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Method for preparing nano composite coating of urushiol acetal epoxy resin/TiO2

A technology of urushiol acetal epoxy resin and acetal epoxy resin, which is applied in the field of preparing nano-coatings, can solve the problems of poor mechanical properties, heat resistance, acid and alkali corrosion resistance, etc., and achieve strong ultraviolet absorption, Strong aging resistance and high refractive index effect

Inactive Publication Date: 2005-10-26
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of titanium dioxide used in the existing ordinary raw lacquer coatings is generally micron, and its mechanical properties, heat resistance and acid and alkali corrosion resistance are not very good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: take by weighing 0.8g TiO 2 Powder, add 200mL 0.7% sodium dodecylsulfonate solution, adjust the pH value to 5, stir for 6h, wash, filter, and dry to obtain white TiO 2 Powder. Will get TiO 2 Add the powder into n-butanol, and ultrasonicate for 20 minutes after stirring for 1 hour, until the nano-TiO 2 The powder is completely and evenly dispersed. Get the urushiol acetal epoxy resin of 30g, the processed containing nano-TiO 2 Add n-butanol solution to it, stir until it is completely dispersed, and get urushiol acetal epoxy resin / TiO 2 Nano-composite new coatings. Dry after coating.

Embodiment 2

[0012] Embodiment 2: take by weighing 1g TiO 2 Powder, add 200mL 0.9% sodium dodecylsulfonate solution, adjust the pH value to 4, stir for 5h, wash, filter and dry to obtain white TiO 2 Powder. Will get TiO 2 Add the powder into xylene, and ultrasonicate for 20 minutes after stirring for 1 hour, until the nano-TiO 2 The powder is completely and evenly dispersed. Get the urushiol acetal epoxy resin of 20g, the processed containing nano-TiO 2 Xylene solution was added therein, and stirred until it was completely dispersed uniformly to obtain urushiol acetal epoxy resin / TiO 2 Nano-composite new coatings. Dry after coating.

Embodiment 3

[0013] Embodiment 3: take by weighing 1.2g TiO 2 Powder, add 200mL 0.6% sodium lauryl sulfate solution, adjust the pH value to 7, stir for 6h, wash, filter, and dry to obtain white TiO 2 Powder. TiO will be obtained 2 Add the powder into n-butanol, and ultrasonicate for 20 minutes after stirring for 1 hour, until the nano-TiO 2 The powder is completely and evenly dispersed. Get the urushiol acetal epoxy resin of 15g, the processed containing nano-TiO 2 Add n-butanol solution to it, stir until it is completely dispersed, and get urushiol acetal epoxy resin / TiO 2 Nano-composite new coatings. Dry after coating.

[0014] In the embodiment, the urushiol acetal epoxy resin is prepared by reacting urushiol and formaldehyde under the catalysis of ammonia water to obtain urushiol formal, and then cross-linking with epoxy resin.

[0015]

[0016] It can be known from the test results that the urushiol acetal epoxy resin / TiO 2 The mechanical properties, heat resistanc...

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PUM

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Abstract

The present invention discloses a method for preparing urushiol acetal epoxy resin / TiO2 nano composite paint. Said method is characterized by that after the raw material nano TiO2 particles are modified by using anionic surface active agent, the modified raw material nano TiO2 particles can be mixed with urushiol epoxy resin, and undergone the process of ultrasonic treatment so as to obtain the uniformly-dispersed nano composite paint with excellent mechanical property and acid-resisting, alkali-resisting and high-temperature-resisting properties. Said invention also provides its application range.

Description

technical field [0001] The invention relates to a method for preparing nano-coatings by using natural renewable resource raw lacquer as a raw material, belonging to the field of renewable resource chemistry. Background technique [0002] Raw lacquer is a kind of physiological secretion of lacquer tree. It is also a traditional native product with a long history in China. It has been used in my country for thousands of years. It is known as the "king of paint" because of its high gloss and super durability. Urushiol is one of the main components of raw lacquer (50%-70%), and is also the main film-forming substance of raw lacquer, with excellent physical and chemical properties. But it also has some disadvantages, such as: serious toxicity to the human body, high viscosity, difficult construction, poor alkali resistance, etc., which seriously limit its use. Therefore, the modification of urushiol is very important. At present, the modification of urushiol mainly focuses on b...

Claims

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Application Information

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IPC IPC(8): C09D163/00
Inventor 杜予民陈博杨建红
Owner WUHAN UNIV
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