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Polyester ether polyol preparation method

A technology of polyether ester polyol and polyester polyol, which is applied in the field of preparation of polyether ester polyol, can solve the problems of poor mechanical properties of polyurethane materials, complex catalyst post-treatment, catalyst residue, etc., and achieve simple and controllable adjustment, Easy-to-achieve, low-impact effects

Inactive Publication Date: 2017-06-13
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One aspect of the object of the present invention is to solve the problem that the poor compatibility of polyester polyol and polyether polyol leads to the poor mechanical properties of polyurethane materials based on it; on the other hand, it provides a simple and efficient technical idea to solve the problem of ring-opening reaction method Catalyst carryover and catalyst post-treatment complex issues

Method used

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  • Polyester ether polyol preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 5400g of polytetrahydrofuran glycol (PTMG-600) with a molecular weight of 600g / mol to the reaction kettle, heat up under nitrogen protection and start stirring, the temperature rises to 100°C and depressurizes for 1h, and the moisture in the polyether polyol is removed, and then Return to normal pressure and add 600g of polybutylene adipate diol with a molecular weight of 600g / mol, add catalyst tetraisopropyl titanate 0.12g, continue to heat up to 150°C, and vacuumize to -0.095 Mpa, transesterification reaction under reduced pressure for 2 hours; after the transesterification reaction, return to normal pressure and lower the temperature to 70°C, add 0.10g of dibutyl phosphate, and stir for 1 hour to obtain a polyether ester polyol product with no active catalyst residue, molecular weight It is 1500g / mol.

Embodiment 2

[0027] Add 600g of polyoxypropylene glycol (PPG-3000) with a molecular weight of 3000g / mol to the reaction kettle, raise the temperature under the protection of nitrogen and start stirring, the temperature rises to 100°C and the pressure is reduced for 1h, and the moisture in the polyether polyol is removed. Then return to normal pressure and add 5400g of polyethylene adipate butanediol with a molecular weight of 3000g / mol, add 0.05g of tetraisopropyl titanate as a catalyst, continue to heat up to 120°C, react under normal pressure for 1 hour and pump Vacuum to -0.09Mpa, transesterification reaction under reduced pressure for 10h; after the transesterification reaction, return to normal pressure and lower the temperature to 70°C, add 0.01g of dibutyl phosphate, stir for 1h, and obtain the polyether ester multi-component polyether ester with no active catalyst residue. Alcohol product, molecular weight is 1000g / mol.

Embodiment 3

[0029] Add 4000g of tetrahydrofuran with a molecular weight of 1000g / mol and propylene oxide copolymerized glycol into the reaction kettle, raise the temperature under the protection of nitrogen and start stirring, raise the temperature to 100°C and reduce the pressure for 1h, remove the moisture in the polyether polyol, and then restore Add 5400g of polybutylene succinate diol with a molecular weight of 1500g / mol under normal pressure, add 0.22g of tetraisopropyl titanate as a catalyst, continue to heat up to 200°C, and vacuumize to -0.096Mpa after reacting under normal pressure for 1 hour , transesterification reaction under reduced pressure for 4 hours; after the transesterification reaction, return to normal pressure and cool down to 70°C, add 0.06g of dibutyl phosphate, and stir for 1 hour to obtain a polyether ester polyol product with no active catalyst residue, the molecular weight is 2000g / mol.

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Abstract

The invention relates to a polyester ether polyol preparation method. The preparation method is mainly characterized in that polyester polyol and polyether glycol are subjected to ester exchange reaction in the presence of a catalyst, thereby preparing polyol having both polyester units and polyether units in a molecular chain. According to the method provided by the invention, the polyester ether polyol is prepared through an ester exchange method, so that the problem of poor compatibility of polyester polyol and polyether glycol is solved; and compared with a method for preparing polyester ether polyol through ring-opening polymerization, the method provided by the invention is simple to operate and high in efficiency and has no ring-opening catalyst residue, and the ester group and ether group contents can be regulated according to actual demands. Thus, the method provided by the invention can be widely used in the field of polyurethane synthesis.

Description

technical field [0001] The invention relates to a preparation method of polyether ester polyol, which belongs to the technical field of organic synthesis. Background technique [0002] In the field of polyurethane synthesis, polyol is an important raw material component. Polyether polyol and polyester polyol each have unique advantages, but there are also obvious differences. The hydrolysis resistance and low temperature resistance of polyester polyol Insufficient and polyether polyols have problems of poor heat resistance and oil resistance, and a single polyester polyol or polyether polyol can no longer meet the needs of high-performance polyurethane materials to a certain extent. [0003] If polyester polyols and polyether polyols can be combined, and each has its own strengths, polyether ester polyols can be prepared, which not only has the properties of polyether polyols such as hydrolysis resistance and low temperature flexibility, but also has the properties of polyes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G18/64
CPCC08G18/64C08G81/00
Inventor 刘德富宋红玮陈洋张生赵玮
Owner MIRACLL CHEM
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