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Oxidized cellulose-based material, method for obtaining same and use thereof as compress

a technology of oxidized cellulose and cellulose, applied in the field of solid materials, can solve the problems of difficult recycling, high cost, dangerous raw materials, etc., and achieve the effect of convenient transposal

Inactive Publication Date: 2015-05-28
SYMATESE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent involves a new method that uses cheap and easily available reactants that are better for the environment than NO2. When this method is applied to textiles, it creates a strong and flexible material that can be used as a compress. This method also results in a product that can stop bleeding and has absorption properties that make it ideal for use as a compress.

Problems solved by technology

However, such a technology requires expensive, dangerous raw materials, which are difficult to recycle, as well as a demanding installation.

Method used

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  • Oxidized cellulose-based material, method for obtaining same and use thereof as compress
  • Oxidized cellulose-based material, method for obtaining same and use thereof as compress
  • Oxidized cellulose-based material, method for obtaining same and use thereof as compress

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embodiment

OF EMBODIMENT

[0147]The invention and the resulting advantages will better appear from the non-limiting embodiments discussed hereafter.

[0148]These examples are based on fabrics made from knitted yarns of regenerated cellulose (or viscose), in crochet or jersey stitch.

I / Method of Obtaining the Solid Cellulosic Material:

[0149]1) First Step:

[0150]This step enables to partially oxidize the cellulose via the conversion of primary alcohol functions attached to the C6 carbon of the cellobiose units into carboxylic acid functions.

[0151]The general conditions of this step are described in Table 1 hereafter:

TEMPO (mole per gram offrom 0.0003 to 0.0006, for examplecellulose)0.0006NaClO (mole per gram offrom 0.0006 to 0.0049, for examplecellulose)0.0012NaClO2 (mole per gram offrom 0.006 to 0.025, for example 0.012cellulose)pH of the reaction mediumfrom 5 to 7, for example 5.8Temperature (° C.)60Duration of the reaction (h)from 1 to 6, typically from 4 to 5

[0152]Under a ventilator, 200 ml of a ...

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Abstract

The present invention relates to a method of obtaining a solid material based on a polymer having its cellobiose units exhibiting the following characteristics:at least some of the cellobiose units have at least one carboxylic acid function attached to the C6 carbon, the other C6 carbons having a primary alcohol function attached thereto; andat least some of the cellobiose units have at least one of the two rings open between the C2 and C3 carbons, the other C2 and C3 carbons forming a ring and having an alcohol function attached thereto.Such a material, advantageously a textile, may be used as a compress.

Description

FIELD OF THE INVENTION[0001]The present invention provides a novel solid material based on polymer containing at least partially oxidized cellobiose units, capable of being used in the medical field, particularly as a compress.[0002]Such a material, advantageously a textile, may be obtained by submitting a solid material based on a polymer containing cellobiose units to a method in at least two steps: placing it in contact with an oxidizing mixture comprising a hypohalite, a halite, and an oxo-ammonium salt or a precursor of said salt; placing in contact the material thus processed with a solution of periodic acid or of a salt thereof; and then, possibly, placing in contact the material thus processed with a halite.STATE OF THE ART[0003]Surgical haemostatic compresses, or compresses, should be haemostatic, absorbable, and easy to manipulate by surgeons. Such properties may be obtained due to textiles based on oxidized cellulose.[0004]As a reminder, cellulose is a homopolymer belongi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D06M11/30
CPCD06M11/30D10B2201/20D06M2101/06A61L15/28C08B15/04D06M11/64D06M13/355D06M13/388A61L15/64Y02P20/582Y10T428/249921C08L1/04C08L1/24
Inventor DAO, VITHUYMICHELOT, ROBERTHERBAGE, BENJAMINFUCHEZ, FABIENPEROUSE, ERIC
Owner SYMATESE
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