Modified carbodiimide-containing polyisocyanates and glassy polyurethanes therefrom
US4260718A · kind A · utility
3Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1979 |
| Grant date | Apr 7, 1981 |
| Priority date | — |
| Expiry date | Dec 18, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/78
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel liquid organic polyisocyanate compositions are disclosed which are obtained by reacting a carbodiimide-containing organic polyisocyanate with a carboxylic acid terminated butadiene-acrylonitrile low molecular weight copolymer in the proportions of from about 2 to about 30 parts of the copolymer per 100 parts of the polyisocyanate provided there is from about 0.01 to about 0.5 carboxylic acid equivalent per equivalent of carbodiimide. The liquid polyisocyanates are particularly useful in providing hard glassy polyurethanes having improved impact strengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.