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Preparation method of high-activity polyether polyol

A high-activity polyether and polyol technology, which is applied in the field of preparation of high-activity polyether polyols, can solve the problems of many side reactions and low activity, and achieve the effect of simple method, high polymerization activity and few side reactions

Active Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the low activity and many side reactions when using acidic catalysts to prepare high-activity polyether polyols in the prior art. A method for preparing high-activity polyether polyols, using a DMC catalyst and an acid catalyst to prepare high-activity polyether polyols in one pot, the obtained polymer does not need to remove the catalyst, and has the advantages of high catalytic activity and few by-products

Method used

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  • Preparation method of high-activity polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 400 g of difunctional polyether polyol GEP-204 with a molecular weight of 400 and 0.06 g of a bimetallic catalyst in a 3L autoclave equipped with a pressure and temperature gauge, a stirring device and a raw material feed port. After nitrogen replacement, the temperature was raised to 130° C., and 800 g of propylene oxide was continuously added over 1 hour. After the feeding of propylene oxide was completed, the mixture was aged for 1 hour, and the low-boiling fraction in the system was extracted with a vacuum pump, then the temperature was lowered to 60° C., and 0.06 g of tris(pentafluorophenyl)boron was added. After 1 hour, 950 g of propylene oxide was added continuously, aged for 1 hour, the low boiling point fraction in the system was extracted with a vacuum pump, 100 g of water was added, stirred for 5 hours, water was removed, and 1990 g of polymer was obtained from discharge. The polymer has a hydroxyl value of 56.3 mgKOH / g, a molecular weight distribution of...

Embodiment 2

[0047] Add 400 g of difunctional polyether polyol GEP-204 with a molecular weight of 400 and 0.06 g of a bimetallic catalyst in a 3L autoclave equipped with a pressure and temperature gauge, a stirring device and a raw material feed port. After nitrogen replacement, the temperature was raised to 130° C., and 1200 g of propylene oxide was continuously added over 1 hour. After the feeding of propylene oxide was completed, the mixture was aged for 1 hour, and the low-boiling fraction in the system was extracted with a vacuum pump, then the temperature was lowered to 60° C., and 0.06 g of tris(pentafluorophenyl)boron was added. After 1 hour, 480 g of propylene oxide was added continuously, and matured for 1 hour. The low boiling point fraction in the system was extracted with a vacuum pump, 100 g of water was added, stirred for 5 hours, water was removed, and 1990 g of polymer was discharged. The polymer has a hydroxyl value of 56.3 mgKOH / g, a molecular weight distribution of 1.07...

Embodiment 3

[0049] Add 200 g of difunctional polyether polyol GEP-204 with a molecular weight of 400 and 0.06 g of a bimetallic catalyst in a 3 L autoclave equipped with a pressure and temperature gauge, a stirring device and a raw material feed port. After nitrogen replacement, the temperature was raised to 130° C., and 1400 g of propylene oxide was continuously added over 1 hour. After the feeding of propylene oxide was completed, the mixture was aged for 1 hour, and the low-boiling fraction in the system was extracted with a vacuum pump, then the temperature was lowered to 60° C., and 0.06 g of tris(pentafluorophenyl)boron was added. After 1 hour, 500 g of propylene oxide was added continuously, aged for 1 hour, the low boiling point fraction in the system was extracted with a vacuum pump, 100 g of water was added, stirred for 5 hours, water was removed, and 1993 g of polymer was obtained from discharge. The hydroxyl value of the polymer is 28.4 mgKOH / g, the molecular weight distributi...

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Abstract

The invention relates to a preparation method of high-activity polyether polyol, mainly solves the problems of lower activity and many side reactions in the preparation of high-activity polyether polyol by using an acidic catalyst in the prior art. The preparation method of the high-activity polyether polyol is adopted and comprises the step of initiating polymerization of an epoxy compound in thepresence of a catalyst to obtain the high-activity polyether polyol, wherein the catalyst comprises a double-metal or multi-metal catalyst and an acid catalyst, the problem is well solved, and the method can be used for industrial production of high-activity polyether polyol.

Description

technical field [0001] The invention relates to a preparation method of high activity polyether polyol. Background technique [0002] The domestic method for preparing high-activity polyether polyols is to end-cap with ethylene oxide after propylene oxide polymerization. The polymerization amount of ethylene oxide is 10-15%, which reduces the hydrolysis resistance and damp heat aging performance of the polyether polyol and the polyurethane material produced therefrom. [0003] Bimetallic catalysts usually cannot be directly used in the synthesis of highly active polyether polyols. Because it will allow ethylene oxide to self-polymerize, forming a large amount of ethylene oxide self-polymer in the product. The industrial method is that after the catalytic polymerization of the bimetallic catalyst is completed, basic substances such as KOH and KMeO are added to deactivate the bimetallic catalyst, and then ethylene oxide is introduced for capping. This requires another react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
CPCC08G65/2609C08G65/269
Inventor 宰少波金晖张志华
Owner CHINA PETROLEUM & CHEM CORP
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