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Cation modified slump-retaining polycarboxylate water reducing agent and block polymerization method thereof
The invention provides a cation-modified slump-retaining polycarboxylate water reducing agent and a block polymerization method thereof. The slump-retaining polycarboxylate water reducing agent is mainly prepared through the following operation steps that 1, preparing a phenyl cation block polymer I from benzene ring monomers and cation monomers at the temperature of 40-60 DEG C; 2, preparing a block polymer II from a polyether macromonomer and alkyl acrylate at normal temperature; 3, adding the block polymer I into the block polymer II, and respectively dropwise adding the material A and thematerial B at 40-50 DEG C; wherein the material A is a mixed solution of acrylic acid, alkyl acrylate and a chain transfer agent, the material B is an initiator solution c, and the polycarboxylic acidslump-retaining agent is prepared by cooling to room temperature. The polycarboxylic acid slump-retaining agent prepared by the method is prepared in a block polymerization manner, and is wide in adaptability and long in slump retaining duration.
本发明提供一种阳离子改性保坍型聚羧酸减水剂及其嵌段聚合方法，所述保坍型聚羧酸减水剂主要由以下操作步骤制备，步骤一：40‑60℃温度下以苯环类单体和阳离子单体制备苯基阳离子嵌段聚合物Ⅰ；步骤二：常温条件下以聚醚大单体和丙烯酸烷基酯制备嵌段聚合物Ⅱ；步骤三：将嵌段聚合物Ⅰ加入嵌段聚合物Ⅱ中，在40‑50℃分别滴加A、B料；其中A料为丙烯酸、丙烯酸烷基酯、链转移剂的混合液，B料为引发剂c溶液，冷却至室温制备聚羧酸保坍剂。本发明制备的聚羧酸保坍剂以嵌段聚合方式制备，适应性较广，保坍持续时间长。
Cation modified slump-retaining polycarboxylate water reducing agent and block polymerization method thereof
The invention provides a cation-modified slump-retaining polycarboxylate water reducing agent and a block polymerization method thereof. The slump-retaining polycarboxylate water reducing agent is mainly prepared through the following operation steps that 1, preparing a phenyl cation block polymer I from benzene ring monomers and cation monomers at the temperature of 40-60 DEG C; 2, preparing a block polymer II from a polyether macromonomer and alkyl acrylate at normal temperature; 3, adding the block polymer I into the block polymer II, and respectively dropwise adding the material A and thematerial B at 40-50 DEG C; wherein the material A is a mixed solution of acrylic acid, alkyl acrylate and a chain transfer agent, the material B is an initiator solution c, and the polycarboxylic acidslump-retaining agent is prepared by cooling to room temperature. The polycarboxylic acid slump-retaining agent prepared by the method is prepared in a block polymerization manner, and is wide in adaptability and long in slump retaining duration.
本发明提供一种阳离子改性保坍型聚羧酸减水剂及其嵌段聚合方法，所述保坍型聚羧酸减水剂主要由以下操作步骤制备，步骤一：40‑60℃温度下以苯环类单体和阳离子单体制备苯基阳离子嵌段聚合物Ⅰ；步骤二：常温条件下以聚醚大单体和丙烯酸烷基酯制备嵌段聚合物Ⅱ；步骤三：将嵌段聚合物Ⅰ加入嵌段聚合物Ⅱ中，在40‑50℃分别滴加A、B料；其中A料为丙烯酸、丙烯酸烷基酯、链转移剂的混合液，B料为引发剂c溶液，冷却至室温制备聚羧酸保坍剂。本发明制备的聚羧酸保坍剂以嵌段聚合方式制备，适应性较广，保坍持续时间长。
Cation modified slump-retaining polycarboxylate water reducing agent and block polymerization method thereof
一种阳离子改性保坍型聚羧酸减水剂及其嵌段聚合方法
CHEN SHUDONG (Autor:in) / YU JIANFENG (Autor:in) / KE KAI (Autor:in) / ZHANG YANFEI (Autor:in) / HE YUELAI (Autor:in) / FENG YUE (Autor:in)
24.04.2020
Patent
Elektronische Ressource
Chinesisch
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