Particle dispersion liquid, particles, particle dispersion liquid cartridge, process cartridge, image forming apparatus, and image forming method
View Patent ↗The present invention provides a particle dispersion liquid including (meth)acrylic resin-containing hydrophobic particles, an acetylene glycol surfactant adsorbed to the hydrophobic particles, and water; the particle size, in a state of being swollen due to absorbing water until saturation, of the hydrophobic particles to which the acetylene glycol surfactant has been adsorbed being 1.1 to 2 times as large as the particle size of the hydrophobic particles in a dried state.
1. A particle dispersion liquid comprising:
(meth)acrylic resin-containing hydrophobic particles,
an acetylene glycol surfactant adsorbed to the (meth)acrylic resin-containing hydrophobic particles, and
water; wherein
a particle size of the (meth)acrylic resin-containing hydrophobic particles to which the acetylene glycol surfactant has been adsorbed in a swollen state due to absorbing water until saturation, is about 1.1 to about 2 times as large as the particle size of the (meth)acrylic resin-containing hydrophobic particles in a dried state, and
the (meth)acrylic resin is at least one resin selected from a styrene-(meth)acrylic resin or an ethylene-(meth)acrylic resin.
2. The particle dispersion liquid of claim 1 , wherein the acetylene glycol surfactant is contained in an amount of about 0.1 to about 5% by weight weight with respect to a total weight of the particle dispersion liquid.
3. The particle dispersion liquid of claim 1 , wherein the acetylene glycol surfactant is polyoxyethylene acetylene glycol ether.
4. The particle dispersion liquid of claim 1 , wherein the (meth)acrylic resin-containing hydrophobic particles further comprise a pigment.
5. The particle dispersion liquid of claim 4 , wherein the pigment is at least one pigment selected from cyan, magenta, yellow, red, green, blue or black pigments.
6. The particle dispersion liquid of claim 1 , wherein the (meth)acrylic resin-containing hydrophobic particles further comprise a magnetic material.
7. The particle dispersion liquid of claim 6 , wherein the magnetic material is at least one magnetic material selected from magnetite, nickel, yttrium-iron-garnet (YIG), iron powder, g-iron oxide, Ni—Zn ferrite, Mn—Zn ferrite, Cu—Zn ferrite or Li—Zn ferrite.
8. The particle dispersion liquid of claim 7 , wherein the magnetic material is YIG, and the magnetization of YIG particles in a 500 Oe magnetic field is about 10 emu/g or more.
9. The particle dispersion liquid of claim 7 , wherein the magnetic material is YIG, and the surfaces of YIG particles are hydrophobicized.
10. The particle dispersion liquid of claim 7 , wherein the magnetic material is YIG, and the content of YIG particles in the (meth)acrylic resin-containing hydrophobic particles is about 1.4% by weight to about 13% by weight with respect to a total weight of the (meth)acrylic resin-containing hydrophobic particles.
11. The particle dispersion liquid of claim 1 , wherein a monomer that is polymerized to configure the (meth)acrylic resin is a (meth)acrylate ester whose alcohol residue is an unsubstituted alkyl group having 1 to 18 carbon atoms.
12. Particles comprising:
(meth)acrylic resin,
an acetylene glycol surfactant, and water; wherein
a size of the particle in a swollen state due to absorbing water until saturation is about 1.1 to about 2 times as large as the size of the particle in a dried state, and
the (meth)acrylic resin is at least one resin selected from a styrene-(meth)acrylic resin or an ethylene-(meth)acrylic resin.
13. The particles of claim 12 , wherein the acetylene glycol surfactant is contained in an amount of about 0.01 to about 20% by weight with respect to a total weight of the particles.
14. The particles of claim 12 , wherein the acetylene glycol surfactant is polyoxyethylene acetylene glycol ether.
15. The particles of claim 12 , wherein the particles further comprise a pigment.
16. The particles of claim 15 , wherein the pigment is at least one pigment selected from cyan, magenta, yellow, red, green, blue or black pigments.
17. The particles of claim 12 , wherein the particles further comprise a magnetic material.
18. The particles of claim 17 , wherein the magnetic material is at least one magnetic material selected from magnetite, nickel, yttrium-iron-garnet (YIG), iron powder, g-iron oxide, Ni—Zn ferrite, Mn—Zn ferrite, Cu—Zn ferrite or Li—Zn ferrite.
19. The particles of claim 12 , wherein a monomer that is polymerized to configure the (meth)acrylic resin is a (meth)acrylate ester whose alcohol residue is an unsubstituted alkyl group having 1 to 18 carbon atoms.