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US 8,945,365 B2Granted
Electrodepositable coating compositions exhibiting resistance to cratering
AssigneePPG Industries Ohio, Inc.
InventorsEllor J. VanBuskirk, Joseph Swanger, Craig Wilson
Life of this patent
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Abstract
The present invention relates to electrodepositable coating compositions that produce cured coatings that exhibit resistance to cratering. The coating compositions include an active hydrogen-containing cationic salt group-containing polymer; and 0.1 to 20 percent by weight, based on the total weight of resin solids in the coating composition, of an ungelled acrylic polymer.
Claims21
An electrodepositable coating composition comprising:
- (a) an active hydrogen-containing cationic salt group-containing polymer;
- and
- (b) 0.1 to 20 percent by weight, based on the total weight of resin solids in the coating composition, of a cationic salt group-containing ungelled acrylic polymer, different from (a), that comprises a reaction product of an ethylenically unsaturated monomer composition comprising:
- (i) a hydroxy-functional ethylenically unsaturated monomer;
- (ii) at least 10 percent by weight, based on the total weight of the ethylenically unsaturated monomer composition, of an amine-functional ethylenically unsaturated monomer;
- (iii) 10 to 40 percent by weight, based on the total weight of the ethylenically unsaturated monomer composition, of an alkyl(meth)acrylate having at least 8 carbon atoms in the alkyl group;
- and at least one of:
- (iv) 1 to 20 percent by weight, based on the total weight of the ethylenically unsaturated monomer composition, of an alkyl(meth)acrylate having less than 8 carbon atoms in the alkyl group, and
- (v) 1 to 30 percent by weight, based on the total weight of the ethylenically unsaturated monomer composition, of a vinyl aromatic monomer.
6 more elements
An electrodepositable coating composition comprising:
- (a) an active hydrogen-containing cationic salt group-containing polymer;
- and
- (b) 0.1 to 20 percent by weight, based on the total weight of resin solids in the coating composition, of a cationic salt group-containing ungelled acrylic polymer, different from (a), that comprises a reaction product of an ethylenically unsaturated monomer composition comprising:
- (i) a hydroxy-functional ethylenically unsaturated monomer;
- (ii) at least 10 percent by weight, based on the total weight of the ethylenically unsaturated monomer composition, of an amine-functional ethylenically unsaturated monomer;
- and
- (iii) an alkyl(meth)acrylate having at least 8 carbon atoms in the alkyl group;
- wherein the ethylenically unsaturated monomer composition comprises less than 1 percent by weight, based on the total weight of the ethylenically unsaturated monomer composition, of an ether group containing ethylenically unsaturated monomer.
5 more elements
An electrodepositable coating composition comprising:
- (a) an active hydrogen-containing cationic salt group-containing polymer;
- and
- (b) 0.1 to 20 percent by weight, based on the total weight of resin solids in the coating composition, of an adduct of reactants comprising:
- (i) an at least partially unblocked isocyanate;
- and
- (ii) an active hydrogen-containing ungelled acrylic polymer having a calculated glass transition temperature of no more than 40° C.
3 more elements
Dependencies are inferred from the claim text.