Aqueous fluorine-containing resin and preparation method thereof

A fluorine-containing resin, water-based technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problems of low water contact angle and complex preparation, and achieve the effect of high contact angle, good film-forming performance and improved mechanical properties

Inactive Publication Date: 2019-06-21
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a water-based fluorine-containing resin that is easy to prepare and easy to produce on a large scale and its pre

Method used

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  • Aqueous fluorine-containing resin and preparation method thereof
  • Aqueous fluorine-containing resin and preparation method thereof
  • Aqueous fluorine-containing resin and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0036] Example 1

[0037] A water-based fluorine-containing resin, calculated in parts by weight, and its preparation raw materials include:

[0038]

[0039] Wherein, the polyether polyol is PTMG1000; the neutralizer is triethylamine. Calculated in parts by weight, the raw materials for the preparation of the fluorine-containing chain extender include hexafluoroisopropanol, isophorone diisocyanate, trimethylolpropane, and the weight ratio of 100:100:60:10:0.01. Solvent and catalyst, wherein the solvent is acetone; and the catalyst is dibutyltin dilaurate.

[0040] The specific steps of the method for preparing the aqueous fluororesin are:

[0041] 1) Add hexafluoroisopropanol, isophorone diisocyanate, and catalyst to the four-necked flask in sequence, increase the temperature to 30°C, and add the solvent to the four-necked flask at a rate of 0.05ml / s in proportion. React for 1 hour with stirring, then add trimethylolpropane in proportion, heat to 70°C, and react for 5 hours with s...

Example Embodiment

[0053] Example 2

[0054] A water-based fluorine-containing resin, calculated in parts by weight, and its preparation raw materials include:

[0055]

[0056] Wherein, the polyether polyol is a mixture composed of PTMG1000 and N210 at a mass ratio of 1:1. The neutralizer is triethylamine. Calculated in parts by weight, the raw materials for the preparation of the fluorine-containing chain extender include hexafluoroisopropanol, isophorone diisocyanate, trimethylolpropane, and the weight ratio of 200:200:100:100:0.02. Solvent and catalyst, wherein the solvent is a mixture of acetone and ethyl acetate in a volume ratio of 1:1; the catalyst is dibutyltin dilaurate;

[0057] The specific steps of the method for preparing the water-based fluororesin are: 1) Add hexafluoroisopropanol, isophorone diisocyanate, and catalyst to a four-necked flask in sequence, increase the temperature to 50°C, and add The solvent was added to the four-necked flask at a rate of 0.1ml / s, reacted for 1h with...

Example Embodiment

[0062] Example 3

[0063] A water-based fluorine-containing resin, calculated in parts by weight, and its preparation raw materials include:

[0064]

[0065] Wherein, the polyether polyol is N210. The neutralizer is triethylamine. Calculated in parts by weight, the raw materials for the preparation of the fluorine-containing chain extender include hexafluoroisopropanol, isophorone diisocyanate, trimethylolpropane, and the weight ratio of 150:150:80:30:0.015. Solvent and catalyst, wherein the solvent is ethyl acetate; the catalyst is dibutyltin dilaurate;

[0066] The specific steps of the water-based fluororesin preparation method are as follows: 1) Add hexafluoroisopropanol, isophorone diisocyanate, and catalyst to a four-necked flask in sequence, increase the temperature to 35°C, and add The solvent was added to the four-necked flask at a speed of 0.08ml / s and reacted for 2h under stirring, then added trimethylolpropane in proportion, heated to 80°C, reacted under stirring fo...

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Abstract

The invention provides aqueous fluorine-containing resin which is characterized by comprising the following preparation raw materials in parts by weight: 30-60 parts of isophorone diisocyanate, 50-100parts of polyether polyol, 5-10 parts of dimethylolpropionic acid, 10-20 parts of a fluorine-containing chain extender, 5-10 parts of a neutralizing agent, 10-20 parts of ethanediamine and 230-460 parts of deionized water, wherein polyether polyol comprises one or a mixture of two of PTMG1000 and N210,and the neutralizing agent is triethylamine. A preparation method is mild in experiment conditions, simple to operate, and suitable for industrial production, and the aqueous fluorine-containing resin can be widely used for protecting airplanes, ships, buildings, traffic and various mechanical equipment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a water-based fluorine-containing resin and a preparation method thereof. Background technique [0002] Water-based polyurethane resin uses water as the main dispersion medium. It has the advantages of low price, safety and environmental protection, non-combustibility, and convenient use. It has been widely used in technical fields such as coating, leather finishing, fabric treatment, and ink. However, water-based polyurethane resins usually introduce hydrophilic groups or surfactants during the preparation process, which makes the water resistance of the resin film-forming material worse than that of solvent-based resins, and the surface properties are poor, which is specifically reflected in the low contact angle to water. Generally lower than 90°, which limits the application of waterborne polyurethane resin. In order to broaden the application range of ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/32C09D175/08
Inventor 张英强李美佳李烨
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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