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Modified fatty acid, polycarboxylate superplasticizer and preparation method of polycarboxylate superplasticizer
The invention discloses a modified fatty acid, a polycarboxylate superplasticizer and a preparation method of the polycarboxylate superplasticizer. The modified fatty acid is prepared by the following steps: (1) taking a certain amount of formic acid and hydrogen peroxide (with a concentration of 30%), then adding a certain amount of concentrated sulfuric acid, and uniformly mixing at 35 DEG C for later use; (2) weighing a certain amount of unsaturated fatty acid, adding the unsaturated fatty acid into a reaction container, heating in a water bath, raising the temperature to 60 DEG C, stirring at a constant speed, dropwise adding the reagent prepared in the step (1) into the reaction container within 2 hours, reacting for 1 hour under a constant-temperature condition, and after the reaction is finished, obtaining an intermediate product; and (3) adding a certain amount of FeCl3 and methacrylic acid into a container provided with a reflux cooler, an electric stirrer and a dropping funnel, dropwise adding the intermediate product obtained in the step (2) into the container, and reacting for 9 hours to obtain the modified fatty acid. By adjusting the use amount of the modified fatty acid in the polycarboxylate superplasticizer, the air-entraining property of the polycarboxylate superplasticizer can be changed.
本公开揭示了一种改性脂肪酸、聚羧酸减水剂及该聚羧酸减水剂的制备方法，该改性脂肪酸通过如下方法制备：(1)取一定量的甲酸与双氧水(30％浓度)，再加入一定量的浓硫酸，在35℃下混合均匀后，备用；(2)称取一定量的不饱和脂肪酸加入到反应容器中，水浴加热后升温至60℃后，匀速搅拌，并向其中滴加步骤(1)中制备好试剂，2h内滴加完毕，然后在恒温条件下反应1h；反应结束后，得到中间产物；(3)在装有回流冷却器、电动搅拌器、滴液漏斗的容器中，加入一定量的FeCl3与甲基丙烯酸，然后将步骤(2)所得的中间产物滴加到上述容器中反应9h得到所述改性脂肪酸。通过调节上述改性脂肪酸在聚羧酸减水剂的用量，可改变聚羧酸减水剂的引气性。
Modified fatty acid, polycarboxylate superplasticizer and preparation method of polycarboxylate superplasticizer
The invention discloses a modified fatty acid, a polycarboxylate superplasticizer and a preparation method of the polycarboxylate superplasticizer. The modified fatty acid is prepared by the following steps: (1) taking a certain amount of formic acid and hydrogen peroxide (with a concentration of 30%), then adding a certain amount of concentrated sulfuric acid, and uniformly mixing at 35 DEG C for later use; (2) weighing a certain amount of unsaturated fatty acid, adding the unsaturated fatty acid into a reaction container, heating in a water bath, raising the temperature to 60 DEG C, stirring at a constant speed, dropwise adding the reagent prepared in the step (1) into the reaction container within 2 hours, reacting for 1 hour under a constant-temperature condition, and after the reaction is finished, obtaining an intermediate product; and (3) adding a certain amount of FeCl3 and methacrylic acid into a container provided with a reflux cooler, an electric stirrer and a dropping funnel, dropwise adding the intermediate product obtained in the step (2) into the container, and reacting for 9 hours to obtain the modified fatty acid. By adjusting the use amount of the modified fatty acid in the polycarboxylate superplasticizer, the air-entraining property of the polycarboxylate superplasticizer can be changed.
本公开揭示了一种改性脂肪酸、聚羧酸减水剂及该聚羧酸减水剂的制备方法，该改性脂肪酸通过如下方法制备：(1)取一定量的甲酸与双氧水(30％浓度)，再加入一定量的浓硫酸，在35℃下混合均匀后，备用；(2)称取一定量的不饱和脂肪酸加入到反应容器中，水浴加热后升温至60℃后，匀速搅拌，并向其中滴加步骤(1)中制备好试剂，2h内滴加完毕，然后在恒温条件下反应1h；反应结束后，得到中间产物；(3)在装有回流冷却器、电动搅拌器、滴液漏斗的容器中，加入一定量的FeCl3与甲基丙烯酸，然后将步骤(2)所得的中间产物滴加到上述容器中反应9h得到所述改性脂肪酸。通过调节上述改性脂肪酸在聚羧酸减水剂的用量，可改变聚羧酸减水剂的引气性。
Modified fatty acid, polycarboxylate superplasticizer and preparation method of polycarboxylate superplasticizer
改性脂肪酸、聚羧酸减水剂及该聚羧酸减水剂的制备方法
ZHANG YEMING (author) / SUN LILI (author) / ZHANG LUYAO (author) / WANG XIAOYING (author) / TIAN JING (author) / LUO ZILONG (author) / GAO FENG (author) / CHEN FENGQI (author) / XIAO JIANQI (author) / WANG FUGANG (author)
2021-08-13
Patent
Electronic Resource
Chinese
IPC:
C07C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
,
Acyclische oder carbocyclische Verbindungen
/
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
| European Patent Office | 2023
| European Patent Office | 2022