PROCEDE POUR LA PREPARATION DU POLYVINYLACETATE PARTIEL HYDROLISE EN PHASE DE GEL

This invention relates to novel partially saponified polyvinyl acetates with a degree of hydrolysis of 30 to 65 mole % which might be considered as vinyl alcohol-vinyl acetate block copolymers. The invention relates further to the application of said novel block copolymers as a pore-forming additive...

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Bibliographic Details
Main Authors WOLFRAM,ERVIN,HU, ZRINYI,MIKLOS,HU, NAGY,MIKLOS,HU, MOLNAR,LASZLO,HU, TOTH,JANOS,HU, JAKSITY,LASZLO,HU, MARIASI,BELA,HU, GULYA,IMRE,HU, KOVACS,GABOR,HU
Format Patent
LanguageFrench
Romanian
Published 26.06.1981
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:This invention relates to novel partially saponified polyvinyl acetates with a degree of hydrolysis of 30 to 65 mole % which might be considered as vinyl alcohol-vinyl acetate block copolymers. The invention relates further to the application of said novel block copolymers as a pore-forming additive used together with at least one known protective colloid in the homo- and copolymerization of vinyl compounds, primarily of vinyl chloride in a pure aqueous medium.
Bibliography:Application Number: RO19770089155