Phosphorus compounds and their use as flame retardant for polymers
US5130452A · kind A · utility
4Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | May 6, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/527
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of general formula I ##STR1## wherein X.sub.1 is chloro or bromo, PA1 X.sub.2 is chloro, bromo or hydrogen, and PA1 Y is O or S, and PA1 R.sub.1 and R.sub.2 are each independently of the other C.sub.1 -C.sub.4 alkyl, and PA1 R.sub.3 and R.sub.4 is a group of formula II ##STR2## which carries identical or different substituents and wherein R.sub.1, R.sub.2, X.sub.1 and X.sub.2 are as defined above, or R.sub.3 and R.sub.4, when taken together, form a group of formula III ##STR3## wherein R.sub.1 and R.sub.2 are as defined above, are very suitable flame retardants for polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.