Preparation of amphiprotic high molecular type surfactant for promoting papermaking rubber coating agent aging

Abstract

The invention discloses a method for preparing an amphoteric macromolecular surfactant with green and environment-friendly production process which is industrialized easily and can promote aging of sizing agent for papermaking. A monomer (a), a monomer (d) and a part of a monomer b are added in a reaction vessel accommodating solvent. Acid is used for adjusting PH value before the monomers are added or after the monomers are mixed. A reaction vessel is displaced with an inert gas before the reaction vessel is heated up to the temperature ranging from 40 DEG C to 95 DEG C. The monomer (c) and the remaining monomer (b) are added at a uniform speed while the mixture is stirred, and a primer is compounded. While the monomers are added, the temperature of the reaction vessel is controlled between 60 DEG C to 130 DEG C. After the primer is completed, the primer is aged for 0 to 120 minutes at the temperature of polymerization, and the temperature is reduced below 10 DEG C to 80 DEG C. PH value is adjusted. After a bacteria inhibitor is homogenized, the finished product is got. With excellent effects, low price, improved sizing speed, reduced dose level of the sizing agent, no weakening on the effect of a fluorescer, the product is innocuous to the ecological environment, and can be degraded easily in nature without increasing the difficulty to disintegrate paper.

Description

technical field [0001] The invention relates to a preparation method of an amphoteric macromolecule surfactant used to accelerate the aging of a papermaking sizing agent. Background technique [0002] In the paper industry, with the increasing scale of output, the high-speed and internal coating process of paper machines is gradually popularized, but the problem that arises is that the paper after gluing must be stored for a sufficient time (it takes a few hours or a few days, Especially high-grade paper using medium and alkaline sizing agent), until the sizing performance is fully developed, which conflicts with the above-mentioned high-speed and internal coating process of the paper machine, so sizing accelerator (also called sizing agent) was born Accelerator). At first, cationic homopolymers were used to achieve the sizing acceleration effect, but then it was found that this accelerator has a mutual weakening effect on the whitening effect of the fluorescent whitening a...

AI Technical Summary

Problems solved by technology

At first, cationic homopolymers were used to achieve the sizing acceleration effect, but then it was found that this accelerator has a mutual weakening effect on the whitening effect of the fluorescent whitening agent, and can only be applied to low-grade paper or non-white paper that does not need to be whitened , in Europe and the United States where the paper industry is relatively developed, this problem has been solved, and the corresponding products have also entered the domestic high-end market. The new problem that has emerged is that the expensive price significantly increases the cost of paper making and weakens the competitive advantage of high-grade paper.