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A kind of fluorine-containing polymer powder coating and its preparation method and use

A powder coating and polymer technology, applied in powder coatings, coatings, etc., can solve the problems of difficult to uniformly disperse additives and reduce coating performance, and achieve the effects of improving dispersibility, low cost and environmental protection in the process

Active Publication Date: 2021-04-23
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used additives are generally hard materials, such as metals, carbon materials, etc. It is difficult for these materials to form a good interface performance with the resin, so it is difficult for the additives to disperse evenly in the resin, which reduces the performance of the coating.

Method used

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  • A kind of fluorine-containing polymer powder coating and its preparation method and use

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of fluorine-containing polymer powder coating, comprises the following steps:

[0028] (1) Carry out polydopamine coating modification to zinc oxide, the mass ratio of zinc oxide and polydopamine is 1:0.01, obtains polydopamine coating modified zinc oxide powder, standby;

[0029] (2) Put the dopamine monomer and the dopamine monomer into the tris buffer solution with a concentration of 0.5g / L for oxidative self-polymerization, and the mass ratio of the dopamine monomer and the dopamine monomer is 1:9 , the concentration of dopa monomer in buffer solution is 0.05g / L, obtain polydopa-dopamine complex, standby;

[0030] (3) Adopting mechanical blending device, the polydopamine-dopamine complex obtained by the ETFE powder with an average particle diameter of 100 μm, the polydopamine modification obtained in step (1) and the polydopamine-dopamine complex obtained in step (2) Mix at 1:0.01:0.01 to obtain fluoropolymer powder coating products.

Embodiment 2

[0032] The preparation method of fluorine-containing polymer powder coating, comprises the following steps:

[0033] (1) Carry out polydopamine coating modification to carbon fiber, the mass ratio of carbon fiber and polydopamine is 1:0.3, the obtained polydopamine modified carbon fiber, standby;

[0034] (2) putting the dopamine monomer and the dopamine monomer into the tris buffer solution with a concentration of 3g / L to carry out oxidative self-polymerization, the mass ratio of the dopamine monomer and the dopamine monomer is 7:3, The concentration of dopa monomer in buffer solution is 0.35g / L, obtain polydopa-dopamine complex, standby;

[0035] (3) adopting mechanical blending device, the polydopamine-dopamine complex obtained by the polydopamine modified carbon fiber obtained by the ETFE powder of 200 μm, step (1) and step (2) by average particle diameter is 1 in mass ratio: 0.4:0.1 for mixing to obtain fluoropolymer powder coating products.

Embodiment 3

[0037] The preparation method of fluorine-containing polymer powder coating, comprises the following steps:

[0038] (1) Carry out polydopamine coating modification to carbon black, the mass ratio of carbon black and polydopamine is 1:1, obtains polydopamine modified carbon black, standby;

[0039] (2) putting the dopamine monomer and the dopamine monomer into the tris buffer solution with a concentration of 5g / L to carry out oxidative self-polymerization, the mass ratio of the dopamine monomer and the dopamine monomer is 9:1, The concentration of dopa monomer in the buffer solution is 0.45g / L, and the polydopa-dopamine complex is obtained for subsequent use;

[0040] (3) Adopting mechanical blending device, the polydopamine-dopamine complex obtained by the polydopamine-modified carbon black that the average particle diameter is 300 μ m, the polydopamine modified carbon black that step (1) obtains and step (2) is 1 by mass ratio :0.7:0.2 for mixing to obtain fluoropolymer pow...

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Abstract

The invention relates to a fluorine-containing polymer powder coating. The fluorine-containing polymer powder coating comprises a fluorine-containing polymer with a mass ratio of 1:0.01-0.7:0.01-0.2, and a polydopamine coating-modified hard additive and the polydopa-dopamine complex. The coating is mainly used as a primer for metal substrates, and the obtained primer coating has good adhesion properties.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer powder coatings, and in particular relates to a fluorine-containing polymer powder coating and its preparation method and application. Background technique [0002] At present, commonly used fluoropolymers are thermoplastic resins polymerized from fluorine-containing monomers. They have excellent self-flame retardancy, self-cleaning, corrosion resistance, and high and low temperature resistance. They are widely used in aviation, automobiles, petroleum and chemical industries. and other fields have been widely used. Among them, ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF) and hexafluoropropylene-tetrafluoroethylene copolymer (FEP) have aging resistance, solvent resistance, non-stickiness and good processing performance, etc. It is a good coating material. [0003] However, as a coating material with excellent comprehensive properties, a good interfacial ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D123/08C09D127/16C09D127/20C09D7/62C09D7/65C09D5/03
CPCC08K2003/2241C08K2003/2296C09D5/033C09D123/0892C09D127/16C09D127/20C09D7/62C09D7/65C09D7/70C08L79/04C08K9/10C08K3/22C08K7/06C08K3/04C08K3/36
Inventor 孙洪阳邵春明张广欣陈振华贾冰
Owner JUHUA GROUP TECH CENT