Process for the production of sulphur-modified solid chloroprene

Details Process for the production of sulphur-modified solid chloroprene Process for the production of sulphur-modified solid chloroprene

1983-05-20

1984-06-05

Ziegler, J.

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

Synthetic resins

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

525215, 5253308, 5253313, 525343, 525350, C08F 800

Patent

active

044529473

ABSTRACT:
Vulcanisable, elastomeric chloroprene-sulphur copolymers having viscosities of from 60 to 35 MU, strengths of >20 MPa and sulphur contents of from about 0.5 to 0.7%, by weight, in the batch are obtained by polymerising chloroprene in the presence of from 0.10 to 0.35%, by weight, of sulphur to form a latex I, polymerising chloroprene in the presence of from 0.50 to 1.00% by weight, of sulphur to form a latex II, mixing latices I and II in a ratio of from 4:1 to 1:4 (based in each case on solids), optionally together with other sulphur-modified polychloroprene latices, the mixture is peptised and worked-up to form the solid rubber, the percentages quoted being based on the quantity of monomer.

REFERENCES:
patent: 3752785 (1973-08-01), Smith

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