Flame-retardant thermoplastic copolymers based on vinyl phosphonate derivatives grafted onto rubber
US5292817A · kind A · utility
11Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Sep 3, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F255/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Flame-retardant, thermoplastic copolymers and processes for making them are disclosed. The compositions are copolymers of a vinyl aromatic monomer, a vinyl phosphonic acid derivative, and optionally, an unsaturated organic diacid, ester, or anhydride that are grafted onto a rubber. Processes for making polymers having high molecular weight, good mechanical properties, and a high level of evenly distributed, chemically incorporated vinyl phosphonate flame retardant are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.