Preparation of sulphonium polymers

Details Preparation of sulphonium polymers Preparation of sulphonium polymers

1979-03-07

1980-11-18

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

525350, 525329, C08F 0834

Patent

active

042346924

ABSTRACT:
Beta-hydroxyl polysulphoniums are prepared from polymers having epoxy groups in the polymeric chain or on the side chains. The polymer is treated with one or more mercaptans or thiols in the presence of a catalyst which opens the oxirane bridges, in particular a basic catalyst, after which the remaining epoxy groups are eliminated by the action of an acid; the resultant polysulphide is then reacted with an alkyl halide or ester in the absence of acid in order to form the polysulphonium. Purification of the product is then carried out. The products can be obtained in this manner in a form which is soluble or dispersible in water in a suitable state of purity, with good yields and with the desired hydrophilic-lipophilic ratio.

REFERENCES:
patent: 2831830 (1958-04-01), Schroeder
patent: 2992210 (1961-07-01), Gluckman
patent: 3793278 (1974-02-01), De Bona
patent: 3959106 (1976-05-01), Bosso et al.
patent: 4029621 (1977-06-01), Hartmann et al.
Organic Chemistry-2nd Edition-Morrison Boyd, pp. 466-467.

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