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Preparation method of water-reducing shrinkage-reducing agent
The invention discloses a preparation method of a water-reducing shrinkage-reducing agent. The preparation method comprises the following steps: S1. carrying out esterification reaction on unsaturated carboxylic acid or anhydride and a micromolecular alcohol monomer at constant temperature of 120-130 DEG C for 4-7 h under the action of a catalyst, a water-carrying agent and a polymerization inhibitor, and carrying out reduced pressure distillation to obtain a shrinkage-reducing monomer; s2, carrying out esterification reaction on unsaturated carboxylic acid or anhydride and hydroxyl-terminated silane for 6-12 h at the constant temperature of 110-130 DEG C under the action of the catalyst, the water-carrying agent and the polymerization inhibitor, and carrying out reduced pressure distillation to obtain a defoaming monomer; s3, performing free radical polymerization on the unsaturated carboxylic acid, the unsaturated macromonomer, the shrinkage-reducing monomer and the defoaming monomer for 4-7h at the constant temperature of 60-75 DEG C under the action of the initiator and a chain transfer agent; and S4, adjusting the pH value to 5-6 with alkali liquor, and adding water to obtain the water-reducing shrinkage-reducing agent with different mass concentrations.
本发明公开了一种减水型减缩剂的制备方法，包括以下步骤：S1、将不饱和羧酸或者酸酐与小分子醇单体在催化剂、带水剂、阻聚剂的作用下，恒温120℃~130℃进行酯化反应4h~7h，减压蒸馏后得到减缩单体；S2、将不饱和羧酸或者酸酐与端羟基硅烷在催化剂、带水剂和阻聚剂的作用下，恒温110℃~130℃进行酯化反应6h~12h，减压蒸馏后得到消泡单体；S3、将不饱和羧酸、不饱和大单体、减缩单体和消泡单体在引发剂、链转移剂的作用下，恒温60℃~75℃自由基聚合4h~7h；S4、用碱液调整pH值为5~6，加水得到不同质量浓度的减水型减缩剂。
Preparation method of water-reducing shrinkage-reducing agent
The invention discloses a preparation method of a water-reducing shrinkage-reducing agent. The preparation method comprises the following steps: S1. carrying out esterification reaction on unsaturated carboxylic acid or anhydride and a micromolecular alcohol monomer at constant temperature of 120-130 DEG C for 4-7 h under the action of a catalyst, a water-carrying agent and a polymerization inhibitor, and carrying out reduced pressure distillation to obtain a shrinkage-reducing monomer; s2, carrying out esterification reaction on unsaturated carboxylic acid or anhydride and hydroxyl-terminated silane for 6-12 h at the constant temperature of 110-130 DEG C under the action of the catalyst, the water-carrying agent and the polymerization inhibitor, and carrying out reduced pressure distillation to obtain a defoaming monomer; s3, performing free radical polymerization on the unsaturated carboxylic acid, the unsaturated macromonomer, the shrinkage-reducing monomer and the defoaming monomer for 4-7h at the constant temperature of 60-75 DEG C under the action of the initiator and a chain transfer agent; and S4, adjusting the pH value to 5-6 with alkali liquor, and adding water to obtain the water-reducing shrinkage-reducing agent with different mass concentrations.
本发明公开了一种减水型减缩剂的制备方法，包括以下步骤：S1、将不饱和羧酸或者酸酐与小分子醇单体在催化剂、带水剂、阻聚剂的作用下，恒温120℃~130℃进行酯化反应4h~7h，减压蒸馏后得到减缩单体；S2、将不饱和羧酸或者酸酐与端羟基硅烷在催化剂、带水剂和阻聚剂的作用下，恒温110℃~130℃进行酯化反应6h~12h，减压蒸馏后得到消泡单体；S3、将不饱和羧酸、不饱和大单体、减缩单体和消泡单体在引发剂、链转移剂的作用下，恒温60℃~75℃自由基聚合4h~7h；S4、用碱液调整pH值为5~6，加水得到不同质量浓度的减水型减缩剂。
Preparation method of water-reducing shrinkage-reducing agent
一种减水型减缩剂的制备方法
WANG XIAOYING (author) / WANG QIAN (author) / MA JIANFENG (author) / REN JIANBO (author) / SONG XIAOXIAN (author) / YU LEI (author) / TIAN JING (author) / HUANG TIANYONG (author) / ZHOU YULUN (author)
2021-04-06
Patent
Electronic Resource
Chinese
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