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Epoxy modified nitrocellulose enamel and preparation method thereof

A technology of nitro enamel and epoxy modification, applied in epoxy resin coatings, coatings, anti-corrosion coatings and other directions, can solve the problems of poor flexibility, low gloss, poor adhesion, etc., and achieves a simple preparation method, Excellent adhesion and good oil resistance

Active Publication Date: 2013-11-27
天津灯塔涂料工业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gloss is not high, the adhesion is poor, the flexibility is not good, and the non-volatile content is very low, so many technical requirements cannot be met; due to the low solid content of this type of paint, it takes more paint from the primer, the middle coat to the top coat Time-consuming and time-consuming, the application gradually decreased after the 1970s

Method used

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  • Epoxy modified nitrocellulose enamel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An alkyd resin solution (64.1% by weight solids), consisting of tung oil, linseed oil, glycerin, lithium hydroxide, phthalic anhydride, refluxing xylene and xylene, wherein tung oil 18kg, linseed oil 21kg, glycerin 11kg, lithium hydroxide 0.02kg , phthalic anhydride 17kg, reflux xylene 4.5kg, xylene 33kg, concrete preparation steps are as follows:

[0042] (1) Add tung oil, linseed oil and glycerin to the reaction kettle and stir to raise the temperature;

[0043] (2) Pass CO 2 gas, heating up to 100°C and adding lithium hydroxide;

[0044] (3) Heat up to 220°C to maintain alcoholysis, and dissolve the sample in absolute ethanol until transparent;

[0045] (4) After passing the alcoholysis, cool down to 180°C and add phthalic anhydride and reflux xylene;

[0046] (5) After adding phthalic anhydride, raise the temperature to 210°C to maintain the reaction. When the acid value reaches 52mgKOH / g and the viscosity reaches 1.8 seconds, remove from the fire and cool down; ...

Embodiment 2

[0049] An alkyd resin liquid (66.7% by weight solids), consisting of tung oil, flax oil, glycerin, lithium hydroxide, phthalic anhydride, refluxing xylene and xylene, wherein 25kg of tung oil, 15kg of linseed oil, 5kg of glycerin, and 0.03kg of lithium hydroxide , phthalic anhydride 25kg, reflux xylene 5kg, xylene 30kg, the concrete preparation steps are as follows:

[0050] (1) Add tung oil, linseed oil and glycerin to the reaction kettle and stir to raise the temperature;

[0051] (2) Pass CO 2 gas, heating up to 100°C and adding lithium hydroxide;

[0052] (3) Heat up to 220°C to maintain alcoholysis, and dissolve the sample in absolute ethanol until transparent;

[0053] (4) After passing the alcoholysis, cool down to 180°C and add phthalic anhydride and reflux xylene;

[0054] (5) After adding phthalic anhydride, raise the temperature to 210°C to maintain the reaction. When the acid value reaches 55mgKOH / g and the viscosity reaches 1.5 seconds, remove from the fire and c...

Embodiment 3

[0057] An alkyd resin solution (66.7% by weight solids), consisting of tung oil, linseed oil, glycerin, lithium hydroxide, phthalic anhydride, refluxing xylene and xylene, wherein tung oil 15kg, linseed oil 25kg, glycerin 15kg, lithium hydroxide 0.01kg , phthalic anhydride 15kg, reflux xylene 3kg, xylene 32kg, the concrete preparation steps are as follows:

[0058] (1) Add tung oil, linseed oil and glycerin to the reaction kettle and stir to raise the temperature;

[0059] (2) Pass CO 2 gas, heating up to 100°C and adding lithium hydroxide;

[0060] (3) Heat up to 220°C to maintain alcoholysis, and dissolve the sample in absolute ethanol until transparent;

[0061] (4) After passing the alcoholysis, cool down to 180°C and add phthalic anhydride and reflux xylene;

[0062] (5) After adding phthalic anhydride, raise the temperature to 210°C to maintain the reaction. When the acid value reaches 45mgKOH / g and the viscosity reaches 2.0 seconds, remove from the heat and cool down...

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Abstract

The invention provides an epoxy modified nitrocellulose enamel and a preparation method thereof. The epoxy modified nitrocellulose enamel is prepared by stirring and mixing the following components in parts by weight: 30-45 parts of epoxy nitrocellulose enamel, 5-20 parts of pigment, 5-10 parts of talcum powder, 5-20 parts of precipitated barium sulphate, 2-6 parts of 10% bentonite pregel, 0.5-1.5 parts of dibutyl phthalate, 0.1-0.3 part of anti-settling agent CP-88, 25-40 parts of 1 / 2 second nitrocotton solution, 1.0-2.5 parts of dry mixed material, 0.1-0.3 part of 10% silicone oil and butyl ester solution and 1-5 parts of mixed solvent. The epoxy modified nitrocellulose enamel has favorable adhesive force, flexibility, glossiness and fullness.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to an epoxy-modified nitro enamel and a preparation method thereof. Background technique [0002] Cellulose varnish refers to a coating in which cellulose esters and cellulose ethers produced by chemical treatment of natural cellulose are the main film-forming substances. Its main varieties are nitrocellulose paint, cellulose acetate paint, ethyl cellulose paint and benzyl cellulose paint. [0003] Nitrocellulose paint has fast drying speed when used alone, high hardness of paint film, good wear resistance, weather resistance and durability, and is widely used in the finishing of metal surfaces, automobiles, aircrafts, leather, etc. However, the gloss is not high, the adhesion is poor, the flexibility is not good, and the non-volatile content is very low, so many technical requirements cannot be met; due to the low solid content of this type of paint, it takes more pain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/08C09D163/00C09D101/18C09D5/08C09D7/12C08G63/49
Inventor 黄继伟王志敏王德玲张玉彬许歌黄震刘建颖
Owner 天津灯塔涂料工业发展有限公司
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