Secondary aromatic diamines as curing agents in polyurethane manufacturing
US4578446A · kind A · utility
15Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1985 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Mar 25, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyurethanes may be conveniently made by curing isocyanate-terminated urethane prepolymers with a N,N'-dialkylmethylenedianiline. The diamine N,N'-di(2-butyl)-4,4'-methylenedianiline is a particularly useful diamine. The resulting polyurethanes often are thermoplastic rather than thermosetting, making them especially useful as coatings, adhesives, and sealants. Such secondary aromatic diamines have acceptable pot lives and afford products with a variety of properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.