Cationic electrodepositable coating composition and coating method using the same
US5824424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1998 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jan 12, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31522
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a cationic electrodepositable coating composition comprising: PA1 I! a polyurethane-modified epoxy resin-amine adduct obtained by a reaction of: PA2 (A) a polyurethane compound having one terminal isocyanate group in the molecule, obtained by a reaction of (a) a polyhydroxy compound having a number-average molecular weight of 50-8,000, (b) a polyisocyanate compound, and (c) a compound having one active hydrogen atom in the molecule, PA2 (B) a bisphenol type epoxy resin having at least two epoxy groups in the molecule, and PA2 (C) an active-hydrogen-containing amine compound, and II! a nonionic film-forming resin. This composition can form a coating film having excellent weathering resistance and corrosion resistance and, when used in combination with an aqueous base coating and a powder coating (a top coat), can provide a coating system which is simple to apply, which can give a coating film very superior in appearance, corrosion resistance, weathering resistance, chipping resistance, etc., and which contributes to resource saving and reduced public hazard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.