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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: 2011-01-19
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
  • Hydroxyalkylated chitosan solution
  • Hydroxyalkylated chitosan solution

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Disperse 10 parts by mass of glyceryl chitosan (the degree of deacetylation of raw chitosan is 83%) in 80 parts by mass of NMP, add 10 parts by mass of salicylic acid to the dispersion, and then at room temperature Stir and dissolve for 4 hours, and after standing overnight, stir and dissolve at room temperature for 1 hour to prepare 100 parts by mass of glyceryl chitosan solution.

Embodiment 2-21

[0049] As shown in Table 1, according to the same method as in Example 1, the viscosity of a 1% by mass aqueous acetic acid solution containing 1% by mass of chitosan as a raw material for glyceryl chitosan was changed. The degree and quality of glycerolation of glycans, the types and quality of organic acids, the mixing ratio of glyceryl chitosan and organic acids, or the types and quality of aprotic polar solvents of the glyceryl chitosan of the present invention Solution. In addition, the degree of deacetylation of the raw material chitosan used was 83%. In addition, when glyceryl chitosan is difficult to dissolve under stirring at room temperature, the solution is prepared by heating and stirring.

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

Embodiment 22

[0083] The 5 mass% glyceryl chitosan solution (solution viscosity: 174mPa·s) of Example 14 was coated on a polyimide film (10cm×5cm) with a thickness of 50μm by a bar coater, The NMP solution has not been found to have any repellency, and can be uniformly coated on a polyimide film with a hydrophobic surface.

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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 invention relates to a hydroxyalkylated chitosan solution and its use. Background technique [0002] Chitosan is a naturally occurring polysaccharide, which is industrially produced by deacetylating chitin isolated from crustaceans such as shrimp or crab. The chitosan has functions such as film-forming properties, antibacterial properties, water retention, and cohesive ability. Therefore, it has been used in various fields as a functional polymer, especially recently on various substrates as a safe product that can impart these functions. The application of function-imparting agents is constantly developing. For example, Patent Document 1 discloses an aqueous substrate treatment agent containing chitosan and a metal compound. In addition, it is also widely used as an antibacterial coating agent for various films, non-woven fabrics and textile products. A preferred technique among these coating agents is a solution of chitosan or its derivative using ...

Claims

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Application Information

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