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Ultraviolet-shielding transparent resin molding and manufacturing method of the same

A technology of transparent resin and manufacturing method, applied in the direction of nanotechnology, zinc oxide/zinc hydroxide, fibrous filler, etc. for material and surface science, which can solve the problem that the ultraviolet shielding ability of ultra-fine zinc oxide particles is reduced and cannot be completely removed. Impurities, etc.

Inactive Publication Date: 2009-11-04
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] In addition, the method for producing zinc oxide particles given in Patent Document 5 has the following problem: the trace impurities in the zinc oxide particles cannot be completely removed, and these trace impurities remain in the generated ultrafine zinc oxide, causing the ultrafine The ultraviolet shielding ability of zinc oxide particles is reduced

Method used

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  • Ultraviolet-shielding transparent resin molding and manufacturing method of the same
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  • Ultraviolet-shielding transparent resin molding and manufacturing method of the same

Examples

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preparation example Construction

[0083] According to the preparation method of the zinc oxide microparticles used in the present invention, by dropping the solution of the zinc compound into the alkali solution, the zinc compound solution can instantly reach supersaturation and form a precipitate, so that uniform microparticles with uniform particle size can be obtained. Zinc oxide particles. Furthermore, decantation was performed using pure water to wash the generated precipitate. Repeat the decanting operation until the conductivity of the cleaning solution after cleaning reaches 1 mS / cm or less, so that impurities are sufficiently removed, thereby avoiding the ultraviolet shielding properties of the ultraviolet shielding transparent resin molded body of the present invention in which the zinc oxide particles are dispersed. reduce. Thereby, it is possible to provide a transparent resin molded article that shields ultraviolet rays and exhibits not only transparency but also excellent ultraviolet shielding p...

Embodiment 1

[0138] 1100 g of an aqueous solution containing 86.9 g of ammonium bicarbonate (special grade) was prepared.

[0139] This ammonium bicarbonate aqueous solution was stirred at 25°C, and 946.1 g of an aqueous solution containing 148.4 g of zinc nitrate hexahydrate (special grade) was added dropwise thereto over 6 minutes to form a precipitate. After the above-mentioned dropwise addition was completed, the stirring was continued for another 10 minutes to ripen the precipitate. The final pH at this point was 7.5.

[0140] Next, the precipitate was repeatedly washed by decantation using pure water until the conductivity of the washing liquid after washing became 1 mS / cm or less.

[0141] The washed precipitate was dried at 105°C to obtain a dry powder. Containing 8.2g colloidal silicon dioxide (SiO 2 Content 20% by weight) modified alcohol (Nippon Alcohol Sales (Nippon Alcoll Sales) Co., Ltd., SOLMIX (Solmix) AP-2 (trade name): hereinafter sometimes abbreviated as "AP-2") solut...

Embodiment 2

[0146] Zinc oxide fine particles b were obtained in the same manner as in Example 1 except that the amount of ammonium bicarbonate was 79 g and colloidal silica was not added when producing zinc oxide fine particles.

[0147] The specific surface area of ​​zinc oxide particle b is 36.4m 2 / g, the average particle diameter is 28.4nm, the half width of the X-ray diffraction (101) peak is 0.38, and the crystallite particle diameter is 19.3nm.

[0148] A transparent resin molded body B that blocks ultraviolet rays was obtained in the same manner as in Example 1 except that zinc oxide fine particles b were used instead of zinc oxide fine particles a. Table 1 shows the optical properties of the ultraviolet-blocking transparent resin molded body B.

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Abstract

The present invention provides an ultraviolet light shielding transparent resin molding using an inorganic ultraviolet light absorber and a manufacturing method of the same, having sufficient shielding characteristics of ultraviolet light having a wavelength of 375nm close to a visible light, and capable of exhibiting both high ultraviolet light shielding and a low haze value. There is provided the ultraviolet light shielding transparent resin molding and the manufacturing method of the same, with zinc oxide fine particles dispersed in a transparent resin, each specific surface area set at 25m<2> / g or more and 55m<2> / g or less, average particle size set at 19nm or more and 41 nm or less, half value width of a (101) peak in an X-ray diffraction measurement set at 0.5 or less, and crystallite diameter set at 15nm or more and 20nm or less.

Description

technical field [0001] The present invention relates to an ultraviolet-shielding transparent resin molded article obtained by dispersing zinc oxide fine particles having excellent ultraviolet-shielding properties in a transparent resin, and a method for producing the same. Background technique [0002] Transparent resin moldings such as acrylic resins, polycarbonate resins, and polyester resins are widely used as building materials for outdoor use such as skylights, carports, and roofing materials for domes due to their transparency and aesthetic appearance. However, when ultraviolet rays contained in sunlight pass through building materials made of the above-mentioned transparent resins, problems such as deterioration, discoloration, and deterioration of items placed in rooms or vehicles may occur. [0003] In addition, since the above-mentioned transparent resin molded article itself also tends to absorb ultraviolet rays, if it is exposed to ultraviolet rays for a long per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K3/22C08K9/04C01G9/02C08L33/00C08L69/00C08L27/06C08L25/06C08L67/00C08L81/06C08L23/00
CPCC01P2006/12C01P2002/84C09C1/043C01P2004/64C01P2002/74C09C1/0081C01G9/02B82Y30/00Y10T428/256
Inventor 长南武小林宏
Owner SUMITOMO METAL MINING CO LTD
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