Expandable powder coating composition, method of coating a substrate with heat-insulating foam and composite material obtained thereby
US5047439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1988 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Dec 2, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a hydroxyl group-containing polymer, (b) a cross-linking agent containing a polyisocyanate compound which is capable of reacting with the hydroxyl groups of the polymer to crosslink the polymer at a temperature higher than the melting point of the thermoplastic resin and which is solid at room temperature, and (c) a blowing agent capable of decomposing and generating a gas when heated to a temperature higher than the melting point of the thermoplastic resin. Powder coating with the coating composition can give a heat-insulating, foamed sheath or lining over the surface of a metal tube or box to be used in air conditioners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.