GB1508123A - Process for preparing carboxyalkylated starch derivatives - Google Patents

Process for preparing carboxyalkylated starch derivatives

Info

Publication number
GB1508123A
GB1508123A GB5891773A GB5891773A GB1508123A GB 1508123 A GB1508123 A GB 1508123A GB 5891773 A GB5891773 A GB 5891773A GB 5891773 A GB5891773 A GB 5891773A GB 1508123 A GB1508123 A GB 1508123A
Authority
GB
United Kingdom
Prior art keywords
water
cross
starch
starch derivatives
carboxyalkylation
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB5891773A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Original Assignee
Unilever PLC
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
Application filed by Unilever PLC filed Critical Unilever PLC
Priority to GB5891773A priority Critical patent/GB1508123A/en
Publication of GB1508123A publication Critical patent/GB1508123A/en
Priority to US06/142,908 priority patent/US4296234A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B31/00—Preparation of derivatives of starch
    • C08B31/08—Ethers
    • C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
    • 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
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B31/00—Preparation of derivatives of starch
    • C08B31/003—Crosslinking of starch

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Hematology (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

1508123 Carboxyalkylation of cross-linked starch derivatives UNILEVER Ltd 18 March 1975 [19 Dec 1973] 58917/73 Addition to 1508570 Heading C3U A process for the carboxyalkylation of a cross-linked starch derivative comprises carboxyalkylating a cross-linked starch having a water swelling volume of 5-25 ml./g. to an actual degree of substitution of from 0À1 to 0À8 to provide a carboxyalkylated starch having a water regain of greater than 10 ml./g. Preferably the carboxyalkylating agent is chloracetic acid/sodium hydroxide. The product is useful for absorbing large quantities of water and urine and is prepared by applying a mixture of starch granules, water and a crosslinking agent as a thin film to a heated surface to effect granule rupture and then crosslinking as above.
GB5891773A 1973-12-19 1973-12-19 Process for preparing carboxyalkylated starch derivatives Expired GB1508123A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5891773A GB1508123A (en) 1973-12-19 1973-12-19 Process for preparing carboxyalkylated starch derivatives
US06/142,908 US4296234A (en) 1973-12-19 1980-04-23 Absorbent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5891773A GB1508123A (en) 1973-12-19 1973-12-19 Process for preparing carboxyalkylated starch derivatives

Publications (1)

Publication Number Publication Date
GB1508123A true GB1508123A (en) 1978-04-19

Family

ID=10482686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5891773A Expired GB1508123A (en) 1973-12-19 1973-12-19 Process for preparing carboxyalkylated starch derivatives

Country Status (1)

Country Link
GB (1) GB1508123A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4990551A (en) * 1988-10-14 1991-02-05 Chemie Linz Gesellschaft M.B.H. Absorbing polymer
EP0900807A1 (en) * 1997-09-05 1999-03-10 Instituut Voor Agrotechnologisch Onderzoek (Ato-Dlo) Absorbing material based on starch having improved absorbent properties and process for the preparation thereof
CN100408598C (en) * 2004-04-23 2008-08-06 郝庆阳 Composite modified starch and its preparing method
CN103030698A (en) * 2013-01-14 2013-04-10 郝庆阳 Compound modified starch prepared by four modification methods

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4990551A (en) * 1988-10-14 1991-02-05 Chemie Linz Gesellschaft M.B.H. Absorbing polymer
EP0900807A1 (en) * 1997-09-05 1999-03-10 Instituut Voor Agrotechnologisch Onderzoek (Ato-Dlo) Absorbing material based on starch having improved absorbent properties and process for the preparation thereof
WO1999012976A1 (en) * 1997-09-05 1999-03-18 Instituut Voor Agrotechnologisch Onderzoek (Ato-Dlo) Absorbing material based on starch having improved absorbent properties and process for the preparation thereof
CN100408598C (en) * 2004-04-23 2008-08-06 郝庆阳 Composite modified starch and its preparing method
CN103030698A (en) * 2013-01-14 2013-04-10 郝庆阳 Compound modified starch prepared by four modification methods
CN103030698B (en) * 2013-01-14 2015-10-07 郝庆阳 By composite modified starch prepared by four kinds of denaturation methods

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee