical of 1 to 10 carbon atoms,
- (3) a catalytic amount of an addition reaction catalyst, and
- (4) 0.5 to 10 parts by weight of a hollow filler in the form of microballoons having a mean particle size of 30 to 60 μm and an elasticity of at least 10%.
3 more elements
Dependencies are inferred from the claim text.