Thermosetting compositions, methods of coating and coated articles
First Claim
1. A thermosetting composition which comprises:
- (A) a compound having in the molecule two or more functional groups of the formula (I);
##STR9## wherein R1, R2 and R3 are each selected from the group consisting of a hydrogen atom and an organic group of 1 to 18 carbon atoms, R4 is an organic group of 1 to 18 carbon atoms, Y1 is selected from the group consisting of an oxygen atom and a sulfur atom and R3 and R4 are optionally bonded with each other to form a heterocyclic structure which comprises Y1 as the hetero atom component;
(B) a compound having in the molecule two or more reactive functional groups which can form chemical bond with the functional groups of the compound (A), the reactive functional groups are groups of at least one member selected from the group consisting of an epoxy group, an oxazoline group, a silanol group, an alkoxysilane group, a hydroxyl group, an amino group, an imino group, an isocyanate group, a blocked isocyanate group, a cyclocarbonate group, a vinyl ether group, a vinyl thioether group, an aminomethylol group, an alkylated aminomethylol group, an acetal group and a ketal group; and
(C) at least one inorganic oxide sol selected from the group consisting of an aluminum oxide sol, a silica sol which is surface-treated with a silane coupling agent, a zirconium oxide sol and an antimony oxide sol; and
optionally, (D) a thermal latent acid catalyst which is activated during curing of the composition by heating, the thermal latent acid catalyst is at least one member selected from the group consisting of a compound prepared by neutralizing a Bronsted acid or a Lewis acid with a Lewis base, a mixture of a Lewis acid and a trialkylphosphate, an ester of a sulfonic acid, an ester of phosphoric acid, an onium compound and a compound comprising (i) an epoxy group-containing compound, (ii) a sulfur atom-containing compound and (iii) a Lewis acid, and optionally (iv) a carboxylic acid, a carboxylic anhydride or a carboxylic acid and a carboxylic anhydride, andfurther comprising a solvent, said solvent consisting essentially of an organic solvent.
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Accused Products
Abstract
A thermosetting composition comprises (A) a compound having in the molecule two or more carboxyl groups blocked by a vinyl ether compound, a vinyl thioether compound or a hetero compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, (B) a compound having in the molecule two or more reactive functional groups which can form chemical bonds with the blocked carboxyl groups, and (C) a dispersing component of at least one inorganic oxide sol selected from the group consisting of aluminium oxide sol, silica sol, zirconium oxide sol and antimony oxide sol, and optionally (D) a thermal latent acid catalyst which is activated during curing the composition by heating. A method of coating and a coated article comprise applying the composition. The obtained paint film has excellent weathering resistance, stain resistance, stain-removing property, chemical resistance, moisture resistance and excellent appearance.
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Citations
14 Claims
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1. A thermosetting composition which comprises:
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(A) a compound having in the molecule two or more functional groups of the formula (I);
##STR9## wherein R1, R2 and R3 are each selected from the group consisting of a hydrogen atom and an organic group of 1 to 18 carbon atoms, R4 is an organic group of 1 to 18 carbon atoms, Y1 is selected from the group consisting of an oxygen atom and a sulfur atom and R3 and R4 are optionally bonded with each other to form a heterocyclic structure which comprises Y1 as the hetero atom component;(B) a compound having in the molecule two or more reactive functional groups which can form chemical bond with the functional groups of the compound (A), the reactive functional groups are groups of at least one member selected from the group consisting of an epoxy group, an oxazoline group, a silanol group, an alkoxysilane group, a hydroxyl group, an amino group, an imino group, an isocyanate group, a blocked isocyanate group, a cyclocarbonate group, a vinyl ether group, a vinyl thioether group, an aminomethylol group, an alkylated aminomethylol group, an acetal group and a ketal group; and (C) at least one inorganic oxide sol selected from the group consisting of an aluminum oxide sol, a silica sol which is surface-treated with a silane coupling agent, a zirconium oxide sol and an antimony oxide sol; and
optionally, (D) a thermal latent acid catalyst which is activated during curing of the composition by heating, the thermal latent acid catalyst is at least one member selected from the group consisting of a compound prepared by neutralizing a Bronsted acid or a Lewis acid with a Lewis base, a mixture of a Lewis acid and a trialkylphosphate, an ester of a sulfonic acid, an ester of phosphoric acid, an onium compound and a compound comprising (i) an epoxy group-containing compound, (ii) a sulfur atom-containing compound and (iii) a Lewis acid, and optionally (iv) a carboxylic acid, a carboxylic anhydride or a carboxylic acid and a carboxylic anhydride, andfurther comprising a solvent, said solvent consisting essentially of an organic solvent. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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4. A thermosetting composition which comprises:
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(E) a self-crosslinkable compound having in the molecule (α
) one or more functional groups of the formula (2);
##STR10## wherein R5, R6 and R7 are each selected from the group consisting of a hydrogen atom and an organic group of 1 to 18 carbon atoms, R8 is an organic group of 1 to 18 carbon atoms, Y2 is selected from the group consisting of an oxygen atom and a sulfur atom and R7 and R8 are optionally bonded with each other to form a heterocyclic structure which comprises Y2 as the hetero atom component; and
(μ
) one or more reactive functional groups which can form chemical bonds with the functional groups (α
); and(C) at least one inorganic oxide sol selected from the group consisting of an aluminum oxide sol, a silica sol which is surface-treated with a silane coupling agent, a zirconium oxide sol and an antimony oxide sol; and
optionally, (A) a compound having in the molecule two or more functional groups of the formula (1);
##STR11## wherein R1, R2 and R3 are each selected from the group consisting of a hydrogen atom and an organic group of 1 to 18 carbon atoms, R4 is an organic group of 1 to 18 carbon atoms, Y1 is selected from the group consisting of an oxygen atom and a sulfur atom and R3 and R4 are optionally bonded with each other to form a heterocyclic structure which comprises Y1 as the hetero atom component; and
/or (B) a compound having in the molecule two or more reactive functional groups which can form chemical bonds with either one or both of the functional group of the formula (2) and the functional group of the formula (1); and
(D) a thermal latent acid catalyst which is activated during curing of the composition by heating, the thermal latent acid catalyst is at least one member selected from the group consisting of a compound prepared by neutralizing a Bronsted acid or a Lewis acid with a Lewis base, a mixture of a Lewis acid and a trialkylphosphate, an ester of a sulfonic acid, an ester of phosphoric acid, an onium compound, and a compound comprising (i) an epoxy group-containing compound, (ii) a sulfur atom-containing compound and (iii) a Lewis acid, and optionally (iv) a carboxylic acid, a carboxylic anhydride or a carboxylic acid and a carboxylic anhydride, wherein the reactive functional groups of said (E) and optionally said (B) are groups of at least one member selected from the group consisting of an epoxy group, an oxazoline group, a silanol group, an alkoxysilane group, a hydroxyl group, an amino group, an imino group, an unblocked isocyanate group, a blocked isocyanate group, a cyclocarbonate group, a vinyl ether group, a vinyl thioether group, an aminomethylol group, an alkylated aminomethylol group, an acetal group and a ketal group, andfurther comprising a solvent, said solvent consisting essentially of an organic solvent.
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Specification