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Electroluminescent composition containing organopolysiloxane and electroluminescent device usable as a back-lighting unit for liquid crystal display

  • US 4,882,517 A
  • Filed: 02/07/1989
  • Issued: 11/21/1989
  • Est. Priority Date: 02/09/1988
  • Status: Expired due to Term
First Claim
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1. 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
    
    
    space="preserve" listing-type="equation">R.sup.1.sub.a R.sup.2.sub.b SiO.sub.(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.

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