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Phosphate starch printing paste and preparation method thereof

A technology of printing paste and phosphate ester, which is applied in the field of textile dyeing and printing, and can solve problems such as narrow application fields, unsatisfactory performance, and low technical content of products

Inactive Publication Date: 2011-08-17
JIANGXI BODA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many varieties of modified starch in China, there are still some characteristics such as low technical content and unsatisfactory performance. The most important thing is that the application field is too narrow

Method used

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  • Phosphate starch printing paste and preparation method thereof
  • Phosphate starch printing paste and preparation method thereof
  • Phosphate starch printing paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Dissolve 6 parts of sodium dihydrogen phosphate, 6 parts of disodium hydrogen phosphate, 4 parts of urea, and 20 parts of water in a dissolving barrel with heating and stirring, and spray it into 100 parts of tapioca starch in stirring, After being fully mixed, it is slowly sent into the hot air reactor through a rotary conveyor, and the esterification reaction is carried out at 180°C for 45 minutes. Urea is used as a catalyst to fully mix tapioca starch, sodium dihydrogen phosphate, and disodium hydrogen phosphate. In the high-temperature airflow, the esterification reaction occurs rapidly, and a substituent-phosphate group is inserted on the hydroxyl group of the starch to obtain phosphate ester starch; while the esterification reaction of phosphate occurs, a small amount of triple partial is produced at a high temperature of 180 °C Sodium phosphate crosslinks starch to generate phosphodiester; while urea acts as a catalyst, it also reacts with tapioca starch to genera...

Embodiment 2

[0046] Dissolve 5 parts of sodium dihydrogen phosphate, 8 parts of disodium hydrogen phosphate, 3 parts of urea, and 20 parts of water in a dissolving barrel with heating and stirring, and spray it into 100 parts of tapioca starch in stirring, After being fully mixed, it is slowly sent into the hot air reactor through a rotary conveyor, and the esterification reaction is carried out at 180°C for 40 minutes. Urea is used as a catalyst to fully mix tapioca starch, sodium dihydrogen phosphate, and disodium hydrogen phosphate. In the high-temperature airflow, the esterification reaction occurs rapidly, and a substituent-phosphate group is inserted on the hydroxyl group of the starch to obtain phosphate ester starch; while the esterification reaction of phosphate occurs, a small amount of triple partial is produced at a high temperature of 180 °C Sodium phosphate crosslinks starch to generate phosphodiester; while urea acts as a catalyst, it also reacts with tapioca starch to genera...

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Abstract

The invention discloses a phosphate starch printing paste and a preparation method thereof. Cassava starch is utilized to be reacted with sodium dihydrogen phosphate and sodium hydrogen phosphate in hot air, and urea is adopted as a catalyst to produce phosphate starch. The sodium dihydrogen phosphate and the sodium hydrogen phosphate generate micro sodium metaphosphate at high temperature, and the sodium metaphosphate is crosslinked with the starch, thus the viscosity of the starch is improved. Simultaneously, the urea is used as the catalyst and in esterification with the starch so as to generate hydrophilic carbamic acid ester starch. The phosphate starch produced by adopting the method can be dissolved in cold water; the paste is transparent and has clean color and luster; the sodium metaphosphate is corsslinked with the starch, thus the viscosity and the viscosity stability of the starch are improved, the PVI (polyvinyl isobutyl ether) value is increased, and the preparation method is more suitable for being applied to the printing paste.

Description

technical field [0001] The invention relates to the fields of dyeing and printing of textiles, in particular to a phosphate starch printing paste. Background technique [0002] In recent years, the field of domestic modified starch has made great progress, from the point of view of the modification method. From the first generation of acid-modified starch, oxidized starch, through the second generation of phosphate starch, acetate starch, quaternary ammonium cationic starch, hydroxyethyl starch, hydroxypropyl starch, to the third generation of grafted starch, There are certain production and applications in the market. From the field of use, the main application fields are still papermaking, food and textile warp yarn sizing. The above three areas account for more than 95% of the domestic modified starch consumption. Although there are many varieties of modified starch in China, there are still some characteristics such as low technical content and unsatisfactory performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/06C08B31/02D06P1/48
Inventor 肖天辉
Owner JIANGXI BODA CHEM
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