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US 12,585,208 B2Granted
Glittering toner, toner-storing unit, developer, developer-storing unit,image forming apparatus, and image forming method
AssigneeRicoh Company, Ltd.
InventorsTsukiko Takahashi, Kohsuke Satoh, Kazumi Suzuki, Daichi Hisakuni, Kazuoki Fuwa
Life of this patent
Estimating the term…
Abstract
A glittering toner includes: a flat metallic pigment having a surface coated with a resin; a polyester-styrene acrylic composite resin; and a polyester resin. When a solubility parameter of the polyester-styrene acrylic composite resin is represented by SP1 (cal/cm3)1/2 and a solubility parameter of the polyester resin is represented by SP2 (cal/cm3)1/2, the SP1 and the SP2 satisfy a relational expression (1): [SP2−SP1>0.3] and the SP1 satisfies a relational expression (2): [10<SP1].
Claims8
A glittering toner comprising:
- a flat metallic pigment having a surface coated with a resin, an aspect ratio of the flat metallic pigment being 20 or more and 200 or less;
- a polyester-styrene acrylic composite resin;
- and
- a polyester resin,
- wherein when a solubility parameter of the polyester-styrene acrylic composite resin is represented by SP1 (cal/cm3)1/2 and a solubility parameter of the polyester resin is represented by SP2 (cal/cm3)1/2, the SPI and the SP2 satisfy a relational expression (1) below and the SP1 satisfies a relational expression (2) below,
- SP2−SP1>0.3 (1)
- 10<SP1 (2),
- wherein the flat metallic pigment includes aluminum, brass, bronze, nickel, stainless steel, zinc, copper, silver, gold, platinum, or metal-deposited flaky glass powder,
- wherein the resin coating the surface of the flat metallic pigment is a polymer of acrylic acid, methacrylic acid, methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, cyclohexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxybutyl acrylate, 2-methoxyethyl acrylate, 2-diethylaminoethyl acrylate, butyl methacrylate, octyl methacrylate, 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,9-nonanediol diacrylate, neopentyl glycol diacrylate, tripropylene glycol diacrylate tetraethylene glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, tetramethylolmethane tetraacrylate, pentaerythritol triacrylate trisacryloxyethyl phosphate, ditrimethylolpropane tetraacrylate, styrene, α-methylstyrene, vinyltoluene, divinylbenzene, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl propionate, maleic acid, crotonic acid, itaconic acid, polybutadiene, linseed oil, soybean oil, epoxidized soybean oil, epoxidized polybutadiene, cyclohexene vinylmonoxide, divinylbenzene monoxide, mono (2-acryloyloxyethyl) acid phosphate, mono (2-methacryloyloxyethyl) acid phosphate, 2-acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, (2-hydroxyethyl) methacrylate acid phosphate, 2-methacryloyloxyethyl acid phosphate, 2-acryloyloxyethyl acid phosphate, diphenyl methacryloyloxyethyl acid phosphate, diphenyl acryloyloxyethyl acid phosphate, dibutyl methacryloyloxyethyl acid phosphate, dibutyl acryloyloxyethyl acid phosphate, dioctyl methacryloyloxyethyl acid phosphate, dioctyl acryloyloxyethyl acid phosphate, 2-methacryloyloxypropyl acid phosphate, bis(2-chloroethyl) vinyl phosphonate, di-2-methacryloyloxyethyl acid phosphate, tri-2-methacryloyloxyethyl acid phosphate, di-2-acryloyloxyethyl acid phosphate, tri-2-acryloyloxyethyl acid phosphate, diallyldibutylphosphonosuccinate, an acrylic-modified polyester having a degree of polymerization of 2 to 20, an acrylic-modified polyether having a degree of polymerization of 2 to 20, an acrylic-modified urethane having a degree of polymerization of 2 to 20, an acrylic-modified epoxy having a degree of polymerization of 2 to 20, or an acrylic-modified spiran having a degree of polymerization of 2 to 20,
- wherein the polyester-styrene acrylic composite resin is an amorphous resin including a styrene-acrylic portion and a polyester portion, and
- wherein the polyester resin includes a component A, a component B, and a component C, component A including a constituent unit of a polyhydric alcohol and a constituent unit of a polycarboxylic acid, component B being a modified polyester containing a bond other than an ester bond, and component C being a linear polyester.
8 more elements
Dependencies are inferred from the claim text.