公开(公告)号：US10196533B2

公开(公告)日：2019-02-05

申请号：US15518232

申请日：2014-10-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Tienteh Chen ,  June Yang ,  Marcos A. Barreto

IPC: C09D11/033 ,  C09D11/102 ,  C09D11/107 ,  C09D11/322 ,  C09D11/326 ,  C09D11/38

Abstract: A hydrophilic pigment dispersant for an inkjet ink includes water and a hydrophilic polyurethane having a weight average molecular weight from 3,000 to 15,000, and an acid number ranging from 50 to 100. The polyurethane is formed from 25 wt % to 70 wt % of a non-aromatic polyisocyanate; 0 wt % to 60 wt % of a polyol having a weight average molecular weight from 500 to 5,000; 0 wt % to 30 wt % of an aromatic diol having a weight average molecular weight ranging from 100 to 1000; 5 wt % to 25 wt % of an acid monomer having a hydroxyl functional group, an amino functional group, or both hydroxyl and amino functional groups; and 0 wt % to 5 wt % of a polyethyleneoxide compound having a hydroxyl functional group, an amino functional group, or both hydroxyl and amino functional groups; wherein at least one of the polyol or the aromatic diol is present.

公开(公告)号：US20170247558A1

公开(公告)日：2017-08-31

申请号：US15518232

申请日：2014-10-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Tienteh Chen ,  June Yang ,  Marcos A. Barreto

IPC: C09D11/38 ,  C09D11/033 ,  C09D11/107 ,  C09D11/322 ,  C09D11/102

CPC classification number: C09D11/38 ,  C09D11/033 ,  C09D11/102 ,  C09D11/107 ,  C09D11/322 ,  C09D11/326

Abstract: A hydrophilic pigment dispersant for an inkjet ink includes water and a hydrophilic polyurethane having a weight average molecular weight from 3,000 to 15,000, and an acid number ranging from 50 to 100. The polyurethane is formed from 25 wt % to 70 wt % of a non-aromatic polyisocyanate; 0 wt % to 60 wt % of a polyol having a weight average molecular weight from 500 to 5,000; 0 wt % to 30 wt % of an aromatic diol having a weight average molecular weight ranging from 100 to 1000; 5 wt % to 25 wt % of an acid monomer having a hydroxyl functional group, an amino functional group, or both hydroxyl and amino functional groups; and 0 wt % to 5 wt % of a polyethyleneoxide compound having a hydroxyl functional group, an amino functional group, or both hydroxyl and amino functional groups; wherein at least one of the polyol or the aromatic diol is present.

公开(公告)号：US11760892B2

公开(公告)日：2023-09-19

申请号：US16765599

申请日：2018-01-19

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Dennis Z. Guo ,  Jie Zheng ,  Tienteh Chen ,  David Michael Ingle ,  Rodney David Stramel ,  June Yang ,  Marcos A. Barreto Caban

IPC: C09D11/322 ,  C09B47/04 ,  C09D11/033 ,  C09D11/037 ,  C09D11/107 ,  C09D17/00

CPC classification number: C09D11/322 ,  C09B47/04 ,  C09D11/033 ,  C09D11/037 ,  C09D11/107 ,  C09D17/001 ,  C09D17/003

Abstract: The present disclosure is drawn to aqueous pigment dispersions. In one example, an aqueous pigment dispersion can include from 40 wt % to 90 wt % water, from 2 wt % to 30 wt % organic co-solvent, from 7.5 wt % to 30 wt % copper phthalocyanine pigment, from 0.5 wt % to 5 wt % styrene-acrylic dispersant, and from 0.5 wt % to 5 wt % hydrophilic polyurethane dispersant having a weight average molecular weight from 10,000 Mw to 30,000 Mw. The styrene-acrylic dispersant and the hydrophilic polyurethane dispersant can be present at a weight ratio from 1:10 to 2:1.

公开(公告)号：US20230151236A1

公开(公告)日：2023-05-18

申请号：US17916437

申请日：2020-06-18

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Marcos A. Barreto Caban ,  June Yang ,  Elvin Igartua Nieves

IPC: C09D11/38 ,  C09B67/22 ,  C09B67/46 ,  C09D11/322 ,  C09D11/037 ,  C09D11/033 ,  C09D11/102

CPC classification number: C09D11/38 ,  C09B67/0036 ,  C09B67/0085 ,  C09D11/322 ,  C09D11/037 ,  C09D11/033 ,  C09D11/102

Abstract: A magenta pigment dispersant can include a mixture of quinacridones including a first quinacridone including two nitrogen- and aromatic-containing pendant groups and a second quinacridone with one nitrogen- and aromatic-containing pendant group.