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
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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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