Self-repairing anticorrosive outdoor building graphene coating and preparation method thereof

A graphene and self-repairing technology, which is applied in the direction of anti-corrosion coatings, microsphere preparation, microcapsule preparation, etc., can solve problems such as difficult to meet the needs of use, limited self-repair ability, poor anti-corrosion performance, etc., and achieve high self-repair efficiency, Improve anti-corrosion performance, improve the effect of anti-corrosion ability

Inactive Publication Date: 2018-11-30
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of existing outdoor architectural coatings, such as limited self-repair ability, poor repair efficiency, poor anti-corrosion performance, and difficulty in meeting the needs of use, the present invention proposes a self-repairing anti-corrosion outdoor architectural graphene coating and a preparation method, thereby improving the coating’s durability. Anti-corrosion performance, and has excellent self-healing ability

Method used

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  • Self-repairing anticorrosive outdoor building graphene coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Add isophorone diisocyanate into the reactor, heat to 53°C, add the catalyst dropwise under magnetic stirring, then slowly drop into the mixed aqueous solution of 1,4-butanediol and cyclohexanone, and raise the temperature to 63°C ℃ for 5.5 hours, cooled to 6 ℃ for 1.5 hours to obtain the BD-IPDI capsule core precursor material; in the capsule core precursor material reaction system, water, 1,4-butanediol, cyclohexanone, isophorone diisocyanate , The mass ratio of catalyst is 100:35:30:35:3; Catalyst is dibutyltin dilaurate;

[0031] (2) Add toluene diisocyanate into the reactor, heat to 41°C, add the catalyst dropwise under magnetic stirring, then slowly drop into the mixed solution of 1,4-butanediol and cyclohexanone, raise the temperature to 51°C and stir the reaction 4.5h, cool down to 6°C and refrigerate for 1.5h to obtain BD-TDI capsule wall precursor material; in the capsule wall precursor material reaction system, the mass ratio of water, 1,4-butanediol, cyc...

Embodiment 2

[0040] (1) Add isophorone diisocyanate into the reactor, heat to 50°C, add the catalyst dropwise under magnetic stirring, then slowly drop into the mixed aqueous solution of 1,4-butanediol and cyclohexanone, and raise the temperature to 60°C React at ℃ for 6 hours, cool down to 3℃ and refrigerate for 1 hour to obtain the BD-IPDI capsule core precursor material; in the capsule core precursor material reaction system, water, 1,4-butanediol, cyclohexanone, isophorone diisocyanate, catalyst The mass ratio is 100:30:25:30:2; the catalyst is dibutyltin dilaurate;

[0041] (2) Add toluene diisocyanate into the reactor, heat to 40°C, add the catalyst dropwise under magnetic stirring, then slowly drop into the mixed solution of 1,4-butanediol and cyclohexanone, raise the temperature to 50°C and stir the reaction After 4.5 hours, cool down to 3°C and refrigerate for 1 hour to obtain the BD-TDI capsule wall precursor material; in the capsule wall precursor material reaction system, the m...

Embodiment 3

[0048] (1) Add isophorone diisocyanate into the reactor, heat to 55°C, add the catalyst dropwise under magnetic stirring, then slowly drop into the mixed aqueous solution of 1,4-butanediol and cyclohexanone, and raise the temperature to 65°C React at ℃ for 5 hours, cool down to 8℃ and refrigerate for 2 hours to obtain the BD-IPDI capsule core precursor material; in the capsule core precursor material reaction system, water, 1,4-butanediol, cyclohexanone, isophorone diisocyanate, catalyst The mass ratio is 100: 40: 35: 40: 4; The catalyst is dibutyltin dilaurate;

[0049] (2) Add toluene diisocyanate into the reactor, heat to 45°C, add the catalyst dropwise under magnetic stirring, then slowly drop into the mixed solution of 1,4-butanediol and cyclohexanone, raise the temperature to 55°C and stir the reaction 5h, cool down to 8°C and refrigerate for 2h to obtain the BD-TDI capsule wall precursor material; in the capsule wall precursor material reaction system, the mass ratio of...

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Abstract

the invention provides a self-repairing anticorrosive outdoor building graphene coating and a preparation method thereof. The graphene coating is obtained by mixing self-repairing microcapsules, polytetrafluoroethylene resin, sodium dodecyl benzene sulfonate modified graphene dispersion liquid and additives, wherein the capsule core of the self-repairing microcapsule is a polyurethane prepolymer (IPDI) which is generated by 1,4-butanediol(BD) and isophorone diisocyanate and the capsule wall is made of polyurethane. The outdoor building graphene coating provided by the invention comprises the self-repairing microcapsule, so that the self-repairing performance and the repairing effect of the coating are remarkably improved, and the addition of the graphene improves the corrosion resistance of the coating and is combined with the self-repairing microcapsule, thus the comprehensive performance of the household paint is further remarkably improved, and the application prospect is excellent.

Description

technical field [0001] The invention relates to the technical field of architectural coatings, in particular to a self-repairing anti-corrosion outdoor architectural graphene coating and a preparation method thereof. Background technique [0002] The concept of self-healing materials was proposed by the US military in the 1980s, and soon became a research hotspot in various countries. Self-healing anti-corrosion coatings introduce self-healing functions into active anti-corrosion coatings to prepare a coating that can freely combine chemical anti-corrosion and physical passive anti-corrosion in the external environment. Microcapsule self-healing technology is to embed self-healing microcapsules in the matrix. After the substrate produces microcracks and damages, the microcapsules embedded in the substrate rupture, releasing the core material repair agent and reaction catalyst, and reacting Complete the micro-crack self-healing process. [0003] Core repair agents mainly in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D7/62C09D7/65C09D5/08B01J13/14
CPCC09D127/18B01J13/14C09D5/08C09D7/62C09D7/65C09D7/70C08L75/04C08K9/04C08K3/042
Inventor 陈庆
Owner CHENDU NEW KELI CHEM SCI CO LTD
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