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High-performance antifreeze agent and preparation method thereof

An antifreeze, high-performance technology, applied in the field of high-performance antifreeze and its preparation, can solve the problems of difficult control of esterification rate, inability to meet low temperature use, excessive relative molecular weight of antifreeze, etc., to achieve good antifreeze performance, good The effect of durability and strength

Active Publication Date: 2020-01-10
大同恒安混凝土外加剂有限公司
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Problems solved by technology

However, in the process of preparing macromonomers, due to difficult control of process conditions and other reasons, the esterification rate is difficult to control, resulting in difficulty in controlling the molecular weight of antifreeze. If the relative molecular weight of antifreeze is too large or too small, the antifreeze effect of concrete will be affected. Poor, unable to meet the requirements of low temperature use

Method used

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  • High-performance antifreeze agent and preparation method thereof
  • High-performance antifreeze agent and preparation method thereof
  • High-performance antifreeze agent and preparation method thereof

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preparation example Construction

[0041] The preparation method of the high-performance antifreeze in each of the above embodiments is as follows:

[0042] Esterification: take polyethylene glycol and 3,4,9,10-perylenetetracarboxylic anhydride, melt polyethylene glycol and 3,4,9,10-perylenetetracarboxylic anhydride and add them to the reaction kettle at the same time, stir evenly , filled with nitrogen, the nitrogen flow rate is S, at the same time add the initiator A, increase the temperature T of the reactor 1 , stir evenly t 1 , then add concentrated sulfuric acid, continue to raise the temperature T of the reactor 2 , stir evenly t 2 , after the reaction is completed, the esterified macromonomer is obtained;

[0043] Polymerization: Mix the prepared macromer, D-allylglycine, and molecular weight regulator uniformly to obtain mixture C; uniformly mix initiator B and deionized water to obtain mixture D; raise the temperature of the reactor to T 3 , while adding mixture C and mixture D dropwise, mixture C...

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Abstract

The invention relates to a high-performance antifreezing agent. The antifreezing agent is prepared from, by weight, 20-30 parts of polyethylene glycol, 15-19 parts of 3,4,9,10-perylenetetracarboxylic dianhydride, 2.5-5 parts of initiator A, 1-5 parts of concentrated sulfuric acid, 15-21 parts of D-allylglycine, 0.9-3 parts of molecular weight regulators, 5-9 parts of initiator B, 60-80 parts of deionized water and 1-3 parts of NaOH solid particles. The high-performance antifreezing agent has good antifreezing performance.

Description

technical field [0001] The invention relates to the field of concrete admixtures, more specifically, it relates to a high-performance antifreeze agent and a preparation method thereof. Background technique [0002] The construction of concrete at low temperature is very unfavorable, and it is a problem worthy of attention to ensure the progress and quality of concrete in the process of low temperature construction. At present, it is generally used to mix antifreeze agent in concrete. This method is simple in construction and has better antifreeze effect, so it has been widely used. [0003] At present, the synthesis process of antifreeze is mainly to prepare a macromonomer with polymerization activity through esterification reaction, and then mix a certain proportion of monomers together, and directly adopt solution polymerization to obtain a finished product. However, in the process of preparing macromonomers, due to difficult control of process conditions and other reason...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B24/42C08F283/06C08F226/02C08G65/331C04B103/60
CPCC04B24/32C04B40/0039C04B2103/601C04B2201/50C08F283/06C08G65/331C08F226/02C04B22/062C04B24/281C04B24/42C04B22/085C04B24/02
Inventor 赵家琦
Owner 大同恒安混凝土外加剂有限公司
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