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Anionic/cationic polyurethane resin and preparation method thereof

A polyurethane resin, anion and cation technology, applied in the field of polyurethane, can solve the problems of low hardness and general adhesion, and achieve the effects of good sealing, good wettability and good water resistance.

Inactive Publication Date: 2015-12-23
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, at present, the production process of cationic water-based polyurethane is prone to violent gelation, while the commonly used anionic water-based polyurethane has low hardness and general adhesion. Therefore, it is urgent to develop a product with high adhesion and high hardness to meet the needs of the market.

Method used

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  • Anionic/cationic polyurethane resin and preparation method thereof

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preparation example Construction

[0029] refer to figure 1 , the preparation method of a kind of anion-cation type polyurethane resin that the present invention proposes, comprises the following steps:

[0030] S1. Warm up and melt terephthalic anhydride polyester diol and polyneopentyl glycol-1,6-hexanediol adipate diol, keep warm, and then vacuum dehydrate to obtain the first material;

[0031] S2. Add hexamethylene diisocyanate to the first material, heat up, keep warm, add dipropylene glycol, 2-(hydroxymethyl)phenylboronic acid half ester, epoxy resin and N,N-dimethyl Formamide, add ferric chloride again, heat up, keep warm, obtain the second material;

[0032] S3. After cooling the second material, add dropwise a mixed solution containing N-ethyldiethanolamine and bis(2-hydroxypropyl)aniline, heat up, and keep warm to obtain the third material;

[0033] S4. Add acetic acid to the third material for neutralization, and vacuum distill to obtain anionic and cationic polyurethane resins.

Embodiment 1

[0036] The preparation method of a kind of anion-cation type polyurethane resin that the present invention proposes comprises the following steps:

[0037] S1. Heat 45 parts of terephthalic anhydride polyester diol and 35 parts of polyneopentyl adipate-1,6-hexanediol adipate diol to 110°C by weight, keep warm for 3 hours, and then vacuum dehydrate get the first material;

[0038] S2. Add 40 parts of hexamethylene diisocyanate to the first material, raise the temperature to 94°C, keep it warm for 2.5h, and after cooling down to 56°C, add 10 parts of dipropylene glycol and 1 part of 2-(hydroxymethyl)benzene boric acid half ester, 3 parts of epoxy resin and 40 parts of N,N-dimethylformamide, then add 0.5 part of ferric chloride, raise the temperature to 86°C, keep the temperature for 3 hours, and obtain the second material;

[0039] S3. After cooling the second material to 50°C, add dropwise a mixed solution containing N-ethyldiethanolamine and bis(2-hydroxypropyl)aniline, where...

Embodiment 2

[0042] The preparation method of a kind of anion-cation type polyurethane resin that the present invention proposes comprises the following steps:

[0043] S1. Heat 65 parts by weight of terephthalic anhydride polyester diol and 20 parts of polyneopentyl glycol adipate-1,6-hexanediol to 125°C, keep it warm for 1.5h, then vacuum Dehydration obtains the first material;

[0044] S2. Add 55 parts of hexamethylene diisocyanate to the first material, raise the temperature to 88°C, keep it warm for 3.5h, and after cooling down to 48°C, add 13 parts of dipropylene glycol and 0.7 parts of 2-(hydroxymethyl)benzene boric acid half ester, 6 parts of epoxy resin and 30 parts of N,N-dimethylformamide, then add 0.8 parts of ferric trichloride, raise the temperature to 80°C, and keep it warm for 6 hours to obtain the second material;

[0045] S3. After cooling the second material to 40°C, add dropwise a mixed solution containing N-ethyldiethanolamine and bis(2-hydroxypropyl)aniline, wherein ...

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Abstract

The invention discloses anionic / cationic polyurethane resin. The invention also discloses a preparation method of the anionic / cationic polyurethane resin. The preparation method comprises the following steps: heating terephthalic acid anhydride polyester glycol and poly(neopentyl glycol adipate)-1,6-hexanediol glycol to be molten, insulating the materials and then carrying out vacuum dehydration to obtain a first material; adding hexamethylene diisocyanate to the first material, heating and insulating the materials, adding dipropylene glycol, 2-(hydroxymethyl)phenylboronic acid hemi-ester, epoxy resin and N,N-dimethylformamide after cooling, then adding ferric trichloride and heating and insulating the materials to obtain a second material; after cooling the second material, dropwise adding a mixed solution containing N-ethyldiethanolamine and bis(2-hydroxypropyl)aniline and heating and insulating the materials to obtain a third material; after adding acetic acid to the third material for neutralization, carrying out vacuum distillation, thus obtaining the anionic / cationic polyurethane resin.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to an anion-cation type polyurethane resin and a preparation method thereof. Background technique [0002] Polyurethane, or polyurethane, is a general term for polymer materials that contain repeating urethane (-NHCOO-) structures in their molecular chains. Polyurethane is generally made of diisocyanate and diol or polyol as the basic material through polyaddition reaction. Depending on the number of functional groups of the raw materials, it can be made into a polymer with a linear or body structure, which has good mechanical properties and bonding properties. And wear resistance, etc., have been widely used in various fields. [0003] However, at present, most polyurethane resins still use solvent-based polyurethane resins, and the large-scale and frequent persistent haze weather makes people realize the seriousness of VOC emissions. Waterborne polyurethane resin is more an...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/08C08G18/66C08G18/32C08G18/73C08G18/58C08G18/12
CPCC08G18/0809C08G18/0828C08G18/12C08G18/3206C08G18/3215C08G18/3275C08G18/4202C08G18/4213C08G18/4238C08G18/58C08G18/664C08G18/73
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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