公开(公告)号：US20150018498A1

公开(公告)日：2015-01-15

申请号：US13938874

申请日：2013-07-10

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA ,  XEROX CORPORATION

Inventor： Andrew J. MYLES ,  Karen A. MOFFAT ,  Jordan H. WOSNICK ,  Valerie M. FARRUGIA

IPC: C08G63/91

CPC classification number: C08G63/90 ,  C08G63/64

Abstract: A method of making a pure block copolymer includes forming a crude block copolymer; heating a solution of the crude block copolymer and alcohol; and cooling the solution to promote precipitation of a purified block copolymer, wherein an amount of impurities remaining in the purified block copolymer is from about 0 to about 5 wt % based on a total weight of the purified block copolymer; a ratio of a polydispersity index of the crude block copolymer to a polydispersity index of the purified block copolymer is from about 1.02 to about 1.25; a ratio of a molecular weight of the crude block copolymer to a molecular weight of the purified block copolymer is from about 0.75 to about 1.0; and a ratio of a number average molecular weight of the crude block copolymer to a number average molecular weight of the purified block copolymer is from about 0.65 to about 1.

Abstract translation: 制备纯嵌段共聚物的方法包括形成粗嵌段共聚物; 加热粗制嵌段共聚物和醇的溶液; 并冷却溶液以促进纯化的嵌段共聚物的沉淀，其中基于纯化的嵌段共聚物的总重量，残留在纯化的嵌段共聚物中的杂质的量为约0至约5重量％; 粗嵌段共聚物的多分散指数与纯化的嵌段共聚物的多分散指数之比为约1.02至约1.25; 粗制嵌段共聚物的分子量与纯化的嵌段共聚物的分子量的比例为约0.75至约1.0; 粗嵌段共聚物的数均分子量与纯化嵌段共聚物的数均分子量的比例为约0.65〜约1。

公开(公告)号：US20230357568A1

公开(公告)日：2023-11-09

申请号：US18352333

申请日：2023-07-14

Applicant: Xerox Corporation

Inventor： Karen A. MOFFAT ,  Valerie M. FARRUGIA

IPC: C08L77/02 ,  C08J3/14 ,  C08L77/06

CPC classification number: C08L77/02 ,  C08J3/14 ,  C08L77/06 ,  C08K3/014

Abstract: A nonlimiting example method of forming polyamide polymer particles having pigments therein may comprising: mixing a mixture comprising a polyamide having a pigment pendent from a backbone of the polyamide (PP-polyamide), a carrier fluid that is immiscible with the PP-polyamide, and optionally an emulsion stabilizer at a temperature greater than a melting point or softening temperature of the PP-polyamide and at a shear rate sufficiently high to disperse the PP-polyamide in the carrier fluid; and cooling the mixture to below the melting point or softening temperature of the PP-polyamide to form solidified particles comprising the PP-polyamide and, when present, the emulsion stabilizer associated with an outer surface of the solidified particles. Said solidified particles may be used in additive manufacturing to make a variety of objects like containers, toys, furniture parts and decorative home goods, plastic gears, automotive parts, medical items, and the like.

公开(公告)号：US20230159704A1

公开(公告)日：2023-05-25

申请号：US18147645

申请日：2022-12-28

Applicant: Xerox Corporation

Inventor： Valerie M. FARRUGIA ,  Karen A. MOFFAT

IPC: C08G69/48

CPC classification number: C08G69/48

Abstract: A nonlimiting example method for synthesizing a pigment-pendent polyamide (PP-polyamide) may comprise: functionalizing metal oxide particles bound to a pigment particle with a compound having an epoxy to produce a surface treated pigment having a pendent epoxy; and reacting the pendent epoxy with a polyamide to yield the PP-polyamide. Another nonlimiting example method for synthesizing a PP-polyamide may comprise: functionalizing metal oxide particles bound to a pigment particle with a silica particle having a carboxylic acid surface treatment to produce a surface treated pigment having a pendent carboxylic acid; converting the pendent carboxylic acid to a pendent acid chloride; and reacting the pendent acid chloride with a polyamide to yield the PP-polyamide. Said PP-polyamide may be useful in producing objects by methods that include melt extrusion, injection molding, compression molding, melt spinning, melt emulsification, spray drying, cryogenic milling, freeze drying polymer dispersions, and precipitation of polymer dispersions.

公开(公告)号：US20180039194A1

公开(公告)日：2018-02-08

申请号：US15227827

申请日：2016-08-03

Applicant: XEROX CORPORATION

Inventor： Karen A. MOFFAT ,  DAVID J.W. LAWTON ,  MELANIE L. DAVIS ,  JUAN A. MORALES-TIRADO ,  VARUN SAMBHY

IPC: G03G9/09 ,  G03G9/08 ,  G03G9/087

CPC classification number: G03G9/0902 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0926

Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 75.