Aqueous coating composition and coating method using same
US4948829A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 5, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | May 5, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are (1) an aqueous coating composition which is characterized in that the composition comprises: PA0 (A) an acrylic resin-type emulsion, PA0 (B) a urethane resin-type emulsion and PA0 (C) a crosslinking agent the component (B) being a self-emulsifiable urethane emulsion prepard by subjecting a urethane prepolymer to reaction for chain extension by water and to emulsification after or during neutralization of the urethane prepolymer with a tertiary amine, the urethane prepolymer consisting essentially of (i) an aliphatic and/or alicyclic diisocyanate, (ii) a polyether diol and/or polyester diol both having a number-average molecular weight of about 500 to about 5000, (iii) a low-molecular weight polyhydroxyl compound and (iv) a dimethylolalkanoic acid in an NCO/OH ratio by equivalent of 1.1-1.9/1; and (2) a two-coat one-bake coating method characterized by use of said aqueous coating composition as the base-coat composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.