COLORED LIGHT EMITTING SHEET AND COLORED LIGHT EMITTING GLASS

Abstract

The present invention aims to provide a colored luminescent sheet that enables production of a colored glass providing better aesthetic appearance, and a colored luminescent glass including the colored luminescent sheet. Provided is a colored luminescent sheet including: a thermoplastic resin; a colorant; and a luminescent material that emits visible light having a wavelength of 380 to 750 nm under excitation light.

Claims

1. A colored luminescent sheet comprising: a thermoplastic resin; a colorant; and a luminescent material that emits visible light having a wavelength of 380 to 750 nm under excitation light.

2. The colored luminescent sheet according to claim 1, wherein the colorant is a pigment.

3. The colored luminescent sheet according to claim 2, wherein the pigment is a white pigment.

4. The colored luminescent sheet according to claim 3, wherein the white pigment is calcium carbonate.

5. The colored luminescent sheet according to claim 1, wherein the luminescent material is present in an amount of 0.1 to 50 parts by weight relative to 100 parts by weight of the colorant.

6. A colored luminescent glass having a laminated structure including a transparent plate and the colored luminescent sheet according to claim 1.

7. A colored luminescent glass having a structure in which the colored luminescent sheet according to claim 1 is interposed between a pair of transparent plates.

8. A window glass comprising: an excitation light source; and the colored luminescent glass according to claim 6.

9. A display window comprising: an excitation light source; and the colored luminescent glass according to claim 6.

10. A partition comprising: an excitation light source; and the colored luminescent glass according to claim 6.

11. A wall glass comprising: an excitation light source; and the colored luminescent glass according to claim 6.

Description

DESCRIPTION OF EMBODIMENTS

[0084] The present invention is more specifically described in the following with reference to, but not limited to, examples.

EXAMPLE 1

(1) Preparation of Eu(TFA).SUB.3.phen

[0085] Europium acetate (Eu(CH.sub.3COO).sub.3) in an amount of 12.5 mmol was dissolved in 50 mL of distilled water. To the solution was added 33.6 mmol of trifluoroacetylacetone (TFA, CH.sub.3COCH.sub.2COCF.sub.3), and the mixture was stirred at room temperature for 3 hours. The mixture was filtered to obtain precipitated solid. The precipitated solid was washed with water, and recrystallized using methanol and distilled water to give Eu(TFA).sub.3(H.sub.2O).sub.2. Then, 5.77 g of the resulting complex (Eu(TFA).sub.3(H.sub.2O).sub.2) and 2.5 g of 1,10-phenanthroline (phen) were dissolved in 100 mL of methanol, followed by heating under reflux for 12 hours. After 12 hours, methanol was distilled off under reduced pressure, thereby obtaining a white product. The white product powder was washed with toluene and unreacted materials were removed by suction filtration. Subsequently, toluene was distilled off under reduced pressure, thereby preparing a powder. Through recrystallization using a solvent mixture of toluene and hexane, Eu(TFA).sub.3phen was obtained.

(2) Preparation of Colored Luminescent Sheet

[0086] To 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer were added 0.2 parts by weight of Eu(TFA).sub.3phen as a luminescent material, 3.2 parts by weight of calcium carbonate as a pigment, and acetylacetone magnesium in an amount giving a final concentration of 0.036 phr as an adhesion modifier, whereby a colored luminescent plasticizer solution was prepared. The entire amount of the plasticizer solution obtained and 100 parts by weight of polyvinyl butyral (PVB, degree of polymerization: 1700) were sufficiently mixed and kneaded using a mixing roll to prepare a resin composition.

[0087] The obtained resin composition was extruded using an extruder to provide a colored luminescent sheet having a thickness of 760 m.

(3) Production of Colored Luminescent Glass

[0088] The obtained colored luminescent sheet was interposed between a pair of clear glass plates (thickness: 2.5 mm, 30 cm in length30 cm in width) to prepare a laminate. The laminate was pressed under vacuum at 90 C. for 30 minutes to be press-bonded using a vacuum laminator. The press-bonded laminate was subjected to another 20-minute press-bonding under 14 MPa at 140 C. using an autoclave, thereby obtaining a colored luminescent glass having a laminated glass structure.

EXAMPLE 2

[0089] Terbium acetate (Tb(CH.sub.3COO).sub.3) in an amount of 12.5 mmol was dissolved in 50 mL of distilled water. To the solution was added 33.6 mmol of trifluoroacetylacetone (TFA, CH.sub.3COCH.sub.2COCF.sub.3), and the mixture was stirred at room temperature for 3 hours. The mixture was filtered to obtain precipitated solid. The precipitated solid was washed with water, and recrystallized using methanol and distilled water to give Tb(TFA).sub.3(H.sub.2O).sub.2. Then, 5.77 g of the resulting complex (Tb(TFA).sub.3(H.sub.2O).sub.2) and 2.5 g of 1,10-phenanthroline (phen) were dissolved in 100 mL of methanol, followed by heating under reflux for 12 hours. After 12 hours, methanol was distilled off under reduced pressure, thereby obtaining a white product. The white product powder was washed with toluene and unreacted materials were removed by suction filtration. Subsequently, toluene was distilled off under reduced pressure, thereby preparing a powder. Through recrystallization using a solvent mixture of toluene and hexane, Tb(TFA).sub.3phen was obtained.

[0090] A colored luminescent sheet and a colored luminescent glass were produced as in Example 1 except that Tb(TFA).sub.3phen was used instead of Eu(TFA).sub.3phen.

EXAMPLE 3

[0091] A colored luminescent sheet and a colored luminescent glass were produced as in Example 1 except that diethyl-2, 5-dihydroxyterephthalate (available from Sigma-Aldrich, diethyl 2,5-dihydroxyterephthalate) was used instead of Eu(TFA).sub.3phen.

EXAMPLES 4 and 5

[0092] Colored luminescent sheets and colored luminescent glasses were produced as in Example 1 except that the amount of Eu(TFA).sub.3phen added was changed to 0.05 parts by weight or 0.5 parts by weight.

EXAMPLE 6

[0093] A colored luminescent sheet and a colored luminescent glass were produced as in Example 1 except that 3.2 parts by weight of Pigment Blue 15 as a blue pigment was added instead of calcium carbonate.

EXAMPLE 7

[0094] A colored luminescent sheet and a colored luminescent glass were produced as in Example 1 except that 3.2 parts by weight of Pigment Green 7 as a green pigment was added instead of calcium carbonate.

Comparative Examples 1 to 3

[0095] Colored luminescent sheets and colored luminescent glasses were obtained as in Examples 1 to 3 except that no calcium carbonate was added.

Comparative Examples 4 to 8

[0096] Colored luminescent sheets and colored luminescent glasses were obtained as in Examples 1 to 3, 6, and 7 except that no luminescent material was added.

Evaluation

[0097] The colored luminescent glasses obtained in the examples and comparative examples were evaluated by the following methods.

[0098] Tables 1 and 2 show the results.

[0099] Each of the colored luminescent glasses obtained in the examples and comparative examples was irradiated with light having a wavelength of 405 nm and an output power of 300 mW using NDV4B16 available from Nichia Corporation as an excitation light source.

[0100] The colored luminescent glasses of the examples under irradiation with excitation light provided excellent aesthetic appearance that can also be described as blurred luminescence (rated as o (Good) or oo (Excellent) for the blurred luminescence properties). In particular, the colored luminescent glasses of Examples 1 to 5, which used calcium carbonate as a colorant, provided highly excellent aesthetic appearance (rated as oo (Excellent) for the blurred luminescence properties). In contrast, the luminescent glasses of Comparative Examples 1 to 3 did not provide blurred luminescence although they emitted light owing to the luminescent material (rated as x (Poor) for the blurred luminescence properties). The colored glasses of Comparative Examples 4 to 6 did not emit light even under excitation light irradiation (rated as x (Poor) for the blurred luminescence properties).

[0101] Twenty observers compared, under irradiation with excitation light, the difference in aesthetic appearance based on the presence or absence of a colorant. Specifically, they compared Examples 1, 4, and 5 with Comparative Example 1, Example 2 with Comparative Example 2, and Example 3 with Comparative Example 3. A rating of o (Good) was given when 16 or more of the 20 observers felt that the colored luminescent glass containing a colorant was more beautiful. A rating of x (Poor) was given when 15 or less observers felt that the laminated glass containing a colorant was more beautiful.

[0102] Similarly, 20 observers compared, under irradiation with excitation light, the difference in aesthetic appearance based on the presence or absence of a luminescent material. Specifically, they compared Example 1 with Comparative Example 4, Example 2 with Comparative Example 5, Example 3 with Comparative Example 6, Example 6 with Comparative Example 7, and Example 7 with Comparative Example 8. A rating of o (Good) was given when 16 or more of the 20 observers felt that the colored luminescent glass containing a luminescent material was more beautiful. A rating of x (Poor) was given when 15 or less observers felt that the laminated glass containing a luminescent material was more beautiful.

TABLE-US-00001 TABLE 1 Exam- Exam- Exam- Exam- Exam- Exam- Exam- ple 1 ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 Lumi- PVB phr 100 100 100 100 100 100 100 nescent 3GO phr 40 40 40 40 40 40 40 sheet Luminescent Eu(TFA).sub.3phen phr 0.2 0.05 0.5 0.2 0.2 formu- material Tb(TFA).sub.3phen phr 0.2 lation Diethyl 2,5- phr 0.2 dihydroxy- terephthalate Colorant Calcium phr 3.2 3.2 3.2 3.2 3.2 carbonate Pigment Blue 15 phr 3.2 Pigment Green 7 phr 3.2 Adhesion Acetylacetone phr 0.036 0.036 0.036 0.036 0.036 0.036 0.036 modifier magnesium Evalu- Blurred luminescence properties ation Comparison Comparison with glass not on aesthetic containing colorant (Com- appearances parative Examples 1 to 3) Comparison with glass not containing luminescent material (Comparative Examples 4 to 8)

TABLE-US-00002 TABLE 2 Compar- Compar- Compar- Compar- Compar- Compar- Compar- Compar- ative ative ative ative ative ative ative ative Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- ple 1 ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 ple 8 Lumi- PVB phr 100 100 100 100 100 100 100 100 nescent 3GO phr 40 40 40 40 40 40 40 40 sheet Luminescent Eu(TFA).sub.3phen phr 0.2 formu- material Tb(TFA).sub.3phen phr 0.2 lation Diethyl 2,5- phr 0.2 dihydroxy- terephthalate Colorant Calcium phr 3.2 3.2 3.2 carbonate Pigment Blue 15 phr 3.2 Pigment Green 7 phr 3.2 Adhesion Acetylacetone phr 0.036 0.036 0.036 0.036 0.036 0.036 0.036 0.036 modifier magnesium Evalu- Blurred luminescence properties x x x x x x x x ation Comparison Comparison with glass not on aesthetic containing colorant (Com- appearances parative Examples 1 to 3) Comparison with glass not containing luminescent material (Comparative Examples 4 to 8)

INDUSTRIAL APPLICABILITY

[0103] The present invention can provide a colored luminescent sheet that enables production of a colored glass providing better aesthetic appearance, and a colored luminescent glass including the colored luminescent sheet.