Low formaldehyde emitting crosslinking agents, process of preparation and curable compositions thereof
US5821323A · kind A · utility
3Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Aug 15, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D161/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Described is a liquid, partially alkoxymethylated melamine crosslinker composition having from about 2.6 to about 4.6 moles of combined formaldehyde per mole of melamine, from about 1.4 to about 4.4 moles of alkyl per mole of melamine, from about 1.3 to about 3.4 moles of NH per mole of melamine, a free formaldehyde level of less than about 0.5 weight percent based on 100 percent solids, and an N-methylol level of less than about 6.0 weight percent; processes for its preparation; a low formaldehyde emitting curable composition containing the crosslinker; as well as a method of coating a substrate and substrates so coated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.