Process for the sulfonation of an elastomeric polymer

Details Process for the sulfonation of an elastomeric polymer Process for the sulfonation of an elastomeric polymer

1979-03-12

1980-03-18

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 336AQ, 260 338UA, 260 4233, 260 4247, 260DIG31, 525353, C08L 9100

Patent

active

041939018

ABSTRACT:
An improved process for the sulfonation of an unsaturated elastomeric polymer to form a sulfonated elastomeric polymer, wherein a cement which contains an elastomeric polymer dissolved in a non-reactive solvent is contacted with a sulfonating agent at between about -100.degree. C. and +100.degree. C. for a period of time sufficient to result in the sulfonation of the elastomeric polymer wherein the improvement includes the use of a sulfonating agent which is formed from mixtures of a sulfur trioxide donor complexed with a Lewis base and a carboxylic acid anhydride ##STR1## or an acyl halide ##STR2## or with both, wherein R is selected from the group consisting of CH.sub.3 --, C.sub.2 H.sub.5 --, C.sub.3 H.sub.7 --, C.sub.4 H.sub.9 --, C.sub.5 H.sub.11, C.sub.6 H.sub.13 and C.sub.6 H.sub.5 and mixtures thereof. The molar ratio of ##STR3## and/or ##STR4## with the SO.sub.3 of the complex is at least 0.5.

REFERENCES:
patent: 3642728 (1972-02-01), Canter
patent: 3836511 (1974-09-01), O'Farrell et al.
patent: 3847854 (1974-11-01), Canter et al.

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