EP0328120A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electroluminescent composition and electroluminescent device therewith
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1989-02-09
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Granted: —
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Expires: 2009-02-09
Abstract
Abstract An electroluminescent device of the dispersion type exhibiting high brightness of electroluminescence and having excellent heat resistance and flexibility can be prepared by using, as the matrix material of the particulate electroluminescent material, a specific cyanoalkyl group-containing organopolysiloxane represented by the average unit formula R<1>aR<2>bSiO(4-a-b)/2, in which R<1> is a cyanoalkyl group having 3 yo 5 carbon atoms, R<2> is a monovalent hydrocarbon group, a is 0.8 to 1.8 and b is 0 to 1.0 with the proviso that a+b is 1.1 to 1.98.
Inventors
- 👤 Kazumasa Maruyama
- 👤 Tatsushi Kaneko
- 👤 Tohru Chiba
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:27
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20; C; C08; C08K; C08K3/00; C09; C09K; C09K11/00; C09K11/02; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
An electroluminescent composition which comprises: (a) a dielectric material as a matrix mainly composed of a cyanoalkyl group-containing organopolysiloxane represented by the average unit formula R¹ a R² b SiO (4-a-b)/2, in which R¹ is a cyanoalkyl group having 3 to 5 carbon atoms, R² is a hydrogen atom or a monovalent hydrocarbon group, the subscript a is a positive number in the range from 0.8 to 1.8 and the subscript b is zero or a positive number not exceeding 1.0 with the proviso that a+b is in the range from 1.1 to 1.98; and (b) a particulate electroluminescent material dispersed in the matrix.
Claim 2
Dependent Claim
104 words
An electroluminescent composition which comprises: (a) a dielectric material as a matrix mainly composed of a cyanoalkyl group-containing organopolysiloxane represented by the average unit formula R¹ a R² b SiO (4-a-b)/2, in which R¹ is a cyanoalkyl group having 3 to 5 carbon atoms, R² is a hydrogen atom or a monovalent hydrocarbon group, the subscript a is a positive number in the range from 0.8 to 1.8 and the subscript b is zero or a positive number not exceeding 1.0 with the proviso that a+b is in the range from 1.1 to 1.98; and (b) a particulate electroluminescent material dispersed in the matrix.
Claim 3
Dependent Claim
34 words
The electroluminescent composition as claimed in claim 1 wherein the amount of the particulate electroluminescent material is in the range from 20 to 80% by volume based on the dielectric material as the matrix.
Claim 4
Dependent Claim
15 words
The electroluminescent compositon as claimed in claim 1 wherein the cyanoalkyl group is 2-cyanoethyl group.
Claim 5
Dependent Claim
23 words
The electroluminescent composition as claimed in claim 1 wherein the subscript b is a positive number in the range from 0.01 to 0.1.
Claim 6
Dependent Claim
22 words
The electroluminescent composition as claimed in claim 1 wherein the particulate electroluminescent material has an average particle diameter not exceeding 50 µm.
Claim 7
Dependent Claim
33 words
The electroluminescent composition as claimed in claim 1 wherein the particulate electroluminescent material is selected from the group consisting of cadmium sulfide, zinc sulfide, zinc selenide, zinc silicate, boron nitride and silicon carbide.
Claim 8
Dependent Claim
124 words
An electroluminescent device which comprises: (A) a layer of an electroluminescent composition comprising (a) a dielectric material as a matrix mainly composed of a cyanoalkyl group-containing organopolysiloxane represented by the average unit formula R¹ a R² b SiO (4-a-b)/2, in which R¹ is a cyanoalkyl group having 3 to 5 carbon atoms, R² is a hydrogen atom or a monovalent hydrocarbon group, the subscript a is a positive number in the range from 0.8 to 1.8 and the subscript b is zero or a positive number not exceeding 1.0 with the proviso that a+b is in the range from 1.1 to 1.98, and (b) a particulate electroluminescent material dispersed in the matrix; and (B) two electrode plates sandwiching the layer of the electroluminescent composition
Claim 9
Dependent Claim
124 words
An electroluminescent device which comprises: (A) a layer of an electroluminescent composition comprising (a) a dielectric material as a matrix mainly composed of a cyanoalkyl group-containing organopolysiloxane represented by the average unit formula R¹ a R² b SiO (4-a-b)/2, in which R¹ is a cyanoalkyl group having 3 to 5 carbon atoms, R² is a hydrogen atom or a monovalent hydrocarbon group, the subscript a is a positive number in the range from 0.8 to 1.8 and the subscript b is zero or a positive number not exceeding 1.0 with the proviso that a+b is in the range from 1.1 to 1.98, and (b) a particulate electroluminescent material dispersed in the matrix; and (B) two electrode plates sandwiching the layer of the electroluminescent composition
Claim 10
Dependent Claim
26 words
The electroluminescent device as claimed in claim 7 wherein the layer of the electroluminescent composition has a thickness in the range from 10 to 70 µm.
Claim 11
Dependent Claim
20 words
The electroluminescent device as claimed in claim 7 wherein one of the electrode plates is transparent, the other being opaque.
Claim 12
Dependent Claim
27 words
The electroluminescent device as claimed in claim 9 wherein an electrically insulating layer is interposed between the layer of the electroluminescent composition and the opaque electrode plate.
References Cited (Backward Citations)
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