Toughening of cured vinyl ester resins by inclusion in the uncured resins of oligomeric vinyl-reactive urethanes which phase out upon curing
US4824919A · kind A · utility
19Cited by
9References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Jan 17, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/92
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Vinyl ester/styrene mixtures are flexibilized by addition thereto of minor amounts of urethanes which (1) comprise at least one polyglycol moiety and two urethane groups and are terminated by vinyl-reactive end groups, and (2) form a dispersed second phase in the cured mixture. The flexibilized compositions otherwise largely retain the characteristic properties of the unflexibilized mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.