Pigment distribution system and method of encapsulating pigment
View Patent ↗Provided is a pigment distribution system. The pigment distribution system includes a pigment encapsulated by physically adsorbing a diblock copolymer to the pigment. The diblock copolymer is represented by Formula 1 below: where -A- denotes a hydrophilic monomer, -B- denotes a hydrophobic monomer, m denotes an integer ranging from 1 to 10, and n denotes an integer ranging from 3 to 30, wherein hydrophilic monomers of neighboring diblock copolymer chains are crosslinked using a crosslinker.
1. A pigment distribution system comprising a pigment encapsulated by physically adsorbing a diblock copolymer to the pigment, the diblock copolymer being represented by Formula 1 below:
where -A- denotes a hydrophilic monomer, -B- denotes a hydrophobic monomer, m denotes an integer ranging from 1 to 10, and n denotes an integer ranging from 3 to 30,
wherein hydrophilic monomers of neighboring diblock copolymer chains are crosslinked using a crosslinker.
2. The pigment distribution system of claim 1 , wherein the crosslinker is represented by Formula 2 below:
where X denotes one of an amine group, an acid group, and an epoxy group, and p denotes an integer ranging from 2 to 5.
3. The pigment distribution system of claim 1 , wherein the hydrophilic monomer -A- is an acrylic monomer comprising an acid group, an amine group, or an epoxy group.
4. The pigment distribution system of claim 1 , wherein the hydrophobic monomer -B- is an acrylic or methacrylic monomer comprising a methyl group, an ethyl group, a phenyl group, or a benzyl group.
5. The pigment distribution system of claim 1 , wherein the diblock copolymer has a number average molecular weight in a range of about 6400 to about 17600.
6. The pigment distribution system of claim 1 , wherein a hydrophilic group of the diblock copolymer physically adsorbs to the pigment to encapsulate the pigment.
7. The pigment distribution system of claim 1 , wherein the pigment is coated with a dispersant, and a hydrophobic group of the diblock copolymer physically adsorbs to the dispersant so as to encapsulate the pigment coated with the dispersant.
8. The pigment distribution system of claim 1 , wherein the diblock copolymer has an Am:Bn ratio in a range of 1:3 to 1:10.
9. The pigment distribution system of claim 1 , wherein a ratio of the content of the pigment to the diblock copolymer ranges from 1:3 to 1:10.
10. An ink composition to fabricate a color filter, the ink composition comprising:
a pigment encapsulated by physically adsorbing a diblock copolymer to the pigment, the diblock copolymer being represented by Formula 1 below:
where -A- denotes a hydrophilic monomer, -B- denotes a hydrophobic monomer, m denotes an integer ranging from 1 to 10, and n denotes an integer ranging from 3 to 30,
wherein hydrophilic monomers of neighboring diblock copolymer chains are crosslinked using a crosslinker.
11. The ink composition of claim 10 , further comprising an organic solvent, a binder, a monomer, and an additive.
12. The ink composition of claim 11 , wherein the additive comprises at least one selected from the group consisting of a viscosity modifier, a thermal initiator, a leveling agent, and a surfactant.
13. A color filter fabricated using the ink composition of claim 10 .