Stabilizer composition
US6593485B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5205
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a stabilizer composition comprising at least one processing stabilizer selected from special phosphite, mono- and diphosphonite compounds, at least one acid scavenger selected from the group consisting of selected metal stearates, hydrotalcites, oxides, hydroxides of alkaline earth metals, at least one UV stabilizer selected from compounds containing at least one 2,2,6,6-tetraalkylpiperidinyl-group and optionally at least one sterically hindered phenolic antioxidant. A further subject matter of the invention is a solid masterbatch composition or a liquid concentrate comprising above-mentioned stabilizer composition. The invention relates also to a process for stabilizing polymeric materials selected from the group consisting of special polyolefins comprising adding to the polymeric material a stabilizing quantity of said stabilizing composition. The invention comprises also a stabilized polymeric material comprising said stabilizing composition and the above-mentioned polymeric material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.