A mud-resistant polycarboxylate water reducer, its preparation method and use method

A technology of polycarboxylate and water reducer, which is applied in the field of mud-resistant polycarboxylate water reducer, which can solve the problems of high sensitivity to aggregate mud content, reduced strength of hardened concrete, and reduced water-reducing and dispersing ability. , to achieve the effects of avoiding adverse effects, convenient operation, and low raw material cost
CN105776933BActive Publication Date: 2017-09-19SHANGHAI DONGDA CHEM
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI DONGDA CHEM
Publication Date
2017-09-19

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Abstract

The invention discloses a mud-resistant polycarboxylate water reducer, a preparation method and a use method thereof. The anti-mud type polycarboxylate water reducer is made of the following raw materials: 100 parts of isopentenol polyoxyethylene ether, 9 to 13 parts of monomer A, 0 to 6 parts of monomer B, 0 parts of monomer C ~4 parts, 0~2 parts of amino trimethylene phosphonic acid, 1~3 parts of maleic anhydride, 1~2 parts of monomer D, 1~2 parts of initiator, 0~1 part of sodium hypophosphite, 0.4 parts of chain transfer agent ~1.6 parts, 3~7 parts of pH regulator and 140~160 parts of water. The anti-mud type polycarboxylate water reducer prepared by the preparation method of the present invention can be used when the aggregate mud content is high, avoiding the adverse effect of the aggregate mud content on the polycarboxylate water reducer in ready-mixed concrete. Impact; raw material cost is low, performance is good; at the same time, the preparation method and use method of the anti-mud type polycarboxylate superplasticizer of the present invention, the process is simple, the operation is convenient, and the application range is wide.
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Description

technical field

[0001] The invention relates to a mud-resistant polycarboxylate water reducer, a preparation method and a use method thereof. Background technique

[0002] Concrete water reducer is the most important additive in the concrete industry, and its development history can be divided into three generations: the first generation of water reducer (1930s): lignosulfonate and sodium rosinate, stearic acid soap class and other water reducing agents. Its water reducing rate is low, and it has a certain retarding and air-entraining effect. Excessive dosage will seriously affect the performance of concrete. The second generation of water reducer (1960s): naphthalene, melamine and other water reducers. It has high water-reducing rate, no air-entrainment, no retardation, and good reinforcement effect. Excessive dosage has little effect on concrete performance. , melamine and other raw materials are harmful to human body and environment. The third generation of water redu...

Claims

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