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Vinyl polyether and preparation method and application thereof

A technology of vinyl polyether and vinyl ether, applied in the field of polyether, can solve the problems of poor quality stability of water reducer products, few types of polyether monomers, cumbersome process steps, etc., and achieve superior quality, narrow molecular weight distribution, Good effect of process controllability

Inactive Publication Date: 2011-08-10
LIAONING OXIRANCHEM INC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing synthesis technology of polycarboxylate water reducer, the polyether raw material used to synthesize polycarboxylate water reducer is mainly (meth)acrylate of enol ether, polyethylene glycol or methylpolyethylene glycol etc., the types of polyether monomers are relatively small, the structure is relatively simple, and the process steps of using polyethylene glycol ester polyether monomers to synthesize water reducers are cumbersome, the synthesis is not easy to control, and the quality stability of water reducer products is poor.

Method used

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  • Vinyl polyether and preparation method and application thereof
  • Vinyl polyether and preparation method and application thereof
  • Vinyl polyether and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0045] The sodium methylate of 40g ethylene glycol monovinyl ether and 4.9g is joined in the autoclave, with N 2 After the replacement is qualified, start to heat up the reactor and start the mixer at the same time. When the temperature of the kettle rose to 92°C, start to add 2g of ethylene oxide to the reactor. After the temperature rose and the pressure dropped, 49g of oxirane was continuously and stably added to the reactor. During the feeding, the reaction temperature was controlled to be 120-130°C. After the feeding is completed, under constant temperature conditions, carry out the aging reaction for 20 minutes. When the pressure of the kettle no longer drops, start to cool down the materials in the reactor. After the temperature of the reactor is lowered to 70-90°C, phosphoric acid is added to carry out neutralization reaction until the pH of the polyether product is 6.4 to obtain a vinyl polyether product of the present invention, whose structure is shown in the follow...

Embodiment 2

[0048] The potassium hydroxide of 3g diethylene glycol monovinyl ether and 0.25g is joined in the autoclave, with N2 After the replacement is qualified, start to heat up the reactor and start the mixer at the same time. When the temperature of the kettle rises to 110°C, start to add 2g of ethylene oxide and 2g of propylene oxide to the reactor. After the temperature rises and the pressure drops, add 66g of ethylene oxide and 40g of oxyethane continuously and stably. Add propane to the reaction kettle, among them, propylene oxide needs to be added after the ethylene oxide polymerization reaction is completed. During each feeding period, the reaction temperature is controlled at 150-160 ° C. After each feeding is completed, the aging reaction is carried out under constant temperature conditions. After 30 minutes, when the pressure of the kettle no longer drops, start to cool down the materials in the reactor. The temperature of the reactor is lowered to 90°C and acetic acid is ad...

Embodiment 3

[0051] Add 5g of 4-hydroxybutyl vinyl ether and 0.41g of sodium hydroxide and potassium hydroxide into the autoclave, and use N 2 After the replacement is qualified, start to heat up the reactor and start the mixer at the same time. When the temperature of the kettle rises to 110°C, start to add 2g of a mixture of ethylene oxide and butylene oxide to the reaction kettle. After the temperature rises and the pressure drops, add 98g of ethylene oxide and butylene oxide continuously and stably. Add the mixture of alkanes to the reaction kettle, and control the reaction temperature at 130-140°C during the feeding period. After the feeding is completed, under constant temperature conditions, carry out the aging reaction for 40 minutes. When the pressure of the kettle no longer drops, start to cool down the reactor materials. After the temperature of the reactor is lowered to 85°C, dilute sulfuric acid is added to carry out neutralization reaction until the pH of the polyether produc...

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Abstract

The invention provides vinyl polyether. The structure of the vinyl polyether is expressed in the following formula (1), wherein R1 represents C1 to C8 alkylene; R2 represents hydrogen or C1 to C3 alkyl; a and b are integers in the range of 2 to 4 and are unequal; n is an integer in the range of 0 to 100; m is an integer in the range of 0 to 100; and the sum of n and m is more than or equal to 3 and is less than or equal to 100. A polyether monomer has good polymerization activity and molecular structure controllability. The invention also provides a preparation method of the vinyl polyether and application of the vinyl polyethe to the synthesis of high molecular polymers such as a concrete poly carboxylic acid water reducing agent, a water treatment agent, a macromolecule surfactant or various resins and the like.

Description

technical field [0001] The invention relates to a polyether, in particular to a vinyl polyether, its preparation method and its application in the synthesis of industrial polymers. Background technique [0002] At present, with the rapid development of the concrete industry, the use of concrete admixtures, especially high-efficiency water reducers, is the most effective, simple and economical way to reduce the amount of cement, increase the utilization rate of industrial waste residue, increase the strength level of concrete and improve the durability of concrete. Water reducer has become an essential component in the preparation of high-performance and high-durability concrete, and it is also the most important basic material for the concrete industry to achieve sustainable development strategies. [0003] However, traditional polycondensation water reducers such as lignin, naphthalene, and melamine have problems such as low water reducing rate and large slump loss, and the...

Claims

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Application Information

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IPC IPC(8): C08G65/28C07C43/178C07C41/03C08F283/06C04B24/26B01F17/42C04B103/30C09K23/42
Inventor 朱建民刘兆滨董振鹏仲崇纲周立明范雷孙桂娥
Owner LIAONING OXIRANCHEM INC
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