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Substrate with hard coat film and coating solution for forming hard coat film

A technology of hard coating film and coating liquid, which can be used in devices for coating liquid on the surface, coatings, synthetic resin layered products, etc. Insufficient durability and weather resistance

Active Publication Date: 2009-04-01
JGC CATALYSTS & CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Titanium dioxide particles have a high refractive index, but their dispersion stability is not good, and depending on the usage, application, etc., there are problems in light resistance, weather resistance, etc. due to photocatalytic activity
Therefore, although the dispersion stability, weather resistance, weather resistance, etc. are improved by the composite of other components, such as silica components, etc., the composite components will cause a decrease in the refractive index, and it is difficult to completely suppress the photocatalytic activity. Therefore, light resistance, weather resistance, etc. may not be sufficient (see Patent Document 1: Japanese Patent Laid-Open No. 8-48940)
[0006] On the other hand, although zirconia particles have essentially no photocatalytic activity and have good properties such as light resistance and weather resistance, it is difficult to obtain a zirconia sol within the colloidal range with uniform particle size distribution and good stability.

Method used

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  • Substrate with hard coat film and coating solution for forming hard coat film
  • Substrate with hard coat film and coating solution for forming hard coat film
  • Substrate with hard coat film and coating solution for forming hard coat film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0285] Preparation of Modified Zirconia Microparticles (A-1) Dispersion

[0286] Preparation of zirconia sol (A-1)

[0287] Zirconium oxychloride octahydrate (ZrOCl 2 ·8H 2 (O) 35g was dissolved in 1302g of pure water, and 122.8g of aqueous KOH solution with a concentration of 10% by weight was added thereto to prepare zirconium hydroxide hydrogel (ZrO 2 Concentration 1% by weight). Thereafter, the zirconium hydroxide hydrogel was allowed to stand still for 5 hours, and 750 g of the supernatant (pH 11.0) was removed. Next, after adding 750 g of pure water and stirring, it left still again for 5 hours. Repeat the above operations until the conductivity of the supernatant reaches below 0.5 ms / cm.

[0288] 0.96 g of tartaric acid was added to the obtained zirconium hydroxide hydrogel and stirred well. Then, a KOH aqueous solution with a concentration of 10% by weight was added until the pH reached 11.0, ultrasonic treatment was performed for 1 hour to disperse the hydro...

Embodiment A2

[0306] Preparation of Modified Zirconia Microparticles (A-2) Dispersion

[0307] Antimony pentoxide coating

[0308] Mix zirconia sol (A-1) 240g and potassium antimonate aqueous solution (as Sb 2 o 5 concentration of 1% by weight) 60 g, the mixture was passed through an ion exchange tower filled with 330 g of cation exchange resin (manufactured by Mitsubishi Chemical Corporation: DAIAION PK-216H), and aged at 90° C. for 1 hour to prepare antimony pentoxide-coated Zirconia sol (A-2). The resulting sol had a pH of 2.5.

[0309] Silica coating

[0310] Except for using 277 g of prepared antimony pentoxide-coated zirconia sol (A-2), other operations were the same as in Example A1, and a solid content concentration of 10% by weight of antimony pentoxide / silica-coated zirconia was prepared. Microparticle Alcohol Dispersion (A-2).

[0311] surface treatment

[0312] Next, except that 119 g of antimony pentoxide / silica-coated zirconia fine particle alcohol dispersion (A...

Embodiment A3

[0315] Preparation of Modified Zirconia Microparticles (A-3) Dispersion

[0316] Antimony pentoxide coating

[0317] Mix zirconia sol (A-1) 150g and potassium antimonate aqueous solution (as Sb 2 o 5 concentration of 1% by weight) 150 g, the mixture was passed through an ion exchange tower filled with 330 g of a cation exchange resin (manufactured by Mitsubishi Chemical Corporation: DAIAION PK-216H), and aged at 90° C. for 1 hour to prepare antimony pentoxide-coated Zirconia sol (A-3). The resulting sol had a pH of 2.7.

[0318] Silica coating

[0319] Except for using 277 g of antimony pentoxide-coated zirconia sol (A-3), other operations were the same as in Example A1, and an alcohol dispersion of antimony pentoxide / silica-coated zirconia fine particles with a solid content concentration of 10% by weight was prepared. solution (A-3).

[0320] surface treatment

[0321] Next, except that 119 g of antimony pentoxide / silica-coated zirconia fine particle alcohol d...

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Abstract

The invention relates to modified zirconia fine particles, substrate with hard coat film and coating solution for forming hard coat film. The modified zirconia fine particles are zirconia fine particles having their surfaces coated with antimony pentoxide and / or silica, and having their surface potentials in a range of -120 to -10 mV, as measured by the following conditions: condition (1): a solid content concentration of 1% by weight in a dispersion solution of the modified zirconia fine particles; and conditions (2): a pH in a range of 2 to 13 in a dispersion solution of the modified zirconia fine particles.

Description

technical field [0001] The present invention relates to zirconia fine particles having excellent dispersibility and stability in a wide pH range of a dispersion liquid due to the surface being covered with antimony pentoxide or silicon dioxide, the fine particle dispersion sol, and a method for producing the same. In addition, the present invention relates to a substrate having a hard coating film having good adhesion to the substrate, scratch resistance, scratch strength, pencil hardness, etc., and a coating liquid for forming the hard coating film. The base material of the hard coat film is composed of the base material and the hard coat film formed on the base material, the refractive index can be easily adjusted to a predetermined range, and at the same time, it contains complex oxide particles with good dispersibility and stability, so it can be used The refractive index of the base material and the transparent film are almost the same, so interference fringes do not occu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12B01J13/00C09D183/04G02B1/10B05D5/00B05D7/24B32B27/20C09D5/00C09D201/00G02B1/111G02B1/14G02B1/16
Inventor 村口良熊泽光章二神涉俵迫祐二松田政幸平井俊晴
Owner JGC CATALYSTS & CHEM LTD
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