Modified diphenylmethane diisocyanates useful in polyurethanes or polyisocyanurates
US4221877A · kind A · utility
27Cited by
13References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Jan 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Covers a water-modified diisocyanate mixture obtained from water-treating a diphenylmethane diisocyanate to provide a diisocyanate mixture comprising 3-25 percent by weight of diphenylmethane biuret isocyanate and 75-97 percent diphenylmethane diisocyanate. Also covers the use of said water-modified diphenylmethane diisocyanate in preparing an improved polyurethane or polyisocyanurate polymer. Also covers said polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.