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Preparation method of electroactive benzoxazine-polyaniline intrinsic hybrid oligomer coating

A benzoxazine and electroactive technology, applied in coatings, organic chemistry, anti-corrosion coatings, etc., can solve problems such as process flow design, achieve good application prospects, good processing performance, and solve the effects of poor processing performance

Active Publication Date: 2019-02-22
SHAANXI TIANCE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there are no products that meet the above requirements on the market, and no corresponding process design has been carried out for them. Therefore, developing corresponding products and exploring the best preparation method will greatly improve the anti-corrosion effect of metal materials. the meaning of

Method used

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  • Preparation method of electroactive benzoxazine-polyaniline intrinsic hybrid oligomer coating
  • Preparation method of electroactive benzoxazine-polyaniline intrinsic hybrid oligomer coating
  • Preparation method of electroactive benzoxazine-polyaniline intrinsic hybrid oligomer coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Weigh 550 parts by weight of structure-type electroactive benzoxazine monomer, 110 parts by weight of p-phenylenediamine and 1000 parts by weight of N-methylpyrrolidone into the reaction kettle, feed nitrogen, and mechanically stir at 300 rpm, Control the system temperature to 30°C. Weigh 6 parts of ammonium persulfate and potassium persulfate mixed catalyst (the weight ratio of ammonium persulfate and potassium persulfate is 1:9). The mixed catalyst was added to 10 parts of hydrochloric acid-water solution with a concentration of 0.8 mol / liter. After the catalyst was completely dissolved, the catalyst solution was added dropwise to the dispersion in the reactor within 1 hour. After the catalyst solution was added dropwise, the reaction temperature was kept constant at 30° C., and the reaction was continuously stirred for 10 hours, and then filtered to obtain a gray-black powder. The gray-black powder was washed three times with water, acetone and absolute ethanol, and...

Embodiment 2

[0066] Weigh 590 parts by weight of structure type II electroactive benzoxazine monomer, 190 parts by weight of biphenyldiamine and 1200 parts by weight of N-N-dimethylformamide and add them to the reaction kettle, feed nitrogen, and mechanically Stir and control the system temperature to 40°C. Weigh 40 parts of ammonium persulfate catalyst. The mixed catalyst was added to 60 parts of hydrochloric acid-water solution with a concentration of 0.5 mol / liter. After the catalyst was completely dissolved, the catalyst solution was added dropwise to the dispersion in the reactor within 2 hours. After the catalyst solution was added dropwise, the reaction temperature was kept constant at 40° C., the reaction was continued to stir for 6 hours, and filtered to obtain a gray-black powder. The gray-black powder was washed 6 times with water, acetone and absolute ethanol, and dried in vacuum at 100°C for 12 hours to obtain black electroactive benzoxazine-polyaniline intrinsic hybrid oligo...

Embodiment 3

[0070] Weigh 610 parts by weight of structure III type electroactive benzoxazine monomer, 160 parts by weight of benzidine diamine and 1400 parts by weight of dimethyl sulfoxide into the reaction kettle, feed nitrogen, and mechanically stir at 600 rpm, Control the system temperature to 20°C. Weigh 20 parts of ammonium persulfate and sodium persulfate mixed catalyst (the weight ratio of ammonium persulfate and sodium persulfate is 5:5). The mixed catalyst was added to 40 parts of hydrochloric acid-water solution with a concentration of 0.8 mol / liter. After the catalyst was completely solvent, the catalyst solution was added dropwise to the dispersion in the reactor for 1.5 hours. After the catalyst solution was added dropwise, the reaction temperature was kept constant at 20° C., the reaction was continuously stirred for 12 hours, and the reaction was filtered to obtain a gray-black powder. The gray-black powder was washed 4 times with water, acetone and absolute ethanol in se...

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Abstract

The invention discloses a preparation method of an electroactive benzoxazine-polyaniline intrinsic hybrid oligomer coating. The coating is prepared by the following steps: (1) dispersing 5 to 50 parts by weight of electroactive benzoxazine- polyaniline intrinsic hybrid oligomer and 50 to 95 parts by weight of benzoxazine monomer into 80 to 120 parts by weight of organic solvent to obtain a coating precursor premix; (2) uniformly coating the surface of a carbon steel, purple steel or aluminum alloy workpiece with the premix, performing heat treatment for 0.5 to 1.5 hours under the condition of 180 DEG C to 200 DEG C, and naturally cooling to obtain a uniform translucent coating with a thickness of 5 to 200 microns. By molecular design, a polar electroactive benzoxazine structure is introduced into a main chain of a polyaniline molecule to obtain an electroactive functional oligomer with good processing performance. The oligomer has flexible molecular design performance, good thermal stability, excellent mechanical properties and good processing performance. The provided coating has excellent adhesion strength, high glass transition temperature and good chemical corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of organic polymer materials, in particular to an electroactive benzoxazine-polyaniline hybrid oligomer, a coating made using it and a preparation method. Background technique [0002] At present, in the industrial field, the corrosion of metal materials is a worldwide problem, often causing serious economic losses and causing safety problems. The method to deal with this problem is mainly to use anti-corrosion coating for metal corrosion protection. The method of coating anti-corrosion has the advantages of simple operation, economical and practical, wide application range and decorative function. [0003] At present, the coatings used on the market are mainly conductive polymer materials polypyrrole (PPy), polyaniline (PANI) and polythiophene (PTH) and their derivative coatings, which are an important class of metal anti-corrosion coatings (Hou Jian , Guo Weimin, Wang Juntao, "A Preparation Method of Hete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/04C09D5/08C08G73/06C07D498/04C07D265/16C07D413/14
CPCC07D265/16C07D413/14C07D498/04C08G73/06C09D5/08C09D5/18C09D179/04
Inventor 赵春霞李姝靓李云涛李辉邢云亮
Owner SHAANXI TIANCE NEW MATERIAL TECH
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