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High-hydrolysis-resistance polyurethane sole material and double components thereof

A shoe sole material, hydrolysis-resistant technology, applied in the field of polyurethane materials, can solve the problems of limited application range, poor hydrolysis resistance, shortened service life, etc., and achieve the effect of improving wearing comfort, improving hydrolysis resistance and prolonging service life

Active Publication Date: 2013-09-11
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest defect of polyester polyurethane is its poor hydrolysis resistance. When used in a humid environment, it is easy to degrade and shorten the service life, resulting in waste of materials and huge economic losses.
[0003] At present, the most common way to improve the hydrolysis resistance of polyester polyurethane sole materials is to add a hydrolysis resistance agent, but the price of the hydrolysis resistance agent is high and it will migrate to the surface layer, which limits its application range

Method used

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  • High-hydrolysis-resistance polyurethane sole material and double components thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The first step, the preparation of polyester polyol

[0022] The preparation process of polydimer acid-3-methyl-1,5-pentanediol ester polyol with a molecular weight of about 2000: add 200 g of dimer acid and 3-methyl-1,5-pentanediol to the reaction kettle in sequence Diol 50g, turn on the stirring, start to heat up, when the temperature rises to 135~140°C, keep the temperature for 1 hour to stabilize the dehydration speed (through the rectification tower, the temperature at the top of the tower is kept <102°C), then continue to heat up, when the temperature rises to about 180°C, switch nitrogen from the lower part Introduce, and gradually increase the amount of nitrogen to strengthen dehydration. Raise the temperature to 225±5°C and keep the temperature constant. After 1 hour of constant temperature, add the catalyst and start vacuuming for transesterification. After 4 hours from the start of vacuuming, take a sample every 2 hours for central control analysis until the ...

Embodiment 2

[0034] The first step, the preparation of polyester polyol

[0035] The preparation process of polydimer acid-3-methyl-1,5-pentanediol ester polyol with a molecular weight of about 2000: add 250 g of dimer acid and 3-methyl-1,5-pentanediol to the reaction kettle in sequence Diol 64g, turn on the stirring, start to heat up, when the temperature rises to 135~140°C, keep the temperature for 1 hour to stabilize the dehydration speed (through the rectification tower, the temperature at the top of the tower is kept <102°C), then continue to heat up, when the temperature rises to about 180°C, switch the nitrogen from the lower part Introduce, and gradually increase the amount of nitrogen to strengthen dehydration. Raise the temperature to 225±5°C and keep the temperature constant. After 1 hour of constant temperature, add the catalyst and start vacuuming for transesterification. After 4 hours from the start of vacuuming, take a sample every 2 hours for central control analysis until ...

Embodiment 3

[0047] The first step, the preparation of polyester polyol

[0048] The preparation process of polydimer acid-3-methyl-1,5-pentanediol ester polyol with a molecular weight of about 2000: add 300 g of dimer acid and 3-methyl-1,5-pentanediol to the reaction kettle in sequence Diol 76g, turn on the stirring, start to heat up, keep the temperature at 140°C for 1 hour to stabilize the dehydration rate (through the rectification tower, the top temperature is kept < 102°C), then continue to heat up, when the temperature rises to about 180°C, switch nitrogen from the lower part , and gradually increase the amount of nitrogen to strengthen dehydration. When the temperature is raised to 230°C, the temperature is kept constant. After the constant temperature is maintained for 1 hour, the catalyst is added and the vacuum is started for transesterification. After 4 hours from the start of the vacuum, a sample is taken every 2 hours for central control analysis until the final acid value is...

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Abstract

The invention relates to a high-hydrolysis-resistance polyurethane sole material. The high-hydrolysis-resistance polyurethane sole material is composed of a polyalcohol component and a polyurethane prepolymer component jointly, wherein raw materials of the polyalcohol component comprise polyester polyalcohol, micromolecular polyalcohol taken as a chain extender, a catalyst, a foaming agent and a foam stabilizer, and the raw materials of the polyurethane prepolymer component comprise polyester polyalcohol and isocyanate. The invention also provides a polyalcohol component used for making the high-hydrolysis polyurethane sole material. The invention also provides a polyurethane prepolymer used for making the high-hydrolysis polyurethane sole material. The invention is used for well solving the problem that hydrolysis resistance of a polyester type polyurethane sole material is poor, hydrolysis resistance of a polyurethane product is improved, service life is prolonged, the obtained sole material is good in flexibility and rebound resilience, and wearing comfort is improved.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to a polyurethane material used for making shoe soles. Background technique [0002] Polyurethane shoe sole materials made from polyester polyols have currently occupied a quarter of the shoe sole market due to their excellent properties such as wide hardness range, wear resistance, good strength, and acid and alkali resistance. However, the biggest defect of polyester polyurethane is its poor hydrolysis resistance. When used in a humid environment, it is easy to degrade and shorten its service life, resulting in waste of materials and huge economic losses. [0003] At present, the most common way to improve the hydrolysis resistance of polyester polyurethane shoe sole materials is to add a hydrolysis resistance agent, but because the hydrolysis resistance agent is expensive and will migrate to the surface layer, its application range is limited. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08J9/10C08J9/12A43B13/04
Inventor 江平吕华波王征宇郑建伟
Owner XUCHUAN CHEM SUZHOU