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Hydroxyalkylated chitosan solution

A technology of chitosan and hydroxyalkyl, which is applied in the field of hydroxyalkyl chitosan solution, can solve the problems of short pot life, high reactivity of cross-linking agent, weakening of chitosan properties, etc.

Inactive Publication Date: 2008-12-31
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the cross-linking agent known so far has high reactivity, so there are problems that the solution after mixing the cross-linking agent has a short pot life, and although the water resistance of the formed film is increased, the The properties of chitosan itself in the film are weakened, etc.

Method used

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  • Hydroxyalkylated chitosan solution
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  • Hydroxyalkylated chitosan solution

Examples

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Effect test

Embodiment 1

[0047] In the NMP of 80 mass parts, disperse the glyceryl chitosan of 10 mass parts (the deacetylation degree of raw material chitosan is 83%), add the salicylic acid of 10 mass parts in this dispersion liquid, then at room temperature Stir and dissolve for 4 hours, let stand overnight, then stir and dissolve at room temperature for 1 hour, and prepare 100 parts by mass of glycerinated chitosan solution.

Embodiment 2-21

[0049] As shown in Table 1, according to the same method as in Example 1, the viscosity of the acetic acid aqueous solution of 1 mass % of chitosan containing 1 mass % of chitosan as the raw material of glyceryl chitosan, the glyceryl chitosan Glycerylation degree and quality of polysaccharide, type and quality of organic acid, compounding ratio of glyceryl chitosan and organic acid, or type and quality of aprotic polar solvent Glycerylated chitosan of the present invention solution. In addition, the degree of deacetylation of chitosan used as a raw material was 83%. In addition, when glyceryl chitosan is difficult to dissolve under stirring at room temperature, a solution is prepared by heating and stirring.

[0050] The preparation methods of various solutions used as comparative examples are as follows.

Embodiment 22

[0083] Be coated on the polyimide film (10cm * 5cm) that thickness is 50 μm by the 5 mass % glycerolated chitosan solution (solution viscosity: 174mPa·s) of embodiment 14 by bar coater, The NMP solution was not found to have any repulsion, and it could be evenly coated on the surface hydrophobic polyimide film.

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Abstract

The invention discloses a hydroxyalkylated chitosan solution characterized by containing a hydroxylated chitosan and an organic acid or a derivative thereof in an aprotic polar solvent. Also disclosed is a method for coating a base characterized by comprising a step wherein the hydroxyalkylated chitosan solution is applied over the surface of a base, and another step wherein the thus-obtained base is heated at a temperature of not less than 100 DEG C for not less than one second. Consequently, there is provided a one-component chitosan derivative solution suitable for application to a hydrophobic or lipophilic surface, which is stable and not crosslinkable at room temperature. This chitosan derivative solution forms a chitosan coating film having excellent water resistance after being heated and dried. Also provided is a method for coating a base wherein such a solution is used.

Description

technical field [0001] The present invention relates to hydroxyalkylated chitosan solutions and their use. Background technique [0002] Chitosan is a naturally occurring polysaccharide produced industrially by deacetylation of chitin isolated from crustaceans such as shrimp or crab. The chitosan has functions such as film-forming, antibacterial, water-retaining, and cohesive capabilities. Therefore, it has been used in various fields as a functional polymer, and it has recently been used as a safe polymer that can impart these functions on various substrates. The application of function-imparting agents is constantly evolving. For example, Patent Document 1 discloses an aqueous base treatment agent containing chitosan and a metal compound. In addition, it is also widely used as a coating agent for imparting antibacterial properties to various films, nonwoven fabrics, and textile products. A preferred technique among these coating agents is a solution of chitosan or its d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08B05D7/14B05D7/24C08K5/09C09D105/08
CPCC08B37/003C08K5/092C09D105/08H01M4/0404H01M4/0409H01M4/621Y02E60/10C08L5/08C08K5/09B05D7/14
Inventor 土田真也小林诚幸山南隆德
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD