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1. (WO1992010533) POLYVINYL PYRROLIDONE-GRAFTED COATINGS ON PREFORMED POLYMERS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010533 International Application No.: PCT/US1991/009093
Publication Date: 25.06.1992 International Filing Date: 04.12.1991
Chapter 2 Demand Filed: 02.07.1992
IPC:
C08F 291/18 (2006.01) ,C08J 7/16 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
291
Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/-C08F289/183
18
on to irradiated or oxidised macromolecules
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
7
Chemical treatment or coating of shaped articles made of macromolecular substances
12
Chemical modification
16
with polymerisable compounds
Applicants:
BAXTER INTERNATIONAL INC. [US/US]; One Baxter Parkway Deerfield, IL 60015, US
Inventors:
BERTRAND, William, J.; US
COULTER, Stephen, L.; US
REICH, Cary, J.; US
DEANTONIO, Paul; US
Agent:
SCHIFFER, Michael, C. ; 2132 Michelson Drive Irvine, CA 92715-1304, US
SUN, Raymond; Baxter Health Care Corporation 2132 Michelson Drive Irvine, CA 92715-1304, US
Priority Data:
622,91706.12.1990US
Title (EN) POLYVINYL PYRROLIDONE-GRAFTED COATINGS ON PREFORMED POLYMERS
(FR) ENDUITS OBTENUS PAR GREFFAGE DE PYRROLIDONE DE POLYVINYLE SUR DES POLYMERES PREFORMES
Abstract:
(EN) In an improved method for producing a surface graft of a hydrophilic polymer upon a preformed solid or semi-solid polymer substrate having hydroperoxide groups along its surface, n-vinyl pyrrolidone is utilized as the surface-grafting monomer, the substrate is selected to be insoluble in n-vinyl pyrrolidone, and the polymerization is carried out in aqueous alkaline conditions utilizing a combination of metal salts to provide a variable valence metal ion in a reduced state capable of oxidizing to suppress homopolymerization of the monomer in the solution. When the substrate is at least partially soluble in the n-vinyl pyrrolidone, an ethylenically unsaturated monomer having a higher reactivity with the substrate than n-vinyl pyrrolidone is added to the alkaline polymerization solution as a ''seeding'' monomer. Addition of the ''seeding'' monomer results in a surface-grafted copolymer effectively externalized from the substrate.
(FR) Dans le procédé amélioré décrit, qui sert à produire une greffe de surface d'un polymère hydrophile sur un substrat polymère solide ou semi-solide préformé, comportant des groupes hydroperoxyde le long de sa surface, on utilise de la pyrrolidone n-vinylique comme monomère de greffage de surface, le substrat est choisi de façon à être insoluble dans la pyrrolidone n-vinylique, et la polymérisation est effectuée dans des conditions alcalines aqueuses au moyen d'une combinaison de sels métalliques, pour produire un ion métal de valence variable dans un état réduit, capable de s'oxyder pour supprimer l'homopolymérisation du monomère dans la solution. Lorsque le substrat est au moins partiellement soluble dans la pyrrolidone n-vinylique, un monomère éthyléniquement insaturé présentant une réactivité plus grande avec le substrat que la pyrrolidone n-vinylique est ajouté à la solution de polymérisation alcaline pour servir de monomère de germination. L'addition du monomère de germination permet d'obtenir un copolymère greffé en surface se développant efficacement vers l'extérieur du substrat.
Designated States: CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0560895JPH06503596CA2097088