Polyurethane foams having low discoloration
US4324865A · kind A · utility
3Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1981 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Apr 17, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Polyurethane foams prepared with chlorinated oligomeric phosphate ester or tris(dichloropropyl) phosphate flame retardants have low scorch and surface discoloration by addition of a mixture of phenothiazine and 4,4'-thio-bis(6-tertiary butyl meta cresol).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.