Abstract

A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass M w of at least 1 million, a high-consistency stock first being prepared, at least one polymer containing vinylamine units and having …

Legal parties

Party
Inventors (applicants): Rainer Blum, Joachim Kuhn, Marc Leduc, Anton Esser, Ralf Hemel
Assignees (initial): BASF SE (Ludwigshafen, DE)
Agents: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. (attorney)

The application was examined by Mark Halpern (USPTO dept. 1741), Dennis Cordray

Claims

  • 1. A process for producing paper, board or cardboard by draining a paper stock comprising …
  • 2. The process according to claim 1 , wherein the consistency of the high-consistency stock …
  • 3. The process according to claim 1 , wherein the consistency of the high-consistency stock …

International priority data

DE: 10 2004 013 007 / Mar. 16, 2004 (national)

Cited documents

Patents

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Description

Description

The present invention relates to a process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain …

Other Patent Relations

This is a continuation application of U.S. application Ser. No. 10/590,933, filed Aug. 28, 2006, which is a 371 of PCT/EP05/002685 filed on Mar. 14, …

Examples

The following polymers were used: PVAm 1: Polyvinylamine having a molar mass of 400 000 D (prepared by hydrolysis of poly-N-vinylformamide, degree of hydrolysis 95 mol %) PVAm 2: Polymer …

More details about Method for Producing Paper, Paperboard and Cardboard

Miscellaneous patent data

Particularly claims a process for producing paper, board or cardboard by draining a paper stock…, the primary classification Ester type has been designated to the document, the exemplary claims include number 1, the application number is 13/609,356 (U.S.), the grant publication number is 08486227, the application was examined by Mark Halpern, the assistant examiner Dennis Cordray (1741 USPTO department), assigned to a foreign company or corporation, the grant date is Jul. 16, 2013 (publication date), claims 1-19 comprise the invention scope, the assignee location is Ludwigshafen (DE); its organization is BASF SE, the application publication date is Sep. 11, 2012, similar patents are classified under felt structure or felt composition, Sulfur-containing compounds, Wet strength agents, Means directing stock into contact with molding surface, Details thereof, e.g. surface characteristics, peripheral speed, cutting and / or slitting, siliceous, e.g. clays, Contracting matrix, Polysaccharides, Acids, salts or esters, the known agent's organization is Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P., the published applicant's name is Joachim Kuhn, invented by Marc Leduc et al., the published inventor's name is Esser Anton, the invention is named Method for Producing Paper, Paperboard and Cardboard.

Invention classification information

The invention is classified under Synthetic resin, Polymerized unsaturated compound, Polyamides, Polyaminoamides, Polyester-amides, Nitrogen containing compound, Retention agents or drainage improvers, Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates, obtained by reactions only involving carbon-to-carbon unsaturated bonds, Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control, Non-fiber additive, Nitrogen containing, Ester type, Polyamines, Polyimines, Polyester-imides, Part added to furnish or pulp. The designated search classifications include Synthetic resin, Ester type, Nitrogen containing, Part added to furnish or pulp, Nitrogen containing compound, Polymerized unsaturated compound, Acrylamide containing, Non-fiber additive.

Patent details
Publication number 08486227
Publication date Jul. 16, 2013
Kind code B2
Application number 13/609,356
Application date Sep. 11, 2012
Application type U
Application series code 13
National classification 162/168.7
Total number of claims 19
Exemplary claims 1
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