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Preparation method of benzene ring-containing sulfonic block modified polycarboxylic acid slump retaining agent
The invention relates to a preparation method of a benzene ring-containing sulfonic block modified polycarboxylic acid slump retaining agent. The polycarboxylic acid slump retaining agent is preparedby adopting a block polymerization method. The preparation method comprises the following steps: copolymerizing a benzene ring-containing monomer and a sulfonic acid monomer under certain conditions to obtain a benzene ring sulfonic block polymer i; the preparation method comprises the following steps: copolymerizing a polyether macromonomer and acrylic acid at normal temperature to obtain a blockpolymer ii, adjusting the ratio of the block polymer i to the block polymer ii, and opening double bonds to prepare the polycarboxylic acid slump retaining agent with the block copolymer by taking hydroxyethyl acrylate as a linking monomer. The polycarboxylic acid slump retaining agent prepared by the invention is prepared by adopting a block method for modification, strong anion groups such as steric hindrance and sulfo groups in a short side chain region are increased by benzene rings to provide anchoring groups, and unsaturated alkyl ester and acrylic acid are connected with a block polymer, so that the water reducing agent has relatively strong slump retaining performance and lasting slurry fluidity.
本发明涉及一种含苯环磺酸基嵌段改性聚羧酸保坍剂的制备方法，采用嵌段聚合法制备聚羧酸保坍剂，以含苯环类单体和磺酸类单体在一定条件下发生共聚得到苯环磺酸基嵌段聚合物ⅰ，以聚醚大单体和丙烯酸常温下共聚得嵌段聚合物ⅱ，调整嵌段聚合物ⅰ和ⅱ的比例，以丙烯酸羟乙酯为衔接单体，打开双键与嵌段共聚物制备聚羧酸保坍剂。本发明制备的聚羧酸保坍剂采用嵌段法改性制备，以苯环增加短侧链区的空间位阻，磺酸基等强阴离子基团提供锚固基团，以不饱和烷基酯和丙烯酸衔接嵌段聚合物，使减水剂具有较强的保坍性能和持久的浆体流动度。
Preparation method of benzene ring-containing sulfonic block modified polycarboxylic acid slump retaining agent
The invention relates to a preparation method of a benzene ring-containing sulfonic block modified polycarboxylic acid slump retaining agent. The polycarboxylic acid slump retaining agent is preparedby adopting a block polymerization method. The preparation method comprises the following steps: copolymerizing a benzene ring-containing monomer and a sulfonic acid monomer under certain conditions to obtain a benzene ring sulfonic block polymer i; the preparation method comprises the following steps: copolymerizing a polyether macromonomer and acrylic acid at normal temperature to obtain a blockpolymer ii, adjusting the ratio of the block polymer i to the block polymer ii, and opening double bonds to prepare the polycarboxylic acid slump retaining agent with the block copolymer by taking hydroxyethyl acrylate as a linking monomer. The polycarboxylic acid slump retaining agent prepared by the invention is prepared by adopting a block method for modification, strong anion groups such as steric hindrance and sulfo groups in a short side chain region are increased by benzene rings to provide anchoring groups, and unsaturated alkyl ester and acrylic acid are connected with a block polymer, so that the water reducing agent has relatively strong slump retaining performance and lasting slurry fluidity.
本发明涉及一种含苯环磺酸基嵌段改性聚羧酸保坍剂的制备方法，采用嵌段聚合法制备聚羧酸保坍剂，以含苯环类单体和磺酸类单体在一定条件下发生共聚得到苯环磺酸基嵌段聚合物ⅰ，以聚醚大单体和丙烯酸常温下共聚得嵌段聚合物ⅱ，调整嵌段聚合物ⅰ和ⅱ的比例，以丙烯酸羟乙酯为衔接单体，打开双键与嵌段共聚物制备聚羧酸保坍剂。本发明制备的聚羧酸保坍剂采用嵌段法改性制备，以苯环增加短侧链区的空间位阻，磺酸基等强阴离子基团提供锚固基团，以不饱和烷基酯和丙烯酸衔接嵌段聚合物，使减水剂具有较强的保坍性能和持久的浆体流动度。
Preparation method of benzene ring-containing sulfonic block modified polycarboxylic acid slump retaining agent
含苯环磺酸基嵌段改性聚羧酸保坍剂的制备方法
CHEN SHUDONG (author) / ZHANG YANFEI (author) / KE KAI (author) / YU JIANFENG (author) / ZHENG HAOYU (author) / YU LINGYI (author)
2020-04-24
Patent
Electronic Resource
Chinese
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