Synergistic heat stabilizer compositions containing an antimony or a bismuth compound
US4231895A · kind A · utility
6Cited by
11References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1979 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Jan 2, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The combination of a conventional antimony--or bismuth-containing heat stabilizers with certain aromatic esters or aryloxides containing boron, phosphorus, silicon, antimony, tin or zinc interacts synergistically to provide an unexpectedly high level of heat stability to halogen-containing polymers such as polyvinyl chloride (PVC). In addition the aromatic ester or aryloxide inhibits spontaneous degradation of the heat stabilizing component in the presence of heat and/or light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.