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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S977/00—Nanotechnology
  • Y10S977/902—Specified use of nanostructure
  • Y10S977/904—Specified use of nanostructure for medical, immunological, body treatment, or diagnosis
  • Y10S977/905—Specially adapted for travel through blood circulatory system

Definitions

• the invention relates to absorbents for blood and other serous body fluids which are suitable for use in disposable absorbent products for surgical or other medical purposes as well as for bandages.
• Starch-acrylonitrile-graft polymers US Pat. Nos. 3,997,484, 3,661,815, 4,155,888, 3,935,09
• gelatinized starch derivatives DE-OS 2 702 781
• starch-acrylamide Acrylamidopropanesulfonic acid graft polymer US-Ann. 955 827
• cellulose-based such as derivatives of alkyl or hydroxyalkyl cellulose (JA-PS 77 / 125.481), carboxyethyl cellulose (BE-PS 862 130, G3-PS 1 159 949) and produced on a polysaccharide basis (DE-OS 2 650 377).
• polyester absorbents known in the prior art When the polyester absorbents known in the prior art first come into contact with the blood, a skin forms on the drop of drops, which acts as a barrier against the penetration of the blood to the absorbent particles. The result is non-wetted absorbent particles and a drop of blood with firm skin that is filled with liquid blood on the inside.
• a partial improvement in the blood dispersibility of the absorbent has been achieved according to DE-OS 2 844 956 and EU-PS 0 009 977 in that a ' partially synthetic or fully synthetic absorbent in powder form subsequently with polyethers (DE-OS 2 844 956) or with Fatty alcohols, fatty acids or esters (EU-PS 0 009 977), mostly dissolved in organic solvents, is treated.
• the invention relates to an absorbent for blood and serous body fluids, which is characterized in that it consists of at least two components A and B, component A at least one water-swellable synthetic or natural polymer or copolymer and component B at least is an inorganic and / or organic compound which is present as a free-flowing powder at normal temperature and is water-soluble.
• Component A includes both the water-swellable polymers based on polysaccharides, such as cellulose, cellulose derivatives such as carboxymethyl cellulose, alkyl or hydroxyalkyl cellulose, starch and starch derivatives, and plant gum (xanthan gum, alginic acid) and their salts and the polymers or copolymers based on (meth) acrylic acid or (meth) acrylic acid derivatives are suitable, these being primarily the homo- or copolymers of acrylic, methacrylic, acrylamidomethylpropanesulfonic acid, the salts thereof Acids, the acrylic or methacrylic amide with each other or with vinyl pyrrolidone and / or vinyl acetate.
• the above polymers can be crosslinked by an at least bifunctional crosslinking agent so that they are only swellable but not soluble in water. All of these polymers are produced by known processes.
• Suitable as component B are water-soluble inorganic or organic compounds which are solid at room temperature and which are preferably a free-flowing powder.
• component B Particularly suitable as component B are the harmless water-soluble salts of inorganic or organic acids, which are solid at normal temperature, Powdery, health-friendly inorganic acids or organic mono- or polycarboxylic acids or low molecular weight polymeric carboxylic or sulfonic acids or those at normal temperature. solid, harmless derivatives of carboxylic acids, or mono- or oligosaccharides.
• the chlorides, bromides, iodides, sulfates, hydrosulfates, phosphates, hydrogen or dihydrogen phosphates, tetraborates, nitrogenates, carbonates or hydrogen carbonates are preferred as salts of inorganic acids which are harmless to health, and the salts as salts of organic carboxylic acids ze of acetic, formic, adipic, citric or tartaric acid or also the salts of low molecular weight polymeric carbonic or sulfonic acids with molar weights between 300 and 100,000, preferably 2,000 to 20,000, on the basis of Homo- or copolymers of unsaturated mono- or dicarboxylic acids, sulfonic acids, aldehydes, alcohols and (meth) acrylamide are used.
• Suitable salts are the ammonium, sodium, potassium, lithium, calcium, magnesium, zinc, aluminum or iron salts of inorganic or organic acid.
• the inorganic or organic acids themselves can also be used as component B.
• Suitable inorganic acids are boric acid or phosphoric acid.
• Suitable organic acids are mono- or polycarboxylic acids such as citric, non- or adipic acid or low molecular weight polymeric carboxylic or sulfonic acids with molecular weights between 300 and 100,000 g / mol, preferably between 2,000 and 20,000 g / mol based on homo- or copolymers of unsaturated mono- or dicarboxylic acids, sulfonic acids, aldehydes, alcohols and (meth-acrylic acid).
• water-soluble derivatives of carboxylic acid such as amides or diamides, which are solid at normal temperature, preferably acetamide, urea and urea derivatives such as thiourea, methyl or ethyl urea.
• mono- or oligosaccharides such as glucose, fructose, mannose or sucrose, are also suitable as component B.
• the absorbent consists of components A and B in a weight ratio of 25 to 98% by weight, preferably 50 to 90% by weight, of component A to 2 to 75% by weight, preferably 10 to 50 % By weight of component B.
• the mixing of the two components A and B can be carried out by dissolving component B in the monomer solution before the polymerization or by adding the component 5 t.e B at any point in the preparation in dry or dissolved form.
• the absorption medium according to the invention is suitable for the absorption and / or retention of blood and other serous body fluids, particularly for use in absorbent disposable products such as sanitary napkins, tampons or in absorbent products for surgical and medical use.
• the absorbent according to the invention is, depending on the intended use in an appropriate dosage, mostly sprinkled in or on a textile or paper base and fixed in or on the fabric by suitable measures.
• the absorbent according to the invention can contain fragrances, binders or other auxiliaries such as 0 e.g. Disinfectant that has the absorption properties
• the salts (component B) listed in Table 1 were mixed homogeneously in powder form to the products (component A) prepared in examples 1 to 6.
• the following test method was used to determine the speed of the distribution of blood in the absorbent and the amount of blood held by the absorbent:
• a plexiglass plate with a round cutout (0 40 mm) was placed on a filter paper template (0 45 mm), the absorbent to be tested was sprinkled into the opening and evenly distributed over the entire circular area. Then 0.5 ml of human blood was metered into the center of the circle and the time was measured in which the blood spot formed by the capillary forces reached a size of 20 ⁇ m. After 60 seconds, the tested sample was covered with filter paper (0.45 mm), loaded with a weight of 500 g (40 g / cm 2 ) and the amount of blood absorbed by the .absorbent was determined, the amount of the unused being Absorbent and the amount of blood that was absorbed by the filter paper pad and pad was taken into account. The results are summarized in Table 1.

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• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Dispersion Chemistry (AREA)
• Hematology (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Materials For Medical Uses (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)
• Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Applications Claiming Priority (2)

Publications (1)

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Cited By (6)

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Citations (7)

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• 1981
  • 1981-07-16 DE DE3128100A patent/DE3128100C2/de not_active Expired
• 1982
  • 1982-07-10 US US06/928,573 patent/US4693713A/en not_active Ceased
  • 1982-07-10 WO PCT/DE1982/000146 patent/WO1983000289A1/de not_active Ceased
  • 1982-07-10 US US07/629,095 patent/USRE33839E/en not_active Expired - Lifetime
  • 1982-07-10 DE DE8282106196T patent/DE3267907D1/de not_active Expired
  • 1982-07-10 EP EP82106196A patent/EP0071063B1/de not_active Expired
  • 1982-07-10 JP JP57502173A patent/JPS58501107A/ja active Granted
  • 1982-07-10 AT AT82106196T patent/ATE16891T1/de not_active IP Right Cessation

Patent Citations (7)

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