Novel diorganotin derivatives of .alpha., .omega.-dimercaptans and method for preparing same

US3962295A · kind A · utility

Inventors

• John D. Collins
• Harold Coates · Burbank, US
• Iftikhar Hussain Siddiqui

Key dates

• Filing date: Dec 17, 1974
• Grant date: Jun 8, 1976
• Expiry date: Dec 17, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/226
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Organothiotin compounds with low tin content suitable as stabilizers for halogen containing resins e.g. polyvinyl chloride, are of formula ##EQU1## wherein R.sub.1 and R.sub. 2 are individually selected from the group consisting of alkyl radicals containing between 1 and 20 carbon atoms, cycloalkyl and phenyl radicals, m is an integer between 1 and 8, inclusive, and X and Y and individually selected from the group of radicals exhibiting the formulae ##EQU2## wherein Q.sub.1 represents a hydrogen atom, an alkyl radical containing between 1 and 6 carbon atoms, inclusive, or the radical CH.sub.2 Z.sub.3, wherein Z.sub.1, Z.sub.2 and Z.sub.3 are individually selected from the group of radicals exhibiting the formulae ##EQU3## and ##EQU4## or X and Y together form a divalent radical selected from the group consisting of ##EQU5## and ##EQU6## Q.sub.2 represents a divalent radical of a formula selected from the group consisting of ##EQU7## and wherein R.sub.3 is an alkyl radical containing between 1 and 20 carbon atoms or a substituted or unsubstituted phenyl or alkylphenyl radical, R.sub.4 is selected from the same group as R.sub.3, R.sub.5 is an alkyl radical containing between 1 and 20…