Flame retarded polyurethane foams with improved color characteristics
US4146687A · kind A · utility
15Cited by
10References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1977 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Aug 22, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The discoloration of low density polyurethane foams produced with certain flame retardants is reduced by incoporating into the foam phenothiazine and amine antioxidants. The phenothiazine and amine antioxidants can be employed by admixing with the flame retardant from about 0.25 to about 5.0 percent of the phenothiazine-amine antioxidant combination by weight of the flame retardant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.