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Light curing nano composite coating

A nano-composite and light-curing technology, applied in the direction of coating, etc., can solve the problems of low addition of inorganic nanoparticles, large specific surface area of ​​nanoparticles, and difficulty in uniform dispersion, etc., to achieve anti-ultraviolet and aging resistance, flexibility and transparency High, fast curing effect

Inactive Publication Date: 2009-05-06
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large specific surface area of ​​nanoparticles, they are easy to agglomerate, the amount of nanoparticles added by mechanical dispersion method is not high, the viscosity of the system is high, and the dispersion is not easy to be uniform; and the hardness of the coating is low, and the light transmittance is greatly lost.
In the Chinese patent "Preparation method of high scratch-resistant nano-composite polyurethane coating" with application number 02111699.7, nanoparticles are prepared by in-situ polymerization or blending, but the amount of inorganic nanoparticles added is not high, and the hardness of the coating lower

Method used

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  • Light curing nano composite coating
  • Light curing nano composite coating
  • Light curing nano composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0073] Inorganic nano-SiO 2 The particles were introduced into trimethylolpropane triacrylate by sol-gel method to obtain different contents of inorganic nano-SiO 2 granular masterbatch;

[0074] Inorganic nano-SiO obtained above 2 The particle masterbatch is mixed with prepolymer urethane acrylate and diluent trimethylolpropane triacrylate respectively to adjust the ratio; then add a certain amount of photoinitiator (1-hydroxycyclohexyl acetophenone), coating aid Agent (leveling agent fluorocarbon modified polyacrylate EFKA-3777, defoamer fluorocarbon modified polyacrylate EFKA-2722) adjustment.

[0075] At 25° C., magnetically stirred for 12 hours, mixed uniformly, and vacuum exhausted for 12 hours to prepare the light-curable nanocomposite coating of this example. Afterwards, the photocurable nanocomposite coating of this embodiment was used to form a film on polycarbonate by spin coating (rotating speed 2000-5000rpm), and the performance test was carried out; the test r...

Embodiment 5-8

[0081] Preparation of SiO with different contents by combining sol-gel method and mechanical blending 2 Nanocomposite acrylate masterbatch (nanoparticles include in-situ dispersion and mechanical dispersion).

[0082] The above SiO 2 Nanocomposite acrylate masterbatch is mixed with prepolymer (polyurethane acrylate), diluent (trimethylolpropane triacrylate or 1,6-hexanediol diacrylate), photoinitiator (1-hydroxycyclohexyl Acetophenone or benzil ketal) mixed according to a certain ratio; finally add a certain amount of coating additives (leveling agent: fluorocarbon modified polyacrylate EFKA-3777, defoamer: fluorocarbon modified polyacrylic acid ester EFKA-2722) and solvent (tetrahydrofuran or ethyl acetate).

[0083] At 25° C., magnetically stirred for 12 hours, mixed uniformly, and vacuum exhausted for 12 hours to prepare the light-curable nanocomposite coating of this example. Form a film on polycarbonate by spin coating (rotating speed 2000-5000rpm), and perform perform...

Embodiment 9-14

[0090] Combining the sol-gel method and the mechanical blending method, the inorganic nano-SiO 2 The particles were introduced into the acrylate by the sol-gel method; then the ZnO, TiO 2 , CaCO 3 or Al 2 o 3 Nanoparticles are dispersed in a mixture of 1,6-hexanediol diacrylate, tripropylene glycol diacrylate and trimethylolpropane triacrylate to prepare nanocomposite acrylate masterbatches (nanoparticles) with different contents Including in-situ dispersion and mechanical dispersion).

[0091] The above nanocomposite acrylate masterbatch, prepolymer (epoxy acrylate, polyether acrylate, polyurethane acrylate or a mixture of several prepolymers), diluent (1,6-hexanediol diacrylic acid ester, tripropylene glycol diacrylate, trimethylolpropane triacrylate or a mixture of several acrylates), initiators (benzil ketal, α, α-dimethyl-α-hydroxyphenyl ethyl Ketone, 1-hydroxycyclohexyl acetophenone or a mixture of several), coating additives (leveling agent: fluorocarbon modified p...

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Abstract

The invention relates to a photo-cured nanometer composite material which consists of 0 to 64 weight percent of film forming substance, 1 to 60 weight percent of inorganic nanometer particles, 1 to 56 weight percent of active thinner, 1 to 9.3 weight percent of evocating agent, 0 to 8 weight percent of coating additive and 0 to 31 weight percent of solvent. The manufacturing method comprises the following steps: (1) the prepared photo-cured nanometer composite material is counted by 100 weight percent; according to the proportion, each composition is weighed; (2) through a sol-gel method, a mechanical dispersion method or the combination of two methods, the inorganic nanometer particles are introduced to the active thinner to obtain a mixed master material; and (3) the mixed master material, an oligomer, the evocating agent, the coating additive and the solvent are mixed and evenly stirred to prepare the photocuring nanometer composite material. The photocuring nanometer composite material has the characteristics of high content of nanometer particles, good levelling performance, high transparency, good lustrousness, high adhesive force with a polymer substrate, high rigidity, scratching resistance, ultraviolet resistance and the like.

Description

technical field [0001] The invention relates to a coating, in particular to a scratch-resistant, transparent and ultraviolet-resistant photocurable nanocomposite coating. Background technique [0002] Clear, scratch-resistant coatings are versatile in everyday life. For example, in the automobile industry, transparent and scratch-resistant coatings can be used as a finish coating on the surface of automobiles to ensure that the paint film on the surface of the automobile is not easily scratched, so as to improve its life and aesthetics. Clear, scratch-resistant coatings can also be used on furniture, resin eyewear, and display surfaces to improve the wipe and scratch resistance of these surfaces. In addition, transparent polymer materials such as plexiglass often have poor UV resistance. Under long-term exposure to ultraviolet light, the material tends to turn yellow and become brittle. The coating modified with nanoparticles can significantly improve the UV resistance of ...

Claims

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Application Information

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IPC IPC(8): C09D4/06C09D5/00
Inventor 张辉张晖张忠
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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