Modified polyurethane foams containing imide groups
US3933700A · kind A · utility
1Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1974 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Dec 10, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/8048
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fire resistant modified polyurethane foams are prepared from polyols and the monomeric products formed by the pre-reaction of polyarylpolyisocyanates and halogenated phthalic anhydrides at a temperature of about 210.degree. to 300.degree.C. wherein the weight ratio of the polyarylpolyisocyanate to be halogenated phthalic anhydride is from above 2:1 to 10:1 and wherein the amount of the imide incorporated into the polyarylpolyisocyanate varies from about 25 to about 75 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.