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Preparation method of polyether polyol

A technology of polyether polyol and general formula is applied in the field of preparation of polyether polyol, which can solve the problems of complicated preparation of catalyst and achieve the effects of improved performance, less content and good technical effect.

Inactive Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is that the polyether polyol product contains metal elements in the prior art, and the preparation of the catalyst is complicated. A preparation method of polyether polyol is provided, which has the advantages of easy synthesis of catalyst and no metal at all. elements, and there is no residual odor in the product, and the advantages of simple preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Under nitrogen atmosphere, -20 o C. Slowly add phosphorus oxychloride dropwise into a dichloromethane solution containing tetramethylguanidine, heat and reflux for 6 hours, filter the precipitate, and evaporate the filtrate to dryness to obtain the compound shown in general formula (1). Catalyst, three (tetramethylguanidino) phosphorus oxide {[(Me 2 N) 2 C=N] 3 P=O} (Me means methyl, the same applies below).

[0038] 7.78 g (0.02 mol) of tris(tetramethylguanidine) as a phosphazene oxide compound represented by the general formula (1) was added to a 3 L autoclave equipped with a pressure and temperature measuring device, a stirring device and an epoxy compound feed port ) phosphorus oxide {[(Me 2 N) 2 C=N] 3 P=O} and 60 g (651 mmol) glycerol. After nitrogen replacement, the temperature was raised to 100 o c. Then, 925 g (15.8 mol) of propylene oxide was continuously added over 8 hours so that the reaction pressure did not exceed 0.35 MPa. After the propylene ox...

Embodiment 2

[0043] The same method in Example 1 was repeated, except that the amount of catalyst was changed to 3.89 g (0.01 mol), and the reaction time was changed to 20 hours. As a result, 960 g of an odorless transparent polymer were obtained. This polymer had a hydroxyl value of 115 and a number average molecular weight of 1470.

[0044]

Embodiment 3

[0046] Repeat the same method in Example 1, but add 60 g of polymer containing the catalyst component obtained in Example 1 to replace the phosphazene oxide and glycerin used in Example 1 in the reactor, and then add through 8 hours 180 g (3.10 mol) of propylene oxide and the reaction time was changed to 20 hours. As a result 235 g of a clear, odorless polyoxypropylene triol were obtained and had a hydroxyl number of 29.5. The number average molecular weight calculated from the hydroxyl value was 5700. The molecular weight distribution was 1.05.

[0047]

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PUM

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Abstract

The invention relates to a preparation method of polyether polyol, which is mainly used for solving the problems that in the prior art, a polyether polyol product contains metallic elements and a catalyst is complicated to prepare. The preparation method of polyether polyol comprises the following steps: with a phosphine oxide compound as a catalyst, an epoxy compound as a raw material and an activated hydrogen compound as an initiator, reacting the catalyst with the epoxy compound under the conditions that a reaction temperature is 10-180 DEG C, a reaction pressure is not higher than 3.0 MPa and a reaction time is 0.1-50 hours to generate polyether polyol. The technical scheme is adopted to well solving the problem, and the preparation method can be used in the production of polyether polyol.

Description

technical field [0001] The invention relates to a preparation method of polyether polyol, a method for synthesizing polyether polyol through epoxy compound. Background technique [0002] Polyether polyol is a bulk chemical raw material with a wide range of applications. The industrial synthesis of polyether polyols generally uses base catalysts and double metal catalysts (DMC). KOH is the most commonly used alkali catalyst. Its reaction conditions are relatively mild (temperature is 100-130 ° C, pressure is 0.2-0.5 MPa), the reaction is easy to control, and the cost of the catalyst is very low. Chain transfer reactions are prone to occur in the medium, resulting in a series of disadvantages such as low relative molecular weight, wide product distribution, and high degree of unsaturation, which affect product performance indicators and limit the application of the product. The polyether produced by bimetallic catalyst does not have the above-mentioned problems, and its adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G65/26C08G18/48
Inventor 宰少波涂建军宋虹霞
Owner CHINA PETROLEUM & CHEM CORP
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