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

1978-10-16

1980-01-22

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 285B, 260 336AQ, 260 336UA, 260 338UA, 260 4233, 260 4247, 260DIG31, 525353, 525333, C08L 9100

Patent

active

041849884

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 nonreactive 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 sulfonation of the elastomeric polymer wherein the improvement includes the use of a sulfonating agent which is formed from mixtures of acyl sulfate ##STR1## with carboxylic acid anhydrides ##STR2## with carboxylic acid halides ##STR3## 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 or C.sub.6 H.sub.5 and mixtures thereof. The molar ratio of ##STR4## is at least one.

REFERENCES:
patent: 3396136 (1968-08-01), Dickerson
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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