Seiko Epson Corporation

Naoki Koike

Jun Ito

Kenichiro Kubota

Makoto Nagase

Toru Saito

Keiji Iida

Takayoshi Kagata

Atsushi Denda

Toshiyuki Yoda

Kiyoshi Nakamura

Shugo Hattori

Kyohei Tanaka

Maki Nariai

Hiroshi Kato

Tsuyoshi Sano

Shinichi Kamoshida

Kiyohiko Takemoto

Ippei Okuda

Hidehiko Komatsu

Akihito Sao

Shigeki Suzuki

Shiki Hirata

A radiation curable ink jet composition includes polymerizable compounds and a photopolymerization initiator, the polymerizable compounds include a monofunctional monomer, a content of the monofunctional monomer with respect to a total mass of the polymerizable compounds is 90 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate.

Radiation curable ink jet composition and ink jet method

A recording method includes a white ink attachment step, in which a white ink composition containing a white colorant is attached to a recording medium; a non-white ink attachment step, in which a non-white ink composition containing a non-white colorant is attached to overlap the attached white ink composition; a first treatment liquid attachment step, accompanying the white ink attachment step and in which a treatment liquid containing a flocculant is attached to the recording medium; and a second treatment liquid attachment step, accompanying the non-white ink attachment step and in which a treatment liquid containing a flocculant is attached to the recording medium. The white ink composition experiences a five-fold or greater increase in viscosity when mixed with a 7% by mass aqueous solution of calcium formate in a ratio by mass of 10:1, the white ink composition to the aqueous solution of calcium formate. The attachment density of the treatment liquid in the second treatment liquid attachment step is lower than that in the first treatment liquid attachment step.

Recording method and recording apparatus

A radiation curable ink jet composition includes polymerizable compounds; and a photopolymerization initiator, the polymerizable compounds include a vinyl ether group-containing (meth)acrylate represented by the following general formula (I), a content of the vinyl ether group-containing (meth)acrylate with respect to a total mass of the radiation curable ink jet composition is 15 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate.HC═CR—CO—OR—O—CH═CH—R  (I)In the above formula, Rrepresents a hydrogen atom or a methyl group, Rrepresents a divalent organic residue having 2 to 20 carbon atoms, and Rrepresents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.

A non-aqueous ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a cyclic ester compound, at least one first solvent represented by the following General Formula (1) and having a flash point of 140&#xb0; C. or lower: RO&#x2014;(RO)&#x2014;R, a second solvent represented by the General Formula (1), and C.I. Pigment Orange-43 (PO-43) as a pigment. In the at least one first solvent represented by General Formula (1), Rand Reach independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, Rrepresents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6. The second solvent represented by General Formula (1) includes a glycol monoether compound in which at least one of Rand Ris hydrogen. A volume average particle diameter of the PO-43 is 100 nm or more and 400 nm or less.

Ink jet ink composition, ink jet recording method, and ink set

A radiation-curing ink jet ink composition includes a urethane (meth)acrylate including one (meth)acryloyl group, the amount of the urethane (meth)acrylate being 5.0% by mass or more and 30.0% by mass or less of the total amount of the ink composition, and a (meth)acrylate including an aromatic ring and one (meth)acryloyl group, the amount of the (meth)acrylate being 4.0% by mass or more and 50.0% by mass or less of the total amount of the ink composition.

Ink composition

A radiation-curable ink jet composition includes a multifunctional monomer and a vinyl methyl oxazolidinone. The content of the multifunctional monomer is 5 to 50 mass % based on the total amount of the radiation-curable ink jet composition.

Radiation-curable ink jet composition and ink jet method

A radiation-curable ink jet composition includes vinyl methyl oxazolidinone and a vinyl ether group-containing (meth)acrylate represented by the following formula (1):HC&#x2550;CR&#x2014;CO&#x2014;OR&#x2014;O&#x2014;CH&#x2550;CH&#x2014;R(where, Ris a hydrogen atom or a methyl group, Ris a divalent C2-C20 organic residue, and Ris a hydrogen atom or a monovalent C1-C11 organic residue).

A radiation-curable ink jet composition includes a monofunctional (meth)acrylate monomer and vinyl methyl oxazolidinone.

A UV-curable ink jet ink composition includes: 10.00% by mass or more and 60.00% by mass or less, relative to a total mass of the ink composition, of a compound represented by formula (A); 10.00% by mass or more and 50.00% by mass or less, relative to the total mass of the ink composition, of one or more monofunctional monomers having an alicyclic hydrocarbon group or a cyclic ether group; 0.05% by mass or more and 0.50% by mass or less, relative to the total mass of the ink composition, of one or more fluorescent brighteners including a compound represented by formula (b1), (b2), (b3), or (b4); and 3.00% by mass or more and 8.00% by mass or less, relative to the total mass of the ink composition, of one or more acylphosphine oxide polymerization initiators.

UV-curable ink jet ink composition

A radiation curable ink comprises a compound represented by the following Formula (I): a compound represented by the following Formula (II): and a compound represented by the following Formula (III): 

Radiation curable ink

An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes at least one solvent represented by RO&#x2014;(RO)&#x2014;Rand having a flash point of 140&#xb0; C. or lower and C.I. Pigment Orange-43 (PO-43) as a pigment, wherein Rand Reach independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, Rrepresents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6.

An ink composition includes a solvent containing at least one compound represented by the following general formula (1):RO&#x2014;(RO)&#x2014;R&#x2003;&#x2003;(1)

Ink jet composition and ink jet recording method

A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains a glycol ether. The amount of water in the non-aqueous ink jet composition is 10 mass % or less based on the total amount of the non-aqueous ink jet composition.

Non-aqueous ink jet composition

An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a solvent containing at least one cyclic ester compound; and C.I. Pigment Orange-43 (PO-43) as a pigment.

Growing community of inventors

Matsumoto, Japan

Naoki Koike