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Graphene modified waterborne polyurethane-epoxy resin and preparation method thereof

A water-based polyurethane and graphene modification technology, which is applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor hydrolysis resistance and achieve excellent performance, extremely low VOC content, and good electrical conductivity.

Inactive Publication Date: 2019-04-12
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems described above, the present invention introduces epoxy resin in the form of chemical bonds in the molecular structure of the polyurethane resin to modify, and the modified polyurethane resin has properties such as good corrosion resistance, good adhesion and ozone resistance; at the same time The introduction of polyether polyols has effectively improved the problems of poor hydrolysis resistance of polyurethane-epoxy resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of graphene modified waterborne polyurethane-epoxy resin, its preparation process is as follows:

[0026] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 3.0 parts of butanediol, 1.5 parts of trimethylolpropane, 6.0 parts of polytetrahydrofuran ether glycol, dihydroxy 2.6 parts of methacrylic acid, heat up to 100℃~110℃ for vacuum dehydration for 1.5~2.0h;

[0027] b. Cool down to 70°C to 75°C, vacuumize, blow in nitrogen to release the pressure, add 1.5 parts of graphene, 8.0 parts of epoxy resin, and dropwise add 14.0 parts of hexamethylene diisocyanate, and the addition is completed in 0.5 to 1 hour. Then add 0.05 parts of dibutyltin dilaurate dropwise, raise the temperature to 80-82°C for 2-2.5 hours, add 6.0 parts of acetone depending on the viscosity of the system, and measure the NCO value until it is consistent with the design value;

[0028] c. Continue to stir to lower the temperature below 35°C, slowly add 1.9 p...

Embodiment 2

[0030] A kind of graphene modified waterborne polyurethane-epoxy resin, its preparation process is as follows:

[0031] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 2.5 parts of butanediol, 1.5 parts of glycerin, 7.0 parts of polytetrahydrofuran ether glycol, and dimethylol propionic acid in order according to the weight of the formula 2.8 parts, heated to 100℃~110℃ for vacuum dehydration for 1.5~2.0h;

[0032] b. Cool down to 70°C to 75°C, vacuumize, blow in nitrogen to release the pressure, add 1.5 parts of graphene, 4.0 parts of epoxy resin, and dropwise add 16.0 parts of isophorone diisocyanate, and the addition is completed in 0.5 to 1 hour. Then add 0.05 parts of dibutyltin dilaurate dropwise, raise the temperature to 80-82°C for 2-2.5 hours, add 6.0 parts of acetone depending on the viscosity of the system, and measure the NCO value until it is consistent with the design value;

[0033] c. Continue to stir to lower the temper...

Embodiment 3

[0035] A kind of graphene modified waterborne polyurethane-epoxy resin, its preparation process is as follows:

[0036] a. In a four-port reactor equipped with a thermometer, a condenser, and an agitator, add 2.2 parts of neopentyl glycol, 1.2 parts of trimethylolpropane, 6.5 parts of polyether glycol, and two 2.4 parts of hydroxymethylpropionic acid, heated to 100℃~110℃ for vacuum dehydration for 1.5~2.0h;

[0037] b. Cool down to 70°C to 75°C, vacuumize, blow in nitrogen to release the pressure, add 1.6 parts of graphene, 9.0 parts of epoxy resin, and dropwise add 14.0 parts of toluene diisocyanate, and the addition is completed in 0.5 to 1 hour. Then add 0.05 parts of dibutyltin dilaurate dropwise, raise the temperature to 80-82°C for 2-2.5 hours, add 6.5 parts of acetone depending on the viscosity of the system, and measure the NCO value until it is consistent with the design value;

[0038] c. Continue stirring to lower the temperature below 35°C, slowly add 2.0 parts of n...

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PUM

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Abstract

The invention relates to a graphene modified waterborne polyurethane-epoxy resin and a preparation method thereof. The graphene modified waterborne polyurethane-epoxy resin is composed of, in parts byweight, 8.0-20.0 parts of polyisocyanate, 2.0-6.0 parts of polyol, 0.5 to 2.0 parts of polyamine chain extender, 4.0-10.0 parts of oligomer polyether polyol, 1.5-4.5 parts of dimethylolpropionic acid, 4.0-15.0 parts of epoxy resin, 0.01-0.1 part of dibutyltin dilaurate, 0.5-2.5 parts of graphene, 4.0-10.0 parts of acetone, 1.0 to 3.0 parts of neutralizer and 48.0 to 68.0 parts of distilled water.The graphene modified waterborne polyurethane-epoxy resin disclosed by the present invention is characterized by good adhesion, corrosion resistance, water resistance, alkali resistance, wear resistance, anti-static property, high hardness and the like, and can be widely used in the field of ocean engineering, iron components, wood coatings, anti-static coatings, conductive coatings, and antifouling and waterproofing coatings with enormous application potential.

Description

technical field [0001] The invention relates to a preparation method of a modified waterborne polyurethane-epoxy resin, in particular to a multifunctional graphene-modified waterborne polyurethane-epoxy resin and a preparation method thereof, belonging to the technical field of waterborne resin synthesis. Background technique [0002] The advantage of the polyurethane system is that there are abundant dibasic acid and diol polymerizable monomers to choose from, which are mainly formed by the reaction of alcohol and isocyanate. The reaction raw materials and process factors have a great influence on the shape of polyurethane materials, so it can be used according to different It is required to organically combine the soft segment and the hard segment to achieve the purpose of the design. However, polyurethane resin has problems such as easy foaming when exposed to moisture, poor acid and alkali resistance, etc. General polyurethane has high insulation and is prone to static e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/58C08G18/48C08G18/32C08G18/34C08G18/12C08K3/04C09D175/08C09D175/04C09D5/24C09D5/08
CPCC08G18/12C08G18/3206C08G18/348C08G18/4045C08G18/4854C08G18/58C08G18/6674C08G18/6677C08G18/6692C08G2150/90C09D5/08C09D5/24C09D175/04C09D175/08C08G18/3228
Inventor 张武康伦国姚东生许钧强阳京辉
Owner UNION FOSHAN CHEM
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