Anti-mud polycarboxylate water reducer as well as preparation method and application thereof
A technology of polycarboxylic acid and water-reducing agent, applied in the field of building admixtures, can solve the problems of affecting the use effect of water-reducing agent and concrete strength, inconvenient use of natural zeolite powder and water-reducing agent, and expensive vinyl cationic monomers, etc. , to achieve the effect of increasing water reduction effect, good binding force and effective coating
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[0030] Example 1
[0031] (1) Preparation of hydroxy silicone oil modified polyether: in a container equipped with a thermometer, agitator, nitrogen gas pipe and reflux condenser, add 50 parts of the chemical structure of HO-Si(CH 3 ) 2 O{Si(CH 3 ) 2 O} 3.2 Si(CH 3 ) 2 -OH hydroxy silicone oil, 100 parts of 3-methyl-3-butene-1-polyoxyethylene ether and 1 part of KRA-1, stir, and pass in nitrogen, raise the temperature to 100°C, and react at a constant temperature for 2 hours. After the reaction, it is cooled to 60° C. and discharged to obtain hydroxy silicone oil modified polyether 1.
[0032] (2) Preparation of esterified monomer: in a container equipped with a thermometer, agitator, nitrogen gas pipe and reflux condenser, add 100 parts of polyethylene glycol-200, 200 parts of 4,4-stilbene dicarboxylic acid, 6 parts of p-toluenesulfonic acid, 1 part of hydroquinone and 0.5 part of hydroquinone were stirred, and nitrogen was passed through, the temperature was raised to 90°C, and t...
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[0034] Example 2
[0035] (1) Preparation of hydroxy silicone oil modified polyether: In a container equipped with a thermometer, agitator, nitrogen gas pipe and reflux condenser, add 40 parts of the chemical structure of HO-Si(CH 3 ) 2 O{Si(CH 3 ) 2 O} 20.5 Si(CH 3 ) 2 -OH hydroxy silicone oil, 100 parts of allyl polyoxyethylene ether and 2 parts of KRA-2, stir, blow in nitrogen, raise the temperature to 110°C, and react at a constant temperature for 3 hours. After the reaction, it is cooled to 60°C and discharged to obtain hydroxy silicone oil modified polyether 2.
[0036] (2) Preparation of esterified monomer: In a container equipped with a thermometer, agitator, nitrogen gas pipe and reflux condenser, add 100 parts of polyethylene glycol-400, 180 parts of 4,4-stilbene dicarboxylic acid, 8 parts of p-toluenesulfonic acid, 1.5 parts of hydroquinone and 0.75 parts of hydroquinone were stirred, and nitrogen was passed through, the temperature was raised to 80° C., and the reaction...
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[0038] Example 3
[0039] (1) Preparation of hydroxy silicone oil modified polyether: In a container equipped with a thermometer, agitator, nitrogen gas pipe and reflux condenser, add 30 parts of the chemical structure of HO-Si(CH 3 ) 2 O{Si(CH 3 ) 2 O} 6.8 Si(CH 3 ) 2 -OH hydroxy silicone oil, 100 parts of 2-methylallyl polyoxyethylene ether and 0.5 parts of platinum supported on a supported catalyst on a silica solid carrier, stirring, and blowing in nitrogen, the temperature is raised to 100°C , Constant temperature reaction for 2h. After the reaction, it was cooled to 60°C and discharged to obtain hydroxy silicone oil modified polyether 3.
[0040] (2) Preparation of esterified monomer: in a container equipped with a thermometer, agitator, nitrogen gas pipe and reflux condenser, add 100 parts of polyethylene glycol-600, 220 parts of 4,4-stilbene dicarboxylic acid, 10 parts of p-toluenesulfonic acid, 2 parts of hydroquinone and 1 part of hydroquinone were subjected to esterific...
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