Polycarbonate compositions comprising hindered amine light stabilizers
US5856486A · kind A · utility
5Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1997 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Aug 27, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D241/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The instant invention relates to weatherable polycarbonate compositions (formulations or blends) comprising piperazinone or piperazine dione based HALS. These piperazinone or piperazine dione based HALS impart photostability to the polycarbonate formulations, thereby reducing yellowing or other forms of light induced degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.