Solid polycarboxylate superplasticizer as well as preparation method therefor and use thereof

Abstract

A solid polycarboxylate superplasticizer, preparation method, and use. A monohydroxyl/monoamino polyoxyethylene ether or derivative thereof and unsaturated benzenesulfonic acid small monomer having the effects of crack resistance, shrinkage reduction and catalysis are added to a reactor at one time by a one-pot process, mixed and stirred, followed by vacuum dehydration under heating conditions or an esterification reaction under the introduction of a protective gas. After the reaction is completed and cooled, slicing or milling is performed to obtain the solid polycarboxylate superplasticizer. The superplasticizer has crack resistance and shrinkage reduction while ensuring initial dispersion performance. An organic solvent is not used, and a green environmental protection effect is achieved. The esterification rate is high, reaction conditions are mild, energy consumption is low, and operation steps are simple. The superplasticizer is easy to slice or mill and convenient to realize industrial production, with a good market prospect.

Dependencies are inferred from the claim text.