Isocyanate-functional polymers containing a terminal monosulfide group
US4351755A · kind A · utility
8Cited by
5References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Oct 8, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31699
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Low molecular weight polydisperse isocyanate-functional acrylic polymers are provided which contain terminal monosulfide groups on at least 10% by number of polymer molecules but are substantially free of toxic monomeric isocyanates. The polymers are prepared by direct reaction of the monomers, e.g., 2-isocyanatoethyl methacrylate and butyl acrylate, in the presence of a mercaptan chain-transfer agent and a polymerization initiator but in the substantial absence of water and of Lewis-type bases. They can be crosslinked and are useful in a variety of applications such as moisture-curing coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.