Cathodically depositable paint binders and process for producing

Details Cathodically depositable paint binders and process for producing Cathodically depositable paint binders and process for producing

1980-03-31

1981-07-14

Nielsen, Earl A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

204181C, 260 292TN, 525507, 528 45, 528 73, C08G 1880, C08G 5914

Patent

active

042785804

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.

REFERENCES:
patent: 3922253 (1975-11-01), Jerabek et al.
patent: 3928156 (1975-12-01), Wismer et al.
patent: 3984299 (1976-10-01), Jerabek
patent: 4031050 (1977-06-01), Jerabek
patent: 4036795 (1977-07-01), Tominaga
patent: 4134866 (1979-01-01), Tominaga et al.

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