Mixtures of HALS compounds
US5976417A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1995 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Mar 30, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3492
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition, suitable for stabilizing a polymeric composition against the effects of light, comprising PA1 a) an N-acylated 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-acylated HALS) containing compound; and PA1 b) an N-oxy-subst. 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-oxy-substituted HALS) containing compound. A further aspect of the invention relates to a composition, suitable for stabilizing a polymeric composition against the effects of light, comprising PA1 a) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which a spiro group is attached in the 4-position (hereinafter defined as component i); and PA1 b) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which in the 4-position no spiro group is present (hereinafter defined as component ii). These compounds are suitable as light stabilizers in acid catalyzed lacquer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.