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Composite method of isopentenol polyoxyethylene ether

A technology of prenyl alcohol polyoxyethylene ether and prenyl alcohol, which is applied in the synthesis field of prenyl alcohol polyoxyethylene ether, can solve problems such as not being retrieved, achieve enhancement effect and maintain strong cement particle dispersibility The effect of high capacity and water reduction rate

Inactive Publication Date: 2010-12-29
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the search of the applicant, no relevant literature reports about the production of prenol polyoxyethylene ether have been retrieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] Wash the autoclave (2.5L) several times with distilled water until it is clean. Dry the reaction kettle, after cooling (temperature 31 ℃), add 586g isopentenol and 0.76g sodium methylate (powder) in the reaction kettle, use N 2 Replace the air in the kettle, raise the temperature to 70°C, and start to add 920g of ethylene oxide continuously under the vacuum condition in the reaction kettle, control the flow rate and finish adding in 4 hours, and the reaction temperature is 70-120°C. Heat preservation and aging until the pressure in the reactor no longer drops, about 1.5 hours. After the reaction is complete, lower the temperature to 80°C and vacuumize to remove low-boiling substances, then add glacial acetic acid to neutralize to pH 6.1, and then pack it.

[0012] The test data of this experimental product are: hydroxyl value 255.1, molecular weight 220, color 30, iodine value 98.1.

example 2

[0014] Wash the autoclave (2.5L) several times with distilled water until it is clean. Dry the reaction kettle, add 129g isopentenol and sodium methoxide (powder) 1.1g after cooling (temperature 28 ℃), use N 2 Replace the air in the kettle, raise the temperature to 70°C, and start to add 1400g of ethylene oxide continuously under the vacuum condition in the reactor, control the flow rate and finish adding in 16 hours, the reaction temperature is 80-150°C, keep warm and mature until the pressure in the reactor is no longer So far, about 1.5 hours. After the reaction is complete, lower the temperature to 80°C and vacuumize to remove low-boiling substances, then add glacial acetic acid to neutralize to pH 6.0, and then pack it.

[0015] The test data of this experimental product are: hydroxyl value 56.1, molecular weight 1000, color and luster 20, iodine value 25.0.

example 3

[0017] Wash the autoclave (2.5L) several times with distilled water until it is clean. Dry the reaction kettle, add 32g isopentenol and powdery sodium methylate solid 0.18g after cooling (temperature 30°C), use N 2 Replace the air in the kettle, raise the temperature to 70°C, and continue to add 118g of ethylene oxide under vacuum in the reactor, the reaction temperature is 80-155°C, control the flow rate for 7 hours, and keep warm until the pressure in the reactor is no longer So far, about 1.5 hours. , after cooling down to 80°C and vacuumizing to remove low boiling point substances. Then add 1.7g of powdered sodium methoxide solid to replace the N 2 After 2 times, heat up to 90-120°C for 60 minutes of vacuum dehydration, then continue to add 1350g of ethylene oxide, control the flow rate for 16 hours to complete the addition, the reaction temperature is 80-155°C, heat preservation and aging until the pressure in the reactor no longer drops , about 1.5 hours. Cool down t...

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Abstract

The invention discloses a preparation method of isopentenol polyoxyethylene ether. Isopentenol and ethylene oxide are served as raw materials; in the presence of catalyst, the raw materials react for 5-40 hours to obtain the isopentenol polyoxyethylene ether at the reaction temperature of 70-160 DEG C. The isopentenol polyoxyethylene ether has the molecular weight of 200-6000 and the iodine value of 3.9-123; the mass ratio of isopentenol to ethylene oxide in the raw materials is 1:0.0143-0.754; and the mass of the catalyst is 0.03-0.5% of total mass of the raw materials of isopentenol and ethylene oxide. The invention has simple and reasonable technology. Because the invention has the structural particularity of branched chain methyl, molecular space steric hindrance is increased, and the composite polycarboxylic acid high-efficiency water reducer has strong cement particle dispersibility holding capacity. Thus, the product has the advantages of low dosage, high water-reducing ratio, good strengthening effects, good durability and the like, does not erode reinforcing steel bars and protects environment.

Description

technical field [0001] The invention relates to a method for synthesizing prenol polyoxyethylene ether, which belongs to the technical field of organic polymerization. Background technique [0002] The cement water reducer currently used in my country mainly uses allyl alcohol polyoxyethylene ether or polyethylene glycol monomethyl ether as the original synthetic polycarboxylate cement water reducer. Its water-reducing effect is average, and it can only be used in commercial concrete with medium and low strength (below C80). In order to improve the quality of cement, especially some high-strength cement, the quality of cement superplasticizer should be improved. For this reason, isopentenol polyoxyethylene ether has begun to be used as a high-quality cement water reducer in the construction field. [0003] Prenyl alcohol polyoxyethylene ether is non-toxic, non-irritating, has good water solubility, and will not hydrolyze and deteriorate. And it has good compatibility with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C07C43/178C07C41/03C04B24/32C04B24/02C04B103/30
Inventor 王伟松王新荣金一丰王胜利马定连罗青
Owner ZHEJIANG HUANGMA TECH
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