公开(公告)号：US20230312960A1

公开(公告)日：2023-10-05

申请号：US18192738

申请日：2023-03-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Kenji KITADA ,  Takeshi YANO ,  Shinichi NAITO ,  Hiroshi ODAJIMA

IPC: C09D11/322 ,  C09D11/102

CPC classification number: C09D11/322 ,  C09D11/102

Abstract: An aqueous ink jet ink contains a pigment aqueous dispersion, water, and a water-soluble organic solvent. The pigment aqueous dispersion contains a pigment dispersed in a polyurethane resin obtained by reaction of an active hydrogen atom-containing component and an organic polyisocyanate component. The active hydrogen atom-containing component contains a quaternary ammonium compound. The organic polyisocyanate component contains one or more selected from the group consisting of a linear or branched aliphatic polyisocyanate, an alicyclic polyisocyanate, and an aromatic polyisocyanate. The weight rate of the quaternary ammonium compound is 12 wt % or more based on the total weight of the active hydrogen atom-containing component and the organic polyisocyanate component.

公开(公告)号：US20230312962A1

公开(公告)日：2023-10-05

申请号：US18192771

申请日：2023-03-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Takeshi YANO ,  Kenji KITADA ,  Shinichi NAITO ,  Hiroshi ODAJIMA

IPC: C09D11/326 ,  C09D11/38

CPC classification number: C09D11/326 ,  C09D11/38

Abstract: An embodiment of the present disclosure relates to an aqueous ink jet ink containing a pigment aqueous dispersion, water, and a water-soluble organic solvent. The pigment aqueous dispersion contains a pigment dispersed in a polyurethane resin obtained by reaction of an active hydrogen atom-containing component and an organic polyisocyanate component and an aqueous medium. The active hydrogen atom-containing component contains a polycarbonate polyol, the organic polyisocyanate component contains one or more selected from the group consisting of a linear or branched aliphatic polyisocyanate, an alicyclic polyisocyanate, and an aromatic polyisocyanate. A film obtained by drying the pigment aqueous dispersion at 50° C. for 12 hours has an elastic modulus G′ at 160° C. of 1 to 10 MPa.

公开(公告)号：US20230312956A1

公开(公告)日：2023-10-05

申请号：US18127814

申请日：2023-03-29

Applicant: SANYO CHEMICAL INDUSTRIES, LTD. ,  SEIKO EPSON CORPORATION

Inventor： Hiroshi ODAJIMA ,  Kenji KITADA ,  Takeshi YANO ,  Shinichi NAITO

IPC: C09D11/322 ,  C09D11/102

CPC classification number: C09D11/322 ,  C09D11/102

Abstract: Provided is an aqueous pigment dispersion having high initial dispersion stability and high storage stability and demonstrating high color developability in particularly fabrics not pre-treated. An aqueous pigment dispersion for an aqueous inkjet ink, including a pigment and an aqueous medium, the pigment being dispersed with a polyurethane resin prepared by reacting an active hydrogen atom-containing component (A) with an organic polyisocyanate component (B). The active hydrogen atom-containing component (A) contains a quaternary ammonium compound (a1), and the quaternary ammonium compound (a1) is contained in a weight proportion of 12% by weight or more relative to the total weight of the active hydrogen atom-containing component (A) and the organic polyisocyanate component (B).

公开(公告)号：US20230312961A1

公开(公告)日：2023-10-05

申请号：US18127794

申请日：2023-03-29

Applicant: SANYO CHEMICAL INDUSTRIES, LTD. ,  SEIKO EPSON CORPORATION

Inventor： Hiroshi ODAJIMA ,  Takeshi YANO ,  Kenji KITADA ,  Shinichi NAITO

IPC: C09D11/326 ,  C09D175/08

CPC classification number: C09D11/326 ,  C09D175/08

Abstract: Provided is an aqueous pigment dispersion having high initial dispersibility, high storage stability, and high color developability after printing, and particularly having high rub resistance (rubbing fastness) in cotton fabrics. An aqueous pigment dispersion for an aqueous inkjet ink, including a pigment and an aqueous medium, the pigment being dispersed with a polyurethane resin prepared by reacting an active hydrogen atom-containing component (A) with an organic polyisocyanate component (B), the active hydrogen atom-containing component (A) containing a polycarbonate polyol (a1), the organic polyisocyanate component (B) containing at least one compounds selected from the group consisting of aliphatic polyisocyanates (b1), alicyclic polyisocyanates (b2), and aromatic polyisocyanates (b3), wherein a coating film formed by drying the aqueous pigment dispersion at 50° C. for 12 hours has a storage modulus G′ at 160° C. of 1 to 10 MPa.