Preparation technique of polybasic esterification starch

Abstract

The invention belongs to the technical field of textile size, and particularly relates to a preparation technique of polybasic esterified starch. The preparation technique includes three parts of acidolysis reaction, etherification reaction and esterification reaction; firstly, native starch and hydrochloric acid are subjected to acidolysis reaction in an acidification tank to obtain acidified starch; then the acidified starch is transferred into an etherification tank, sprayed with liquid 3-chloroethene hydroxyl trimethyl ammonium chloride and liquid caustic soda, and subjected to etherification reaction under alkaline conditions to obtain etherified starch; and then sodium dihydrogen phosphate, urea and phosphoric acid are diluted into mixed solution and sprayed into the etherified starch for esterification reaction to obtain the polybasic esterified starch. The polybasic esterified starch prepared by the preparation technique has the following beneficial effects of transparent and stable grout, good miscibility with other size, low grout viscosity, excellent adhesion, good permeability, stable grout viscosity, very high abrasive resistance of sizing, and good flexibility of serous membranes, improves weaving efficiency, and reduces production cost.

Description

technical field [0001] The invention belongs to the technical field of textile size, in particular to a preparation process of polyesterified starch. Background technique [0002] PVA size is currently the preferred size used in textile enterprises, but with the improvement of environmental protection requirements, the use of PVA size is facing some specific problems, especially the Achilles heel of PVA "non-environmental protection", known as "Unclean slurry", some European countries have banned the import of gray cloth containing PVA slurry. Therefore, people have been looking for a size to replace PVA, and the new size that is expected to replace PVA—modified starch size, currently has problems such as variety and single function, such as phosphate starch, oxidized starch, acid-modified starch, etc. , The quality of sizing after use is not satisfactory, and it is still unable to replace PVA size. In order to make the modified starch size achieve high concentration, low ...

AI Technical Summary

Problems solved by technology

Therefore, people have been looking for a size to replace PVA, and a new size that is expected to replace PVA—modified starch size, currently has problems such as variety and single function, such as phosphate starch, oxidized starch, acid-modified starch, etc. , the quality of sizing after use is not satisfactory, and it is still unable to replace PVA size