Back to results
US 4,546,018 AGranted
Coating composition and primer
AssigneeToray Silicone Company, Ltd.
InventorsMikami Ryuzo, Katsuyoshi Nakasuji
Life of this patent
Estimating the term…
Abstract
What is disclosed is a new and novel primer composition comprising a silicone modified epoxy resin and an organotitanium acid ester. These compositions are useful for priming solid substrates to allow the adherence of room temperature cured silicone rubber to the substrate. The compositions are also useful as protective coatings.
Claims21
A method of bonding a room temperature curable rubber coating to a solid substrate which comprises
- (I) contacting a solid substrate with a room temperature curable primer composition comprising
- (A) 100 parts by weight of a silicone modified epoxy resin which contains both epoxy groups and silicon-bonded alkoxy groups wherein the modified epoxy resin is obtained by contacting and reacting
- (a) a compound having the unit formula ##EQU3## wherein R is a substituted or unsubstituted monovalent hydrocarbon radical, X is an alkoxy radical having the formula R'O-- wherein R' is an alkyl radical of 1 to 4 carbon atoms or the radical R.sup.2 OR.sup.3 -- wherein R.sup.2 is an alkyl radical of 1 to 4 carbon atoms and R.sup.3 is a divalent alkylene radical of 1 to 3 carbon atoms;
- a has a value of 0 to 2;
- b has a value of 1 to 4 and the sum of a+b has a value of 1 to 4, with
- (b) an epoxy resin containing at least one epoxy group and at least one hydroxy group per molecule;
- and
- (B) 0.1 to 100 parts by weight of an organotitanium acid ester, and
- (II) allowing said primer to air dry
- (III) surmounting the air dried primer with a room temperature curable rubber, and
- (IV) allowing the room temperature curable rubber to cure whereby the room temperature curable rubber is bonded to the solid substrate.
8 more elements
A method of bonding a room temperature curable rubber coating to a solid substrate which comprises
- (I) contacting a solid substrate with a room temperature curable primer composition comprising
- (A) 100 parts by weight of a silicone modified epoxy resin which contains both epoxy groups and silicon-bonded alkoxy groups wherein the modified epoxy resin is obtained by contacting and reacting
- (a) a compound having the unit formula ##EQU4## wherein R is a substituted or unsubstituted monovalent hydrocarbon radical, X is an alkoxy radical having the formula R'O-- wherein R' is an alkyl radical of 1 to 4 carbon atoms or the radical R.sup.2 OR.sup.3 -- wherein R.sup.2 is an alkyl radical of 1 to 4 carbon atoms and R.sup.3 is a divalent alkylene radical of 1 to 3 carbon atoms;
- a has a value of 0 to 2;
- b has a value of 1 to 4 and the sum of a+b has a value of 1 to 4, with
- (b) an epoxy resin containing at least one epoxy group and at least one hydroxy group per molecule;
- and
- (B) 0.1 to 100 parts by weight of an organotitanium acid ester, and
- (II) allowing said primer to cure;
- (III) surmounting the cured primer with a room temperature curable rubber, and
- (IV) allowing the room temperature curable rubber to cure whereby the room temperature curable rubber is bonded to the solid substrate.
8 more elements
A method of bonding a room temperature curable rubber coating to a solid substrate which comprises
- (I) contacting a solid substrate with a room temperature curable primer composition comprising
- (A) 100 parts by weight of a silicone modified epoxy resin which contains both epoxy groups and silicon-bonded alkoxy groups wherein the modified epoxy resin is obtained by contacting and reacting
- (a) a compound having the unit formula ##EQU5## wherein R is a substituted or unsubstituted monovalent hydrocarbon radical, X is an alkoxy radical having the formula R'O-- wherein R' is an alkyl radical of 1 to 4 carbon atoms or the radical R.sup.2 OR.sup.3 -- wherein R.sup.2 is an alkyl radical of 1 to 4 carbon atoms and R.sup.3 is a divalent alkylene radical of 1 to 3 carbon atoms;
- a has a value of 0 to 2;
- b has a value of 1 to 4 and the sum of a+b has a value of 1 to 4, with
- (b) an epoxy resin containing at least one epoxy group and at least one hydroxy group per molecule;
- and
- (B) 0.1 to 100 parts by weight of an organotitanium acid ester, and
- (II) allowing said primer to air dry;
- (III) curing said primer;
- (IV) Surmounting the cured primer with a room temperature curable rubber, and
- (V) allowing the room temperature curable rubber to cure whereby the room temperature curable rubber is bonded to the solid substrate.
9 more elements
Dependencies are inferred from the claim text.