Method of stabilizing EPDM modified polypropylene by adding piperidine compounds
US6201047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to the use of piperidine compounds of the formula I ##STR1## in which PA0 R.sub.1 is hydroxyl, lower alkyl, lower alkoxy, PA0 R.sub.2 is a substituted or unsubstituted, mono- or bicyclic radical of aromatic type, PA0 R.sub.3 is oxygen, --NH-- or --N(C.sub.1-4 -alkyl)- and PA0 R.sub.8 independently at each occurrence is hydrogen or methyl for preparing light-stabilized, EPDM-modified polypropylene which is employed in particular in automotive construction, such as for shock absorbers, cover strips and the like. A further subject of the invention is the combination of abovementioned piperidine compounds with known UV absorbers. The invention also relates to EPDM-modified polypropylene which contains from 0.05 to 2.5% by weight, preferably from 0.1 to 0.6% by weight, of a radical of a compound of the above formula I, and to products produced therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.