Method for stabilizing vinyl chloride polymers
US4085077A · kind A · utility
3Cited by
13References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1976 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Feb 23, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/57
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The presence of free carboxylic acids containing from 8 to 20 carbon atoms or the anhydrides of these acids inhibits the rate of heat induced discoloration exhibited by certain polymer formulations containing as a heat stabilizer the reaction product of a carboxylic acid with a stoichiometric excess, based on the number of carboxyl groups present, of a diorganotin oxide. The free acids are virtually ineffective heat stabilizers for these polymers in the absence of the aforementioned reaction product. The polymers which can be stabilized include vinyl chloride polymers and acrylonitrile-butadiene-styrene terpolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.