Suspension polymerisation of vinyl chloride - in presence of sorbitan ester(s) to give granular porous polymers

Vinyl chloride is polymerised opt. with is not >30 wt.% of other copolymerisable monomers, in presence of free-radical catalysts, dispersing agents, polymerisation additives, and sorbitan esters. The esters used are liq. at room temp., their acid gps. are derived from branched-chain satd. carboxy...

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Bibliographic Details
Main Authors SCHAEDLER,HUGO,.DR, DIKOW,HERMANN,.DR, DEUSCHEL,WALTER,.DR, FRIEDRICH,.HAUSZ,ALFRED, OSCHMANN,WERNER,.DR
Format Patent
LanguageEnglish
German
Published 08.03.1979
Edition2
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:Vinyl chloride is polymerised opt. with is not >30 wt.% of other copolymerisable monomers, in presence of free-radical catalysts, dispersing agents, polymerisation additives, and sorbitan esters. The esters used are liq. at room temp., their acid gps. are derived from branched-chain satd. carboxylic acids, and they have a hydro-lipophile equilibrium value 7 (pref. 3-7). Vinyl chloride is pref. polymerised in a closed system. In such a system polymer solids, e.g. sorbitan mono-palmitate, are not readily introduced. Certain solvents, e.g. toluene, are retained by the polymer; PVC contg. entrained polymer is not suitable for packaging. The method overcomes the problems of solvent retention.
Bibliography:Application Number: DE19772740209