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Waterproof high-hardness waterborne polyurethane coating

A water-based polyurethane, water-based polyaniline technology, applied in anti-corrosion coatings, coatings and other directions, can solve the problems of small hardness, small molecular weight, water resistance and service life of water-based polyurethane coatings can not meet the requirements of society

Inactive Publication Date: 2015-01-28
WUHU SHUANGBAO BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the molecular chain chemical structure of water-based polyurethane is the same as that of solvent-based polyurethane, compared with solvent-based polyurethane, there are still some defects in performance, such as small molecular weight, poor water resistance and low hardness, which limit its application.
At present, waterborne polyurethane coatings cannot meet the requirements of society in terms of water resistance and service life, and need to be modified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The water-resistant high-hardness water-based polyurethane coating of the present invention, its raw material comprises the following components by weight: 65 parts of modified water-based polyurethane, 35 parts of water-based polyaniline, 3 parts of polyisocyanate, 20 parts of nano silicon dioxide, 3 parts of isopropanol 10 parts of ethylene glycol propyl ether, 0.5 parts of dipentaerythritol, 20 parts of polydimethylsiloxane, 3 parts of γ-isocyanate propyl triethoxysilane, 8 parts of polytetrafluoroethylene, modified carbon nanotubes 0.5 parts, 20 parts of precipitated barium sulfate, 2 parts of amino resin, 8 parts of zinc powder, 30 parts of water;

[0017]Wherein, the modified water-based polyurethane is prepared according to the following process: under the protection of nitrogen, 40 parts of polyethylene glycol, 25 parts of glucose and 50 parts of isophorone diisocyanate are added to the flask by weight, and the Stir and heat up to 87°C, react for 2.5 hours, cool...

Embodiment 2

[0019] The water-resistant high-hardness water-based polyurethane coating of the present invention, its raw material comprises the following components by weight: 80 parts of modified water-based polyurethane, 20 parts of water-based polyaniline, 6 parts of polyisocyanate, 5 parts of nano silicon dioxide, 9 parts of isopropanol 5 parts, 5 parts of ethylene glycol propyl ether, 1.6 parts of dipentaerythritol, 15 parts of polydimethylsiloxane, 8 parts of γ-isocyanate propyl triethoxysilane, 3 parts of polytetrafluoroethylene, modified carbon nanotubes 3 parts, 5 parts of precipitated barium sulfate, 6 parts of amino resin, 3 parts of zinc powder, 60 parts of water; The nano-silica is aminosilane coupling agent modified nano-silica;

[0020] Wherein, the modified water-based polyurethane is prepared according to the following process: under the protection of nitrogen, 50 parts of polyethylene glycol, 15 parts of glucose and 60 parts of isophorone diisocyanate are added to the flas...

Embodiment 3

[0022] The water-resistant high-hardness water-based polyurethane coating of the present invention, its raw material comprises the following components by weight: 77 parts of modified water-based polyurethane, 23 parts of water-based polyaniline, 3.9 parts of polyisocyanate, 13.4 parts of nano silicon dioxide, 5.6 parts of isopropanol 8.4 parts of ethylene glycol propyl ether, 1.37 parts of dipentaerythritol, 18 parts of polydimethylsiloxane, 5 parts of γ-isocyanate propyl triethoxysilane, 6 parts of polytetrafluoroethylene, modified carbon nanotubes 2.26 parts, 18 parts of precipitated barium sulfate, 4.5 parts of amino resin, 6.3 parts of zinc powder, 52 parts of water; the nano-silica is aminosilane coupling agent KH550 modified nano-silica;

[0023] Wherein, the modified water-based polyurethane is prepared according to the following process: under the protection of nitrogen, 46 parts of polyethylene glycol, 19 parts of glucose and 52 parts of isophorone diisocyanate are ad...

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Abstract

The invention discloses a waterproof high-hardness waterborne polyurethane coating which is characterized by comprising the following components in parts by weight: 65-80 parts of modified waterborne polyurethane, 20-35 parts of waterborne polyaniline, 3-6 parts of polyisocyanate, 5-20 parts of nano-silica, 3-9 parts of isopropanol, 5-10 parts of ethylene glycol propyl ether, 0.5-1.6 parts of dipentaerythritol, 15-20 parts of polydimethylsiloxane, 3-8 parts of gamma-isocyanate propyl triethoxy silane, 3-8 parts of polytetrafluoroethylene, 0.5-3 parts of modified carbon nanotubes, 5-20 parts of precipitated barium sulphate, 2-6 parts of amino resin, 3-8 parts of zinc powder and 30-60 parts of water. The waterproof high-hardness waterborne polyurethane coating is good in water resistance, high in harness and long in service life.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-resistant high-hardness water-based polyurethane coating. Background technique [0002] Polyurethane refers to a general term for a class of polymers containing urethane bonds in the main chain of the molecule, and is usually produced by the polyaddition reaction of isocyanate and polyol. Water-based polyurethane uses water as the dispersion medium, which has the advantages of being environmentally friendly, non-toxic, and difficult to burn, and can adjust the comprehensive properties of the resin material by changing the type and proportion of soft and hard segments. Since water-based polyurethane was introduced into the market in the late 1960s, water-based polyurethane has been widely used for its excellent bonding ability, excellent temperature change resistance, excellent low temperature resistance, good biocompatibility, and environmental protection and non-toxic p...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D179/02C09D183/04C09D127/18C09D161/20C09D5/08C09D7/12C08G18/75C08G18/66C08G18/48C08G18/64C08G18/12
CPCC09D175/08C08G18/0823C08G18/12C08G18/4833C08G18/6692C08G2150/90C08K2201/011C08L2205/035C09D5/08C09D7/61C09D7/63
Inventor 胡昌悌
Owner WUHU SHUANGBAO BUILDING MATERIAL
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