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1. (WO1998052979) POLYACRYLATE SUPERABSORBENT POST-POLYMERIZATION NEUTRALIZED WITH SOLID, NON-HYDROXYL NEUTRALIZING AGENT
Latest bibliographic data on file with the International Bureau
Pub. No.: WO/1998/052979 International Application No.: PCT/US1998/009158
Publication Date: 26.11.1998 International Filing Date: 05.05.1998
Chapter 2 Demand Filed: 22.02.1999
IPC:
A61L 15/60 (2006.01) ,C08F 8/00 (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
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
8
Chemical modification by after-treatment
Applicants:
AMCOL INTERNATIONAL CORPORATION [US/US]; One North Arlington 1500 West Shure Drive Arlington Heights, IL 60004, US
Inventors:
CARRICO, Peter, W.; US
NATHAN, Bala, V.; US
Agent:
NAPOLI, James, J.; Marshall, O'Toole, Gerstein, Murray & Borun Suite 6300 233 South Wacker Drive Chicago, IL 60606, US
Priority Data:
08/862,18823.05.1997US
08/911,94220.08.1997US
Title (EN) POLYACRYLATE SUPERABSORBENT POST-POLYMERIZATION NEUTRALIZED WITH SOLID, NON-HYDROXYL NEUTRALIZING AGENT
(FR) MATERIAU SUPERABSORBANT DE POLYACRYLATE NEUTRALISE APRES POLYMERISATION AVEC UN AGENT NEUTRALISANT SOLIDE, NON HYDROXY
Abstract:
(EN) A new and improved method of manufacturing an acrylic acid superabsorbent polymer, that is manufactured by any known technique, except that the acrylic acid monomer is polymerized to substantial completion before neutralization, and neutralization is accomplished by admixing a solid, e.g., powdered or granular, neutralizing agent into the acrylic acid polymer. Preferably, the neutralizing agent is a solid, non-hydroxyl neutralizing agent, such as sodium carbonate, potassium carbonate, ammonium carbonate or mixtures thereof. Cross linking may be accomplished during polymerization, simultaneously with neutralization, or cross linking may be carried out in a separate processing step subsequent to neutralization, or both.
(FR) Nouveau procédé amélioré pour produire un polymère superabsorbant d'acide acrylique. Ce polymère peut être fabriqué par une technique connue quelconque, à cela près que le monomère d'acide acrylique est polymérisé sensiblement jusqu'au bout avant la neutralisation, et que la neutralisation est réalisé par mélange d'un solide, p. ex. un agent neutralisant en poudre ou en granules, dans le polymère d'acide acrylique. L'agent neutralisant est de préférence un agent neutralisant solide non hydroxy tel que le carbonate de sodium, le carbonate de potassium, le carbonate d'ammonium ou des mélanges de ces derniers. La réticulation peut être réalisée pendant la polymérisation, simultanément à la neutralisation, ou par une opération de traitement distincte suivant la neutralisation, ou par ces deux techniques combinées.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0927205CN1234809AU1998072868