Polymer composition and polymer light emitting device

Patent metadata

Field	Value
Publication number	US-9523007-B2
Application number	US-201414323100-A
Country	US
Kind code	B2
Filing date	Jul 3, 2014
Priority date	Jun 1, 2005
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A polymer composition comprising 1 to 99 wt % of a copolymer (A) and 99 to 1 wt % of a copolymer (B); the polymer composition used as a light emitting material of a light emitting device having high performances; Copolymers (A) and (B) being copolymers showing fluorescence in the solid state and having a polystyrene-reduced number average molecular weight of 10 3 to 10 8 , and containing a repeating unit (a) and a repeating unit (b); Copolymer (A) has a relation of 100>X aA >5, where X aA (%) is a percentage of the mol number of repeating unit (a) based on the sum of the mol numbers of repeating units (a), and Copolymer (B) satisfies a relation of X aB ≦X aA −5, where X aB (%) is a percentage of the mol number of repeating unit (a) based on the sum of the mol numbers of repeating units (a) and (b).

First claim

The invention claimed is:

1. A polymer composition comprising:
the polymer composition comprising 1 to 99 wt % of the following copolymer (A) and 99 to 1 wt % of the following copolymer (B):
Copolymer (A): a copolymer showing fluorescence in the solid state and having a polystyrene-reduced number average molecular weight of 10 3 to 10 8 , and containing a repeating unit (a) and a repeating unit (b), and said copolymer has a relation of 100>X aA >5, provided that X aA (%) is a percentage of the mol number of the repeating unit (a) based on the sum of the mol numbers of the repeating units (a) and (b), and
Copolymer (B): a copolymer showing fluorescence in the solid state and having a polystyrene-reduced number average molecular weight of 10 3 to 10 8 , and containing (a) a repeating unit and (b) a repeating unit, and said copolymer satisfies a relation of X aB ≦X aA −5, provided that X aB (%) is a percentage of the mol number of the repeating unit (a) based on the sum of the mol numbers of the repeating units (a) and (b);
wherein the repeating unit (b) in each Copolymer (A) and Copolymer (B) is a repeating unit represented by the following formula (2):

wherein, X represents —CR 3 R 4 —, R 3 and R 4 represent each independently an alkyl group or an aryl group with the proviso that at least one of R 3 and R 4 represents a phenyl group; when R 3 and R 4 are groups having an alkyl, the alkyl may be interrupted by a group containing a hetero atom, and
the repeating unit (a) in each Copolymer (A) and Copolymer (B) is a repeating unit represented by the following formula (1):

wherein, Ar 1 , Ar 3 and Ar 5 represent each independently an arylene group, Ar 2 and Ar 4 represent each independently an aryl and t represents an integer of 0 to 1 and when there are a plurality of Ar 4 s and Ar 5 s, respectively, they may be the same or different.

2. The polymer composition according to claim 1 , wherein R 3 and R 4 represent each independently an aryl group.

3. The polymer composition according to claim 1 , wherein the repeating unit (a) has a hole injection property or a hole transportation property.

4. The polymer composition according to claim 1 , wherein the composition comprises 5 to 95 wt % of the copolymer (A) and 95 to 5 wt % of the copolymer (B).

5. An ink composition comprising the polymer composition as described in claim 1 .

6. A polymer light emitting device having a light emitting layer between electrodes composed an anode and a cathode wherein the light emitting layer contains the polymer composition as described in claim 1 .

7. A sheet light source comprising the polymer light emitting device as described in claim 6 .

8. A segment display comprising the polymer light emitting device as described in claim 6 .

9. A dot matrix display comprising the polymer light emitting device as described in claim 6 .

Assignees

• Sumitomo Chemical Co

Inventors

• Agata Katsumi
• Yamada Takeshi

Classifications

• C09D11/00 Primary

  Inks · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/1458

  containing sulfur as the only heteroatom · CPC title

• C09K2211/145

  containing oxygen as the only heteroatom · CPC title

• C08G61/125

  with a five-membered ring containing one oxygen atom in the ring · CPC title