Preparation of low-salt and low-viscosity polyacrylamide water-in-water dispersion by seed swelling method

A polyacrylamide and dispersion technology, which is applied in the field of water-soluble polymer dispersion synthesis, can solve the problems of high viscosity of water-in-water dispersion, unfavorable practical application, and increased system viscosity, so as to expand the scope of use and conditions of use , The degree of solution polymerization is low, and the effect of reducing the amount of inorganic salt
CN103435749BActive Publication Date: 2015-09-09JIANGSU SOBUTE NEW MATERIALS +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU SOBUTE NEW MATERIALS
Publication Date
2015-09-09

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Abstract

The invention belongs to the technical field of synthesis of water-soluble polymer dispersion, and particularly relates to a method for polymerizing anionic polyacrylamide water-in-water dispersion liquid. Preparation of low-salinity and low-viscosity polyacrylamide water-in-water dispersion liquid by employing a seed swelling method comprises the following steps: firstly, preparing a seed polymer (SP) by a copolymerization reaction, and then preparing the polyacrylamide water-in-water dispersion liquid by taking the prepared seed polymer (SP) as a raw material, wherein the molecular weight of the seed polymer (SP) is controlled at 1*10<6> to 3*10<6>. By adopting the method, low viscosity and stability of the system in the process of preparing the polyacrylamide water-in-water dispersion liquid can be effectively ensured; meanwhile, the dosage of inorganic salt is reduced. Thus, the condition that the prepared product has high molecular weight, high mobility and high storage stability is ensured.
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Description

technical field

[0001] The invention belongs to the technical field of water-soluble polymer dispersion synthesis, and in particular relates to a method for polymerizing an anionic polyacrylamide water-in-water dispersion. Background technique

[0002] The existing industrial production methods of polyacrylamide include solution polymerization, inverse suspension polymerization and inverse emulsion polymerization. The product obtained by the solution polymerization production method is a powder. Except for the high viscosity problem in the production process, it is similar to the reverse phase suspension polymerization. Since drying and granulation is required in the end, it is inevitable to introduce dry granulation equipment, which increases production costs. At the same time Dust is generated during production, and the final product still has problems such as difficulty in dissolving. However, inverse suspension polymerization and inverse emulsion polymerization use a la...

Claims

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