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US 5,290,601 AGranted
Coating composition
AssigneeCourtaulds Coatings (Holdings) Limited
InventorsRodney R. Brooks, Michael J. Winter
Life of this patent
Estimating the term…
Abstract
A primer composition for application to a substrate to promote adhesion of a room-temperature-vulcanizable silicone rubber coating, comprises (A) an aminosilane material, (B) a chlorinated polyolefin and (C) a room-temperature-curable polydiorganosiloxane. The aminosilane material (A) is a primary amine-functional silane or the reaction product of a primary amine-functional silane with an epoxy-functional silane or an alpha, omega-dihydroxypolydimethylsiloxane oil.
Claims19
A primer composition for application to a substrate to promote adhesion of a room-temperature-vulcanisable silicone rubber coating, which primer composition comprises:
- (A) an amino-substituted silicon compound which is selected from the group consisting of:
- (i) primary amine-functional silanes of the formula:
- (RO).sub.x R.sub.(3-x) SiR.sup.1 NHR.sup.2 (I)
- where the radicals R, which can be the same or different, are monovalent hydrocarbon radicals having 1 to 12 carbon atoms and optionally containing an ether linkage;
- R.sup.1 is an alkylene radical having 2 to 4 carbon atoms or a divalent aliphatic ether radical having 3 to 8 carbon atoms;
- R.sup.2 is hydrogen or a (primary amino)-alkyl group having 2 to 4 carbon atoms;
- and x is 2 or 3;
- (ii) reaction products of a primary amine-functional silane of the formula (I) with an epoxy-functional silane of the formula:
- A-- Si(B).sub.a (OB).sub.(3-a) (II)
- where A is an epoxide-substituted monovalent hydrocarbon radical having 4 to 12 carbon atoms;
- the radicals B, which can be the same or different, are alkyl radicals having 1 to 4 carbon atoms;
- and a is 0 or 1;
- and
- (iii) reaction products of a primary amine-functional silane of the formula (I) with an alpha, omega-dihydroxypolydimethylsiloxane oil of formula:
- HO(Si(CH.sub.3).sub.2 O).sub.y H (III)
- in which y is 2 to 60;
- (B) a chlorinated polyolefin;
- and
- (C) a polydiorganosiloxane composition which is self-curable or moisture-curable at ambient temperature.
16 more elements
A process for preparing a pigmented primer composition comprising dispersing a pigment in a non-reactive polydiorganosiloxane oil and mixing the resulting pigment dispersion with:
- (A) an amino-substituted silicon compound which is selected from the group consisting of
- (i) primary amine-functional silanes of the formula:
- (RO).sub.x R.sub.(3-x) SiR.sup.1 NHR.sup.2 (I)
- where the radicals R, which can be the same or different, are monovalent hydrocarbon radicals having 1 to 12 carbon atoms and optionally containing an ether linkage;
- R.sup.1 is an alkylene radical having 2 to 4 carbon atoms or a divalent aliphatic ether radical having 3 to 8 carbon atoms;
- R.sup.2 is hydrogen or a (primary amino)-alkyl group having 2 to 4 carbon atoms;
- and x is 2 or 3;
- (ii) reaction products of a primary amine-functional silane of the formula (I) with an epoxy-functional silane of the formula:
- A-- Si(B).sub.a (OB).sub.(3-a) (II)
- where A is an epoxide-substituted monovalent hydrocarbon radical having 4 to 12 carbon atoms;
- the radicals B, which can be the same or different, are alkyl radicals having 1 to 4 carbon atoms;
- and a is 0 or 1;
- and
- (iii) reaction products of a primary amine-functional silane of the formula (I) with an alpha, omega-dihydroxypolydimethylsiloxane oil of formula:
- HO(Si(CH.sub.3).sub.2 O).sub.y H (III)
- in which y is 2 to 60;
- (B) a chlorinated polyolefin;
- and
- (C) a polydiorganosiloxane composition which is self-curable or moisture-curable at ambient temperature,
- said step of dispersing the pigment in a non-reactive polydiorganosiloxane oil being carried out before the pigment contacts the amino-substituted silicon compound (A) or the polydiorganosiloxane composition (C).
17 more elements
A process for preparing a pigmented primer composition comprising dispersing a pigment in a liquid hydroxyl-terminated polydiorganosiloxane and mixing the resulting pigment dispersion with
- (A) an amino-substituted silicon compound which is selected from the group consisting of
- (i) primary amine-functional silanes of the formula:
- (RO).sub.x R.sub.(3-x) SiR.sup.1 NHR.sup.2 (I)
- where the radicals R, which can be the same or different, are monovalent hydrocarbon radicals having 1 to 12 carbon atoms and optionally containing an ether linkage;
- R.sup.1 is an alkylene radical having 2 to 4 carbon atoms or a divalent aliphatic ether radical having 3 to 8 carbon atoms;
- R.sup.2 is hydrogen or a (primary amino)-alkyl group having 2 to 4 carbon atoms and x is 2 or 3;
- (ii) reaction products of a primary amine-functional silane of the formula (I) with an epoxy-functional silane of the formula:
- A-- Si(B).sub.a (OB).sub.(3-a) (II)
- where A is an epoxide-substituted monovalent hydrocarbon radical having 4 to 12 carbon atoms;
- the radicals B, which can be the same or different, are alkyl radicals having 1 to 4 carbon atoms;
- and a is 0 or 1;
- and
- (iii) the reaction products of a primary amine-functional silane of the formula (I) with an alpha, omega-dihydroxypolydimethylsiloxane oil of the formula:
- HO(Si(CH.sub.3).sub.2 O).sub.y H (III)
- in which y is 2 to 60;
- (B) a chlorinated polyolefin;
- and
- (C) a polydiorganosiloxane composition which is self-curable or moisture-curable at ambient temperature,
- said step of dispersing the pigment in a liquid hydroxyl-terminated polydiorganosiloxane being carried out before the pigment contacts the amino-substituted silicon compound (A) or any curing agent or material containing silicon-bonded hydrolysable groups which forms part of the polydiorganosiloxane (C).
16 more elements
A process for preparing a pigmented primer composition comprising dispersing a pigment in a liquid hydroxyl-terminated polydiorganosiloxane and mixing the resulting pigment dispersion with
- (A) an amino-substituted silicon compound which is selected from the group consisting of
- (i) primary amine-functional silanes of the formula:
- (RO).sub.x R.sub.(3-x) SiR.sup.1 NHR.sup.2 (I)
- where the radicals R, which can be the same or different, are monovalent hydrocarbon radicals having 1 to 12 carbon atoms and optionally containing an ether linkage;
- R.sup.1 is an alkylene radical having 2 to 4 carbon atoms or a divalent aliphatic ether radical having 3 to 8 carbon atoms;
- R.sup.2 is hydrogen or a (primary amino)-alkyl group having 2 to 4 carbon atoms and x is 2 or 3;
- (ii) reaction products of a primary amine-functional silane of the formula (I) with an epoxy-functional silane of the formula:
- A-- Si(B).sub.a (OB).sub.(3-a) (II)
- where A is an epoxide-substituted monovalent hydrocarbon radical having 4 to 12 carbon atoms;
- the radicals B, which can be the same or different, are alkyl radicals having 1 to 4 carbon atoms;
- and a is 0 or 1;
- and
- (iii) reaction products of a primary amine-functional silane of the formula (I) with an alpha, omega-dihydroxypolydimethylsiloxane oil of the formula:
- HO(Si(CH.sub.3).sub.2 O).sub.y H (III)
- in which y is 2 to 60;
- (B) a chlorinated polyolefin;
- and
- (C) a curing agent which together with the liquid hydroxyl-terminated polydiorganosiloxane forms the room-temperature-curable polydiorganosiloxane (C),
- said step of dispersing the pigment in a liquid hydroxyl-terminated polydiorganosiloxane being carried out before the pigment contacts the amino-substituted silicon compound (A) or the said curing agent.
16 more elements
A process for coating a substrate with a room-temperature-vulcanisable silicone rubber composition, wherein the substrate is coated with a primer composition which comprises:
- (A) an amino-substituted silicon compound which is selected from the group consisting of
- (i) primary amine-functional silanes of the formula:
- (RO).sub.x R.sub.(3-x) SiR.sup.1 NHR.sup.2 (I)
- where the radicals R, which can be the same or different, are monovalent hydrocarbon radicals having 1 to 12 carbon atoms and optionally containing an ether linkage;
- R.sup.1 is an alkylene radical having 2 to 4 carbon atoms or a divalent aliphatic ether radical having 3 to 8 carbon atoms;
- R.sup.2 is hydrogen or a (primary amino)-alkyl group having 2 to 4 carbon atoms;
- and x is 2 or 3;
- (ii) reaction products of a primary amine-functional silane of the formula (I) with an epoxy-functional silane of the formula:
- A-- Si(B).sub.a (OB).sub.(3-a) (II)
- where A is an epoxide-substituted monovalent hydrocarbon radical having 4 to 12 carbon atoms;
- the radicals B, which can be the same or different, are alkyl radicals having 1 to 4 carbon atoms;
- and a is 0 or 1;
- and
- (iii) reaction products of a primary amine-functional silane of the formula (I) with an alpha, omega-dihydroxypolydimethylsiloxane oil of formula:
- HO(Si(CH.sub.3).sub.2 O).sub.y H (III)
- in which y is 2 to 60;
- (B) a chlorinated polyolefin;
- and
- (C) a polydiorganosiloxane composition which is self-curable or moisture-curable at ambient temperature;
- and
- the room-temperature-vulcanisable silicone rubber composition is applied over the said primer composition.
18 more elements
Dependencies are inferred from the claim text.