Patents by Inventor Sten Frolich
Sten Frolich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7488402Abstract: The invention related to process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises adding to the suspension (i) a cationic vinyl addition polymer prepared by polymerizing one or more ethylenically unsaturated monomers comprising a cationic monomer; (ii) an anionic polymer having one or more aromatic groups selected from the group consisting of polymers obtained by condensation of formaldehyde with benzene-based and naphthalene-based compounds, polyurethanes, polysaccharides, and lignin-based polymers; wherein (i) and (ii) are separately added to the suspension; and (iii) a low molecular weight cationic organic polymer having a molecular weight in the range of from 2,000 to about 700,000; or an anionic microparticulate material; and forming and draining the obtained suspension on a wire.Type: GrantFiled: June 10, 2005Date of Patent: February 10, 2009Assignee: Akzo Nobel N.V.Inventors: Sten Frölich, Fredrik Solhage, Erik Lindgren, Hans E. Johansson-Vestin
-
Patent number: 7318881Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.Type: GrantFiled: May 10, 2004Date of Patent: January 15, 2008Assignee: Akzo Nobel N.V.Inventors: Erik Lindgren, Sten Frölich, Michael Persson, Barbro Magnusson
-
Publication number: 20050236126Abstract: The invention related to process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises adding to the suspension (i) a cationic vinyl addition polymer prepared by polymerizing one or more ethylenically unsaturated monomers comprising a cationic monomer; (ii) an anionic polymer having one or more aromatic groups selected from the group consisting of polymers obtained by condensation of formaldehyde with benzene-based and naphthalene-based compounds, polyurethanes, polysaccharides, and lignin-based polymers; wherein (i) and (ii) are separately added to the suspension; and (iii) a low molecular weight cationic organic polymer having a molecular weight in the range of from 2,000 to about 700,000; or an anionic microparticulate material; and forming and draining the obtained suspension on a wire.Type: ApplicationFiled: June 10, 2005Publication date: October 27, 2005Inventors: Sten Frolich, Fredrik Solhage, Erik Lindgren, Hans Johansson-Vestin
-
Patent number: 6918995Abstract: The invention relates to a process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises separately adding to the suspension a cationic organic polymer having one or more aromatic groups and an anionic polymer having one or more aromatic groups, the anionic polymer being selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers and modifications thereof, forming and draining the suspension on a wire, with the proviso that if the anionic polymer is a step-growth polymer it is not an anionic melamine-sulphonic acid condensation polymer.Type: GrantFiled: August 6, 2001Date of Patent: July 19, 2005Assignee: Akzo Nobel N.V.Inventors: Sten Frölich, Fredrik Solhage, Erik Lindgren, Hans E. Johansson-Vestin
-
Patent number: 6846384Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, an anionic or cationic sizing dispersion, and a sizing promoter comprising a cationic organic polymer having an aromatic group; and an anionic polymer having an aromatic group selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers, wherein the sizing dispersion and sizing promoter are added separately to the aqueous suspension.Type: GrantFiled: August 6, 2001Date of Patent: January 25, 2005Assignee: Akzo Nobel N.V.Inventors: Erik Lindgren, Sten Frölich, Michael Persson
-
Patent number: 6818100Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibres, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.Type: GrantFiled: August 6, 2001Date of Patent: November 16, 2004Assignee: Akzo Nobel N.V.Inventors: Erik Lindgren, Sten Frölich, Michael Persson, Barbro Magnusson
-
Publication number: 20040206467Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibres, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.Type: ApplicationFiled: May 10, 2004Publication date: October 21, 2004Inventors: Erik Lindgren, Sten Frolich, Michael Persson, Barbro Magnusson
-
Publication number: 20030019599Abstract: The present invention relates to an aqueous dispersion of a sizing agent comprising starch having aromatic groups and an anionic polyelectrolyte, wherein the starch has a total amount of amylose of at least about 22% by weight based on total starch.Type: ApplicationFiled: February 8, 2002Publication date: January 30, 2003Inventors: John Nicholass, Fredrik Solhage, Erik Lindgren, Sten Frolich, Michael Persson, Nicholas Morgan
-
Patent number: 6485555Abstract: The present invention relates to sizing of paper and more specifically to a substantially water-free and aqueous composition of a sizing agent where the composition contains a cellulose reactive sizing agent, a cationic compound with a molecular weight up to 10000 and a non-ionic compound. Additionally, the invention relates to the preparation and use of above-mentioned compositions.Type: GrantFiled: December 21, 2001Date of Patent: November 26, 2002Assignee: Akzo Nobel N.V.Inventors: Erik Lindgren, Sten Frölich, Rein Sikkar
-
Publication number: 20020166648Abstract: The invention relates to a process for manufacturing paper and board comprising providing a suspension comprising cellulosic fibres and at least a sizing agent, dewatering said suspension thereby forming a paper-web, whereby an aromatic-containing cationic vinyl addition polymer, and an anionic polymer having a weight average molecular weight of up to about 500,000 selected from the group consisting of vinyl addition polymers and condensation polymers is added separately to the suspension.Type: ApplicationFiled: January 31, 2002Publication date: November 14, 2002Inventors: Sten Frolich, Fredrik Solhage, Erik Lindgren, Hans Johansson-Vestin, Kjell Andersson
-
Publication number: 20020100567Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, an anionic or cationic sizing dispersion, and a sizing promoter comprising a cationic organic polymer having an aromatic group; and an anionic polymer having an aromatic group selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers, wherein the sizing dispersion and sizing promoter are added separately to the aqueous suspension.Type: ApplicationFiled: August 6, 2001Publication date: August 1, 2002Inventors: Erik Lindgren, Sten Frolich, Michael Persson
-
Publication number: 20020096290Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.Type: ApplicationFiled: August 6, 2001Publication date: July 25, 2002Inventors: Erik Lindgren, Sten Frolich, Michael Persson, Barbro Magnusson
-
Publication number: 20020096275Abstract: An aqueous dispersion of a sizing agent comprising starch having aromatic groups and a condensed sulfonate, wherein the starch contains less than 95 weight % of amylopectin.Type: ApplicationFiled: August 6, 2001Publication date: July 25, 2002Inventors: Erik Lindgren, Sten Frolich, Michael Persson, Nicholas Morgan, Ruth Dunleavey
-
Publication number: 20020096289Abstract: The invention relates to a process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises separately adding to the suspension a cationic organic polymer having one or more aromatic groups and an anionic polymer having one or more aromatic groups, the anionic polymer being selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers and modifications thereof, forming and draining the suspension on a wire, with the proviso that if the anionic polymer is a step-growth polymer it is not an anionic melamine-sulphonic acid condensation polymer.Type: ApplicationFiled: August 6, 2001Publication date: July 25, 2002Inventors: Sten Frolich, Fredrik Solhage, Erik Lindgren, Hans E. Johansson-Vestin
-
Patent number: 6306255Abstract: The invention relates to an aqueous disperion containing a cellulose-reactive sizing agent and an anionic hydrophobicailly modified cellulose-derivative, its preparation and use in the production of paper. The invention also relates to a substantially water-free composition containing a cellulose-reactive sizing agent and an anionic hydrophobicailly modified cellulose-derivative, its preparation and use in the preparation of an aqueous dispersion of cellulose-reactive sizing agent. The invention further relates to a process for sizing cellulosic fibers by addition of an aqueous sizing dispersion containing a cellulose-reactive sizing agent and a hydroically modified dispersing agent to a stock containing cellulosic fibers, and optional fillers, and dewatering the stock on a wire to obtain a web containing cellulosic fibers.Type: GrantFiled: May 15, 2000Date of Patent: October 23, 2001Assignee: Akzo Nobel NVInventors: Sten Frölich, Erik Lindgren, Rein Sikkar
-
Patent number: 6165259Abstract: The invention relates to an aqueous dispersion containing a dispersant and a disperse phase containing a hydrophobic material, the dispersant comprising an anionic compound having a molecular weight less than 50,000 and being selected from the group consisting of carbon-containing compounds and silicon-containing compounds, and a cationic organic compound having a molecular weight less than 50,000. The invention further relates to the preparation and use of the dispersion in the production of paper. The invention also relates to a substantially water-free composition containing a hydrophobic material, an anionic compound having a molecular weight less than 50,000 and being selected from carbon-containing compounds and silicon-containing compounds, and a cationic organic compound having a molecular weight less than 50,000, as well as it use in the preparation of an aqueous dispersion.Type: GrantFiled: February 3, 1998Date of Patent: December 26, 2000Assignee: Akzo Nobel N.V.Inventors: Hans Hallstrom, Sten Frolich, Erik Lindgren, Rein Sikkar
-
Patent number: 6093217Abstract: The invention relates to an aqueous dispersion containing a cellulose-reactive sizing agent and an anionic hydrophobically modified cellulose-derivative, its preparation and use in the production of paper. The invention also relates to a substantially water-free composition containing a cellulose-reactive sizing agent and an anionic hydrophobicity modified cellulose-derivative, its preparation and use in the preparation of an aqueous dispersion cellulose-reactive sizing agent. The invention further relates to a process for sizing cellulosic fibers by addition of an aqueous sizing dispersion containing a cellulose-reactive sizing agent and a hydrophobically modified dispersing agent to a stock containing cellulosic fibers, and optional fillers, and dewatering the stock on a wire to obtain a web containing cellulosic fibers.Type: GrantFiled: February 3, 1998Date of Patent: July 25, 2000Assignee: Akzo Nobel N.V.Inventors: Sten Frolich, Erik Lindgren, Rein Sikkar
-
Patent number: 5969011Abstract: The invention relates to an aqueous dispersion containing a cellulose-reactive sizing agent and a dispersant system comprising a low molecular weight cationic organic compound having a molecular weight less than 10,000 and an anionic stabilizer, its preparation and use in the production of paper. The invention further relates to a substantially water-free composition containing a cellulose-reactive sizing agent, a low molecular weight cationic organic compound having a molecular weight less than 10,000 and an anionic stabilizer, its preparation and use in the preparation of an aqueous dispersion of cellulose-reactive sizing agent.Type: GrantFiled: February 3, 1998Date of Patent: October 19, 1999Assignee: Akzo Nobel nvInventors: Sten Frolich, Erik Lindgren, Rein Sikkar