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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 preparation method, so as to solve the technical problems of the above-mentioned water-based polyurethane resin, such as low water contact angle and complicated preparation.

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
Effect test

Embodiment 1

[0037] A water-based fluorine-containing resin, calculated in parts by weight, 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, A solvent and a catalyst, wherein the solvent is acetone; the catalyst is dibutyltin dilaurate.

[0040] The concrete steps of the preparation method of described aqueous fluororesin are:

[0041] 1) Add hexafluoroisopropanol, isophorone diisocyanate, and the catalyst into the four-necked flask in sequence, raise the temperature to 30°C, and add the solvent into the four-necked flask at a rate of 0.05ml / s in proportion, React for 1 h under stirring, then add trimethylolpropane in proportion, raise the temperature to 70°C, and react for 5 h under stirring to obtain the fluorine-co...

Embodiment 2

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

[0055]

[0056] Wherein, the polyether polyol is a mixture of PTMG1000 and N210 in a mass ratio of 1:1. Described neutralizing agent is triethylamine. Calculated in parts by weight, the raw materials for the preparation of the fluorine-containing chain extender include hexafluoroisopropanol, isophorone diisocyanate, trimethylolpropane, Solvent and catalyst, wherein, described solvent is the mixture that acetone, ethyl acetate form by volume ratio 1:1; Described catalyst is dibutyltin dilaurate;

[0057] The specific steps of the preparation method of the water-based fluorine-containing resin are as follows: 1) adding hexafluoroisopropanol, isophorone diisocyanate, and catalyst into a four-necked flask in proportion, raising the temperature to 50°C, and adding The solvent was added into the four-necked flask at a rate of 0.1ml / s, stirred and reacted for 1...

Embodiment 3

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

[0064]

[0065] Wherein, the polyether polyol is N210. Described neutralizing agent is triethylamine. Calculated in parts by weight, the raw materials for the preparation of the fluorine-containing chain extender include hexafluoroisopropanol, isophorone diisocyanate, trimethylolpropane, Solvent and catalyst, wherein, described solvent is ethyl acetate; Described catalyst is dibutyltin dilaurate;

[0066] The specific steps of the preparation method of the water-based fluorine-containing resin are as follows: 1) adding hexafluoroisopropanol, isophorone diisocyanate, and a catalyst into a four-necked flask in proportion, raising the temperature to 35°C, and adding The solvent was added into the four-necked flask at a speed of 0.08ml / s, and reacted for 2 hours under stirring, then trimethylolpropane was added in proportion, the temperature was raised to 80...

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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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