Polymerization of chloroprene

Storage-stable polychloroprene is obtained, using a polymerization initiator comprising a mixture of (1) a redox system comprising (a) a reducing agent selected from the group consisting of (i) sodium dithionite, (ii) formamidine sulphinic acid, and (iii) a mixture from (i) and (ii), (b) potassium p...

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Bibliographic Details
Main Authors HOHMANN; GERHARD, CASPER; RUDOLF, WENDLING; PETER, KONTER; WOLFGANG
Format Patent
LanguageEnglish
Published 13.06.1989
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:Storage-stable polychloroprene is obtained, using a polymerization initiator comprising a mixture of (1) a redox system comprising (a) a reducing agent selected from the group consisting of (i) sodium dithionite, (ii) formamidine sulphinic acid, and (iii) a mixture from (i) and (ii), (b) potassium peroxodisulphate as an oxidizing agent and, optionally, (2) sodium anthraquinone- beta -sulphonate as a co-activator in the presence of oxygen, wherein from 10 to 90 by weight of the initiator are present at the commencement of polymerization and the remainder is added during the polymerization, and after a certain degree of conversion the reducing agent is the only component of redox system (1) which remains to be added.
Bibliography:Application Number: US19880223092