Aqueous binder dispersions intended for cathodic electrocoat materials and comprising a crosslinker based on 2,2-dimethyl-1,3-dioxolane-4-methanol-blocked polyisocyanates

US10501646B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Guenther Ott · Munster, DE
• Markus Oberhoff · Speyer, DE
• Silke Przybilla · Münster, DE
• Karl-Heinz Grosse Brinkhaus · Nottuln, DE
• Dominik Stoll · Munster, DE

Key dates

• Filing date: Jul 31, 2015
• Grant date: Dec 10, 2019
• Expiry date: Nov 30, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D13/22
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to aqueous binder dispersions for cationic electrocoat materials, comprising as binders amine-modified, hydroxy-functional epoxy resins and comprising as crosslinker at least one fully blocked polyisocyanate blocked at least partly with 2,2-dimethyl-1,3-dioxolane-4-methanol, and also to the use of such cationic electrocoat materials for producing coating systems and to the use of crosslinkers based on polyisocyanates blocked with 2,2-dimethyl-1,3-dioxolane-4-methanol in aqueous binder dispersions.