Devolatilization of styrene polymers with sulfonylhydrazides

Details Devolatilization of styrene polymers with sulfonylhydrazides Devolatilization of styrene polymers with sulfonylhydrazides

1977-10-20

1978-11-07

Levin, Stanford M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

526346, 528487, 528492, C08F 600

Patent

active

041246586

ABSTRACT:
A process for removing residual monomer from styrene based polymers is disclosed which comprises adding a sulfonylhydrazide having the general formula: ##STR1## where: R.sub.1 is H or an alkyl radical containing 1 to 4 carbon atoms; R.sub.2 is H or a --SO.sub.2 --NH--NH.sub.2, in which case R.sub.1 is H; and symmetric sulfonylhydrazides of the general formulae: ##STR2## where: X is --O--, --S--, --CH.sub.2 -- or --SO.sub.2 -- and mixtures thereof to the polymer resin. Products made by adding the hydrazides to the resins are also disclosed.

REFERENCES:
patent: 3325457 (1967-06-01), Finestone et al.
patent: 3491071 (1970-01-01), Lanzo
patent: 3987235 (1976-10-01), Fujimoto
patent: 3991136 (1976-11-01), Dalton et al.

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