Back to results
US 4,233,428 AGranted
Primer compositions for silicone rubber compositions
AssigneeGeneral Electric Company
InventorIsao Endo
Life of this patent
Estimating the term…
Abstract
A primer composition for silicone rubber compositions comprising an epoxy resin, an amine functional silane, an aminoxy functional silane, or siloxane, a mercapto functional silane, and an organic solvent. Such primer compositions are especially used as primer compositions for aminoxy curing room temperature vulcanizable silicone rubber compositions.
Claims18
A primer composition for a silicone rubber composition comprising,
- (a) 100 parts by weight of epoxy resin containing more than 2 radicals expressed by the formula ##STR10## within each molecule;
- (b) from 50 to 500 parts by weight of a silane containing an amino group expressed by the formula R.sup.1 CH.sub.2 CH.sub.2 CH.sub.2 Si(OR.sup.2).sub.3 wherein R.sup.1 is a nitrogen-containing group selected from the class consisting of substituted or unsubstituted amino groups expressed by Q.sub.2.sup.1 N and Q.sub.2.sup.2 N(CH.sub.2).sub.2 NH wherein Q.sup.1 and Q.sup.2 are groups selected from the class consisting of a hydrogen atom and an alkyl radical respectively, and R.sup.2 is a monovalent hydrocarbon group;
- (c) from 30 to 500 parts by weight of an organic silicon compound containing the group expressed by the formula R.sub.2.sup.3 NOSi.tbd. wherein R.sup.3 is a group selected from the class consisting of a hydrogen atom and a monovalent hydrocarbon group with no aliphatic unsaturation;
- (d) from 100 to 1000 parts by weight of a mercapto-containing silane expressed by the formula HS(CH.sub.2).sub.a Si(OR.sup.4).sub.3 wherein a has a value of either 2 or 3, and R.sup.4 is a monovalent hydrocarbon group;
- and
- (e) an organic solvent.
3 more elements
A process for forming a primer composition for silicone rubber compositions comprising mixing
- (a) 100 parts by weight of epoxy resin containing more than 2 radicals expressed by the formula ##STR14## within each molecule;
- (b) from 50 to 500 parts by weight of a silane containing an amino group expressed by the formula R.sup.1 CH.sub.2 CH.sub.2 CH.sub.2 Si(OR.sup.2).sub.3 wherein R.sup.1 is a nitrogen-containing group selected from the class consisting of substituted or unsubstituted amino groups expressed by Q.sub.2.sup.1 N and Q.sub.2.sup.2 N(CH.sub.2).sub.2 NH wherein Q.sup.1 and Q.sup.2 are groups selected from the class consisting of a hydrogen atom and an alkyl radical respectively, and R.sup.2 is a monovalent hydrocarbon group;
- (c) from 30 to 500 parts by weight of an organic silicon compound containing the group expressed by the formula R.sub.2.sup.3 NOSi.tbd. wherein R.sup.3 is a group selected from the class consisting of a hydrogen atom and a monovalent hydrocarbon group with no aliphatic unsaturation;
- (d) from 100 to 1000 parts by wweight of a mercapto-containing silane expressed by the formula HS(CH.sub.2).sub.a Si(OR.sup.4).sub.3 wherein a has a value of either 2 or 3, and R.sup.4 is a monovalent hydrocarbon group;
- and
- (e) an organic solvent.
3 more elements
Dependencies are inferred from the claim text.