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Nano-TiO2 modified acrylic polyurethane finish paint and preparation method thereof

A technology of nano-titanium dioxide and acrylic polyurethane, applied in the direction of coating, etc., can solve the problem of insufficient modified acrylic polyurethane topcoat, and achieve the effect of excellent film flexibility, high application value, and improved performance of salt water immersion resistance

Inactive Publication Date: 2014-09-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, about nano-TiO 2 There are not many studies on modified acrylic polyurethane topcoats, among which nano-TiO 2 There are few reports on the research of modified acrylic polyurethane topcoat after surface treatment.

Method used

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  • Nano-TiO2 modified acrylic polyurethane finish paint and preparation method thereof
  • Nano-TiO2 modified acrylic polyurethane finish paint and preparation method thereof
  • Nano-TiO2 modified acrylic polyurethane finish paint and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] The present invention, a kind of nano-titanium dioxide modified acrylic polyurethane topcoat and preparation method thereof, specifically comprises the following steps:

[0029] Step 1. Preparation of modified nano-titanium dioxide powder: place 5 g of nano-titanium dioxide with a particle size of 20 nanometers in an oven to dry for 12 hours, dissolve with a certain amount of absolute ethanol, and pre-disperse for 0.5 hours under ultrasonic conditions. To obtain a pre-dispersed solution, add 0.05 g of γ-methacryloxypropyltrimethoxysilane coupling agent to the pre-dispersed solution and mix thoroughly to obtain a mixed solution. The mixed solution is heated at a temperature of 60 ° C and a rotational speed of Under the condition of 800r / min, the nanoparticle surface is modified by high-speed dispersion, and the modified nano-solution is concentrated and dried at 90°C to obtain the modified nano-titanium dioxide powder;

[0030] Step 2, preparation of acrylic polyurethane...

Embodiment 2

[0034] The present invention, a kind of nano-titanium dioxide modified acrylic polyurethane topcoat and preparation method thereof, specifically comprises the following steps:

[0035] Step 1. Preparation of modified nano-titanium dioxide powder: place 5 g of nano-titanium dioxide with a particle size of 40 nanometers in an oven to dry for 12 hours, dissolve with a certain amount of absolute ethanol, and pre-disperse for 0.5 hours under ultrasonic conditions. To obtain a pre-dispersed solution, add 0.10 g of γ-aminopropyltriethoxysilane coupling agent to the pre-dispersed solution and fully mix to obtain a mixed solution. High-speed dispersion under high-speed conditions for surface modification of nanoparticles, concentration and drying of the modified nano-solution at 90°C to obtain modified nano-titanium dioxide powder;

[0036] Step 2, preparation of acrylic polyurethane resin: 50g of acrylic modified polyurethane resin is subjected to vacuum distillation under the conditi...

Embodiment 3

[0040] The present invention, a kind of nano-titanium dioxide modified acrylic polyurethane topcoat and preparation method thereof, specifically comprises the following steps:

[0041] Step 1. Preparation of modified nano-titanium dioxide powder: place 5 g of nano-titanium dioxide with a particle size of 60 nanometers in an oven to dry for 12 hours, dissolve with a certain amount of absolute ethanol, and pre-disperse for 0.5 hours under ultrasonic conditions. To obtain a pre-dispersed solution, add 0.05 g of γ-methacryloxypropyltrimethoxysilane coupling agent to the pre-dispersed solution and mix thoroughly to obtain a mixed solution. Under the condition of 800r / min, the nanoparticle surface is modified by high-speed dispersion, and the modified nano-solution is concentrated and dried at 90°C to obtain the modified nano-titanium dioxide powder;

[0042] Step 2, preparation of acrylic polyurethane resin: 50g of acrylic modified polyurethane resin is subjected to vacuum distilla...

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Abstract

The invention discloses a preparation method of nano-TiO2 modified acrylic polyurethane finish paint, and belongs to the technical field of nanometer technology and corrosion protection technology. The preparation method helps to solve the problems that acrylic polyurethane finish paint in the prior art is bad in salt-spray ageing resistance and salt-water immersion resistance and the like. The preparation method comprises: firstly adding a coupling agent into a titanium dioxide solution, performing high-speed dispersion, and performing concentration and the like, so as to obtain a modified nanometer titanium dioxide powder; successively adding a solvent, a color filler, an auxiliary agent and a catalyst into acrylic-modified polyurethane resin, and fully reacting to obtain acrylic polyurethane resin; and finally adding the modified nanometer titanium dioxide powder into the acrylic polyurethane resin to performing a grafting reaction, curing and drying to obtain the nano-TiO2 modified acrylic polyurethane finish paint. The prepared finish paint is simple in preparation method, and has extremely high application value on facilities such as coastal buildings, steel bridges, petroleum petrochemical pipelines and storage tanks, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanotechnology and corrosion protection, and in particular relates to a nano titanium dioxide modified acrylic polyurethane topcoat and a preparation method thereof. Background technique [0002] Acrylic polyurethane topcoat is a coating that has developed rapidly in recent years. It has good hardness and flexibility, good weather resistance and gloss retention, good drying performance and fast surface drying. It can be surfaced in about half an hour. Dry. However, this topcoat will become less neutral, easy to lose gloss, change color and easy to foam in the environment of high temperature and high humidity. It is extremely unsuitable for use in some coastal areas. At present, it is often modified to improve anti-corrosion performance. [0003] The commonly used modification methods of propionic acid polyurethane topcoat include epoxy resin modification, organic silicon modification and nano-inorganic m...

Claims

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Application Information

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IPC IPC(8): C09D187/00C08G83/00
Inventor 李春玲王培孙阳超纪贤晶王秀民陈生辉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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