High performance cold rolling stack scouring agent and preparation method

Abstract

The invention provides a high-performance cold pad-batch scouring agent and its preparation method, which is characterized in that its structure molecular formula is CH-O(EO)n(PO)m-H, and it has the following formulation: 1mol of R(R')CH-O(EO)n(PO)m-H, 1-1.2mol of maleic anhydride, 0.05-1% of catalyst-composite organic acid by weight, 1-1.2mol of anhydrous sodium sulfite; the preparation method comprises an esterification reaction comprising adding low carbon alcohol EO/PO polyether, maleic anhydride and catalyst into a reactor, stirring and heating in nitrogen, timely sampling and measuring acid value until reaction termination; and a sulphonation reaction comprising reacting the resultant of the esterification reaction with sodium sulfite solution, adding nitrogen, stirring and heating to temperature of 40-85 DEG C until reaction termination when sulphonation rate variation is less than 0.5% per hour. The scouring agent of the invention can be resistant to high-concentration alkali liquor, make scouring and bleaching liquor permeate quickly, has good emulsification and dispersion ability, and good ability to adsorb or solubilize decomposed reaction product, thereby the scoured and bleached cloth acquires good capillary effect and whiteness.

Description

technical field [0001] The invention belongs to the technical field of additives used in the pretreatment process of cold pad-batch printing and dyeing, and in particular relates to a high-performance cold-pad-batch scouring agent and a preparation method thereof. Background technique [0002] The pretreatment process of cold pad batch printing and dyeing is a pretreatment process that combines the traditional three processes of annealing, boiling, and bleaching into one bath at room temperature. This process has the advantages of short process route, simple equipment, and low energy consumption. , Suitable for small batches, multi-variety requirements, etc., especially for removing wrinkles, scratches, curling and other defects that are easy to occur in traditional crafts. Cold pad batch scouring agent is an important additive used in the pretreatment process of cold pad batch. Compared with the conventional process, the cold pad-batch process has low temperature and high ...

AI Technical Summary

Problems solved by technology

These two types of anionic surfactants have the disadvantage that the alkali resistance of a single component is acceptable, but after being compounded into a cold pad batch scouring agent, the comprehensive cold pad batch scouring effect is not good.

Moreover, the composition of isomeric alcohol phosphate salts will also leave a part of inorganic phosphorus, which is not good for the environment