Stabilizers for improved weatherability of clear polyvinyl chloride compositions
US6258880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 25, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/58
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Stabilizer compositions useful for protecting clear polyvinyl chloride and other clear halogenated polymer compositions against discoloration and degradation caused by exposure to light and weathering in addition to heat comprising an organotin compound selected from the group consisting of organotin mercaptides, sulfides of organotin mercaptides, organotin sulfides, and/or organotin carboxylates, and a free phenyl salicylate compound. These stabilizers offer improved ultraviolet light stability and weatherability to clear polyvinyl chloride resins designed for weatherable applications without detracting from the desired thermal performance. Clear polyvinyl chloride resin and other clear halogenated polymer compositions are also provided, containing these compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.