Basf Se Corporation

Basf Aktiengesellschaft

Solenis Technologies, L.p.

Other

Omya International Ag

Solenis Technologies Cayman, L.p.

Anton Esser

Hans-Joachim Haehnle

Rainer Blum

Joerg Nieberle

Ralph Isermann

Josef Neutzner

Jacques Dupuis

Christoph Hamers

Norbert Mahr

Marc Schroeder

Hubert Meixner

Juergen Schmidt-Thuemmes

Volker Braig

Martin Wendker

Marc Leduc

Ralf Hemel

Christopher Alan Gray

Peter Baumann

Frans De Bruyn

Joachim Kuhn

Rainer Dyllick-Brenzinger

Friedrich Linhart

Roland Ettl

Kevin Ray Anderson

Manfred Niessner

Andreas Stange

Ulrich Steuerle

Frank Runge

Martin Ruebenacker

Lawrence Edward Fosdick

Klaus Lorenz

Hans-Joachim Hähnle

Martin Aus Dem Kahmen

Ki-Oh Hwang

J&uuml;rgen Decker

John Thomas McDonald, Jr

Norbert Schall

Hans-Peter Kaub

Detlef Kannengiesser

Berthold Sturm

Kai Pahnke

Rainer Scholz

Martin Rübenacker

Tibor Adalbert Von Vadkerthy

Martin Gercke

Dogan Sahin Sivasligil

Sarah Veelaert

Matthias H&ouml;ne

Emil Zurl

Jörg Nieberle

Jaroslav Aubrecht

Jürgen Schmidt-Thümmes

Jurgen Schmidt-Thuemmes

Methods for producing final polymer A are provided that comprise the following steps: Certain final polymers A obtained are useful for a method for producing paper or cardboard comprising adding certain final polymers A to a first aqueous pulp suspension, dewatering the obtained second aqueous pulp suspension containing certain final polymers A on a water-permeable substrate to a wet paper structure, and further dewatering of the wet paper structure into a paper or cardboard.

Method for the hydrolysis of a polymer

Methods for producing paper or cardboard are provided that comprise the steps

Method for producing paper or cardboard

A method for producing dried multilayer paper is provided comprising dewatering a first aqueous fibrous suspension, thereby creating a first fibrous web; dewatering a second aqueous fibrous suspension, thereby creating a second fibrous web; spraying one or more of a first fibrous web and a second fibrous web with a spray solution or spray suspension, thereby producing at least one sprayed fibrous web; assembling the first fibrous web with the second fibrous web; dehydrating the resulting layer compound by pressing; then dehydrating by supplying heat, which creates the dried multilayer paper. The spray solution or spray suspension contains water and at least one water-soluble polymer P. The polymer P is obtained by polymerizing: 40 to 85 mol % of a monomer of Formula I in which R=H or C-C-Alkyl; and 15 to 60 mol % of one or more ethylenically unsaturated monomers.

Method for producing multi-layer paper

A method to produce dried single-layer or multi-layer paper is disclosed. The method comprises, for a single-layer paper, preparing and spraying a partially dehydrated first fibrous web with a spray solution or suspension to give a sprayed partially dehydrated first fibrous web, and dehydrating the sprayed partially dehydrated first fibrous web by applying heat to form a dried single-layer paper; or, for a multi-layer paper, preparing and spraying a partially dehydrated layer compound with a spray solution or suspension to form a sprayed layer compound, and dehydrating the sprayed layer compound by applying heat to form a dried multi-layer paper. The spray solution or suspension comprises water and at least one water-soluble polymer P, which is obtained by polymerizing: (i) a monomer of formula HCCHNHC(0)R, where Ris H or C-C- alkyl; and (ii) one or more ethylenically unsaturated monomers different from monomer (i).

Method for producing single-layer or multi-layer paper

A method for the production of paper or cardboard is provide comprising the following steps: 

Method for manufacturing paper or cardboard

A method of producing paper and board by using at least one water-soluble amphoteric polymer is provided. The water-soluble amphoteric polymer is obtained by copolymerizing a monomer mixture containing a) at least one N-vinylcarboxamide, b) at least one monoethylenically unsaturated monomer having at least one free acid group or at least one acid group in salt form, c) optionally at least one monoethylenically unsaturated monomer other than components (a) and (b), and d) optionally at least one compound having two or more ethylenically unsaturated double bonds, and then partly or wholly hydrolyzing the &#x2014;CO&#x2014;Rgroups of the polymer. The cationic monomer units and the anionic monomer units differ in their respective molar fractions, each based on the total number of moles of all monomer units, by not more than 10 mol % in absolute terms.

Method for producing paper

The present invention relates to a process for producing paper, card and board. The present invention is based on the discovery that controlling solids content during the process in a specified manner provide enhanced initial web strength of the paper prior to drying and allows for higher machine speeds in the paper production process as compared to known processes.

Production of paper, card and board

Process for the production of paper, board and cardboard having high dry strength by addition of an aqueous composition comprising a nanocellulose and at least one polymer selected from the group consisting of the anionic polymers and water-soluble cationic polymers, draining of the paper stock and drying of the paper products.

Method for producing paper, paperboard and cardboard having high dry strength

The present invention relates to a process for production of paper, card and board comprising draining a filler-containing paper stock comprising at least one water-soluble polymer with sheet formation in the wire section and then pressing the paper in the press section, wherein a paper stock having a fibrous concentration in the range from 20 to 40 g/l has the at least one water-soluble polymer added to it, then the paper stock is diluted to a fibrous concentration in the range from 5 to 15 g/l, the diluted paper stock is drained to form a sheet and the sheet is pressed in the press section to a solids content G(x) wt % or greater and G(x) computes according to()=48+(&#x2212;15)&#xb7;0.4

A process for producing paper, board and cardboard in the presence of an aqueous slurry of components comprising finely divided fillers coated at least partly with water-soluble amphoteric copolymers, which involves adding, further to the aqueous slurry of components comprising finely divided fillers, at least one cationic and/or amphoteric polymer comprising as structural element no esters of unsaturated carboxylic acids with quaternized amino alcohols to the fiber suspension prior to sheet forming.

Papers with a high filler material content and high dry strength

The invention relates to a process for the production of paper, card and board, including the steps of draining a filler-containing paper stock, having a certain fibrous concentration and containing at least one water-soluble amphoteric copolymer, with sheet formation in a wire section, then pressing the paper in a press section, diluting the paper stock to a fibrous concentration in the range from 5 to 15 g/l, draining the diluted paper stock to form a sheet, and then pressing the sheet in the press section to a solids content G(x) wt % or greater, such that G(x) computes according to:()=48+(&#x2212;15)&#xb7;0.4,where x is the numerical value of a filler content of the dry paper, card or board (in wt %), and G(x) is a numerical value of the minimal solids content (in wt %) to which the sheet is pressed.

Aqueous slurries of finely divided fillers which are at least partly covered by anionic latices, the slurries being obtainable by treating aqueous slurries of finely divided fillers with at least one anionic latex with a glass transition temperature of &#x2212;5 to &#x2212;50&#xb0; C., preparation of the aqueous slurries and their use as an additive to the paper stock in the production of filler-containing paper, filler-containing cardboard or filler-containing board by draining the paper stock.

Aqueous suspensions of fine-particulate fillers, method for the manufacture thereof and use thereof for the manufacture of filler-containing papers

Process for the production of paper, board and cardboard having high dry strength by separate addition of a water-soluble cationic polymer and of an aqueous dispersion of a water-insoluble polymer having a content of acid groups of not more than 10 mol % or of an aqueous dispersion of a nonionic polymer, which dispersion has been made anionic, to a paper stock, draining of the paper stock and drying of the paper products. Preferably, the polymers are added to a paper stock which has a temperature of at least 40&#xb0; C.

Process for the production of paper, board and cardboard having high dry strength

Process for the production of paper, board and cardboard having high dry strength by addition of a water-soluble cationic polymer and of an anionic polymer to a paper stock, draining of the paper stock and drying of the paper products, wherein an aqueous dispersion of at least one anionic latex and at least one degraded starch is used as the anionic polymer.

Method for producing paper, card and board with high dry strength

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Limburgerhof, Germany

Anton Esser