Waterbased methylol (meth)acrylamide acrylic polymer and an acrylic hydrosol coating composition

Patent 5266406 Issued on November 30, 1993. Estimated Expiration Date:

January 11, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Water-dilutable coating compositions for base coats for wet-on-wet application of clear coat on base coat Patent #: 4730020
Issued on: 03/08/1988
Inventor: Wilfinger , et al.

Inventors

Assignee

E. I. Du Pont de Nemours and Company

Application

No. 002992 filed on 01/11/1993

US Classes:

428/423.1, Of polyamidoester (polyurethane, polyisocyanate, polycarbamate, etc.)428/424.4, Ester monomer type (polyvinylacetate, etc.)428/463Ester, halide or nitrile of addition polymer

Examiners

Primary: Schofer, Joseph L.
Assistant: Smith, Jerry

Attorney, Agent or Firm

Fricke; Hilmar L.

International Class

B32B 027/00

Abstract

A waterbased coating composition formed of an acrylic latex and an acrylic hydrosol dispersed in an aqueous carrier and has a pH of about 7-10; wherein the binder is a blend of an acrylic latex polymer having a particle size of about 0.06-0.20 microns and an acrylic hydrosol polymer having a particle size of less than 0.30 microns; wherein the blend containsa methylol (meth)acrylamide acrylic latex polymer of polymerized monomers of alkyl methacrylate, alkyl acrylate or mixtures thereof, 1-15% by weight of methylol methacrylamide, methylol acrylamide or mixtures thereof, 0.5-10% by weight of ethylenically unsaturated carboxylic acid having reactive carboxyl groups, 0.5-10% by weight of ethylenically unsaturated hydroxyl monomer and the carboxyl groups of the carboxylic acid component of the polymer are reacted with ammonia or an amine; and an acrylic hydrosol polymer of methylol (meth)acrylamide acrylic polymer containing about 0.5-10% by weight of an ethylenically unsaturated carboxylic acid, 0.5-10% by weight of ethylenically unsaturated hydroxyl monomer and the carboxyl groups of the carboxylic acid of the polymer are reacted with ammonia or an amine;the composition forms an automotive quality clear coat and/or pigmented color coat and the acrylic hydrosol polymer can be used to form an automotive quality sealer composition.