Mixed masked (poly)isocyanates
US6965007B1 · kind B1 · utility
5Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1999 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Jul 22, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/8096
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition of at least partially masked isocyanates. The isocyanates are masked by at least two different masking agents, selected such that in the octanol test at 110° C., the ratio: D=percentage in equivalents of masking agents unblocking first at 110° C./percentage in equivalents of masking agents unblocking last at 110° C., is greater than 4/3, advantageously greater then 1.5, preferably greater than 2. When a masking agent comprises a phenol function as a masking function, it does not comprise a COOH function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.