Aqueous thermoplastic coating composition for plastics materials and coating method using same
US5011881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2475/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed are (1) an aqueous thermoplastic coating composition for coating plastics substrates, the composition consisting essentially of: PA0 (A) an aqueous acrylic resin and PA0 (B) a urethane resin emulsion, the component (B) being a self-emulsifiable urethane emulsion prepared by subjecting a urethane prepolymer to reaction for chain extension by water and emulsification after or during neutralization of the urethane prepolymer with a tertiary amine, the urethane prepolymer consisting essentially of (i) an aliphatic and/or an 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 NCO/OH equivalent ratio of 1.1-1.9 : 1, the amount of the component (A) being about 1 to about 12% by weight and the amount of the component (B) being about 99 to about 88% by weight, based on the combined weight (calculated as solids) of the two components; and (2) a two-coat coating method for coating a plastics substrate, the method comprising the steps of coating a plastics substrate with a base-coat composition containing a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.