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Solar reflectance

A technology of sunlight and system, applied in the direction of reflective/signal paint, coating, special surface, etc., can solve the problem of inability to design the solar reflectance of the primer layer and the decrease of the solar reflectance

Active Publication Date: 2016-05-18
TIOXIDE EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although each provides solar reflectance, some disadvantages in using these currently available systems include: they provide a relatively pale color because high levels of conventional titanium dioxide are required in order to provide the desired level of solar reflectance; Contains impurities that can cause absorption in the near-infrared portion of the spectrum, resulting in reduced solar reflectance; and primer layers cannot be designed to provide maximum solar reflectance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0082] Example 1A. A white 30% titanium dioxide volume concentration primer paint was made and applied to a substrate.

[0083] A clear resin solution was prepared using acrylic resin, crosslinker and solvent. The amounts of the various components are listed in Table 1 below.

[0084] clear resin solution

weight%

60% acrylic resin (40% solvent)

68

solvent

9

crosslinking agent

23

[0085] Table 1: Composition of clear resin solutions

[0086] 19.57g of 0.7 micron particle size titanium dioxide was added to 7.5g of the clear resin solution to create a millbase, which was then mixed vigorously for 30 seconds. The tinted millbase was then diluted with an additional 15 g of clear resin. The millbase was then milled for an additional 2 minutes to provide a white basecoat. The primer was applied to hot dip galvanized (HDG) steel panels using a 3 wire coil applicator to provide a primer dry film thickness of about 9.8 microns. ...

Embodiment 1B

[0087] Example 1B. Manufacture and application of colored paint to HDG steel panels and primer coats.

[0088] With respect to various specified pigments (PY180ClariantFastYellowHG, PR122HPCPR1220, PV23CibaCromophtalVioletGt, PBlack32BASFPaliogenBlackL0086, PO71CibaIrgazinDPPCosmoray, PY128Ciba8GNP), toner concentrates were prepared using acrylic resins, wetting and dispersing additives, solvents, and specific toners. The amounts of the various components are shown in Table 2. Then, the toner concentrate is ground with steel balls.

[0089]

[0090]Table 2: Composition of Toner Concentrates

[0091] It should be understood that ral is a standard color and that the ral system is a standard color system. For ral3003 and ral8004, colored solutions were prepared by extracting the amounts of each desired toner concentrate shown in Table 3 and mixing vigorously with the specified amount of additional acrylic for 2 minutes.

[0092]

ral 3003

ral 8004

Ton...

Embodiment 1

[0098] Example 1C. The results in Example 1B were compared with data collected from publicly available TSR values ​​for standard pigmented 2-layer systems and are shown in Table 5.

[0099]

[0100] Table 5: TSR values ​​of conventional 2-layer systems compared to systems of the invention.

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Abstract

The present invention provides a layered colored solar reflective system comprising (i) a first layer comprising, dispersed in a vehicle, a rutile crystal morphology and an average particle size of from about 0.55 μm to about 0.95 μm A first particulate material and (ii) a second layer located on at least a portion of said first layer, said second layer comprising dispersed in a vehicle having a substantially rutile crystal morphology and an average particle size of about 1.0 μm to 1.6 μm The second particulate material and colorant. The layered colored solar reflective system can be applied to structures to provide dark, intense color, and increased total solar reflectance.

Description

field of invention [0001] The present invention relates generally to colored solar reflective systems that provide high solar reflectance and various uses of such colored systems. Background of the invention [0002] New technologies are continuously being developed to increase energy efficiency. One such technique is the use of infrared reflective pigments in coatings on the exterior of buildings (or other objects). As far as people are concerned, the sun emits about 50% of its energy as near infrared radiation. When this near-infrared radiation is absorbed, it is physically converted to heat. Coatings containing infrared reflective pigments work by reflecting sunlight away and by blocking the transfer of heat, thereby reducing the building's thermal load. For example, white pigments such as titanium dioxide have been used in coatings to reflect most of the solar energy. Often, for aesthetic reasons it is desirable to provide a colored coating instead of white. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/00C09D7/41C09D7/61
CPCB05D5/063B05D7/52B05D7/57C08K3/22C09D7/61C09D7/68C09D7/69C09D5/004Y10T428/1352Y10T428/1393Y10T428/2927Y10T428/256Y10T428/131C09D7/41B32B27/20B32B2307/416C09D5/00B05D5/06
Inventor J·L·爱德华兹K·劳里E·R·帕恩哈姆J·罗布
Owner TIOXIDE EURO