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Hydrolysis-resistant polyester polyol and preparation process thereof

A polyester polyol and a preparation process technology, which are applied in the fields of ester polyol and its preparation, hydrolysis-resistant polyester polyol and its preparation, can solve problems such as poor hydrolysis resistance, achieve high stability and reduce alcohol consumption. Loss, energy saving effect

Inactive Publication Date: 2012-11-14
烟台万华超纤股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing polyester polyols have good strength, wear resistance and high temperature resistance, but poor hydrolysis resistance.

Method used

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  • Hydrolysis-resistant polyester polyol and preparation process thereof
  • Hydrolysis-resistant polyester polyol and preparation process thereof
  • Hydrolysis-resistant polyester polyol and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The hydrolysis-resistant polyester polyol of this embodiment has the structural formula:

[0027]

[0028] Where R is (CH 2 ) 4

[0029] n represents the degree of polymerization, where the value range of n is 1-50;

[0030] A hydrolysis-resistant polyester polyol and its preparation process, including the following steps:

[0031] 1. Add diols 1,4 butanediol, methyl propylene glycol, and adipic acid into the reactor, and then add the catalyst tetraisopropyl peptide ester, the mass ratio of the diols, adipic acid, and the catalyst It is 0.65:1:0.00004, turn on the stirrer, and pour nitrogen into it, stir evenly;

[0032] 2. Raise the temperature of the reactor. When the temperature of the materials in the reactor rises to 130°C, the esterification reaction starts, that is, glycols will generate low molecular weight polyester through the esterification reaction. The condensation water vapor produced by the reaction and its The entrained glycols are rectified through the rectific...

Embodiment 2

[0040] The hydrolysis-resistant polyester polyol of this embodiment has the structural formula:

[0041]

[0042] Where R is (CH 2 ) 4

[0043] n represents the degree of polymerization, where the value range of n is 1-100;

[0044] The preparation process of the hydrolysis-resistant polyester polyol of this embodiment includes the following steps:

[0045] 1. Add glycols, ethylene glycol, methyl propylene glycol, and adipic acid to the reactor, and then add the catalyst tetraisopropyl peptide ester. The mass ratio of glycols, adipic acid, and catalyst is 0.70: 1:0.000045;

[0046] 2. Heat up the reactor. When the temperature of the materials in the reactor rises to 132°C, the esterification reaction starts, that is, glycols and adipic acid undergo esterification to generate low-molecular-weight polyester, and the condensation water produced by the reaction at this time The steam and its entrained glycols are rectified through the rectification tower. The glycols are recovered in the ...

Embodiment 3

[0054] The hydrolysis-resistant polyester polyol of this embodiment has the structural formula:

[0055]

[0056] Where R is (CH 2 ) 4

[0057] n represents the degree of polymerization, where the value range of n is 1-150;

[0058] The preparation process of the hydrolysis-resistant polyester polyol of this embodiment includes the following steps:

[0059] 1. Add the glycols methyl propylene glycol, 1,4 butanediol, and adipic acid into the reactor, and then add the catalyst tetraisopropyl peptide ester, the mass ratio of the three is 0.75:1:0.00005;

[0060] 2. Heat up the reactor. When the temperature of the materials in the reactor rises to 130°C, the esterification reaction begins, that is, glycols and adipic acid undergo esterification to generate low-molecular polyester, and the condensation water produced by the reaction at this time Steam and its entrained glycols are rectified through a rectification tower. The glycols are recovered in the tower and directly enter the reactor....

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Abstract

The invention relates to a hydrolysis-resistant polyester polyol and a preparation process of the polyester polyol, which belongs to the technical fields of polyester polyol and polyester polyol preparation process. The preparation process comprises the following steps of: 1. feeding; 2.esterifying; 3. transesterifying; and 4. adjusting and filtering. The prepared hydrolysis-resistant polyester polyol by using the preparation process provided by the invention has a low melting point, can maintain liquid state at a low temperature and has good hydrolysis resistance.

Description

Technical field [0001] The invention relates to a hydrolysis-resistant polyester polyol and a preparation process thereof, and belongs to the technical field of ester polyols and preparation processes thereof. Background technique [0002] At present, the existing polyester polyols have good strength, wear resistance, and high temperature resistance, but have poor hydrolysis resistance. Summary of the invention [0003] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art, and provide a hydrolysis-resistant polyester polyol with a low melting point, which can maintain a liquid state at low temperatures, and has excellent hydrolysis resistance and a preparation process thereof. [0004] Hydrolysis resistant polyester polyol, the structural formula is: [0005] [0006] Where R is (CH 2 ) 4 [0007] n represents the degree of polymerization, n> 1; [0008] The preparation process of hydrolysis resistant polyester polyol is special in that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/90C08G63/78
Inventor 李天池聂玉红赵春湖孙玉月李革赵妙
Owner 烟台万华超纤股份有限公司
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