Reactive coatings comprising an acid-functional compound, an anhydride-functional compound, an epoxy-functional compound and a hydroxy-functional compound
AssigneeThe Sherwin-Williams Company
InventorsMohamad D. Shalati, James A. Marquart
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Abstract
Curable compositions which comprise: (i) an acid-functional compound having an average of at least two carboxylic acid groups per molecule; and (ii) an anhydride-functional compound having an average of at least two cyclic carboxylic acid anhdyride groups per molecule; and (iii) an epoxy-functional compound having an average of at least one epoxy group per molecule; and (iv) a hydroxy-functional compound having an average of at least two hydroxyl groups per molecule; wherein at least one of the compounds (i), (ii), (iii) or (iv) comprises a film forming polymer.
Claims37
A multicomponent curable composition, which is reactive upon mixing of the components, and which comprises:
- (i) an acid-functional polymer having an average of at least two carboxylic acid groups per molecule wherein the acid-functional polymer is obtained by the half-ester reaction of a hydroxy-functional polymer and at least one cyclic anhydride having one anhydride group per molecule to form acid groups and ester groups;
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- (ii) an anhydride-functional compound having an average of at least two cyclic carboxylic acid anhydride groups per molecule;
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- (iii) an epoxy-functional compound having an average of at least one epoxy group per molecule;
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- (iv) a hydroxy-functional compound which is different from epoxy-functional compound (iii) and which has an average of at least two hydroxyl groups per molecule;
- wherein at least one of the compounds (i), (ii), (iii) or (iv) comprises a film forming polymer.
A curable composition which comprises:
- (i) an acid-functional polymer having an average of at least two carboxylic acid groups per molecule and wherein the polymer is obtained by the half-ester reaction of a hydroxy-functional polymer with a cyclic carboxylic acid anhydride;
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- (ii) an anhydride-functional polymer having an average of at least two cyclic carboxylic acid anhydride groups per molecule and wherein the anhydride-functional polymer is the addition polymerization reaction product of (a) 5 to about 40 weight percent of an ethylenically unsaturated monoanhydride and (b) 60 to about 95 weight percent of at least one other ethylenically unsaturated monomer copolymerizable with the ehtylenically unsaturated anhydride;
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- (iii) an epoxy-functional compound having an average of at least two cycloaliphatic epoxy groups per molecule;
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- (iv) a hydroxy-functional polymer having an average of at least two hydroxyl groups per molecule.
Dependencies are inferred from the claim text.