Liquid diphenylmethane diisocyanate
US5319053A · kind A · utility
30Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1993 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Sep 2, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/7837
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a stable, liquid MDI prepolymer containing an allophanate-modified MDI, having an NCO content of 12 to 32.5% comprising a reaction product of an aliphatic alcohol and diphenylmethane diisocyanate comprising about 2 to 60% by weight 2,4'-diphenylmethane diisocyanate and less than 6% by weight of the 2,2'-diphenylmethane diisocyanate, and the rest being 4,4'-diphenylmethane diisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.