Preparation method of high-substituted-ratio carboxyl methyl guar printing gum

Abstract

The invention discloses a preparation method of high-substituted-ratio carboxyl methyl guar printing gum, which belongs to the technical field of modified guar. The preparation method comprises the steps of performing the procedures of atomizing alkalization, atomizing oxidization, etherification, cooling neutralization, drying, crushing screening and packaging on raw guar powders to obtain the high-substituted-ratio carboxyl methyl guar printing gum. According to the preparation method, the uniformity of a grafting group is ensured by virtue of high-efficiency atomizing and spraying; the high substituted ratio of a final product is ensured by virtue of semi-dry etherification, so that the difficulties of poor uniformity and low substituted ratio of the conventional carboxyl methyl vegetable glue are solved; and simultaneously, compared with the conventional wet processing, the preparation method is more environment-friendly and more economical. The product, namely the high-substituted-ratio carboxyl methyl guar printing gum, disclosed by the invention can partly or wholly replace sodium alga acid to be applied to printing of activated dyes and the printing process of other anionic dyes, and is equivalent to the sodium alga acid in the aspect of application effects of water solubility, color fastness, color yield, vividness, handfeeling and the like, thus serving as a good substitute of the sodium alga acid.

Description

technical field [0001] The invention relates to a method for preparing a high degree of substitution carboxymethyl guar gum printing paste, which belongs to the technical field of modified guar gum and can replace sodium alginate and be used in the fabric printing process of reactive and other anionic dyes. Background technique [0002] Printing paste is an important part of printing paste. It does not react during the printing process and mainly acts as a transfer medium. Its performance directly affects the quality and cost of printed products. At present, with the development of printing and dyeing technology, various synthetic thickeners with excellent performance have been widely used in actual production, but sodium alginate is still the most widely used as a traditional paste for reactive dye printing. However, with the further development and utilization of sodium alginate, especially in the food field, the price of sodium alginate began to skyrocket exponentially, w...

AI Technical Summary

Problems solved by technology

However, with the further development and utilization of sodium alginate, especially in the food field, the price of sodium alginate began to skyrocket exponentially, which made printing and dyeing enterprises feel huge cost pressure. There are also shortcomings such as long beating time, strong fluidity, and easy leakage. Domestic printing and dyeing auxiliaries manufacturers have tried to modify various vegetable gums with carboxymethyl, but they have not been able to solve the problem due to the grafting group. The fabric feels hard due to unevenness, so no mature domestic alternative products have been launched so far

At the same time, the solvent method, that is, the wet process, was mostly used for the modification of vegetable gums in the past, which caused serious waste of solvents and polluted the environment.

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