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Introduction of CIR series- Near infra-red(IR)/heat absorption dye & pigment
Contents
1. Comparison of the CIR series
2. Transmittance/Absorption spectrum
3. Heat resistance
4. Humidity resistance
5. Light stability
6. Solubility to typical solvents
7. Examples of application of the CIR dye/pigment
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Structure of the CIR dye
✔ High near IR radiation (780nm~1500nm) absorption ability
✔ High transmittance for visible light
✔ Solubility and durability can be adjusted by choice of “R” and “X”.
1. Comparison of the CIR series
Product type
Form Characteristics use with
CIR-RL dye durable thermo-plastic binders
CIR-FS265 pigment blue - shifted UV hard coatings, adhesives
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2. Transmittance/Absorption Spectrum - Film
<Test film structure>
Dye/PMMA (6～8μm)
PET (50μm)
400 600 800 1000 1200 1400
0
20
40
60
80
100
Tra
nsm
itta
nce /
%
Waveength / nm
CIR-RL CIR-FS265
wavelength/nm
transm
itta
nce/%
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2. Absorption Spectrum - Mass Absorption Coefficient
Product type
λmax/nmmass absorption
coefficient/L(g・cm)-1 solvent
CIR-RL 1070 ~ 1090 ≧ 66.2 acetone
CIR-FS265 1055 ~ 1075 ≧ 51.0 acetone
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3. Heat Resistance (CIR-RL)
b* indicates color change over time.
The larger the b* is, the more yellowish films are.
Fig. Heat Resistance b* (105℃, Dry)Fig. Heat Resistance NIRA (105℃, Dry)
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4. Humidity Resistance (CIR-RL)
b* indicates color change over time.
The larger the b* is, the more yellowish films are.
Fig. Humidity Resistance NIRA (85℃, 85%RH) Fig. Humidity Resistance b* (85℃, 85%RH)
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5. Light stability (CIR-RL)
Fig. Light stability under 105℃, dry Fig. Light stability under 85℃, 85%RH
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5. Light stability (test condition)
0
10
20
30
40
50
60
70
80
90
100
200 400 600 800 1000 1200
波長（nm)
透過率（
%）
初期
24h
72h
120h
Irradiation conditionIrradiation intensity: 320W/m2(Xe lamp), Black panel temperature: 63℃
Test film compositionacryl type binder＋UV absorbance agentCIR-RL content is 14wt％ to the binder
Wavelength/nm
Tra
nsm
itta
nce/%
ini.
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6. Solubility of CIR to typical solvent
type solvent FS265 RL
ketone
acetone × 〇
MEK × 〇
MIBK × 〇
cyclohexanone × 〇
nitrile acetonitrile × 〇
ester ethylacetate × ×
alcoholmethanol × ×
IPA × ×
aromatic hydrocarbon toluene × ×
aliphatic hydrocarbon hexane × ×
* These data were measured at 25℃* “〇” denotes 5wt% to 15wt% of solubility to the solvent* “×” denotes less than 5wt% of solubility to the solvent
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7. Examples of application of the CIR dyes
As near IR absorption dye
1. For stabilizer of recording dyes used in CD-R media
― As a quencher against activated oxygen that oxidizes the recording dye
2. Inks for printed materials readable by IR ray ― Not visible by human eyes
3. For optical filters on the surface of plasma display panels― The panels radiate IR ray that causes malfunction of remote controllers.
As heat absorber
1. For material of heat accumulation/insulation textile― winter clothes, ski wear
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Tel: +65-6294-6994
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E-mail: [email protected]
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