Preparation of alkyl mercaptocarboxylate/dialkyl thiodicarboxyla

Details Preparation of alkyl mercaptocarboxylate/dialkyl thiodicarboxyla Preparation of alkyl mercaptocarboxylate/dialkyl thiodicarboxyla

1978-12-05

1980-11-04

Garner, Vivian

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

260399, 528279, 528293, 560147, C07C14800, C07C14920

Patent

active

042321670

ABSTRACT:
An olefinically unsaturated alkyl carboxylate is reacted with hydrogen sulfide in the presence of a lower alkanol using an addition catalyst with water and/or sulfur cocatalyst to give an alkyl mercaptocarboxylate/dialkyl thiodicarboxylate mixture having a high proportion of the mercaptocarboxylate. If sulfur is contained in the cocatalyst, dialkyl dithiodicarboxylates are also formed. The resulting mixture on transesterification with a poly(oxyalkylene)-polyol gives a poly(oxyalkylene)-polyester-poly(monosulfide)-polythiol or a poly(oxyalkylene)-polyester-poly(monosulfide)-poly(disulfide)-polythiol having a good balance of properties.

REFERENCES:
patent: 2268185 (1941-12-01), Burke et al.
patent: 2845390 (1958-07-01), Kerschner
patent: 3221056 (1965-11-01), Louthan
patent: 3280163 (1966-10-01), Louthan et al.
patent: 3769315 (1973-10-01), Keener et al.
patent: 3849443 (1974-11-01), Louthan
patent: 4052440 (1977-10-01), Gladstone et al.

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