A kind of preparation method of in-situ polymerization solid thickener

Abstract

The invention discloses a preparation method of an in-situ polymerized solid thickener, which comprises the following steps: premixing an aqueous solution of methacrylic acid salt, an acrylate and polyurethane associative macromonomer, an emulsifier, and an aqueous solution of an initiator; Spray adsorption on the carrier powder; age at room temperature for 2-4 hours, gradually heat up to 70-95°C in the powder equipment, and vacuumize at 95-100°C for 0.5-1 hour; cool down to below 40°C, pass the test Afterwards, it can be obtained by crushing, screening and discharging. The in-situ polymerized solid thickener prepared by the present invention is a new type of solid thickener, which has the characteristics of environmental protection, safety, excellent performance, stable storage, and convenient transportation. It improves the types of domestic thickener products; the preparation of the present invention The method has simple process and is easy to realize large-scale production.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a preparation method of an in-situ polymerized solid thickener. Background technique [0002] Due to the development of science and technology, various building materials are changing with each passing day. In recent years, the trend of water-based and powder-based has led the mainstream of the market. Most dry powder mortar and dry powder putty need thickeners to thicken during production and use. There are many kinds of thickeners, mainly including solid thickeners, natural organic thickeners and liquid thickeners, among which solid thickeners are mainly inorganic thickeners, such as bentonite, attapulgite, etc.; natural organic thickeners Agents such as modified starch, modified cellulose, etc.; liquid thickeners such as emulsion thickeners, polyurethane thickeners, etc. Although liquid thickeners have the advantages of high cost performance and stable performance, t...

AI Technical Summary

Problems solved by technology

Although the liquid thickener has the advantages of high cost performance and stable performance, it is inconvenient to use in the production process, and the market strongly needs to change the existing liquid thickener into a solid thickener.

[0003] To change the liquid thickener into a solid thickener, the conventional preparation method is to synthesize the liquid thickener first, and then prepare the solid thickener through spray drying and other processes. Large, the dissolution rate is slow when used, especially the alkali-swellable associative thickener, which cannot be neutralized with alkali during synthesis, and the water solubility is poor after drying, and it is difficult to penetrate when neutralizing with alkali in the later stage. lead to poor performance