Method for preparing printing paste of compound modified starch with adjustable viscosity

A technology for printing paste and modified starch, applied in the field of modified starch, can solve the problems of large viscosity change, difficult to control viscosity, troublesome application, etc., and achieve the effects of convenient preparation, reduced printing cost and short paste wire

Inactive Publication Date: 2005-01-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sodium alginate and carboxymethyl starch are different types of fluids. Sodium alginate is a Newtonian fluid with good dilution resistance. Carboxymethyl starch is a pseudoplastic fluid with a large change in viscosity when diluted, which is difficult to control during application. The required viscosity will bring some troubles to the application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The synthesis of carboxymethyl starch uses starch as a raw material and ethanol as a reaction medium to prepare a starch emulsion with a mass percentage concentration of 30-50%, adding a monochloroacetic acid etherifying agent accounting for 4-10% of the starch mass, and using The pH is adjusted by alkali, the etherification reaction is carried out in the range of pH 8.5-13, the etherification temperature is 40°C, the etherification time is 2 hours, the feeding and reaction are all carried out under stirring, and the reaction product is carboxymethyl starch.

[0021] Cross-linking—synthesis of carboxymethyl starch, using starch as raw material and ethanol as reaction medium to prepare a starch emulsion with a mass percentage concentration of 30-50%, adding sodium trimetaphosphate accounting for 0.3-3% of the starch mass, Add monochloroacetic acid etherification agent accounting for 4-10% of the starch mass, adjust the pH with alkali, and carry out cross-linking-etherific...

Embodiment 2

[0024] The cross-linking agent uses phosphorus oxychloride instead, and all the other conditions are the same as in Example 1.

Embodiment 3

[0026] Carboxymethyl starch: cross-linking-carboxymethyl starch composite mass percentage is 70%: 30%, and other conditions are the same

[0027] Example 1.

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PUM

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Abstract

This invention is a productive method of printing paste, it is a complex starch its viscosity is adjustable. It contains: Carboxymethylated starch, and inter-connected carboxymethylated starch, and complex them to produce it. This complex starch is a complex denaturation starch use to reactive dyes, its adjustable viscosity range may be expanded, be useful to printing and starching.

Description

technical field [0001] A preparation method and application of a compound modified starch printing paste with adjustable viscosity. The printing paste is a compound modified starch obtained by compounding carboxymethyl starch and crosslinked-carboxymethyl starch, which belongs to the technology of modified starch field. Background technique [0002] Printing paste is a polymer compound that acts as a thickener in printing paste. Generally, it can be dissolved in water or fully swelled and dispersed in water to form a thick colloidal solution. As the main component of printing paste, it determines the running performance of printing, the amount of color given to the surface of the dye, the smoothness of the outline of the pattern, etc. Commonly used printing pastes include sodium alginate, dragon gum, gum arabic, etc., but they are more expensive. Therefore, it is very necessary to find a product with similar performance and moderate price. [0003] Carboxymethyl starch is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/46
Inventor 顾正彪洪雁李兆丰
Owner JIANGNAN UNIV
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