N-N'-dialkylphenylenediamines as curing agents in polyurethane and polyurea manufacture by reaction injection molding
US4806616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Dec 9, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
N,N'-dialkyl- and diaylphenylenediamines are effective curing agents in combination with other polyamines and polyols in reaction injection molding for a diverse class of polyisocyanates. The diamines provide a broad spectrum of cure times, as well as giving elastomers an interesting and useful diversity of properties. Such polyamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.