Preparation of alkyl mercaptocarboxylate/dialkyl thiodicarboxyla

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

1980-06-09

1981-12-22

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528274, 528293, 528297, 528300, 560154, C08G 6304, C08G 6334

Patent

active

043072259

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: 4052440 (1977-10-01), Gladstone et al.
patent: 4113707 (1978-09-01), Louthan et al.
patent: 4232167 (1980-11-01), Louthan

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