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US 6,641,923 B2Granted
Weldable coating compositions having improved intercoat adhesion
AssigneePPG Industries Ohio, Inc.
InventorsRichard J. Sadvary, Lawrence G. Anderson, Sherry M. Gaggini, Dennis W. Jones
Life of this patent
Estimating the term…
Abstract
A weldable curable coating composition with improved intercoat adhesion is disclosed comprising a resinous binder comprising a polymer (A) with functional groups and a crosslinking agent with functional groups reactive with those of polymer (A); an electroconductive pigment; and an adhesion promoting compound comprising boron containing compounds. In an alternative embodiment, the adhesion promoting compound may comprise siloxane polymer reacted with aluminates, titanates, zirconates, silicates, siloxanes, silanes, and mixtures thereof, wherein each component is different.
Claims65
A thermosetting coating composition comprising:
- (A) a resinous binder comprising:
- (1) at least one functional group-containing polymer, and
- (2) at least one curing agent having functional groups reactive with the functional groups of (1);
- (B) at least one electroconductive pigment dispersed in resinous binder (A), said pigment selected from at least one of zinc, ferrophosphorus, and tungsten;
- and
- (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof, wherein each component is different, and wherein said boron-containing compound comprises a reaction product formed from the following reactants:
- (1) at least one polysiloxane comprising at least one of the following structural units (I):
- R1nR2mSiO(4−n−m)/2 (I)
- wherein each R1 is independently selected from a monovalent hydrocarbon group or a siloxane group;
- each R2 independently is a group comprising OR′, where R′ is H or an alkyl group having 1 to 20 carbon atoms;
- and m and n each represent a positive number fulfilling the requirements of 0<m<4;
- 0<n<4;
- and 2≦(m+n)<4;
- and
- (2) a boron-containing compound selected from at least one of boric acid, boric acid equivalents, and mixtures thereof, wherein each component is different.
12 more elements
A thermosetting coating composition comprising:
- (A) a resinous binder comprising:
- (1) at least one epoxy group-containing polymer, and
- (2) at least one curing agent selected from a blocked isocyanate and an aminoplast resin;
- and
- (B) at least one electroconductive pigment selected from at least one of zinc, ferrophosphorus, and tungsten dispersed in resinous binder (A) such that the weight ratio of (B) to (A) is within the range of 1 to 6.0:1, and
- (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof, wherein the boron-containing compound (C) comprises a reaction product formed from the following reactants:
- (1) at least one polysiloxane comprising at least one of the following structural units (I):
- R1nR2mSiO(4−n−m)/2 (I)
- wherein each R1 is independently selected from a monovalent hydrocarbon group or a siloxane group;
- each R2 independently is a group comprising OR′, where R′ is H or an alkyl group having 1 to 20 carbon atoms;
- and m and n each represent a positive number fulfilling the requirements of 0<m<4;
- 0<n<4;
- and 2≦(m+n)<4;
- and
- (2) a boron-containing compound selected from at least one of boric acid, boric acid equivalents, and mixtures thereof, and wherein each component is different, the thermosetting coating composition being characterized such that when deposited and cured on said substrate, the cured coating is weldable.
12 more elements
A thermosetting coating composition comprising:
- (A) a resinous binder comprising:
- (1) at least one phosphatized epoxy group-containing polymer, and
- (2) at least one curing agent selected from at least one of a blocked isocyanate and an aminoplast resin;
- (B) at least one electroconductive pigment selected from at least one of zinc, ferrophosphorus, and tungsten dispersed in resinous binder (A) such that the weight ratio of (B) to (A) is within the range of 1.0 to 6.0:1, and
- (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof,
- wherein each component is different, the thermosetting coating composition being characterized such that when deposited and cured on said metal substrate, the cured coating is weldable.
3 more elements
A multilayer composite coating comprising a weldable primer coating formed over at least a portion of a substrate, the primer coating formed from a primer film-forming composition and a topcoat over at least a portion of the primer coating, the topcoat formed from a topcoat film-forming composition, wherein the primer film forming composition comprises:
- (A) a resinous binder comprising:
- (1) a functional group-containing polymer, and
- (2) a curing agent having functional groups reactive with the functional groups of (1);
- (B) an electroconductive pigment dispersed in resinous binder (A) such that the weight ratio of (B) to (A) is within the range of 0.5 to 9.0:1,the cured coating is weldable, and
- (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof, wherein the boron containing compound (C) of the primer film forming composition comprises the reaction product of the following reactants:
- (1) a polysiloxane comprising at least one of the following structural units (I):
- R1nR2mSiO(4−n−m)/2 (I)
- wherein each R1 is independently selected from a monovalent hydrocarbon group or a siloxane group;
- each R2 independently is a group comprising OR′, where R′ is H or an alkyl group having 1 to 20 carbon atoms;
- and m and n each represent a positive number fulfilling the requirements of 0<m<4;
- 0<n<4;
- and 2≦(m+n)<4;
- and
- (2) a boron-containing compound selected from at least one of boric acid, boric acid equivalents, and mixtures thereof, and wherein each component is different, the primer film forming coating composition being characterized such that when deposited and cured on said substrate, the cured coating is weldable.
11 more elements
A multilayer composite coating comprising a weldable primer coating formed over at least a portion of a substrate, the primer coating formed from a primer film-forming composition and a topcoat over at least a portion of the primer coating, the topcoat formed from a topcoat film-forming composition, wherein the primer film forming composition comprises:
- (A) a resinous binder comprising:
- (1) at least one epoxy group-containing polymer, and
- (2) at least one curing agent selected from a blocked isocyanate (and an aminoplast resin;
- (B) at least one electroconductive pigment dispersed in resinous binder (A) such that the weight ratio of (B) to (A) is within the range of 1.0 to 6.0:1;
- and
- (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof, wherein the boron-containing compound (C) comprises a reaction product formed from the following reactants:
- (1) at least one polysiloxane comprising at least one of the following structural units (I):
- R1nR2mSiO(4−n−m)/2 (I)
- wherein each R1 is independently selected from a monovalent hydrocarbon group or a siloxane group:
- each R2 independently is a group comprising OR′, where R′ is H or an alkyl group having 1 to 20 carbon atoms;
- and m and n each represent a positive number fulfilling the requirements of 0<m<4;
- 0<n<4;
- and 2≦(m+n)<4;
- and
- (2) a boron-containing compound selected from at least one of boric acid, boric acid equivalents, and mixtures thereof, and wherein each component is different, the primer film forming composition being characterized such that when deposited and cured on said substrate, the cured coating is weldable.
12 more elements
A multilayer composite coating comprising a weldable primer coating formed over at least a portion of a substrate formed from a primer film-forming composition and a topcoat over at least a portion of the primer coating from a topcoat film-forming composition, wherein the primer film forming composition comprises:
- (A) a resinous binder comprising:
- (1) at least one phosphatized epoxy group-containing polymer, and
- (2) at least one curing agent selected from at least one of blocked isocyanate and aminoplast resin;
- (B) at least one electroconductive pigment selected from at least one of zinc, ferrophosphorus, and tungsten dispersed in resinous binder (A) such that the weight ratio of (B) to (A) is within the range of 1.0 to 6.0:1, and
- (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof,
- wherein each component is different, the primer coating composition being characterized such that when deposited and cured on said substrate, the cured coating is weldable.
3 more elements
A thermosetting coating composition comprising:
- (A) a resinous binder comprising:
- (1) at least one functional group-containing polymer, wherein the functional group-containing polymer comprises a phosphatized epoxy group-containing polymer, and
- (2) at least one curing agent having functional groups reactive with the functional groups of (1);
- (B) at least one electroconductive pigment dispersed in resinous binder (A);
- and
- (C) at least one boric acid ester derivative selected from at least one of triethanolamine borate, mannitol borate, n-propanolamine borate, trimethylolpropane borate, glycerol borate, and mixtures thereof, wherein each component is different.
3 more elements
A thermosetting coating composition comprising:
- (A) a resinous binder comprising:
- (1) at least one functional group-containing polymer, wherein the functional group-containing polymer comprises a phosphatized epoxy group-containing polymer, and
- (2) at least one curing agent having functional groups reactive with the functional groups of (1);
- (B) at least one electroconductive pigment dispersed in resinous binder (A);
- and
- (C) at least one boron-containing compound comprising a reaction product formed from the following reactants:
- (1) at least one polysiloxane comprising at least one of the following structural units (I):
- R1nR2mSiO(4−n−m)/2 (I)
- wherein each R1 is independently selected from a monovalent hydrocarbon group or a siloxane group;
- each R2 independently is a group comprising OR′, where R′ is H or an alkyl group having 1 to 20 carbon atoms;
- and m and n each represent a positive number fulfilling the requirements of 0<m<4;
- 0<n<4 and 2≦(m+n)<4;
- and
- (2) a boron-containing compound selected from at least one of boric acid, boric acid equivalents, and mixtures thereof,
- wherein each component is different.
12 more elements
Dependencies are inferred from the claim text.