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1. (WO1997017397) WATER-ABSORBENT CELLULAR CROSSLINKED HYDROGEL POLYMERS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017397 International Application No.: PCT/EP1996/004644
Publication Date: 15.05.1997 International Filing Date: 25.10.1996
Chapter 2 Demand Filed: 26.05.1997
IPC:
A61L 15/42 (2006.01) ,A61L 15/60 (2006.01) ,C08F 220/06 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
L
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
15
Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
16
Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
42
Use of materials characterised by their function or physical properties
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
L
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
15
Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
16
Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
42
Use of materials characterised by their function or physical properties
60
Liquid-swellable gel-forming materials, e.g. super-absorbents
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
220
Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide, or nitrile thereof
02
Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
04
Acids; Metals salts or ammonium salts thereof
06
Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
Applicants:
BASF AKTIENGESELLSCHAFT [DE/DE]; D-67056 Ludwigshafen, DE (AllExceptUS)
HÄHNLE, Hans-Joachim [DE/DE]; DE (UsOnly)
WALTER, Manfred [DE/DE]; DE (UsOnly)
TROPSCH, Jürgen [DE/DE]; DE (UsOnly)
SCHORNICK, Gunnar [DE/DE]; DE (UsOnly)
ANSTOCK, Thomas [DE/DE]; DE (UsOnly)
Inventors:
HÄHNLE, Hans-Joachim; DE
WALTER, Manfred; DE
TROPSCH, Jürgen; DE
SCHORNICK, Gunnar; DE
ANSTOCK, Thomas; DE
Common
Representative:
BASF AKTIENGESELLSCHAFT; D-67056 Ludwigshafen, DE
Priority Data:
195 40 951.503.11.1995DE
Title (DE) WASSERABSORBIERENDE, SCHAUMFÖRMIGE, VERNETZTE HYDROGEL-POLYMERE
(EN) WATER-ABSORBENT CELLULAR CROSSLINKED HYDROGEL POLYMERS
(FR) POLYMERES HYDROGELS ABSORBANT L'EAU, EN MOUSSE, RETICULES
Abstract:
(DE) Wasserabsorbierende, schaumförmige, vernetzte Polymerisate, die erhältlich sind durch (I) Schäumen einer polymerisierbaren wäßrigen Mischung, die (a) Säuregruppen enthaltende monoethylenisch ungesättigte Monomere, die zu mindestens 50 Mol-% neutralisiert sind; (b) gegebenenfalls andere monoethylenisch ungesättigte Monomere; (c) Vernetzer; (d) Initiatoren; (e) 0,1 bis 20 Gew.-% mindestens eines Tensids; (f) gegebenenfalls mindestens einen Lösevermittler und (g) gegebenenfalls Verdicker, Schaumstabilisatoren, Polymerisationsregler, Füllstoffe und/oder Zellkeimbildner enthält, wobei das Schäumen durch Dispergieren von feinen Blasen eines gegenüber Radikalen inerten Gases erfolgt; und (II) Polymerisieren der geschäumten Mischung unter Bildung eines schaumförmigen Hydrogels und Einstellen des Wassergehalts des schaumförmigen Polymerisats auf 1 bis 45 Gew.-%, Verfahren zu ihrer Herstellung und ihre Verwendung in Sanitärartikeln, die zur Absorption von Körperflüssigkeiten eingesetzt werden und im Verbandmaterial zur Abdeckung von Wunden.
(EN) The invention concerns water-absorbent cellular crosslinked-polymer materials produced by (I) foaming a polymerizable aqueous mixture containing: (a) acid-group-containing monoethylenically unsaturated monomers which have been neutralized to at least 50 mol %; (b) optionally, other monoethylenically unsaturated monomers; (c) crosslinking agents; (d) initiators; (e) 0.1 to 20 % by wt. of at least one surfactant; (f) optionally, at least one solubilizer and (g) optionally, thickeners, foam stabilizers, polymerization-control agents, fillers and/or cell-nucleation agents, the foaming being carried out by dispersing throughout the mixture fine bubbles of a gas which is inert to radicals, and (II) polymerizing the foamed mixture to form a cellular hydrogel and adjusting the water content of the cellular hydrogel to 1 to 45 % by wt. The invention also concerns methods of producing such polymer materials and their use in personal-hygiene articles used to absorb body fluids and in bandage material used to cover injuries.
(FR) L'invention concerne des polymères absorbant l'eau, en mousse, réticulés, que l'on obtient (I) en faisant mousser un mélange aqueux polymérisable, qui contient (a) des monomères mono-éthyléniquement insaturés contenant des groupes acides qui sont neutralisés à au moins 50 mol %, (b) éventuellement d'autres monomères mono-éthyléniquement insaturés, (c) des agents de réticulation, (d) des initiateurs, (e) de 0,1 à 20 % en poids d'un agent tensioactif, (f) éventuellement au moins un agent de solubilisation et (g) éventuellement des épaississants, des stabilisateurs de mousse, des régulateurs de polymérisation, des charges et/ou des générateurs de germes cellulaires, le moussage se faisant par dispersion de fines bulles d'un gaz inerte vis-à-vis des radicaux, et (II) en polymérisant le mélange moussé pour former un hydrogel en mousse et en faisant en sorte que la teneur en eau du polymère en mousse soit comprise entre 1 et 45 % en poids. L'invention concerne également le procédé de fabrication de ces polymères et leur utilisation dans des articles sanitaires utilisés pour l'absorption des fluides corporels et dans des pansements destinés à recouvrir les plaies.
Designated States: CA, HU, JP, PL, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
ES2142623EP0858478US6136873JPH11514691