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AMPHOTERIC BETAINE-TYPE POLYCARBOXYLATE SUPERPLASTICIZER AND PREPARATION METHOD THEREOF
AMPHOTERIC BETAINE-TYPE POLYCARBOXYLATE SUPERPLASTICIZER AND PREPARATION METHOD THEREOF
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机译:两性甜菜碱型聚羧酸超塑化剂及其制备方法
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摘要
An amphoteric betaine-type polycarboxylic acid water reducer and a preparation method therefor are provided in the present invention. An unsaturated betaine-type monomer A and an acrylic acid-type polyethylene glycol monomer B are placed in a reaction container, stirred until uniform and then an acrylic acid-type monomer C is added, the stirring is continued and water is added to make adjustments so as to make the total mass of the monomers account for 10%-20% of the total mass of the aqueous solution; and under the protection of an inert gas, the temperature is raised to 60° C.-100° C., an aqueous initiator solution is added, maintaining the temperature and reacting for 4-6 h, and after the reaction is completed, the solution is cooled to room temperature, and the pH value thereof is adjusted to 5-7 to prepare the amphoteric betaine-type polycarboxylic acid water reducer.
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