Near-infrared reflective film, method for manufacturing near-infrared reflective film, and near-infrared reflector

一种制造方法、近红外的技术，应用在反射/信号涂料、化学仪器和方法、涂层等方向，能够解决粒度分布广、涂膜变色、雾度高等问题

Inactive Publication Date: 2013-03-27
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Furthermore, due to the use of a slurry formed by dispersing the rutile-type titanium oxide particles in an organic solvent using a surface treatment agent, there are problems in that the particle size distribution is wide and the refractive index in the coating film is uneven in the plane; The problem of discoloration of the coating film over time due to the influence of
[0009] In addition, the method described in Patent Document 3 has the following problems: Since the film is formed by bonding between particles, the film is brittle, and further, the high refractive index layer formed by bonding rutile-type titanium oxide particles has the following problems: In , the haze is high due to the voids generated at the particle interface

Method used

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  • Near-infrared reflective film, method for manufacturing near-infrared reflective film, and near-infrared reflector
  • Near-infrared reflective film, method for manufacturing near-infrared reflective film, and near-infrared reflector
  • Near-infrared reflective film, method for manufacturing near-infrared reflective film, and near-infrared reflector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0249] "Fabrication of near-infrared reflective film"

[0250] [Preparation of sample 1]

[0251] (high refractive index layer 1)

[0252] (Preparation of Coating Solution 1 for High Refractive Index Layer)

[0253] Coating liquid 1 for a high refractive index layer was prepared according to addition method A of the following addition sequence.

[0254] Dissolve 2.5 parts of tamarind gum as a thickening polysaccharide, 0.5 parts of polyvinyl alcohol (PVA203 manufactured by Kuraray Co., Ltd.), and 5.0 parts of LI-17 (aminocarboxylic acids) which is an exemplary compound of the compound A of the present invention. To the solution obtained in 340 parts of water, 5.0 parts of a 5.5 mass % aqueous solution of boric acid adjusted to pH 3.0 with nitric acid and 56 parts of a 20 mass % solution of the following rutile-type titanium oxide particle sol were added to prepare a coating for a high refractive index layer. cloth liquid 1.

[0255]

[0256] Under stirring, to the aqueou...

Embodiment 2

[0354] [Production of near-infrared reflector]

[0355] The near-infrared reflectors 1-18 were produced using the near-infrared reflective film of the samples 1-18 produced in Example 1. The near-infrared reflective films of samples 1-18 were respectively bonded to transparent acrylic resin plates with a thickness of 5 mm and 20 cm×20 cm with an acrylic adhesive to produce near-infrared reflectors 1-18.

[0356] [Evaluation]

[0357] The near-infrared reflectors 1 to 18 prepared above can be easily used despite the large size of the near-infrared reflectors, and excellent near-infrared reflectivity can be confirmed by using the near-infrared reflective film of the present invention.

Embodiment 3

[0359] "Fabrication of near-infrared reflective film"

[0360] [Preparation of sample 101]

[0361] (Preparation of High Refractive Index Layer Coating Liquid 101)

[0362] The following additives 1) to 6) were sequentially added and mixed to prepare a high refractive index layer coating liquid 101 .

[0363] First, the temperature was raised to 50° C. while stirring 1) the titanium oxide particle sol, and then 2) low-molecular-weight gelatin was added and stirred for 30 minutes to coat the surface of the titanium oxide particles with low-molecular-weight gelatin. Next, 3) polymer gelatin, 4) glycine, and 5) pure water were added and stirred for 90 minutes, and then 6) a surfactant was added to prepare a high refractive index layer coating liquid 101 .

[0364] 1) 20% by mass titanium oxide particle sol (volume average particle diameter 35nm, rutile type titanium oxide particles) 60g

[0365] 2) 5.0% by mass low molecular weight gelatin (Gel L1 ) aqueous solution 125g

[...

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Abstract

The present invention provides a near-infrared reflective film and a near-infrared reflector, which can be used over large areas and are flexible, and have low haze and high visible light transmittance. The near-infrared reflective film comprises at least one unit composed of a high refractive index layer and low refractive index layer on a substrate, and is characterized in that the refractive index difference between an adjacent high refractive index layer and low refractive index layer is at least 0.1, and said high refractive index layer contains at least one type of compound (A) selected from: 1) a rutile-type titanium oxide having a volume-average particle diameter of not more than 100 nm; 2) a water-soluble polymer; and 3) the following group of compounds. Group of compounds: a carboxyl group-containing compound, hydroxamic acids, pyridine derivatives

Description

technical field [0001] The present invention relates to a near-infrared reflective film excellent in near-infrared reflectivity, visible light transmittance and film flexibility, a manufacturing method thereof, and a near-infrared reflector provided with the near-infrared reflective film. Background technique [0002] In recent years, due to increased attention to energy-saving measures, from the viewpoint of reducing the load on air-conditioning equipment, there is a demand for near-infrared reflective films that are installed on window glass of buildings and vehicles to block the transmission of heat rays from sunlight. improve. [0003] As a method for forming a near-infrared reflective film, a method of forming a laminated film composed of alternately laminated high-refractive-index layers and low-refractive-index layers by dry film-forming methods such as vapor deposition and sputtering has been proposed. . However, in the dry film forming method, there are problems s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/28B32B7/02B32B27/18G02B5/08G02B5/26C09D7/61
CPCC09D7/1266G02B5/208C09D5/004B32B17/10201G02B5/282C08J7/04B32B17/10B32B17/10036B32B17/10761G02B1/10C09D7/1216C09D7/61C09D7/67B32B17/10005B32B2367/00
Inventor 当间恭雄荒井健夫中岛彰久久光聪史铃木伸一
Owner KONICA MINOLTA INC
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