Fluoro-carbon preservative weather-resistant coating and preparation method thereof

A technology of weather-resistant coatings and fluorocarbons, applied in anti-corrosion coatings, polyester coatings, coatings, etc., can solve the problems of inelasticity, difficulty in construction, unstable performance, etc., and achieve good anti-corrosion performance, easy construction, and good protection. Effect

Inactive Publication Date: 2018-10-02
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure fluorocarbon coating system has defects such as coating rigidity, lack of good elasticity, unstable performance, and difficult construction.
[0003] Graphene has high thermal stability and chemical stability, and can form a physical barrier layer between the metal surface and the active medium, thereby effectively blocking the passage of gas atoms such as water and oxygen. It is an ideal anti-corrosion coating Functional materials with high performance have good application prospects in anti-corrosion coatings. However, as a new type of carbon material, how to improve the compatibility of graphene and polymers, and develop graphene-polymer composites in metal anti-corrosion Applications still face many challenges

Method used

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  • Fluoro-carbon preservative weather-resistant coating and preparation method thereof
  • Fluoro-carbon preservative weather-resistant coating and preparation method thereof
  • Fluoro-carbon preservative weather-resistant coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Weigh each component (parts by weight) according to the following formula: 15 parts of PVDF fluorocarbon emulsion, 12 parts of fluorine-modified acrylic emulsion, 5 parts of polyhydroxystyrene emulsion, 5 parts of alkyd resin emulsion, and 10 parts of modified graphene oxide solution. 1.5 parts of curing agent, 25 parts of pigments and fillers, 8 parts of additives, 10 parts of organic solvents (6 parts of xylene, 4 parts of N-methylpyrrolidone), 2 parts of 95% ethanol, and 5 parts of deionized water.

[0025] Prepare fluorocarbon anti-corrosion and weather-resistant coatings as follows:

[0026] (1) Preparation of modified graphene oxide solution: add graphene oxide into deionized water, shake well, prepare 0.5 mg / mL graphene oxide aqueous solution, and ultrasonically disperse the 0.5 mg / mL graphene oxide aqueous solution 45min; Dissolve PEG with a molecular weight of 1000 in deionized water to prepare a 0.5mg / mL PEG aqueous solution; drop the PEG aqueous solution into...

Embodiment 2

[0032] This example is basically the same as Example 1, the difference being: 1. When preparing the modified graphene oxide solution, 0.5 mg / mLPEG (molecular weight is 1500) aqueous solution is dropped into the graphene oxide aqueous solution at a volume of 0.1:1 , to obtain a modified graphene oxide solution; 2. Weigh each component (parts by weight) according to the following formula: 55 parts of PVDF fluorocarbon emulsion, 10 parts of fluorine-modified acrylic emulsion, 10 parts of polyhydroxystyrene emulsion, alkyd resin emulsion 15 parts, 20 parts of modified graphene oxide solution, 3 parts of curing agent (Desmodur3390), pigment and filler (5 parts of isocyanate modified nano-silica, 5 parts of rutile titanium dioxide, 5 parts of barite powder, 10 parts of mica powder parts) 25 parts, additives 10 parts (wetting and dispersing agent sago-3550 1.5 parts / sago-3500 1.5 parts, anti-settling agent BYK-410 0.5 parts, leveling agent sago-3561 1 part, defoamer BYK-3455 1 part, ...

Embodiment 3

[0034] This example is basically the same as Example 1, except that when preparing a new type of fluorocarbon anti-corrosion and weather-resistant coating, the components (parts by weight) are weighed according to the following formula: 20 parts of PVDF fluorocarbon emulsion, fluorine-modified 8 parts of acrylic emulsion, 8 parts of polyhydroxystyrene emulsion, 8 parts of alkyd resin emulsion, 10 parts of modified graphene oxide solution, 1.5 parts of initiator, and 2 parts of curing agent.

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Abstract

The invention provides a fluoro-carbon preservative weather-resistant coating and a preparation method thereof. By means of researching of modification to a fluoro-carbon coating with a graphene oxidedispersant, penetration of water and gas atoms, such as oxygen and the like, is effectively inhibited, so that contact between the coating and corrosive or oxidizing mediums is prevented, thereby achieving excellent protective effect to the substrate material. In addition, the graphene also can passivate a coating metal in order to enhance anti-corrosion performance of the coating. The graphene can improve antifriction and wearing-resistance of the coating layer. Hydroxyl groups in polyhydroxystyrene emulsion and alkyd resin emulsion can be subjected to esterification and amination reactionswith residual carboxyl groups and amino groups remaining on surface of the graphene oxide, thus forming stable covalent bonds, increasing compatibility of the resin substrate and graphene oxide, and fully achieving the excellent anti-corrosion performance of the graphene. The coating has excellent anti-corrosion performance, good weather resistance, outstanding comprehensive performance and greatconstructability, and has excellent economic and social significances.

Description

technical field [0001] The invention relates to the fields of fluorocarbon coatings and anti-corrosion coatings, in particular to a fluorocarbon anti-corrosion and weather-resistant coating and a preparation method thereof. Background technique [0002] Anti-corrosion coatings have advantages that other materials cannot match, such as excellent performance, convenient manufacture, and low price, so they become the priority when choosing anti-corrosion measures. Due to the structural characteristics of F atoms, fluorocarbon resin has very superior performance in corrosion resistance, especially in outdoor corrosion protection, with a wide range of applications, excellent corrosion resistance, good weather resistance, good construction performance, and easy maintenance. At present, it is a variety of anti-corrosion coating resin matrix with good development prospects in the field of heavy-duty anti-corrosion. However, the pure fluorocarbon coating system has defects such as c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/16C09D133/00C09D167/08C09D7/62C09D5/08
CPCC08L2205/035C09D5/08C09D7/62C09D127/16C08L33/00C08L67/08C08K9/08C08K3/042
Inventor 叶秀芳陈东初余钢
Owner FOSHAN UNIVERSITY
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