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Polymerization method of polytetrahydrofuran single alcohol and diol mixture

A technology of polytetrahydrofuran monoalcohol and polymerization method, which is applied in the direction of chemical recovery, etc., can solve the problems of long process, poor stability and adjustability, etc., and achieve the effect of short process, good stability and adjustability

Active Publication Date: 2013-07-24
杭州三隆新材料有限公司
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Problems solved by technology

[0015] The present invention provides a polymerization method of polytetrahydrofuran monoalcohol and diol mixture, which mainly solves the problems in the prior art that the polymerization process of polytetrahydrofuran monoalcohol and diol mixture is relatively long, the stability of control and the possibility of Technical problems such as poor tonality

Method used

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  • Polymerization method of polytetrahydrofuran single alcohol and diol mixture
  • Polymerization method of polytetrahydrofuran single alcohol and diol mixture
  • Polymerization method of polytetrahydrofuran single alcohol and diol mixture

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Embodiment

[0048] Embodiment: a kind of polymerization method of polytetrahydrofuran monoalcohol and diol mixture of this example, as figure 1As shown, its methods include:

[0049] a. Prepare a 2L three-necked round-bottomed flask, add heteropolyacid 350g (in this example, the crystal water content of heteropolyacid is 9.5) that meets the requirements of the present invention, and add tetrahydrofuran solution 1000ml that meets the requirements of the present invention ( The water content of tetrahydrofuran in this example was less than 0.01%). Place the above-mentioned round-bottomed flask containing the heteropolyacid catalyst and tetrahydrofuran solution in a water bath at 65° C., one of the ports of the round-bottomed flask is connected to a condenser, and the middle port is connected to a stirrer. Another excuse to plug with a suitable stopper. Then turn on the stirrer and adjust the rotation speed to 350rpm, stop stirring after 2 hours and let it stand for 30min. The heteropoly...

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Abstract

The invention relates to a polytetrahydrofuran preparation and purification method using alcamines substances or single alcohol substance and water as a end-capping reagent, especially relates to a polymerization method of polytetrahydrofuran single alcohol and diol mixture. The invention employs the problem that the polytetrahydrofuran diol prepared by the fluosulfonic acid method, the acetic anhydride-perchloric acid method and the concentrated sulfuric acid method has wide distribution and high viscosity, and the product should be melted by higher temperature for usage, and if the heteropoly acid method is out of control, the gel will be appeared. The invention provides a new method which employs a certain amount of hydramine or single alcohol as the end-capping reagent to prepare polytetrahydrofuran, and uniform mixing of the polytetrahydrofuran and the polytetrahydrofuran diol prepared by the end-capping reagent water can be used as a novel raw material widely applied in the fields of spandex fiber, polyurethane elastomer, ester and ether copolymerization elastomer, petrochemical industry, spaceflight, etc.

Description

technical field [0001] The invention relates to a preparation and purification method of polytetrahydrofuran using alcohol amine substances or monoalcohol substances and water as end-capping agents, in particular to a polymerization method of polytetrahydrofuran monoalcohol and diol mixture. Background technique [0002] Polytetrahydrofuran and its copolymers are widely used raw materials, which can be used as polyurethane elastic fibers, TPU, aviation materials and other aspects. [0003] At present, the preparation methods of polytetrahydrofuran in industry mainly contain the following types: [0004] 1. Fluorosulfonic acid method. Its main reflection equation is: , This method has high requirements on equipment, requires special materials and consumes a large amount of fluorosulfonic acid, which has a great impact on the environment. [0005] [0006] 2. Acetic anhydride-perchloric acid method. Its main reaction equation is: [0007] [0008] This method uses ...

Claims

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Application Information

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IPC IPC(8): C08G65/28
CPCY02P20/584
Inventor 易杰施可彬
Owner 杭州三隆新材料有限公司
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