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Quick-drying hydrophobic lacquer and preparation method thereof

A hydrophobic and bipyridine technology, applied in coatings, anti-corrosion coatings, natural resin coatings, etc., can solve the problems that hinder the road to industrialization, the drying speed of raw lacquer is slow, and the hydrophobic performance is general, so as to achieve fast drying speed, reduce time cost, The effect of good hydrophobicity

Active Publication Date: 2019-04-02
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has good corrosion resistance, antibacterial properties, oxidation stability, and thermal stability. So far, no synthetic coating can surpass the fastness and durability, and it is naturally pollution-free. It is an environmentally friendly material and is widely used in Civilian furniture, craft manufacturing, infrastructure construction, military industry and other fields
[0003] However, the drying speed of raw lacquer is slow and its hydrophobic performance is average, which greatly hinders its industrialization.

Method used

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  • Quick-drying hydrophobic lacquer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step (1) Preparation of aminated silica: use toluene as solvent, add nano-silica and (3-aminopropyl)triethoxysilane to heat and reflux for 24 hours, wash and dry to obtain aminated nano-silica silicon oxide.

[0022] Step (2) Reaction of 4-formaldehyde-2,2'-bipyridine with aminated nano-silica in toluene under reflux to obtain silica-loaded bipyridine. Afterwards, copper acetate was added to make it react to obtain a bipyridyl Cu(II) complex loaded with nano-silica.

[0023] Step (3) Add 1% bipyridine Cu(II) complex loaded with nano-silica to the raw lacquer, use toluene as solvent, stir for 0.5 h, adjust the humidity to 50%, and dry at room temperature to form a film.

Embodiment 2

[0025] Step (1) Preparation of aminated silica: use toluene as solvent, add nano-silica and 3-aminopropyldimethylmethoxysilane to heat and reflux for 24 hours, wash and dry to obtain aminated nano-silica silicon.

[0026] Step (2) Reaction of 4-formaldehyde-2,2'-bipyridine with aminated nano-silica in toluene under reflux to obtain silica-loaded bipyridine. Afterwards, copper chloride is added to make it react to obtain bipyridyl Cu(II) complex loaded with nano-silica.

[0027] Step (3) Add 5% bipyridyl Cu(II) complex loaded with nano-silica to the raw lacquer, use toluene as solvent, stir for 2 h, adjust the humidity to 75%, and dry at room temperature to form a film.

Embodiment 3

[0029] Step (1) Preparation of aminated silica: use toluene as solvent, add nano-silica and 3-aminopropyldimethylmethoxysilane to heat and reflux for 24 hours, wash and dry to obtain aminated nano-silica silicon.

[0030] Step (2) Reaction of 4-formaldehyde-2,2'-bipyridine with aminated nano-silica in toluene under reflux to obtain silica-loaded bipyridine. Afterwards, copper sulfate and copper are added to make it react to obtain bipyridyl Cu(II) complex loaded with nano-silica.

[0031] Step (3) Add 5% bipyridine Cu(II) complex loaded with nano-silica to the raw lacquer, use toluene as solvent, stir for 3 h, adjust the humidity to 75%, and dry at room temperature to form a film.

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Abstract

The invention provides quick-drying hydrophobic lacquer and a preparation method thereof. The preparation method comprises the following steps: performing aldehyde-ammonia condensation on 4-formaldehyde-2,2'-bipyridine and aminated nano silicon dioxide, adding a copper salt, performing a reaction to obtain a nano silicon dioxide supported bipyridyl Cu(II) complex, adding the nano silicon dioxide supported bipyridyl Cu(II) complex into raw lacquer, and performing uniform stirring to prepare a raw lacquer composite film. According to the invention, the natural raw lacquer is utilized as a raw material, the nano silicon dioxide supported bipyridyl Cu(II) complex is added, so that laccase activity is improved, the drying time of a lacquer film is reduced, and roughness of the surface of the lacquer film is increased to make a contact angle of the surface of the lacquer film is increased; therefore the quick-drying hydrophobic lacquer with a fast drying speed and good hydrophobic performance is obtained. The surface of the lacquer film can be dried in half an hour, and the contact angle reaches up to 100 degrees; and time cost in production is greatly saved, corrosion resistance of thelacquer film to moist atmosphere, acid rain, seawater and salt spray is improved, and foundation of industrialization of raw lacquer is laid.

Description

technical field [0001] The invention belongs to the technical field of natural polymer materials, and in particular relates to a quick-drying hydrophobic paint and a preparation method thereof. Background technique [0002] Raw lacquer, also known as "Chinese lacquer" and "big lacquer", is a unique high-quality natural plant resource in my country. It is the secretion of sumac tree and is a water-in-oil emulsion. %), also contains laccase (<1%), polysaccharide (5%-7%), water (20%-30%) and so on. Raw lacquer enjoys the reputation of "the treasure of the country" and "the king of paint". It has good corrosion resistance, antibacterial properties, oxidation stability, and thermal stability. So far, no synthetic coating can surpass the fastness and durability, and it is naturally pollution-free. It is an environmentally friendly material and is widely used in Civilian furniture, craft manufacturing, infrastructure construction, military industry and other fields. [0003] H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D193/00C09D5/08C09D7/61C09D7/63
CPCC08K2201/011C09D5/08C09D193/00C09D7/62C09D7/63C08K9/12C08K9/06C08K5/0091C08K3/36
Inventor 林棋官美琴林珍珍夏建荣
Owner MINJIANG UNIV
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