公开(公告)号：US11781024B2

公开(公告)日：2023-10-10

申请号：US14905323

申请日：2014-07-15

申请人： FP-Pigments Oy

发明人： Paul Dietz

IPC分类号： C08K9/02 ,  C08K3/26 ,  C08K3/22 ,  C09D7/62 ,  C09C1/40 ,  C09C1/50 ,  C09C1/02 ,  D21H17/67 ,  C09C1/30 ,  C09C3/06 ,  D21H17/69 ,  D21H17/00 ,  C09C1/36 ,  D21H19/66 ,  D21H19/38 ,  C08L33/06 ,  C09D133/06 ,  C09D133/08

CPC分类号： C09D7/62 ,  C08K3/22 ,  C08K3/26 ,  C08L33/06 ,  C09C1/024 ,  C09C1/027 ,  C09C1/028 ,  C09C1/3054 ,  C09C1/3661 ,  C09C1/405 ,  C09C1/50 ,  C09C3/063 ,  C09D133/06 ,  C09D133/08 ,  D21H17/675 ,  D21H17/69 ,  D21H17/74 ,  D21H19/385 ,  D21H19/66 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C08K9/02 ,  C08K2003/2241 ,  C08K2003/265 ,  C08K3/22 ,  C08L33/04 ,  C08K3/26 ,  C08L33/04

摘要： A composition comprising titanium dioxide and additives useful for enhancing the optical performance of titanium dioxide or for allowing substitution of at least part of the titanium dioxide in said composition for additives. At least two additives are added, wherein a first additive comprises a composite pigment and a second additive comprises a reactive polymer. The invention also provides a method for enhancing the optical properties of titanium dioxide compositions.

公开(公告)号：US11753771B2

公开(公告)日：2023-09-12

申请号：US15562943

申请日：2016-03-31

申请人： Stora Enso OYJ

发明人： Elina Skerfe ,  Erik Mattsson

IPC分类号： D21H17/67 ,  D21H17/20 ,  D21H17/70 ,  C01F11/18 ,  D21C5/02 ,  D21J1/00 ,  D21H17/69 ,  C09C3/04 ,  C09C1/02

CPC分类号： D21H17/675 ,  C01F11/181 ,  C09C1/021 ,  C09C3/04 ,  D21C5/02 ,  D21H17/20 ,  D21H17/67 ,  D21H17/69 ,  D21H17/70 ,  D21J1/00 ,  C01P2002/80 ,  C01P2006/60 ,  Y02W30/64

摘要： The invention provides a method of producing a filler comprising calcium carbonate (PCC), preferably to be used in paper or paper board production or in fibre based composites. The method of the invention comprises the steps of; —providing fly ash generated in paper or paper board production; —fractionating said fly ash in at least one step, whereby a coarser fraction is separated from a finer fraction; —forming a suspension of said coarser fraction; —adding carbon dioxide to said suspension to form precipitated calcium carbonate. The method of the invention avoids problems with high amounts of arsenic and heavy metals in the production of filler comprising PCC, when using ash generated in paper or paper board production as a raw material. It has been shown that harmful elements, such as arsenic and heavy metals, are primarily accumulated in the finer fractions of the fly ash. Thus, by using the coarser fraction in the step of carbonation, the amount of arsenic and heavy metals in the final product is reduced.

公开(公告)号：US11371190B2

公开(公告)日：2022-06-28

申请号：US17253303

申请日：2019-06-19

申请人： TRONOX LLC

发明人： Robert McIntyre ,  Julie Elizabeth Kerrod ,  Ben Webber ,  Neil Burniston

IPC分类号： C09C1/36 ,  C09C3/06 ,  D21H21/28 ,  D21H17/67 ,  D21H17/00 ,  D21H17/69

摘要： Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps: an aqueous suspension of titanium dioxide pigments is formed, in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment, in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate, and in a third step, a layer of magnesium oxide and alumina is precipitated on the layer of alumina. Also included are titanium dioxide pigments made by the disclosed process and method using said pigments in paper manufacturing.

公开(公告)号：US20220195672A1

公开(公告)日：2022-06-23

申请号：US17599797

申请日：2020-04-01

申请人： KEMIRA OYJ

发明人： Clayton CAMPBELL ,  Junhua CHEN ,  Zheng DANG

IPC分类号： D21H21/20 ,  D21H17/00 ,  D21H17/55 ,  D21H23/50 ,  D21H17/66 ,  D21H17/69

摘要： Methods for making paper with improved strength and methods for improving paper strength, using a metal chelate and an organic polymer, and improved strength paper made through these processes.

公开(公告)号：US20210221920A1

公开(公告)日：2021-07-22

申请号：US17224459

申请日：2021-04-07

申请人： FiberLean Technologies Limited

发明人： Mark Windebank ,  David Skuse ,  Madeleine Adams ,  Guillaume Tellier

IPC分类号： C08B16/00 ,  D21H17/25 ,  D21H17/69 ,  D21H19/10 ,  D21H19/38 ,  D21C9/00 ,  D21C9/18 ,  D21F3/00 ,  D21H11/18

摘要： Methods of improving the re-dispersibility of dried or at least partially dried microfibrillated cellulose, methods of re-dispersing dried or at least partially dried microfibrillated cellulose, compositions comprising re-dispersed microfibrillated cellulose and the use of re-dispersed microfibrillated cellulose in an article, product or composition; and methods of improving the physical and/or mechanical properties of re-dispersed dried or partially dried microfibrillated cellulose.

公开(公告)号：US10683613B2

公开(公告)日：2020-06-16

申请号：US14896317

申请日：2014-06-06

申请人： ImerTech SAS

发明人： Mikko Likitalo

IPC分类号： D21C9/08 ,  D21H21/02 ,  D21H17/67 ,  D21H17/69 ,  D21C9/10 ,  D21C9/16

摘要： Compositions suitable for use in the bleaching of pulps may include one or more particulate alkaline earth metal oxides or alkaline earth metal hydroxides or mixtures thereof, and one or more pitch control additives. The compositions may be suitable for use in a pulp preparation or a papermaking process. A method for the bleaching of pulps may include providing the composition.

公开(公告)号：US10323356B2

公开(公告)日：2019-06-18

申请号：US14391887

申请日：2013-04-29

申请人： Omya International AG

发明人： Armelle Senti-Wenk ,  Patrick A. C. Gane ,  Joachim Schoelkopf

IPC分类号： D21H19/54 ,  D21H19/42 ,  D21H17/00 ,  D21H19/40 ,  C04B14/28 ,  C09C1/02 ,  C04B16/00 ,  D21H17/63 ,  D21H17/69 ,  D21H19/38 ,  C08L3/08 ,  C04B103/54

摘要： The invention relates to a process for preparing self-binding pigment particle suspensions, to a self-binding pigment particle suspension as well as to a paper product comprising self-binding pigment particles and to the use of the self-binding pigment particle suspension in paper applications, such as in paper coating or as filler material.

公开(公告)号：US20190055696A1

公开(公告)日：2019-02-21

申请号：US15765137

申请日：2016-09-30

申请人： ECOLAB USA INC.

发明人： Qinglong RAO

IPC分类号： D21H17/69 ,  D21H17/67 ,  D21H17/28 ,  D21H17/29 ,  D21H17/45 ,  D21H17/43 ,  D21H17/68 ,  D21H21/18

CPC分类号： D21H17/69 ,  D21H17/28 ,  D21H17/29 ,  D21H17/37 ,  D21H17/375 ,  D21H17/43 ,  D21H17/455 ,  D21H17/67 ,  D21H17/675 ,  D21H17/68 ,  D21H17/74 ,  D21H21/18

摘要： Method of papermaking comprises: treating filler with a starch and a flocculant to form a filler floc; combining the filler floc with the cellulose fiber stock; and forming a paper mat from the combination of filler floc and cellulose fiber stock. The method have been found to result in larger particle sizes for the filler flocs, improved shear stability, and improved sheet strength in the paper mat.

公开(公告)号：US10145067B2

公开(公告)日：2018-12-04

申请号：US15271441

申请日：2016-09-21

申请人： ECOLAB USA, INC.

发明人： Yulin Zhao ,  Jun Li ,  Qing Long Rao ,  Stephen Ashton ,  Weiguo Cheng ,  Aleksandar Todorovic ,  Alan Smith

IPC分类号： D21H17/37 ,  D21H21/20 ,  D21H21/18 ,  D21H17/67 ,  D21H21/10 ,  D21C3/02 ,  D21C5/00 ,  D21C5/02 ,  D21H17/69 ,  D21H17/00 ,  D21H17/66

摘要： Methods of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength, and enhancing filler retention in a papermaking process are disclosed. The methods improve the efficiency of drainage aids, wet web strength aids, and/or wet strength aids by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives.

公开(公告)号：US20180230313A1

公开(公告)日：2018-08-16

申请号：US15951657

申请日：2018-04-12

申请人： Omya International AG

发明人： Patrick A.C. Gane ,  Matthias Buri ,  Beat Karth ,  Samuel Rentsch

IPC分类号： C09C1/02 ,  C09C3/04 ,  C09C1/04 ,  D21H17/69

CPC分类号： C09C1/021 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/22 ,  C09C1/043 ,  C09C3/041 ,  D21H17/69 ,  D21H19/42

摘要： The invention relates to a process for manufacturing aqueous mineral material suspensions or dried mineral materials using at least one lithium ion neutralised water-soluble organic polymer, the ground mineral materials obtained by this process, the use of the mineral materials in paper, paints and plastics, as well as the use of the lithium ion neutralised water-soluble organic polymer in the manufacturing process as a dispersing and/or grinding enhancer.