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Process for production of alkyllene oxide polymers

A technology of alkylene oxide and production method, which is applied in the field of production of alkylene oxide polymers, and can solve the problems of low reproducibility of polymerization degree, agglomeration, and inability to obtain yield of polymers.

Inactive Publication Date: 2004-08-25
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methods recorded in these documents have the problems that the polymerization rate is low and cannot obtain good yields.
In addition, the degree of polymerization of the resulting polymers is less reproducible
In addition, the polymerization product may agglomerate, making it difficult to produce alkylene oxide polymers industrially stably
[0012] On the other hand, according to the production method disclosed in the above-mentioned JP-A-62-232433, although the polymerization degree reproducibility of the obtained polymer is good, there is a problem that not only the preparation operation of the catalyst is very complicated, but also the polymerization rate is slow. relatively low problem

Method used

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  • Process for production of alkyllene oxide polymers
  • Process for production of alkyllene oxide polymers
  • Process for production of alkyllene oxide polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (Catalyst preparation)

[0027] First, place the 200cm 3 The four-necked flask was replaced with nitrogen. The flask was connected to a stirrer, cooling tube and dropping funnel.

[0028] Next, in this flask, 18.3 g of 2-methylpentane (manufactured by Wako Pure Chemical Industries, Ltd.) as a solvent and 47.7 g of high-boiling aliphatic hydrocarbon (trade name: No. 0 solvent, Nippon Oil Corporation, Ltd.) were charged. ) and 7.4 g (0.06 mol) of diethylzinc (manufactured by Nippon Special Chemical Industry Co., Ltd.) were prepared as a mixed solution.

[0029] Next, while vigorously stirring the above mixed solution at 10° C., 4.3 g of 1,4-butanediol was dropped into the solution in small portions over 1 hour. After completion of the dropwise addition, reaction was performed at 30° C. for 1 hour while stirring, and then reaction was further performed at 50° C. for 1 hour while stirring.

[0030] Thereafter, 3.6 g of ethanol (manufactured by Nippon Ethanol Marketing C...

Embodiment 2

[0036] 1,000cm after nitrogen replacement 3 345g of 3-methylpentane (manufactured by Wako Pure Chemical Industry Co., Ltd.) and 0.47g of the catalyst obtained in Example 1 (the content of zinc is 0.5mmol) were charged as a solvent, and the catalyst was stirred to Disperse evenly in the solvent.

[0037] Next, 84 g (1.91 mol) of ethylene oxide (manufactured by Nippon Shokubai Co., Ltd.) was added, the container was sealed with a stopper, and polymerization reaction was performed for 2 hours while stirring in a constant temperature water bath at 40°C.

[0038] After the polymerization reaction was completed, the white product was isolated from the solvent by filtration, and then dried under reduced pressure at 40° C. for 5 hours to obtain 77 g of polyethylene oxide. In this example, the yield of polyethylene oxide relative to ethylene oxide was 91.7%.

Embodiment 3

[0040] 1,000cm after nitrogen replacement 3 In a pressure-resistant container, add 345g of 2-methylpentane (manufactured by Wako Pure Chemical Industry Co., Ltd.) as a solvent and 0.94g of the catalyst obtained in Example 1 (the content of zinc is 1.0mmol), and the catalyst is made uniform by stirring. dispersed in the solvent.

[0041] Next, 75 g (1.70 mol) of ethylene oxide (manufactured by Nippon Shokubai Co., Ltd.) and 11 g (0.19 mol) of propylene oxide (manufactured by Nippon OXIRANE Co., Ltd.) were added and the container was sealed with a stopper, and then, at a constant temperature of 40° C. The polymerization reaction was performed for 2 hours while stirring in a water bath.

[0042] After the polymerization reaction, the white product was isolated from the solvent by filtration, and dried under reduced pressure at 40° C. for 5 hours to obtain 77 g of an ethylene oxide / propylene oxide copolymer. In this example, the yield of the ethylene oxide / propylene oxide copoly...

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Abstract

According to a process for production of alkylene oxide polymers offered by the present invention, an alkylene oxide is subjected to a polymerization reaction under presence of a catalyst in a solvent containing an aliphatic hydrocarbon having from five to seven carbon atoms and a branched structure. The aliphatic hydrocarbon is provided preferably by 2-methyl pentane, 3-methyl pentane, 2,3-dimethyl pentane, 2,4-dimethyl pentane, etc. The alkylene oxide is provided preferably by ethylene oxides and / or propylene oxides.

Description

technical field [0001] The present invention relates to a kind of production method of alkylene oxide polymer. Background technique [0002] Generally speaking, the polymerization product of alkylene oxide, that is, alkylene oxide polymer, is a water-soluble polymer having excellent aggregation, dispersion, and thickening effects. Because of these functions, alkylene oxide polymers are widely used in pulp dispersants, resin modifiers, binders, coagulants, detergents, food, personal care products, sanitary materials, cosmetics, medical supplies and quasi-drugs and other fields. [0003] The alkylene oxide polymer is a compound having a cyclic ether structure as shown in the following formula I in the molecular structure. [0004] [0005] As well known, representative alkylene oxides include ethylene oxide represented by the following formula II and propylene oxide represented by the following formula III. [0006] [0007] Alkylene oxide is polymerized by a variety ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/10C08G65/26
CPCC08G65/2648C08G65/266C08G65/2696C08G65/2654C08G65/2642
Inventor 滨本茂生藤本信贵加藤真司三浦一幸
Owner SUMITOMO SEIKA CHEM CO LTD
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