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Optical film and process for producing optical film

A manufacturing method and optical film technology, applied to optical filters, coatings, vanadium oxide, etc., to achieve the effect of low haze and excellent storage stability

Inactive Publication Date: 2017-08-29
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, with VO 2 When the fine particles were formed into particles, filtered and dried, it was found that during the process, VO 2 The agglomeration of the primary particles of the fine particles is easy to produce blocky secondary particles

Method used

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  • Optical film and process for producing optical film
  • Optical film and process for producing optical film
  • Optical film and process for producing optical film

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Embodiment

[0229] Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these. In addition, the expression of "part" or "%" used in an Example means "part by mass" or "% by mass" unless otherwise specified.

[0230] "Optical film production"

[0231] "Optical film production"

[0232] [Production of Optical Film 101]

[0233] (Preparation of vanadium dioxide-containing microparticle dispersion 1: no particle drying process)

[0234] Ammonium vanadate (NH 4 VO 3 , Wako Pure Chemical Industries, Ltd., special grade) 0.433 g, and slowly dropwise added hydrazine hydrate (N 2 h 4 ·H 2 (0, Wako Pure Chemical Industries, Ltd., special grade) 5% by mass aqueous solution to prepare a solution 1 with a pH value of 9.2. The prepared solution 1 was placed in a commercially available autoclave for hydrothermal reaction treatment (Hu-25 type manufactured by Sanai Scientific Co., Ltd., made of Teflon (registered trademark) with...

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Abstract

The present invention addresses the problem of providing: an optical film which has such thermochromic properties that the degree of shielding near-infrared light can be controlled in accordance with the temperature environment, and which has a low haze and has excellent storage stability in high-humidity environments, and shows a large change with changing temperature in infrared light transmission effect and infrared light shielding effect; and a process for producing the optical film. This optical film comprises an optical functional layer comprising vanadium dioxide-containing fine particles and a hydrophobic binder resin, and is characterized in that all the vanadium dioxide-containing fine particles contained in the optical functional layer, including the primary particles and the secondary particles, have a number-average particle diameter of 200 nm or less.

Description

technical field [0001] The present invention relates to an optical film for near-infrared light shielding and a manufacturing method thereof. More specifically, it relates to an optical film having thermal discoloration, low haze, excellent storage stability in a high-humidity environment, and a large change rate of infrared transmission effect and infrared shielding effect when temperature changes, and a manufacturing method thereof . Background technique [0002] In recent years, in the market, in automobiles and buildings, etc., it is possible to shield the heat felt by human skin due to the influence of outdoor light (sunlight) entering through the window, thus having high heat insulation. Sexual or heat-shielding glass or a film bonded to glass. Recently, with the spread of electric vehicles and the like, the development of near-infrared light (heat ray) shielding films suitable for glass has been actively developed from the viewpoint of improving the efficiency of ai...

Claims

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Application Information

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IPC IPC(8): B32B7/02C08J5/18C08J7/04G02B5/20C01G31/02C08J7/043
CPCC01G31/02C08J5/18G02B5/20C08J7/043
Inventor 小山博和
Owner KONICA MINOLTA INC
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