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1. (WO1997019129) PROCESS TO PREPARE TWO PHASE FOAM COMPOSITIONS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/019129 International Application No.: PCT/US1996/018628
Publication Date: 29.05.1997 International Filing Date: 15.11.1996
Chapter 2 Demand Filed: 16.06.1997
IPC:
A61F 13/15 (2006.01) ,A61L 15/42 (2006.01) ,C08J 9/28 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13
Bandages or dressings; Absorbent pads
15
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
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
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
9
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
28
by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
Applicants:
SHELL OIL COMPANY [US/US]; Intellectual Property 900 Louisiana Street P.O. Box 2463 Houston, TX 77252-2463, US
Inventors:
BROWNSCOMBE, Thomas, Fairchild; US
BASS, Ronald, Marshall; US
WONG, Pui, Kwan; US
BLYTAS, George, Constantine; US
GERGEN, William, Peter; US
MORES, Maryanne; US
Agent:
CHRISTENSEN, Del, S.; Shell Oil Company Intellectual Property 900 Louisiana Street P.O. Box 2463 Houston, TX 77252-2463, US
ELLIS-JONES, Patrick; J.A. Kemp & Co. 14 South Square Gray's Inn London WC1R 5LX, GB
Priority Data:
08/560,14017.11.1995US
Title (EN) PROCESS TO PREPARE TWO PHASE FOAM COMPOSITIONS
(FR) PROCEDE DE PREPARATION DE COMPOSITIONS DE MOUSSE DIPHASIQUE
Abstract:
(EN) A process is provided for the production of a porous cross-linked polymeric foam comprising the steps of: (a) providing a first water-in-oil emulsion comprising (i) a first mixture of polymerizable monomers comprising at least one oil-soluble vinyl monomer and from about 2 to about 70 weight percent, based on the mixture, of a multifunctional unsaturated cross-linking monomer, (ii) at least 70 weight percent, based on the emulsion, of water as the internal phase, (iii) an effective amount to produce the water-in-oil emulsion of a first surfactant, and (iv) a first polymerization initiator; (b) providing a second water-in-oil emulsion comprising (i) a mixture of polymerizable monomers comprising at least one oil-soluble vinyl monomer and from about 2 to about 70 weight percent, based on the mixture, of a second multifunctional unsaturated cross-linking monomer, (ii) at least 70 weight percent, based on the emulsion, of water as the internal phase, (iii) an effective amount to produce the water-in-oil emulsion of a second surfactant, and (iv) a second polymerization initiator; (c) combining the first and second emulsions; and (d) curving said polymerizable monomers under conditions effective to polymerize and cross-link the polymer prior to significant diffusion between the emulsions. Polymeric foams can be prepared by this process that exhibit positive attributes of foams formed by curing of each of the emulsions individually.
(FR) Procédé de production d'une mousse de polymère réticulée poreuse consistant à: a) préparer une première émulsion huileuse comprenant i) un premier mélange de monomères polymérisables comprenant au moins un monomère de vinyle soluble dans l'huile et entre environ 2 et environ 70 pour cent en poids du mélange d'un monomère de réticulation insaturé multifonctionnel, ii) au moins 7 pour cent en poids d'émulsion d'eau comme phase interne, iii) une quantité efficace d'un premier tensioactif pour produire l'émulsion d'eau dans l'huile, et iv) un premier initiateur de polymérisation; b) préparer une deuxième émulsion d'eau dans l'huile constituée i) d'un mélange de monomères polymérisables constitué d'au moins un monomère de vinyle soluble dans l'huile et d'environ 2 à environ 70 pour cent en poids de mélange d'un deuxième monomère de réticulation insaturé multifonctions, ii) d'au moins 70 pour cent en poids d'émulsion d'eau comme phase interne iii) d'une quantité efficace d'un deuxième tensioactif pour produire l'émulsion d'eau dans l'huile, et iv) d'un deuxième initiateur de polymérisation; c) combiner la première et la deuxième émulsions; et d) cuire ces monomères dans des conditions efficaces de polymérisation et réticuler le polymère avant toute diffusion significative entre les émulsions. Ce procédé permet de préparer des mousses de polymères présentant les qualités de mousses formées par la cuisson de chacune des émulsions individuellement.
Designated States: AL, AU, BB, BG, BR, CA, CN, CZ, EE, GE, HU, IL, IS, JP, KP, KR, LK, LR, LT, LV, MG, MK, MN, MX, NO, NZ, PL, RO, SG, SI, SK, TR, TT, UA, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, 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:
EP0861287AU1997010214