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Solvent-free low-temperature ball-milling preparation method of solid polycarboxylic slump retaining agent
The invention relates to a solvent-free low-temperature ball-milling preparation method of a solid polycarboxylic slump retaining agent, which comprises the following steps: adding molten ethylene glycol vinyl polyoxyethylene ether, unsaturated carboxylic acid, acrylate, unsaturated amide and a chain transfer agent into a ball mill, closing a cover, opening an initiator feed valve, and adding halfof an initiator; opening a jacket chilled water valve of the ball mill while starting the ball mill for ball milling, and controlling the temperature to be 60+/-2 DEG C; adding the rest half of the initiator when ball milling is carried out for half of time, controlling the ball milling time to be 5-15 min, and after ball milling is finished, conveying a finished product to a cryogenic crusher through a discharging valve to crush and discharge the finished product. A solvent-free low-temperature ball milling method is adopted for bulk synthesis, the solid polycarboxylic acid slump retaining agent with the solid content reaching 98% or above can be prepared, and the prepared solid polycarboxylic acid slump retaining agent is basically consistent with similar products synthesized through atraditional intermittent kettle type aqueous solution method in performance.
本发明涉及一种固体聚羧酸系保坍剂的无溶剂低温球磨制备方法，包括以下步骤：将熔融态乙二醇乙烯基聚氧乙烯醚、不饱和羧酸、丙烯酸酯、不饱和酰胺和链转移剂加入球磨机并合盖，开启引发剂进料阀，加入一半的引发剂；然后在开启球磨机进行球磨的同时，开启球磨机夹套冷冻水阀门，控制温度为60±2℃；剩余一半引发剂在球磨进行一半时间时加入，球磨时间为5～15min，球磨结束后成品经放料阀到深冷粉碎机进行粉碎出料。本发明采用无溶剂低温球磨法进行本体合成，能制备固含量达到98％以上的固体聚羧酸系保坍剂，所制备的固体聚羧酸系保坍剂与传统的间歇釜式水溶液法所合成的同类产品相比，性能基本一致。
Solvent-free low-temperature ball-milling preparation method of solid polycarboxylic slump retaining agent
The invention relates to a solvent-free low-temperature ball-milling preparation method of a solid polycarboxylic slump retaining agent, which comprises the following steps: adding molten ethylene glycol vinyl polyoxyethylene ether, unsaturated carboxylic acid, acrylate, unsaturated amide and a chain transfer agent into a ball mill, closing a cover, opening an initiator feed valve, and adding halfof an initiator; opening a jacket chilled water valve of the ball mill while starting the ball mill for ball milling, and controlling the temperature to be 60+/-2 DEG C; adding the rest half of the initiator when ball milling is carried out for half of time, controlling the ball milling time to be 5-15 min, and after ball milling is finished, conveying a finished product to a cryogenic crusher through a discharging valve to crush and discharge the finished product. A solvent-free low-temperature ball milling method is adopted for bulk synthesis, the solid polycarboxylic acid slump retaining agent with the solid content reaching 98% or above can be prepared, and the prepared solid polycarboxylic acid slump retaining agent is basically consistent with similar products synthesized through atraditional intermittent kettle type aqueous solution method in performance.
本发明涉及一种固体聚羧酸系保坍剂的无溶剂低温球磨制备方法，包括以下步骤：将熔融态乙二醇乙烯基聚氧乙烯醚、不饱和羧酸、丙烯酸酯、不饱和酰胺和链转移剂加入球磨机并合盖，开启引发剂进料阀，加入一半的引发剂；然后在开启球磨机进行球磨的同时，开启球磨机夹套冷冻水阀门，控制温度为60±2℃；剩余一半引发剂在球磨进行一半时间时加入，球磨时间为5～15min，球磨结束后成品经放料阀到深冷粉碎机进行粉碎出料。本发明采用无溶剂低温球磨法进行本体合成，能制备固含量达到98％以上的固体聚羧酸系保坍剂，所制备的固体聚羧酸系保坍剂与传统的间歇釜式水溶液法所合成的同类产品相比，性能基本一致。
Solvent-free low-temperature ball-milling preparation method of solid polycarboxylic slump retaining agent
一种固体聚羧酸系保坍剂的无溶剂低温球磨制备方法
CHEN GUOXIN (author) / DU ZHIQIN (author) / WEN JINBAO (author) / TANG XIUSHENG (author) / ZHU YERAN (author) / LU JIAN (author)
2020-12-04
Patent
Electronic Resource
Chinese
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