Colored pigment particles for electrophoretic displays

Patent metadata

Field	Value
Publication number	US-9846345-B2
Application number	US-201314771400-A
Country	US
Kind code	B2
Filing date	Feb 28, 2013
Priority date	Feb 28, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Electrophoretic displays with an electrophoretic medium having charged pigmented microparticles are disclosed. The microparticles are charged linking molecules polymerized with chromophores of various colors so that microparticles in a variety of colors may be produced. Methods for producing the microparticles and using the microparticles in an electrophoretic display are also disclosed. Such microparticles may be provided separately, or kits may be provided for producing the microparticles.

First claim

What is claimed is:

1. A charged pigment particle comprising an alternating copolymer of a chromophore and a charged linker molecule, wherein the chromophore is selected from the group consisting of:

analogs thereof, and derivatives thereof, wherein R 1 and R 2 are one of —H and -succinimide, and X and Q are each individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof;

analogs thereof, and derivatives thereof, wherein R 3 and R 4 are —H, and X and Q are each individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein each R 1 is individually a C 2 to C 10 alkylene, and each X is one of —OH or —O-succinimide; and

analogs thereof, and derivatives thereof, wherein each R 1 is individually a C 2 to C 10 alkylene, and
wherein the charged linker molecule is selected from the group consisting of:

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each A is individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each X is individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each A is individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each R 2 is individually a C 2 to C 10 alkylene; and

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each R 2 is individually a C 2 to C 10 alkylene, and each Y is one of —OH or —O-succinimide.

2. The charged pigment particle of claim 1 , wherein the charged pigment particle is a red colored cationic microparticle having the structure:

wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each X is individually a C 2 to C 10 alkylene.

3. The charged pigment particle of claim 1 , wherein the charged pigment particle is a blue colored cationic microparticle having the structure:

wherein M is N or P, each R is individually a C 1 to C 10 alkyl, each R 1 is individually a C 2 to C 10 alkylene, and each R 2 is individually a C 2 to C 10 alkylene.

4. The charged pigment particle of claim 1 , wherein the charged pigment particle is a blue colored cationic microparticle having the structure:

wherein M is N or P, each R is individually a C 1 to C 10 alkyl, each R 1 is individually a C 2 to C 10 alkylene, and each R 2 is individually a C 2 to C 10 alkylene.

5. The charged pigment particle of claim 1 , wherein the charged pigment particle is a yellow colored cationic microparticle having the structure:

wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each A, X, and Q are individually a C 2 to C 10 alkylene.

6. The charged pigment particle of claim 1 , wherein the charged pigment particle is a yellow colored cationic microparticle having the structure:

wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each A, X, and Q are individually a C 2 to C 10 alkylene.

7. A charged pigment particle comprising an alternating copolymer of a chromophore and a charged linker molecule, wherein the chromophore is selected from the group consisting of:

analogs thereof, and derivatives thereof, wherein R 1 and R 2 are one of —H and -succinimide, and X and Q are each individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof;

analogs thereof, and derivatives thereof, wherein R 3 and R 4 are —H, and X and Q are each individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein each R 1 is individually a C 2 to C 10 alkylene, and each X is one of —OH or —O-succinimide; and

analogs thereof, and derivatives thereof, wherein each R 1 is individually a C 2 to C 10 alkylene.

8. The charged pigment particle of claim 7 , wherein the charged linker molecule comprises cations selected from the group consisting of quaternary ammonium, quaternary phosphonium, quaternary arsonium, quaternary stibonium, ternary sulfonium cations, or combination thereof.

9. A charged pigment particle comprising an alternating copolymer of a chromophore and a charged linker molecule, wherein the charged linker molecule is selected from the group consisting of:

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each A is individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each X is individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each A is individually a C 2 to C 10 alkylene;

analogs thereof, and derivatives thereof, wherein M is N or P, each R is individually a C 1 to C 10 alkyl, and each R 2 is individually a C 2 to C 10 alkylene; and

Assignees

• Empire Technology Dev Llc

Inventors

• Klein Josef Peter

Classifications

• G02F2001/1678

  characterised by the composition or particle type · CPC title

• G02F1/167 Primary

  by electrophoresis · CPC title

• C09B1/36

  Dyes with acylated amino groups · CPC title

• C09B43/32

  by reacting carboxylic or sulfonic groups, or derivatives thereof, with amines; by reacting keto-groups with amines · CPC title

• C09B1/16

  Amino-anthraquinones {(C09B1/007 takes precedence)} · CPC title