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US 5,356,549 AGranted
Silicone grease
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTakayuki Takahashi, Motohiko Hirai
Life of this patent
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Abstract
Silicone grease comprising (A) an amino-modified silicone fluid having an amine equivalent of 10,000 to 200,000 g/mol and a viscosity of 10 to 100,000 cs at 25.degree. C., and (B) a thickener exhibits improved heat resistance and low-temperature resistance.
Claims18
A silicone grease comprising
- (A) an amino-modified silicone fluid of the formula (1);
- R.sub.a.sup.1 R.sub.b.sup.2 SiO.sub.(4-a-b)/2 ( 1),
- wherein R.sup.1 is a group of the formula:
- --R.sup.3 --NH.sub.2 or --R.sup.3 --NHR.sup.4 --NH.sub.2 wherein R.sup.3 and R.sup.4 are independently alkylene groups having 1 to 8 carbon atoms,
- R.sup.2 is a halogen substituted or unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms,
- letters a and b are positive numbers in the range:
- 0.0001.ltoreq.a.ltoreq.0.01 and 1.95.ltoreq.a+b.ltoreq.2.20, said silicone fluid having an amine equivalent of 10,000 to 200,000 g/mol and a viscosity of 10 to 100,000 centistokes at 25.degree. C., and
- (B) a thickener in amounts sufficient to provide a silicone grease.
5 more elements
A silicone grease consisting essentially of
- (A) an amino-modified silicone fluid of the formula (1);
- R.sub.a.sup.1 R.sub.b.sup.2 SiO.sub.(4-a-b)/2 ( 1),
- wherein R.sup.1 is a group of the formula:
- --R.sup.3 --NH.sub.2 or --R.sup.3 --NHR.sup.4 --NH.sub.2 wherein R.sup.3 and R.sup.4 are independently alkylene groups having 1 to 8 carbon atoms,
- R.sup.2 is a halogen substituted or unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms,
- letters a and b are positive numbers in the range:
- 0.0001.ltoreq.a.ltoreq.0.01 and 1.95.ltoreq.a+b.ltoreq.2.20, said silicone fluid having an amine equivalent of 10,000 to 200,000 g/mol and a viscosity of 10 to 100,000 centistokes at 25.degree. C., and
- (B) a thickener.
5 more elements
Dependencies are inferred from the claim text.