The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2009
Filed:
Mar. 14, 2006
James C. Drescher, Portage, IN (US);
Michael L. Jackson, LaGrange, IL (US);
Lisa M. Muller, Palos Heights, IL (US);
Frank A. Stubbs, Schererville, IN (US);
Robert D. Tokash, Portage, IN (US);
James C. Drescher, Portage, IN (US);
Michael L. Jackson, LaGrange, IL (US);
Lisa M. Muller, Palos Heights, IL (US);
Frank A. Stubbs, Schererville, IN (US);
Robert D. Tokash, Portage, IN (US);
Nippon Paint (USA), Inc., Teaneck, NJ (US);
Abstract
The present invention provides reactive aqueous or solvent borne compositions comprising one or more low-temperature curing alkylether functional aminoplast resins having an average degree of polymerization of from 1.0 to 2.0, preferably alkylether group containing melamines, one or more hydroxyl group containing resins or polymers, such as acrylics and polyesters, one or more unblocked acid catalysts each having a pKa of 0.25 to 1.0, such as organic sulfonic acids, and one or more volatile amines, e.g. N-dipropylamine, that have a relative evaporation rate (RER) of 50-500, wherein, RER equals (p)(M)/11.6, with p being the vapor pressure of the amine in mm Hg and M being the molecular weight of the amine. The compositions cure at from 60° C. to 135° C., e.g. below 105° C., to form durable coatings suitable for plastic substrates, such as automotive plastics. The present invention also provides methods of forming the compositions comprising mixing the said aminoplast resins, hydroxyl group containing resins or polymers, unblocked acids and volatile amines to form a mixture, wherein the acids and the amines are added separately into the mixture.