A kind of alkali-soluble acrylate polymer composition and preparation method thereof

A technology of acrylate and linear polymers, which is applied in the field of polymer synthesis and can solve problems such as high turbidity, limited thickening ability, and large dosage
CN104448107BActive Publication Date: 2017-03-08GUANGZHOU TINCI MATERIALS TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU TINCI MATERIALS TECH
Publication Date
2017-03-08

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Abstract

The invention discloses an alkaline-soluble acrylate polymer composition, which is prepared from the raw material formula by emulsion polymerization. The alkaline-soluble acrylate polymer composition comprises the following components in percentage by weight: 8wt%-15wt% of an unsaturated carboxylic acid monomer as a monomer phase, 19wt%-28wt% of at least one C1-C10 alkyl ester of acrylic acid or methacrylic acid, 60wt%-70wt% of deionized water as a water phase, 1wt%-3wt% of a prepolymerized linear polymer, 0wt%-3wt% of protective colloid, 0.05wt%-1.0wt% of an emulsifier, 0.05wt%-0.2wt% of a cross-linking agent and 0.05wt%-0.5wt% of an initiator, wherein the number-average molecular weight is 10,000-100,000; and the cross-linking agent is added to a reaction system after 28%-58% of monomer phase is consumed. The invention aims at providing the alkaline-soluble acrylate polymer composition which is small in amount in the formula, good in suspending power in a low pH condition, high in thickening capacity, and good in transparency; and meanwhile, a preparation method of the alkaline-soluble acrylate polymer composition is also provided.
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Description

technical field

[0001] The invention belongs to the field of polymer synthesis, in particular to an alkali-soluble acrylate polymer with excellent thickening and suspension properties, high transparency, good thickening and suspension properties and good rheological properties even in a low pH range Compositions and methods for their preparation. Background technique

[0002] One class of liquid thickeners commonly used to thicken surface active aqueous systems are alkali-soluble / alkali-swellable emulsion polymers (ASE). It is insoluble in water until it is neutralized with alkali, and can only play its role as a rheology modifier if its pH value is adjusted above 6.5. Its rheological thickening mechanism is as follows: with the increase of pH value and the neutralization of carboxyl groups, the polymer molecules are hydrated, and the molecular chains expand under the action of the electrostatic repulsion of the anionic charge center of the carboxyl groups. Molecular chain...

Claims

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