Stabilized polymers and their preparation
US5304589A · kind A · utility
31Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1991 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Jan 18, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Oxidatively stabilized polyolefin polymers containing an antioxidant are made more resistant to loss of antioxidant by converting at least some of the antioxidant comprising a polymer of dicyclopentadiene and a phenolic compound into a form non extractable with cyclohexane. The conversion is preferably by reaction in the melt phase in the presence of a radical initiator. Addition of organotin esters, sulphides, oxides or thioethers reduces the color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.