Patents Assigned to Raisio Chemicals Ltd.
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Publication number: 20040226675Abstract: The printability and coatability of calendered paper and board is improved by adding a polysaccharide and, as a hydrophobic agent, at least one polymer dispersion comprising at least one dispersed polymer obtained from monomers comprising hydrophobic monomers to the fiber stock in the production of said paper or board.Type: ApplicationFiled: April 30, 2004Publication date: November 18, 2004Applicant: Raisio Chemicals LTD.Inventors: Olof Malmstrom, Mari Niinikoski, Kenneth Sundberg
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Publication number: 20040144512Abstract: The object of the present invention is an additive composition for paper making which is added to the pulp prior to web formation in order to increase the wet strength of the web. The basic component of the composition is a component made from starch, which to its molecular weight has been thinned to a viscosity level of 10 to 400 (5%, 60° C.Type: ApplicationFiled: April 7, 2003Publication date: July 29, 2004Applicant: Raisio Chemicals LTDInventor: Kari Luukkonen
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Patent number: 6753377Abstract: The invention relates to a starch-based polymer dispersion, which contains a copolymer of starch with monomers. The invention also relates to a process for the preparation of said dispersion and its use as a surface sizing additive for paper and as a wet- and dry-strengthener for paper which is added to the wet end of the paper machine.Type: GrantFiled: August 6, 2001Date of Patent: June 22, 2004Assignee: Raisio Chemicals, Ltd.Inventors: Mari Niinikoski, Kari Nurmi, Anna-Liisa Tammi
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Patent number: 6749722Abstract: The present invention relates to a method of manufacturing a paper of multi-color ink-jet printable grade. A proper hydrophicity for the paper is secured by using an 2-oxetanone size in the appropriate sizing steps. The size is made from non-branched and branched-chain fatty acids having main chain comprising 6-22 carbons linked with each other by saturated bonds.Type: GrantFiled: July 2, 2001Date of Patent: June 15, 2004Assignee: Raisio Chemicals Ltd.Inventors: Olof Malmström, Markku Nurminen, Raija Savolainen, Ari Teijo, Claes Zetter
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Patent number: 6716313Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 meq/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.Type: GrantFiled: April 30, 2002Date of Patent: April 6, 2004Assignee: Raisio Chemicals, Ltd.Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara
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Publication number: 20040023004Abstract: A size composition for the surface sizing of paper, board or other suchlike. The size composition comprises a size fraction which comprises a water-soluble, principal component made up of, for example, starch, polyvinyl alcohol, carboxymethyl cellulose, glucomannan, protein, or mixtures thereof, and a pigment fraction formed by mixing together a mineral material, which in the main comprises talc particles and/or other phyllosilicate particles, and a binder such as a synthetic polymer, latex and/or other corresponding binder. The size composition is prepared by mixing together the said size fraction and pigment fraction.Type: ApplicationFiled: July 29, 2003Publication date: February 5, 2004Applicant: RAISIO CHEMICALS LTD.Inventors: Tomi Kimpimaki, Mari Niinikoski (nee Lindstrom), Kari Nurmi
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Patent number: 6670470Abstract: The present invention relates to a process for the preparation of a stable, chlorine free modified starch which is useful in paper coating and sizing. In the process, starch is degraded by catalyzed hydrogen peroxide oxydation, and stabilized by acetyl esterification, combined with crosslinking of the starch.Type: GrantFiled: March 10, 2000Date of Patent: December 30, 2003Assignee: Raisio Chemicals Ltd.Inventors: Hannu Ketola, Peggy Hagberg
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Patent number: 6398912Abstract: The object of the invention is an additive for paper making by means of which the dusting tendency of paper can be reduced. The agent is based on starch, the molecular size of which has been reduced, and which has been cationized to a charge of less than 1.5 mEkv/g with a quaternary nitrogen compound. The agent is added to the fiber pulp for paper making prior to web formation.Type: GrantFiled: January 9, 2001Date of Patent: June 4, 2002Assignee: Raisio Chemicals Ltd.Inventors: Tapio Vihervaara, Kari Luukkonen, Veikko Niinivaara
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Publication number: 20010003760Abstract: The object of the present invention is an additive composition for paper making which is added to the pulp prior to web formation in order to increase the wet strength of the web. The basic component of the composition is a component made from starch, which to its molecular weight has been thinned to a viscosity level of 10 to 400 (5%, 60° C.Type: ApplicationFiled: January 10, 2001Publication date: June 14, 2001Applicant: RAISIO CHEMICALS LTD.Inventor: Kari Luukkonen