Phosphorus compounds as stabilizers
US7166660B2 · kind B2 · utility
2Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Aug 10, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to phosphorus compounds as stabilizers for polymers with respect to exposure to heat or mechanical stress during processing. In particular, even very small concentrations of from 25 to 350 ppm of bis(diphenylphosphino)-2,2-dimethylpropane are highly effective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.