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Hydrolysis type polycarboxylate superplasticizer suitable for machine-made sand and preparation method of hydrolysis type polycarboxylate superplasticizer
The invention discloses a hydrolytic polycarboxylate superplasticizer and a preparation method thereof, the preparation method comprises the following steps: step 1, maleic anhydride and a p-phenylene glycol compound are subjected to an esterification reaction to synthesize a phenyl-containing compound connected through an ester functional group; 2, carrying out anionic polymerization reaction on the phenyl-containing compound obtained in the step 1 and ethylene oxide under an alkaline condition to synthesize an ethoxylated polymer containing unsaturated double bonds; and step 3, carrying out free radical copolymerization reaction on the ethoxylated polymer obtained in the step 2 and unsaturated carboxylic acid under the condition of an organic free radical initiator through a bulk polymerization method to prepare the hydrolytic polycarboxylic acid water reducer. According to the prepared hydrolytic polycarboxylic acid water reducing agent, under the alkaline condition of concrete, ester group functional groups can be hydrolyzed to generate carboxyl and phenyl-containing ethyoxyl compounds, adsorption consumption of the polycarboxylic acid water reducing agent is supplemented, retarding groups are provided, and the setting time of prefabricated concrete is prolonged.
本发明公开了一种水解型聚羧酸减水剂及其制备方法，该制备方法包括如下步骤：步骤一，马来酸酐与对苯二醇类化合物进行酯化反应，合成通过酯基官能团连接的含有苯基的化合物；步骤二，将步骤一得到的含有苯基的化合物与环氧乙烷进行碱性条件下的阴离子聚合反应，合成含有不饱和双键的乙氧基化聚合物；步骤三，将步骤二得到的乙氧基化聚合物与不饱和羧酸在有机类自由基引发剂条件下，通过本体聚合方法，进行自由基共聚反应，制得水解型聚羧酸减水剂。本发明制备的水解型聚羧酸减水剂在混凝土的碱性条件下，酯基官能团可水解产生羧基和含苯基的乙氧基化合物，补充聚羧酸减水剂的吸附消耗和提供缓凝基团，延长预制混凝土的凝结时间。
Hydrolysis type polycarboxylate superplasticizer suitable for machine-made sand and preparation method of hydrolysis type polycarboxylate superplasticizer
The invention discloses a hydrolytic polycarboxylate superplasticizer and a preparation method thereof, the preparation method comprises the following steps: step 1, maleic anhydride and a p-phenylene glycol compound are subjected to an esterification reaction to synthesize a phenyl-containing compound connected through an ester functional group; 2, carrying out anionic polymerization reaction on the phenyl-containing compound obtained in the step 1 and ethylene oxide under an alkaline condition to synthesize an ethoxylated polymer containing unsaturated double bonds; and step 3, carrying out free radical copolymerization reaction on the ethoxylated polymer obtained in the step 2 and unsaturated carboxylic acid under the condition of an organic free radical initiator through a bulk polymerization method to prepare the hydrolytic polycarboxylic acid water reducer. According to the prepared hydrolytic polycarboxylic acid water reducing agent, under the alkaline condition of concrete, ester group functional groups can be hydrolyzed to generate carboxyl and phenyl-containing ethyoxyl compounds, adsorption consumption of the polycarboxylic acid water reducing agent is supplemented, retarding groups are provided, and the setting time of prefabricated concrete is prolonged.
本发明公开了一种水解型聚羧酸减水剂及其制备方法，该制备方法包括如下步骤：步骤一，马来酸酐与对苯二醇类化合物进行酯化反应，合成通过酯基官能团连接的含有苯基的化合物；步骤二，将步骤一得到的含有苯基的化合物与环氧乙烷进行碱性条件下的阴离子聚合反应，合成含有不饱和双键的乙氧基化聚合物；步骤三，将步骤二得到的乙氧基化聚合物与不饱和羧酸在有机类自由基引发剂条件下，通过本体聚合方法，进行自由基共聚反应，制得水解型聚羧酸减水剂。本发明制备的水解型聚羧酸减水剂在混凝土的碱性条件下，酯基官能团可水解产生羧基和含苯基的乙氧基化合物，补充聚羧酸减水剂的吸附消耗和提供缓凝基团，延长预制混凝土的凝结时间。
Hydrolysis type polycarboxylate superplasticizer suitable for machine-made sand and preparation method of hydrolysis type polycarboxylate superplasticizer
一种适用于机制砂的水解型聚羧酸减水剂及其制备方法
ZHU WEILIANG (author) / SHAO YUEFENG (author)
2022-10-04
Patent
Electronic Resource
Chinese
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
| European Patent Office | 2022
| European Patent Office | 2020
| European Patent Office | 2023