BR9815033A - Absorbent foam and process to prepare it - Google Patents

Absorbent foam and process to prepare it

Info

Publication number
BR9815033A
BR9815033A BR9815033-2A BR9815033A BR9815033A BR 9815033 A BR9815033 A BR 9815033A BR 9815033 A BR9815033 A BR 9815033A BR 9815033 A BR9815033 A BR 9815033A
Authority
BR
Brazil
Prior art keywords
absorbent foam
approximately
absorbent
foam
microns
Prior art date
Application number
BR9815033-2A
Other languages
Portuguese (pt)
Inventor
Jian Qin
Raj Ramaswami Wallajapet
Gary D Williams
Original Assignee
Kimberly Clark Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/978,263 external-priority patent/US5948829A/en
Priority claimed from US08/977,918 external-priority patent/US5985434A/en
Application filed by Kimberly Clark Co filed Critical Kimberly Clark Co
Publication of BR9815033A publication Critical patent/BR9815033A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—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
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—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
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—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
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/425—Porous materials, e.g. foams or sponges
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/052—Inducing phase separation by thermal treatment, e.g. cooling a solution
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2300/00—Characterised by the use of unspecified polymers

Abstract

<B>ESPUMA ABSORVENTE E PROCESSO PARA PREPARAR A MESMA<D> é descrita uma espuma absorvente que apresenta propriedades desejáveis de maciez e flexibilidade e ainda assim é altamente aborvente. Em uma modalidade, a espuma absorvente compreende um polímero insolúvel em água, intumescível em água onde a espuma absorvente apresenta um valor de Intumescimento Livre de pelo menos aproximadamente 10 gramas de líquido por grama de espuma absorvente e um valor de Maciez inferior a aproximadamente 0,294 Newtons por grama por metro quadrado de espuma absorvente. Em uma segunda modalidade, a espuma absorvente tem um tamanho médio de célula das células na espuma absorvente entre aproximadamente 10 mícrons e aproximadamente 100 mícrons e uma espessura média de parede das células na espuma absorvente entre aproximadamente 0,1 mícron e aproximadamente 30 mícrons. Tal espuma absorvente pode ser utilizada em um produto absorvente descartável destinado à absorção de fluidos tais como fluidos corpóreos. Também é descrito um processo para preparar uma espuma absorvente. O processo compreende geralmente formar uma solução de um polímero em um solvente, congelar a solução em uma taxa de resfriamento relativamente lenta a uma temperatura abaixo do ponto de congelamento do solvente, retirar o solvente da solução congelada, e recuperar o polímero para formar uma espuma polimérica intumescível em água, insolúvel em água.<B> ABSORBENT FOAM AND PROCESS TO PREPARE THE SAME <D> An absorbent foam is described which has desirable properties of softness and flexibility and is still highly absorbent. In one embodiment, the absorbent foam comprises a water-insoluble, water-swellable polymer where the absorbent foam has a Free Swelling value of at least approximately 10 grams of liquid per gram of absorbent foam and a Softness value of less than approximately 0.294 Newtons per gram per square meter of absorbent foam. In a second embodiment, the absorbent foam has an average cell size of the cells in the absorbent foam between approximately 10 microns and approximately 100 microns and an average cell wall thickness in the absorbent foam between approximately 0.1 microns and approximately 30 microns. Such an absorbent foam can be used in a disposable absorbent product for absorbing fluids such as body fluids. Also described is a process for preparing an absorbent foam. The process generally comprises forming a solution of a polymer in a solvent, freezing the solution at a relatively slow cooling rate at a temperature below the freezing point of the solvent, removing the solvent from the frozen solution, and recovering the polymer to form a foam polymer swellable in water, insoluble in water.

BR9815033-2A 1997-11-25 1998-11-25 Absorbent foam and process to prepare it BR9815033A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/978,263 US5948829A (en) 1997-11-25 1997-11-25 Process for preparing an absorbent foam
US08/977,918 US5985434A (en) 1997-11-25 1997-11-25 Absorbent foam
PCT/US1998/024919 WO1999026670A1 (en) 1997-11-25 1998-11-25 Absorbent foam

Publications (1)

Publication Number Publication Date
BR9815033A true BR9815033A (en) 2000-10-03

Family

ID=27130597

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9815033-2A BR9815033A (en) 1997-11-25 1998-11-25 Absorbent foam and process to prepare it

Country Status (9)

Country Link
KR (1) KR100552032B1 (en)
AR (1) AR017661A1 (en)
AU (1) AU1421399A (en)
BR (1) BR9815033A (en)
CO (1) CO5070628A1 (en)
DE (1) DE19882845T1 (en)
GB (1) GB2347675B (en)
MX (1) MX229331B (en)
WO (1) WO1999026670A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10055084A1 (en) 2000-11-07 2002-06-13 Basf Ag Flexible, open-celled, microcellular polymer foams
US7053131B2 (en) 2002-12-03 2006-05-30 Kimberly-Clark Worldwide, Inc. Absorbent articles comprising supercritical fluid treated HIPE, I-HIPE foams and other foams
KR100722293B1 (en) * 2004-02-18 2007-05-28 주식회사 바이오폴리텍 Preparation of chito foam dressing for wound repair
WO2009022358A1 (en) 2007-08-10 2009-02-19 Luigi Ambrosio Superabsorbent polymer hydro gels and a method of preparing thereof
EP2163266A1 (en) * 2008-09-12 2010-03-17 The Procter &amp; Gamble Absorbent article comprising water-absorbing material
CA2838006C (en) 2011-06-07 2020-06-02 Gelesis Ip, Lp Method for producing hydrogels
US9855294B2 (en) 2014-06-20 2018-01-02 Gelesis, Llc Methods for treating overweight or obesity
BR112017016200B1 (en) 2015-01-29 2022-09-20 Gelesis, Llc CARBOXYMETHYL CELLULOSE CROSS-LINKED WITH CITRIC ACID AND ITS USE, METHOD FOR ITS PRODUCTION AND PHARMACEUTICAL COMPOSITION
US10729600B2 (en) 2015-06-30 2020-08-04 The Procter & Gamble Company Absorbent structure
WO2017079601A1 (en) 2015-11-04 2017-05-11 The Procter & Gamble Company Absorbent structure
JP2018535743A (en) * 2015-11-04 2018-12-06 ザ プロクター アンド ギャンブル カンパニー Thin flexible absorbent article
US11173078B2 (en) 2015-11-04 2021-11-16 The Procter & Gamble Company Absorbent structure
JP7132128B2 (en) 2016-04-25 2022-09-06 ジェレシス，エルエルシー How to treat constipation
CN113929819B (en) * 2021-11-11 2024-01-09 军事科学院军事医学研究院环境医学与作业医学研究所 Chitosan polyacrylamide composite porous hydrogel, metal ion detection reagent, and preparation method and application thereof
KR102485144B1 (en) * 2022-03-16 2023-01-06 주식회사 큐에이치바이오 Dermal filler composition containing hyaluronic acid and method for manufacturing the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5280079A (en) * 1986-11-20 1994-01-18 Allied Colloids Limited Absorbent products and their manufacture
ES2118219T3 (en) * 1991-12-20 1998-09-16 Allied Signal Inc LOW DENSITY MATERIALS THAT HAVE A HIGH SPECIFIC SURFACE, AND ARTICLES FORMED FROM THEM FOR USE IN THE RECOVERY OF METALS.

Also Published As

Publication number Publication date
GB2347675B (en) 2002-06-05
WO1999026670A1 (en) 1999-06-03
MX229331B (en) 2005-07-21
CO5070628A1 (en) 2001-08-28
DE19882845T1 (en) 2001-06-21
GB2347675A (en) 2000-09-13
AR017661A1 (en) 2001-09-12
GB0015476D0 (en) 2000-08-16
AU1421399A (en) 1999-06-15
KR100552032B1 (en) 2006-02-20
KR20010032398A (en) 2001-04-16
MXPA00005002A (en) 2000-11-01

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Legal Events

Date Code Title Description
B07A Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O(S) ARTIGO(S) 8O, 13 E 25 DA LPI.

B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.