Claims
- 1. A process for the production of sulphur-modified, vulcanisable solid chloroprene rubbers having viscosities of from 60 to 35 MU and sulphur contents of from 0.5 to 0.7%, by weight, in the batch as a whole, comprising polymerising chloroprene in the presence of from 0.l0 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), peptising, the mixed latex, adjusting the pH to <7, coagulating and drying the mixture to form the solid rubber, the percentages quoted being based on the quantity of monomer.
- 2. The process of claim 1, wherein up to 10%, by weight, of the chloroprene is replaced by one or more other copolymerisable monomers.
- 3. The process of claim 1, wherein up to 5%, by weight, of the chloroprene is replaced by 2,3-dichlorobutadiene.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3143524 |
Nov 1981 |
DEX |
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Parent Case Info
This is a continuation-in-part of Ser. No. 436,515, filed Oct. 25, 1982, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3752785 |
Smith |
Aug 1973 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
1807298 |
Apr 1984 |
DEX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
436515 |
Oct 1982 |
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