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Highly-waterproof water-soluble polyurethane resin and preparation method thereof

A water-soluble polyurethane and water-resistant technology, applied in the field of water-soluble polyurethane resin, can solve problems such as reducing water resistance, and achieve the effects of low production risk, good water resistance and good wettability

Inactive Publication Date: 2016-01-13
安徽思敬齐环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of hydrophilic groups improves the hydrophilicity of polyurethane while reducing its water resistance.

Method used

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  • Highly-waterproof water-soluble polyurethane resin and preparation method thereof

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preparation example Construction

[0029] refer to figure 1 , a kind of high water resistance water-soluble polyurethane resin preparation method that the present invention proposes, comprises the following steps:

[0030] S1. Warm up and melt terephthalic anhydride polyester diol and polyadipate-1,4-cyclohexanedimethanol ester diol, keep warm, and then vacuum dehydrate to obtain material a;

[0031] S2. Add tetramethylxylylene diisocyanate to material a, heat up, keep warm, add 1,5-pentanediol, melamine-formaldehyde resin and N-methylpyrrolidone after cooling down, then add cobalt octanoate, and heat up , heat preservation, to obtain material b;

[0032] S3. After cooling down the temperature of material b, add dropwise a mixed solution containing N-propyldiethanolamine and bis(2-hydroxyethyl)aniline, heat up, and keep warm to obtain material c;

[0033] S4. Add propionic acid dropwise to the material c for neutralization, and vacuum distill to obtain a highly water-resistant water-soluble polyurethane resin...

Embodiment 1

[0036] A kind of high water resistance water-soluble polyurethane resin preparation method that the present invention proposes, comprises the following steps:

[0037] S1. Heat 30 parts of terephthalic anhydride polyester diol and 16 parts of polyadipate-1,4-cyclohexanedimethanol diol to 130°C in parts by weight, keep it warm for 4.5 hours, and then vacuum dehydrate to obtain material a;

[0038] S2. Add 25 parts of tetramethylxylylene diisocyanate to material a, raise the temperature to 100°C, keep it warm for 2 hours, add 4 parts of 1,5-pentanediol and 3 parts of melamine-formaldehyde resin after cooling down to 55°C and 25 parts of N-methylpyrrolidone, then add 0.2 parts of cobalt octoate, heat up to 87°C, and keep the temperature for 3.2 hours to obtain material b;

[0039] S3. After cooling material b to 40°C, add dropwise a mixed solution containing N-propyldiethanolamine and bis(2-hydroxyethyl)aniline, wherein the mixed solution consists of 3 parts of N-propyldiethanol...

Embodiment 2

[0042] A kind of high water resistance water-soluble polyurethane resin preparation method that the present invention proposes, comprises the following steps:

[0043] S1. Heat 33 parts of terephthalic anhydride polyester diol and 13 parts of polyadipate-1,4-cyclohexanedimethanol diol to 160°C in parts by weight, keep it warm for 3 hours, and then vacuum dehydrate to obtain the material a;

[0044] S2. Add 28 parts of tetramethylxylylene diisocyanate to material a, raise the temperature to 90°C, keep it warm for 3 hours, add 6 parts of 1,5-pentanediol and 2 parts of melamine-formaldehyde resin after cooling down to 45°C and 28 parts of N-methylpyrrolidone, then add 0.1 part of cobalt octoate, heat up to 90°C, and keep the temperature for 2.5 hours to obtain material b;

[0045] S3. After cooling material b to 45°C, add dropwise a mixed solution containing N-propyldiethanolamine and bis(2-hydroxyethyl)aniline, wherein the mixed solution consists of 2 parts of N-propyldiethanol...

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Abstract

The invention discloses a preparation method of highly-waterproof water-soluble polyurethane resin. The method comprises the following steps: heating terephthalic anhydride polyester diol and poly(1,4-cyclohexanedimethanol adipate) diol for melting, carrying out heat insulation, and carrying out vacuum dehydration to obtain a material a; adding tetramethyl phenyldimethylene diisocyanate to the material a, heating, carrying out heat insulation, cooling, adding 1,5-pentanediol, melamine-formaldehyde resin and N-methyl pyrrolidone, adding cobalt octoate, heating, and carrying out heat insulation to obtain a material b; cooling the material b, adding a N-propyldiethanolamine and bis(2-hydroxyethyl)aniline mixed solution in a dropwise manner, heating, and carrying out heat insulation to obtain a material c; and adding propionic acid to the material c to neutralize, and carrying out vacuum distillation to obtain the highly-waterproof water-soluble polyurethane resin. The invention also discloses the highly-waterproof water-soluble polyurethane resin. The highly-waterproof water-soluble polyurethane resin has excellent waterproof property and hardness, and the method is stable and is easy to control.

Description

technical field [0001] The invention relates to the technical field of water-soluble polyurethane resins, in particular to a water-soluble polyurethane resin with high water resistance and a preparation method thereof. Background technique [0002] As a high-strength, tear-resistant, wear-resistant polymer material, polyurethane is widely used in daily life, industrial and agricultural production, and medicine. Traditional polyurethane is generally solvent-based, which emits a large amount of volatile organic compounds and causes serious environmental pollution. With the increasingly stringent environmental protection regulations and the gradual enhancement of people's environmental awareness, water-based polyurethanes have become the focus of people's research to replace solvent-based products. Water-based polyurethane has excellent physical and mechanical properties, does not contain or contains a small amount of volatile organic compounds, is safe in production and const...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/42C08G18/54C08G18/32C08G18/28
CPCC08G18/7671C08G18/281C08G18/3206C08G18/3275C08G18/4202C08G18/4208C08G18/423C08G18/544
Inventor 王继印陶灿徐杰
Owner 安徽思敬齐环保材料有限公司
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