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:
Jul. 14, 1981
Filed:
Mar. 31, 1980
Vianova Kunstharz, A.G., Werndorf, AT;
Abstract
Cathodically depositable paint binders, water-soluble upon neutralization with acids, and the method of preparing the paint binders based on amine-epoxy adducts which crosslink at elevated temperature through polyurethane formation are described. The paint binders are prepared by reacting per mole of expoxide groups of a polymer having an epoxy equivalent of between about 180 and 1500 from about 3 to 70 mole percent of a polyisocyanate adduct having substantially no free NCO content and carrying per molecule at least one carboxyl group. Basic functionality is provided by reacting the epoxy-containing polymer, before or after reaction with the polyisocyanate adduct, with secondary aliphatic amines and/or alkanol amines. The binders, in addition to providing stable aqueous solutions when neutralized with an inorganic or organic acid, have good resistance to corrosion and solvents.