Compositions for stabilizing a vinyl or vinylidene halide polymer or chlorinated polyethylene, polymer compositions comprising such a stabilizer composition and shaped articles prepared therefrom
US4274999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1980 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Apr 15, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/58
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions for stabilizing a vinyl or vinylidene halide polymer or chlorinated polyethylene which comprise a major proportion of (a) at least one ester tin compound, for example .beta.-carboalkoxyethyl tin mercaptides, .beta.-carboalkoxyethyl tin mercapto-acid esters and the like and a minor proportion of (b) at least one unsubstituted or alkyl substituted o-dihydric phenol, such as catechol, t-butyl catechol and 2,3-dihydroxy naphthalene. These compositions synergistically contribute to the heat stability of vinyl or vinylidene halide polymers or chlorinated polyethylene. The performance of the compositions disclosed is particularly improved as regards resistance to early discoloration and long term heat stability of the ester tin compounds contained in them. Moreover, the amounts in which the compounds need be used for stabilization can be kept relatively small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.