Aqueous heat curable particulate coating composition of elastomeric emulsion copolymer and thermosetting copolymer
US4174336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Jun 15, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D151/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Protective and decorative coatings for metal are prepared using aqueous polymer compositions consisting essentially of a thermosetting vinyl or acrylic polymer which has been polymerized in the presence of a preformed, crosslinked, elastomeric copolymer. The rate at which the monomers of the thermosetting polymer are added to the reaction mixture is substantially equal to the rate of reaction of these monomers to form the thermosetting polymer. This is believed to result in the formation of minute emulsified particles containing a core of the elastomeric copolymer surrounded by a layer of the thermosetting polymer. The thermosetting polymer contains pendant hydroxyl groups and a latent, heat-activated crosslinking agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.