Method for preparing efficient polycarboxylate graft copolymer super plasticizer through microwave-assisting method

A graft copolymer and microwave-assisted technology is applied in the field of preparing polycarboxylate graft copolymer high-efficiency superplasticizers, which can solve the problems of poor dispersion retention ability and wide molecular weight distribution, and achieve excellent slump retention and slow release. performance, low dispersion index, superior performance
CN103497285AActive Publication Date: 2014-01-08CHINA UNIV OF MINING & TECH (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA UNIV OF MINING & TECH (BEIJING)
Publication Date
2014-01-08

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Abstract

The invention relates to a method for preparing an efficient polycarboxylate graft copolymer super plasticizer through the microwave-assisting method. The super plasticizer is formed by a polymer monomer A, a polymer monomer B, a polymer monomer C, a polymer monomer D, a polymer monomer E, a polymer monomer F and a polymer monomer G in a copolymerization mode. The method for preparing the efficient polycarboxylate graft copolymer super plasticizer through the microwave-assisting method comprises the steps that firstly, a certain temperature and a certain microwave radiation power are set; secondly, the polymer monomers are added in microwave radiation, and namely, a long polyether, polyester, and a heteroatom side chain is introduced to a polymer chain; thirdly, the pH value is neutralized and adjusted. The water-soluble polycarboxylate concrete super plasticizer prepared according to the method has the advantages of being high in water-reducing rate, small in disperse index of molecular weight, good in overall performance, and good in compatibility with cement. The water-soluble polycarboxylate concrete super plasticizer further has the advantages that synthesis is environmentally friendly, the synthesis period is short, the technology is simple, cost is low, the price is reasonable, and the water-soluble polycarboxylate concrete super plasticizer is suitable for popularization and application.
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Description

technical field

[0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a method for preparing high-efficiency superplasticizers of polycarboxylic acid graft copolymers by using a microwave-assisted method. Background technique

[0002] With the vigorous development of my country's construction industry, the output of domestic ready-mixed concrete has increased year by year. The country's key engineering projects are also an important reason for stimulating the production of ready-mixed concrete. The implementation of strategies such as "Development of the West", "Revitalization of the Northeast Old Industrial Base", and "Rise of Central China" has stimulated local economic growth and infrastructure construction. my country's concrete development has made great progress so far, but the proportion of ready-mixed concrete in the total concrete is not high, and there is a gap compared with other countries in the world. At prese...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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