UY24123A1 - Proceso para preparar sales de quitosan con mejores propiedades absorbentes - Google Patents
Proceso para preparar sales de quitosan con mejores propiedades absorbentesInfo
- Publication number
- UY24123A1 UY24123A1 UY24123A UY24123A UY24123A1 UY 24123 A1 UY24123 A1 UY 24123A1 UY 24123 A UY24123 A UY 24123A UY 24123 A UY24123 A UY 24123A UY 24123 A1 UY24123 A1 UY 24123A1
- Authority
- UY
- Uruguay
- Prior art keywords
- chitosan
- water
- salt
- mixture
- salts
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
-
- 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
- A61L15/28—Polysaccharides or their derivatives
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Hematology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Dispersion Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cosmetics (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Paper (AREA)
Abstract
La presente invención se relaciona con sales de quitosan que tienen mejores propiedades absorbentes. Específicamente, ésta invención se relaciona con sales de quitosan, que tienen una mayor capacidad para absorber líquido cuando se las somete a presión externa, y con un proceso para su preparación. Se revela un procedimiento para preparar una sal de quitosan dilatable en agua, insoluble en agua, que tiene propiedades de absorción mejoradas. El método comprende: - formar una mezcla de quitosan insoluble en agua, agua, y un ácido seleccionado del grupo que consiste de ácidos monobásicos que tienen un pKa1 inferior a 6 y ácidos multibásicos que tienen un pKa 1 inferior a 6 y todos los pKan superiores a aproximadamente 5.5, donde n es un entero superior a 1, en el cual la mezcla tiene un pH de equilibrio de entre 2 y 6,5, y la mezcla se prepara bajo condiciones efectivas para formar una sal de quitosan soluble en agua, en el cual la sal de quitosan soluble en agua se disuelve en el agua para formar una mezcla homogénea; y - recuperar la sal de quitosan de la mezcla homogénea, en el cual la sal de quitosan recuperada es dilatable en agua e insoluble en agua, y exhibe un valor inicial de Absorbancia Bajo Carga de por lo menos 14 gramos por gramo. El quitosan tiene un grado promedio de acetilación de entre 0 y 0,5. La sal de quitosan es clorhidrato de quitosan, bromhidrato de quitosan, fosfato de quitosan, formato de quitosan, acetato de quitosan, propionato de quitosan, cloracetato de quitosan, hidroxiacetato de quitosan, butirato de quitosan, isobutirato de quitosan, acrilato de quitosan, o mezclas de los mismos.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/362,395 US5599916A (en) | 1994-12-22 | 1994-12-22 | Chitosan salts having improved absorbent properties and process for the preparation thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
UY24123A1 true UY24123A1 (es) | 1996-06-11 |
Family
ID=23425957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
UY24123A UY24123A1 (es) | 1994-12-22 | 1995-12-20 | Proceso para preparar sales de quitosan con mejores propiedades absorbentes |
Country Status (21)
Country | Link |
---|---|
US (1) | US5599916A (es) |
EP (1) | EP0799247B1 (es) |
JP (1) | JPH10511720A (es) |
KR (1) | KR100412190B1 (es) |
AR (1) | AR000398A1 (es) |
AU (1) | AU689692B2 (es) |
CA (1) | CA2208892A1 (es) |
DE (1) | DE69527370T2 (es) |
EG (1) | EG21032A (es) |
FR (1) | FR2728575B1 (es) |
GB (1) | GB2296250B (es) |
MX (1) | MX212300B (es) |
MY (1) | MY113109A (es) |
PE (1) | PE12597A1 (es) |
PH (1) | PH11995051943B1 (es) |
SV (1) | SV1995000091A (es) |
TR (1) | TR199501616A2 (es) |
TW (1) | TW323286B (es) |
UY (1) | UY24123A1 (es) |
WO (1) | WO1996020015A2 (es) |
ZA (1) | ZA9510740B (es) |
Families Citing this family (86)
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US5247072A (en) * | 1991-10-25 | 1993-09-21 | Kimberly-Clark Corporation | Carboxyalkyl polysaccharides having improved absorbent properties and process for the preparation thereof |
CA2072918A1 (en) * | 1992-02-14 | 1993-08-15 | Jian Qin | Modified polysaccharides having improved absorbent properties and process for the preparation thereof |
CA2076732C (en) * | 1992-04-17 | 2006-05-09 | Kimberly-Clark Worldwide, Inc. | Modified polysaccharides having improved absorbent properties and process for the preparation thereof |
DE4318094B4 (de) * | 1993-06-01 | 2004-03-04 | Stockhausen Gmbh & Co. Kg | Superabsorbentien, Verfahren zu ihrer Herstellung sowie ihre Verwendung |
-
1994
- 1994-12-22 US US08/362,395 patent/US5599916A/en not_active Expired - Lifetime
-
1995
- 1995-12-12 SV SV1995000091A patent/SV1995000091A/es unknown
- 1995-12-14 EP EP95943779A patent/EP0799247B1/en not_active Expired - Lifetime
- 1995-12-14 AU AU45167/96A patent/AU689692B2/en not_active Ceased
- 1995-12-14 DE DE69527370T patent/DE69527370T2/de not_active Expired - Lifetime
- 1995-12-14 WO PCT/US1995/016191 patent/WO1996020015A2/en active IP Right Grant
- 1995-12-14 JP JP8520480A patent/JPH10511720A/ja active Pending
- 1995-12-14 KR KR1019970704277A patent/KR100412190B1/ko active
- 1995-12-14 MX MX9704660A patent/MX212300B/es not_active IP Right Cessation
- 1995-12-14 CA CA002208892A patent/CA2208892A1/en not_active Abandoned
- 1995-12-15 PH PH51943A patent/PH11995051943B1/en unknown
- 1995-12-18 ZA ZA9510740A patent/ZA9510740B/xx unknown
- 1995-12-19 AR AR33470995A patent/AR000398A1/es unknown
- 1995-12-20 TR TR95/01616A patent/TR199501616A2/xx unknown
- 1995-12-20 PE PE1995287591A patent/PE12597A1/es not_active Application Discontinuation
- 1995-12-20 UY UY24123A patent/UY24123A1/es not_active IP Right Cessation
- 1995-12-20 TW TW84113624A patent/TW323286B/zh active
- 1995-12-21 FR FR9515230A patent/FR2728575B1/fr not_active Expired - Lifetime
- 1995-12-21 GB GB9526240A patent/GB2296250B/en not_active Expired - Lifetime
- 1995-12-21 EG EG107295A patent/EG21032A/xx active
- 1995-12-22 MY MYPI95004047A patent/MY113109A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US5599916A (en) | 1997-02-04 |
KR100412190B1 (ko) | 2004-04-29 |
MX9704660A (es) | 2000-04-30 |
MX212300B (es) | 2002-12-19 |
TR199501616A2 (tr) | 1996-07-21 |
GB2296250A (en) | 1996-06-26 |
MY113109A (en) | 2001-11-30 |
EP0799247B1 (en) | 2002-07-10 |
ZA9510740B (en) | 1996-06-20 |
TW323286B (es) | 1997-12-21 |
KR987000880A (en) | 1998-04-30 |
SV1995000091A (es) | 1996-07-25 |
PH11995051943B1 (en) | 1999-07-05 |
DE69527370D1 (de) | 2002-08-14 |
AU689692B2 (en) | 1998-04-02 |
PE12597A1 (es) | 1997-04-30 |
WO1996020015A3 (en) | 1996-09-06 |
FR2728575A1 (fr) | 1996-06-28 |
EP0799247A2 (en) | 1997-10-08 |
WO1996020015A2 (en) | 1996-07-04 |
AR000398A1 (es) | 1997-06-18 |
GB9526240D0 (en) | 1996-02-21 |
CA2208892A1 (en) | 1996-07-04 |
EG21032A (en) | 2000-09-30 |
AU4516796A (en) | 1996-07-19 |
GB2296250B (en) | 1997-09-10 |
FR2728575B1 (fr) | 1997-06-06 |
JPH10511720A (ja) | 1998-11-10 |
DE69527370T2 (de) | 2002-12-12 |
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Legal Events
Date | Code | Title | Description |
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VENC | Patent expired |
Effective date: 20141115 |