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CN-122011909-A - High-transparency self-repairing nanometer gloss oil and preparation method thereof

CN122011909ACN 122011909 ACN122011909 ACN 122011909ACN-122011909-A

Abstract

The application relates to the technical field of coating compositions, in particular to high-transparency self-repairing nano gloss oil and a preparation method thereof, by mutually cooperating self-repairing microcapsules with intrinsic self-repairing, and the self-repairing capsule is filled with the repairing liquid containing the carbon quantum dots, thereby realizing triple self-repairing of microcapsule repairing, photo-thermal response repairing and intrinsic repairing, and having high repairing speed and high transparency.

Inventors

  • CHEN YUQING

Assignees

  • 成都银光科技有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. The high-transparency self-repairing nanometer gloss oil is characterized by comprising, by weight, 55-70 parts of polyether, 10-12 parts of disulfide bond-containing chain extender, 20-25 parts of diluent, 3-4 parts of photoinitiator, 4-8 parts of nanometer silica, 6-12 parts of self-repairing microcapsule and 0.3-0.8 part of auxiliary agent, wherein the self-repairing microcapsule is of a double-shell structure, a core material is repairing liquid containing carbon quantum dots, an inner shell is polyurea resin, and an outer shell is polymethyl methacrylate.
  2. 2. The high-transparency self-repairing nano-gloss oil according to claim 1, wherein the core material repairing liquid of the self-repairing microcapsule is a mixture of tung oil and carbon quantum dots, the mass of the carbon quantum dots accounts for 1-5% of the total mass of the repairing liquid, and the particle size of the carbon quantum dots is 2-10 nm.
  3. 3. The high-transparency self-repairing nano-gloss oil according to claim 1, wherein the particle size of the self-repairing microcapsule is 3-8 μm.
  4. 4. The high-transparency self-repairing nano varnish according to claim 1, wherein the thickness of the inner shell is 50-100 nm, and the thickness of the outer shell is 100-200 nm.
  5. 5. The high-transparency self-repairing nano varnish according to claim 1, wherein the polyether is polyethylene glycol diacrylate, polypropylene glycol diacrylate or polytetrahydrofuran ether diacrylate, and has a molecular weight of 1000-2000.
  6. 6. The high transparency self-healing nano-gloss oil according to claim 1, wherein the disulfide bond containing chain extender is a4, 4' -dithiodiphenylamine derivative.
  7. 7. The high-transparency self-repairing nano gloss oil according to claim 1, wherein the particle size of the nano silicon dioxide is 20-30 nm, and the surface is subjected to hydrophobic treatment by a silane coupling agent.
  8. 8. The high-transparency self-repairing nano-gloss oil according to claim 1, wherein the diluent is isobornyl acrylate ‌,1, 6-hexanediol diacrylate ‌ or tripropylene glycol diacrylate, and the photoinitiator is free radical type.
  9. 9. The preparation method of the high-transparency self-repairing nano gloss oil is characterized by comprising the following steps of: adding carbon quantum dots into tung oil to obtain repairing liquid, emulsifying the repairing liquid to form emulsion, forming a polyurea inner shell through interfacial polymerization, and coating a polymethyl methacrylate outer shell on the surface through emulsion polymerization; step two, mixing polyether, a chain extender containing disulfide bonds, a diluent and a photoinitiator, and adding nano silicon dioxide for dispersion; And thirdly, adding the self-repairing microcapsule with the double-shell structure, uniformly stirring, and filtering to obtain the self-repairing nanometer gloss oil.
  10. 10. The method for preparing the high-transparency self-repairing nano varnish according to claim 9, wherein in the second step and the third step, stirring speeds are 12000-16000 rpm and 500-700 rpm respectively.

Description

High-transparency self-repairing nanometer gloss oil and preparation method thereof Technical Field The application relates to the technical field of coating compositions, in particular to a high-transparency self-repairing nanometer gloss oil and a preparation method thereof. Background Self-healing coatings are capable of automatically restoring their integrity and appearance after mechanical damage. The existing self-repairing coatings are mainly divided into two types, namely microcapsule type and intrinsic type. The microcapsule type self-repairing coating realizes repairing by embedding microcapsules coated with the repairing agent in the coating, when the coating is scratched, the microcapsule breaks and releases the repairing agent to fill a damaged area (CN 118085711A), and the repairing speed of the coating is high, but the coating has two main defects that firstly, the transparency of the coating is easily reduced due to the difference of refractive indexes of the microcapsules and matrix resin, and secondly, the repairing agent cannot be continuously repaired after being exhausted, and the coating belongs to one-time repairing. Intrinsic self-healing coatings rely on reversible chemical bonds (e.g., disulfide bonds, diels-Alder bonds, etc.) in the polymer molecular chain to effect healing (CN 104312405B), but the healing rate is slow, often requiring heat or light triggering. In view of the above, how to provide a high-transparency self-repairing nano gloss oil for realizing the cooperation of rapid repairing and repeated repairing and a preparation method thereof. Disclosure of Invention The invention aims to provide high-transparency self-repairing nanometer gloss oil and a preparation method thereof, and the self-repairing microcapsule and the intrinsic self-repairing are mutually cooperated, and the repairing liquid containing carbon quantum dots is filled in the self-repairing microcapsule, so that triple self-repairing of microcapsule repairing, photo-thermal response repairing and intrinsic repairing is realized, the repairing speed is high, the transparency is high, and the problems of difficulty in single microcapsule and intrinsic repairing in the background technology are solved. In order to solve the technical problems, the invention adopts the following scheme: the high-transparency self-repairing nanometer gloss oil comprises, by weight, 55-70 parts of polyether, 10-12 parts of a chain extender containing disulfide bonds, 20-25 parts of a diluent, 3-4 parts of a photoinitiator, 4-8 parts of nanometer silicon dioxide, 6-12 parts of self-repairing microcapsules and 0.3-0.8 part of an auxiliary agent, wherein the self-repairing microcapsules are of a double-shell structure, a core material is repairing liquid containing carbon quantum dots, an inner shell is polyurea resin, and an outer shell is polymethyl methacrylate. The invention has the technical conception that 1) self-repairing microcapsules are added into raw material components for preparing nano gloss oil to form a first repairing after the nano gloss oil forms a coating, when the surface of the coating is subjected to external force to generate micron-sized scratches, the microcapsules are broken due to crack propagation, an inner polyurea shell is sensitive to stress to ensure timely breakage, an outer polymethyl methacrylate shell is broken along with the inner shell, core material tung oil (carbon-containing quantum dots) flows out rapidly under the action of capillary to fill a scratch area, the tung oil is contacted with oxygen in air to generate oxidation polymerization reaction, and a new film is formed by curing, wherein the process is carried out at room temperature without heating, and the scratch repairing can be completed within 2-5 minutes. The coating comprises polyether, a disulfide bond-containing chain extender and self-repairing microcapsules, wherein the polyether, the disulfide bond-containing chain extender and the self-repairing microcapsules are used as an organic resin matrix to form a main framework of a coating after nanometer gloss oil is solidified, a diluent is used for adjusting the viscosity of the system to participate in a crosslinking reaction, the diluent belongs to an active solvent, a photoinitiator belongs to a functional auxiliary agent to initiate a UV (ultraviolet) solidification reaction, a leveling agent and a defoaming agent are used as coating auxiliary agents, and nanometer silicon dioxide is used as a functional filler to improve the hardness and wear resistance of a subsequent coating. 2) And adding tung oil containing carbon quantum dots into the core material of the self-repairing microcapsule to form second repairing. The carbon quantum dots have excellent photo-thermal conversion performance, can convert light energy into heat energy, trigger microcapsule to controllably release and accelerate curing of the tung oil. For the self-repairing microcapsule which is not complet