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Preparation method of initiator for polycarboxylate superplasticizer polyether macromonomer
The invention discloses a preparation method of an initiator for a polycarboxylate superplasticizer polyether macromonomer. The method comprises the following steps: by taking neopentyl glycol and acetylene as reaction raw materials and an alkali metal catalyst as a catalyst, carrying out addition reaction on the reaction raw materials under the catalyst, and carrying out reduced pressure distillation on the obtained product to obtain the initiator monovinyl neopentyl glycol ether for the polycarboxylate superplasticizer polyether macromonomer. The monovinyl neopentyl glycol ether has the condensation reaction with ethylene oxide under the action of a basic catalyst, and glacial acetic acid or phosphoric acid is added for neutralization after the reaction is finished to obtain neopentyl glycol monovinyl polyoxyethylene ether which is suitable for the polycarboxylate superplasticizer polyether macromonomer. The monovinyl neopentyl glycol ether obtained by the invention is used for the polycarboxylate superplasticizer vinyl ether macromonomer and has better wrapping property and winding property, so that the synthesized polycarboxylate superplasticizer has the characteristics of lower doping amount and better adaptability.
本发明公开了一种聚羧酸减水剂聚醚大单体用起始剂的制备方法，该方法以新戊二醇和乙炔作为反应原料，碱金属类催化剂作为催化剂，在该催化剂下反应原料进行加成反应，所得产物经过减压蒸馏，制得聚羧酸减水剂聚醚大单体用起始剂单乙烯基新戊二醇醚；单乙烯基新戊二醇醚在碱性催化剂作用下与环氧乙烷进行缩合反应，反应结束加入冰醋酸或磷酸中和后，得到新戊二醇单乙烯基聚氧乙烯醚，适用于聚羧酸减水剂聚醚大单体；本发明得到的单乙烯基新戊二醇醚用作聚羧酸减水剂乙烯醚类大单体具有更好的包裹性和缠绕性，从而使合成出来的聚羧酸减水剂具有掺量更低、适应性更好的特点。
Preparation method of initiator for polycarboxylate superplasticizer polyether macromonomer
The invention discloses a preparation method of an initiator for a polycarboxylate superplasticizer polyether macromonomer. The method comprises the following steps: by taking neopentyl glycol and acetylene as reaction raw materials and an alkali metal catalyst as a catalyst, carrying out addition reaction on the reaction raw materials under the catalyst, and carrying out reduced pressure distillation on the obtained product to obtain the initiator monovinyl neopentyl glycol ether for the polycarboxylate superplasticizer polyether macromonomer. The monovinyl neopentyl glycol ether has the condensation reaction with ethylene oxide under the action of a basic catalyst, and glacial acetic acid or phosphoric acid is added for neutralization after the reaction is finished to obtain neopentyl glycol monovinyl polyoxyethylene ether which is suitable for the polycarboxylate superplasticizer polyether macromonomer. The monovinyl neopentyl glycol ether obtained by the invention is used for the polycarboxylate superplasticizer vinyl ether macromonomer and has better wrapping property and winding property, so that the synthesized polycarboxylate superplasticizer has the characteristics of lower doping amount and better adaptability.
本发明公开了一种聚羧酸减水剂聚醚大单体用起始剂的制备方法，该方法以新戊二醇和乙炔作为反应原料，碱金属类催化剂作为催化剂，在该催化剂下反应原料进行加成反应，所得产物经过减压蒸馏，制得聚羧酸减水剂聚醚大单体用起始剂单乙烯基新戊二醇醚；单乙烯基新戊二醇醚在碱性催化剂作用下与环氧乙烷进行缩合反应，反应结束加入冰醋酸或磷酸中和后，得到新戊二醇单乙烯基聚氧乙烯醚，适用于聚羧酸减水剂聚醚大单体；本发明得到的单乙烯基新戊二醇醚用作聚羧酸减水剂乙烯醚类大单体具有更好的包裹性和缠绕性，从而使合成出来的聚羧酸减水剂具有掺量更低、适应性更好的特点。
Preparation method of initiator for polycarboxylate superplasticizer polyether macromonomer
一种聚羧酸减水剂聚醚大单体用起始剂的制备方法
ZHANG RUITAO (author) / XU GENGYOU (author) / CHEN FENG (author) / SI HONGZHEN (author) / ZENG JUN (author) / SONG NANJING (author) / YAO JIE (author)
2021-10-22
Patent
Electronic Resource
Chinese
IPC:
C07C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
,
Acyclische oder carbocyclische Verbindungen
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C04B
Kalk
,
LIME
/
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
/
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
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