Weldable coating compositions having improved intercoat adhesion
First Claim
Patent Images
1. 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);
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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.
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Citations
65 Claims
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1. A thermosetting coating composition comprising:
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(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);
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 53, 54, 63, 64, 65)
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17. A thermosetting coating composition comprising:
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(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);
- View Dependent Claims (18, 19, 24, 25, 55, 56)
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20. A thermosetting coating composition comprising:
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(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. - View Dependent Claims (21, 22, 23)
(A) at least one polysiloxane comprising at least one of the following structural units (I);
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22. The thermosetting coating composition of claim 20, wherein the resinous binder (A) further comprises at least one catalyst selected from at least one of dibutyl tin dilaurate, dibutyl tin oxide, dibutyl tin diacetate, phosphoric acid, alkyl acid phosphate, and carboxylic acid.
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23. The thermosetting coating composition of claim 20 which further comprises a corrosion inhibitive pigment dispersed in resinous binder (A) such that the weight ratio of the corrosion inhibitive pigment to (A) is within the range of 0.1 to 0.7.
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26. 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:
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(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);
- View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. 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:
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(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);
- View Dependent Claims (45, 46, 51, 52)
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47. 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:
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(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. - View Dependent Claims (48, 49, 50)
(A) at least one polysiloxane comprising at least one of the following structural units (I);
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49. The multilayer coating composition of claim 47, wherein the resinous binder (A) further comprises at least one catalyst selected from dibutyl tin dilaureate, dibutyl tin oxide, dibutyl tin diacetate, phosphoric acid, alkyl acid phosphate, and carboxylic acid.
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50. The multilayer coating composition of claim 47, wherein the resinous binder (A) further comprises a corrosion inhibitive pigment dispersed in a resinous binder (A) such that the weight ratio of the corrosion inhibitive pigment to (A) is within the range of 0.1 to 0.7.
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57. A thermosetting coating composition comprising:
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(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.
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58. A thermosetting coating composition comprising:
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(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);
- View Dependent Claims (59, 60, 61, 62)
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Specification