Process for preparing organo-arsenic derivatives of polystyrene

Details Process for preparing organo-arsenic derivatives of polystyrene Process for preparing organo-arsenic derivatives of polystyrene

1979-08-27

1980-10-07

Hamrock, William F.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525357, 525358, 525359, 525360, 525364, 525388, C08F 822, C08F 824, C08F 842

Patent

active

042269580

ABSTRACT:
A process is described for the preparation of a polymer having a recurring unit of the formula: ##STR1## where R is hydrogen or methyl, C.sub.n H.sub.2n is lower-alkylene, R.sub.1 and R.sub.2 are aryl or lower-alkyl, and x is 0 or 1. A polymer having a recurring unit of the formula: ##STR2## where X is chloro, bromo, iodo, chloroalkyl, bromoalkyl or iodoalkyl, is reacted with the appropriate aryl or alkyl chloride or bromide and arsenic trichloride, arsenic tribromide or arsenic trioxide in the presence of sodium, magnesium, or lithium metal. The resulting polymer is an intermediate in the preparation, by oxidation, of the corresponding As-oxide which polymer is useful as a catalyst for the conversion of isocyanates to the corresponding carbodiimides.

REFERENCES:
patent: 3711429 (1973-01-01), Ito et al.
patent: 4098973 (1978-07-01), Smith
patent: 4137386 (1979-01-01), Smith
patent: 4143063 (1979-03-01), Alberino et al.

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