Oxazoline stabilized diphenylmethane diisocyanate-polymethylene polyphenyl isocyanate compositions
US4320069A · kind A · utility
2Cited by
5References
6Claims
0Family size
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Key dates
| Filing date | Mar 20, 1981 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Mar 20, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/7664
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a compound having the formula ##STR1## wherein x plus y is equal to 3 and z is an integer of from 0 to 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.