Continuous process for the preparation of alkyltin thiocarboxylic acid esters
US4554368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1982 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Dec 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/226
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of alkyltin thiocarboxylic acid esters from alkyltin halides and thiocarboxylic acid esters in the presence of an acid acceptor, which process comprises carrying out the reaction continuously in a reaction system comprising 1 to 5 agitator vessels with an average dwell time of 1 to 60 minutes, at a constant pH value in the range from 3 to 8, and in a temperature range from 40.degree. to 80.degree. C. and separating the product drawn off from the reaction system from the aqueous phase and subsequently drying it. The alkyltin thiocarboxylic acid esters obtained by the process of the invention are used for stabilizing homo- and copolymers of vinyl chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.