Processing

Please wait...

Settings

Settings

Goto Application

1. WO1997031041 - STRONGLY SWELLABLE, MODERATELY CROSS-LINKED COPOLYMERS OF VINYLPYRROLIDONE AND VINYL ACETATE

Publication Number WO/1997/031041
Publication Date 28.08.1997
International Application No. PCT/US1996/019887
International Filing Date 12.12.1996
Chapter 2 Demand Filed 23.06.1997
IPC
C08F 226/10 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
226Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
06by a heterocyclic ring containing nitrogen
10N-Vinyl-pyrrolidone
CPC
C08F 226/10
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
226Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
06by a heterocyclic ring containing nitrogen
10N-Vinyl-pyrrolidone
Applicants
  • ISP INVESTMENTS INC. [US]/[US]
Inventors
  • ZHONG, Yuanzhen
  • WOLF, Philip, F.
Agents
  • MAUE, Marilyn, J.
Priority Data
08/603,66820.02.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) STRONGLY SWELLABLE, MODERATELY CROSS-LINKED COPOLYMERS OF VINYLPYRROLIDONE AND VINYL ACETATE
(FR) COPOLYMERES MODEREMENT RETICULES POUVANT FORTEMENT GONFLER, COMPOSES DE VINYLPYRROLIDONE ET DE VINYLACETATE
Abstract
(EN)
Strongly swellable, moderately cross-linked poly(vinyl)pyrrolidone/vinyl acetate) copolymer (XL-PVP/VA) in the form of fine, white powders characterized by (a) an aqueous gel volume of about 15 to 150 ml/g of polymer, (b) a Brookfield viscosity in 5 % aqueous solution of at least about 10,000 cps, and (c) being prepared directly by precipitation polymerization of VP and VA monomers in the presence of a cross-linking agent in the amount of about 0.1 to about 2 % by weight of VP and VA.
(FR)
Cette invention concerne un copolymère de vinylpyrrolidone et de vinylacétate (XL-PVP/VA) modérément réticulé et susceptible de fortement gonfler, qui se présente sous la forme de fines poudres blanches caractérisées (a) par un volume de gel aqueux représentant de 15 à 150 ml/g de polymère, (b) par une viscosité Brookfield dans une solution aqueuse à 5 % égale au moins à 10000 cps environ et (c) par le fait qu'on les prépare directement au moyen d'une polymérisation par précipitation des monomères de vinylpyrrolidone (VP) et de vinylacétate (VA) en présence d'un agent de réticulation en quantité représentant de 0,1 % environ à 2 % environ en poids de VP et VA.
Latest bibliographic data on file with the International Bureau