GB1378931A - Alginate sponge and process therefor - Google Patents

Alginate sponge and process therefor

Info

Publication number
GB1378931A
GB1378931A GB8572A GB8572A GB1378931A GB 1378931 A GB1378931 A GB 1378931A GB 8572 A GB8572 A GB 8572A GB 8572 A GB8572 A GB 8572A GB 1378931 A GB1378931 A GB 1378931A
Authority
GB
United Kingdom
Prior art keywords
alginate
sponge
water
dried
constituents
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
GB8572A
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.)
Freeze Dry Products Inc
Original Assignee
Freeze Dry Products Inc
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 Freeze Dry Products Inc filed Critical Freeze Dry Products Inc
Priority to GB8572A priority Critical patent/GB1378931A/en
Publication of GB1378931A publication Critical patent/GB1378931A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • A61L15/42—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
    • C08J2201/048—Elimination of a frozen liquid phase
    • C08J2201/0484—Elimination of a frozen liquid phase the liquid phase being aqueous
    • 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
    • C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
    • C08J2305/04—Alginic acid; Derivatives thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Animal Behavior & Ethology (AREA)
  • Hematology (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

1378931 Alginate sponges FREEZE DRY PRODUCTS Inc 3 Jan 1972 85/72 Headings C3C and C3U A sponge that is open-celled, porous, waterabsorbent and water-disintegrative comprises the constituents of at least one water-soluble alginate, e.g. sodium alginate, and at least one water-insoluble alginate, e.g. calcium alginate, (i.e. the alginate contains cations of types which would impart water-solubility and insolubility respectively to the alginate). The sponge may be made by freezing an aqueous dispersion of the constituents of the above two alginates and then sublimating the ice to form the sponge. The sponge may be rehydrated to a moisture content of 10-90% by wt. and then compressed to collapse a portion of the cells, and then dried. In Example I a gel was prepared by slurrying aqueous alginic acid with isopropyl alcohol, neutralizing a part of the acid with calcium carbonate and the remainder with sodium bicarbonate, the resultant product was dried, milled and dispersed in water to form a gel which was then frozen and dried to form a sponge.
GB8572A 1972-01-03 1972-01-03 Alginate sponge and process therefor Expired GB1378931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8572A GB1378931A (en) 1972-01-03 1972-01-03 Alginate sponge and process therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8572A GB1378931A (en) 1972-01-03 1972-01-03 Alginate sponge and process therefor

Publications (1)

Publication Number Publication Date
GB1378931A true GB1378931A (en) 1974-12-27

Family

ID=9698154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8572A Expired GB1378931A (en) 1972-01-03 1972-01-03 Alginate sponge and process therefor

Country Status (1)

Country Link
GB (1) GB1378931A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005341A1 (en) * 1992-09-10 1994-03-17 Mcneil-Ppc, Inc. Lyophilized foam wound dressing
US5914125A (en) * 1991-02-07 1999-06-22 Ultra Laboratories Limited Wound dressing
WO2004082594A2 (en) * 2003-03-18 2004-09-30 Sk Chemicals Co. Ltd. Alginate sponge and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5914125A (en) * 1991-02-07 1999-06-22 Ultra Laboratories Limited Wound dressing
WO1994005341A1 (en) * 1992-09-10 1994-03-17 Mcneil-Ppc, Inc. Lyophilized foam wound dressing
WO2004082594A2 (en) * 2003-03-18 2004-09-30 Sk Chemicals Co. Ltd. Alginate sponge and preparation method thereof
WO2004082594A3 (en) * 2003-03-18 2004-12-16 Sk Chemicals Co Ltd Alginate sponge and preparation method thereof

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Legal Events

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