Latent self-repair microcapsule and preparation method thereof

A technology of self-healing microcapsules and latent type, which is applied in the direction of microcapsule preparation, microsphere preparation, coating, etc., can solve the problems of small contact probability and long storage period of microcapsules, so as to overcome poor fluidity, save manpower and financial resources, The effect of easily controllable conditions

Active Publication Date: 2012-07-25
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
View PDF6 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to overcome the shortcoming that prior art exists, seek design and propose a kind of latent self-repairing microcapsule and preparation method for organic coating, the latent self-repairing microcapsule that it prepares uses heating in repairing process The curing method repairs cra

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In this embodiment, first add urea and 37% formaldehyde solution to a four-necked flask and mix with a molar ratio of 1:1.0-3.0; adjust the pH to within the range of 7.5-11.8 with triethanolamine or sodium hydroxide, and slowly raise the temperature to 60 React at -85℃ for 3 hours to generate viscous transparent water-soluble urea-formaldehyde prepolymer solution; take epoxy resin, capsule core diluent, capsule core latent curing modifier and mix thoroughly according to the ratio of 1:0.5:0.25, and add 40-110ml Distilled water, stir and mix; add emulsifier according to the proportion of 0.5%-2.5%, control the high-speed emulsifier to emulsify at a speed of 10000-30000r / min for 10-20 minutes to form an O / W type emulsion; combine the urea-formaldehyde resin prepolymerized liquid with emulsification Mix the liquid, stir thoroughly to disperse the prepolymerized liquid in the aqueous medium, add dilute hydrochloric acid and sodium hydroxide dropwise to adjust the pH to the ra...

Embodiment 2

[0016] In this example, first add urea and 37% formaldehyde solution to a four-necked flask and mix with a molar ratio of 1:1.0-3.0. Adjust the pH to within the range of 7.5-11.8 with triethanolamine or sodium hydroxide, and slowly raise the temperature to 60 React at -85℃ for 3 hours to generate viscous transparent water-soluble urea-formaldehyde prepolymer solution; take epoxy resin, capsule core diluent, capsule core latent curing modifier and mix thoroughly according to the ratio of 1:0.5:0.4, and add 40-110ml Distilled water, stir and mix; add emulsifier according to the proportion of 0.5%-2.5%; control the high-speed emulsifier to emulsify at a speed of 10000-30000r / min for 10-20 minutes to form an O / W type emulsion; combine the urea-formaldehyde resin prepolymerization solution and emulsification Mix the liquid, stir thoroughly to disperse the prepolymerized liquid in the aqueous medium, add dilute hydrochloric acid and sodium hydroxide dropwise to adjust the pH to the ra...

Embodiment 3

[0018] In this example, first add urea and 37% formaldehyde solution to a four-necked flask and mix with a molar ratio of 1:1.0-3.0. Adjust the pH to within the range of 7.5-11.8 with triethanolamine or sodium hydroxide, and slowly raise the temperature to 60 React at -85℃ for 3 hours to generate viscous transparent water-soluble urea-formaldehyde prepolymer solution; take epoxy resin, capsule core diluent, capsule core latent curing modifier and mix thoroughly according to the ratio of 1:0.5:0.6, and add 40-110ml Distilled water, stir and mix; add emulsifier according to the proportion of 0.5%-2.5%; control the high-speed emulsifier to emulsify at a speed of 10000-15000r / min for 10-20 minutes to form an O / W emulsion; combine the urea-formaldehyde resin prepolymerization solution with Mix the emulsified liquid, stir well to disperse the pre-polymerization liquid in the water medium, add dilute hydrochloric acid and sodium hydroxide dropwise to adjust the pH to the range of 1.0-5...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of preparation of a microcapsule, and relates to a latent self-repair microcapsule for an organic coating and a preparation method of the latent self-repair microcapsule. The method comprises the steps of feeding urea and formaldehyde mixed solution into a four-mouth flask, adjusting the pH value to 7.5-11.8 with triethanolamine, and ensuring that the temperature is slowly increased for reaction for 3 hours, so as to produce viscous transparent water-soluble urea-formaldehyde prepolymer solution; sufficiently mixing a capsule-core epoxy resin, a capsule-core diluting agent, and a capsule-core latent curing modifier proportionally, adding distilled water, stirring, adding an emulsifying agent, emulsifying for 10-20min in a high-speed emulsifyingmachine, so as to form O/W type emulsion, mixing the urea-formaldehyde prepolymer solution and the emulsified liquid and sufficiently stirring to disperse in an aqueous medium, adjusting the pH valueto 1.0 to 5.0, centrifugating the particle suspension after curing at a controlled temperature for 3 hours, performing flushing for a plurality of times, and then performing vacuum drying to obtain the microcapsule. The method has the advantages that the technology is simple, the condition is easy to control, the preparation cost is low, the product quality is good, the repair effect is good, themanpower and cost are saved, and the method is environment-friendly.

Description

Technical field [0001] The invention belongs to the technical field of microcapsule preparation, and relates to a latent self-repairing microcapsule used for organic coating and a preparation method thereof, in particular to a latent repairing agent type composite microcapsule and a preparation method thereof. Background technique: [0002] At present, traditional crack repair techniques mainly include welding, repair, and in-situ curing of new resins. Most of these traditional methods use intermolecular interactions to repair some thermoplastic resins. The repair mechanism is non-covalent bond interactions between interface molecules. There is no new covalent bond formation, and a lot of manual labor is required; the self-repairing microcapsule technology used for coating crack repair has the characteristics of self-diagnosis and self-repair, which makes up for the loopholes in manual detection of coating defects and reduces labor workload . At present, dicyclopentadiene is use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09D7/12B01J13/18C08G12/12
Inventor 王巍许立坤李相波
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap