A kind of preparation method of colorless transparent sodium polyacrylate dispersant

Abstract

The invention discloses a preparation method of a colorless and transparent sodium polyacrylate dispersant. The low-molecular-weight polymerized acrylic acid is synthesized through light-assisted initiation of polymerization at the initial stage of polymerization. The polymerized acrylic acid is continuously irradiated with ultraviolet rays during the neutralization process with sodium hydroxide. light or visible light. Finally, a certain amount of benzoyl peroxide is added to the synthesized polymer to achieve the corresponding decolorization and antiseptic effects. The invention prepares a sodium polyacrylate dispersant, the sodium polyacrylate dispersant is in a colorless and transparent state, its chromaticity is excellent when tested by a spectrophotometer, and a good effect is achieved in the application field. The dispersant has simple preparation method, low cost, stable product performance and good dispersion performance.

Description

technical field

[0001] The invention relates to the field of polymer synthesis, in particular to a preparation method of colorless and transparent sodium polyacrylate.

[0002] technical background

[0003] Sodium polyacrylate dispersant is often used in papermaking, coatings, textiles, water treatment, agriculture, daily chemicals, civil engineering, ceramics, etc. In the process of use, most of the sodium polyacrylate dispersant aqueous solutions can be used directly. In most applications, due to the chromaticity requirements of downstream products, it is necessary to use colorless and transparent sodium polyacrylate dispersants. Often cheap acrylic acid raw materials on the market, including acrylic acid waste liquid, the polymerized products are often yellow or pink, which cannot meet the needs of downstream application industries and limit its application range in many fields. How to synthesize high-quality colorless and transparent products with cheap raw materials has...