Patents by Inventor Mari Ojanen

Mari Ojanen 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: 12163289
    Abstract: A coating structure for a sheet-like substrate is disclosed including cellulosic fibres and a sheet-like product. The structure includes at least one pre-coat layer and a top coat layer, where the pre-coat layer(s) and the top coat layer include 10-90 weight-% of a styrene (meth)acrylate copolymer which is polymerised in the presence of a stabiliser, and which has a glass transition temperature Tg?20° C., preferably ?15° C., more preferably ?13° C. Furthermore, the pre-coat layer(s) includes a polysaccharide, such as starch, and the top coat layer includes 5-60 weight-% of at least one water-soluble coating binder, which is selected from polysaccharides and polyvinyl alcohols, as well as at most 5.0 weight-% of a cross-linker, which reacts with —OH or —COOH groups.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: December 10, 2024
    Assignee: Kemira Oyj
    Inventors: Tarja Turkki, Sami Puttonen, Helena Peuranen, Mari Ojanen, Erland Hermansson, Anneli Lepo
  • Patent number: 11525218
    Abstract: A barrier coating composition is disclosed including 30-70 weight-% of a styrene (meth)acrylate copolymer, polymerised in the presence of a stabiliser, and the styrene (meth)acrylate copolymer having a glass transition temperature Tg?20° C., preferably ?10° C., 30-70 weight-% of a polyvinyl alcohol, and at most 5.0 weight-% of a cross-linker, reacting with —OH or —COOH groups. Further disclosed is a sheet-like product coated with the coating composition.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: December 13, 2022
    Assignee: Kemira Oyj
    Inventors: Helena Peuranen, Sami Puttonen, Tarja Turkki, Mari Ojanen, Erland Hermansson
  • Publication number: 20210214894
    Abstract: A coating structure for a sheet-like substrate is disclosed including cellulosic fibres and a sheet-like product. The structure includes at least one pre-coat layer and a top coat layer, where the pre-coat layer(s) and the top coat layer include 10-90 weight-% of a styrene (meth)acrylate copolymer which is polymerised in the presence of a stabiliser, and which has a glass transition temperature Tg?20° C., preferably ?15° C., more preferably ?13° C. Furthermore, the pre-coat layer(s) includes a polysaccharide, such as starch, and the top coat layer includes 5-60 weight-% of at least one water-soluble coating binder, which is selected from polysaccharides and polyvinyl alcohols, as well as at most 5.0 weight-% of a cross-linker, which reacts with —OH or —COOH groups.
    Type: Application
    Filed: June 19, 2019
    Publication date: July 15, 2021
    Applicant: Kemira Oyj
    Inventors: Tarja TURKKI, Sami PUTTONEN, Helena PEURANEN, Mari OJANEN, Erland HERMANSSON
  • Publication number: 20200095732
    Abstract: A barrier coating composition is disclosed including 30-70 weight-% of a styrene (meth)acrylate copolymer, polymerised in the presence of a stabiliser, and the styrene (meth)acrylate copolymer having a glass transition temperature Tg?20° C., preferably ?10° C., 30-70 weight-% of a polyvinyl alcohol, and at most 5.0 weight-% of a cross-linker, reacting with —OH or —COOH groups. Further disclosed is a sheet-like product coated with the coating composition.
    Type: Application
    Filed: June 14, 2018
    Publication date: March 26, 2020
    Applicant: Kemira Oyj
    Inventors: Helena PEURANEN, Sami PUTTONEN, Tarja TURKKI, Mari OJANEN, Erland HERMANSSON
  • Publication number: 20120050392
    Abstract: The invention relates to an inkjet recording sheet and use of a composition for improving inkjet printing properties of an inkjet recording sheet comprising wood or lignocellulosic fibre material. According to the invention the composition comprises calcium sulphate dihydrate and starch solution.
    Type: Application
    Filed: May 11, 2010
    Publication date: March 1, 2012
    Inventors: Sami Puttonen, Mari Ojanen, Kimmo Huhtala
  • Publication number: 20110224348
    Abstract: A process for preparing a dry coating composition for paper and board includes mixing at least one pigment and at least one binder and pulverizing the obtained mixture, and wherein 25% to 100% of the pigment has particle size D90 from 10 ?m to 50 ?m before mixing with the binder. Also described is the use of pigments having a particle size D90 from 10 ?m to 50 ?m in the production of pulverized dry coating composition for paper and board for improving the surface strength of a coating, which is made by dry coating a paper or board with the dry coating composition.
    Type: Application
    Filed: November 23, 2009
    Publication date: September 15, 2011
    Applicant: KEMIRA OYJ
    Inventors: Esko Aarni, Vesa Nuutinen, Mari Ojanen
  • Publication number: 20100239763
    Abstract: A method for manufacturing paper. A base paper having a first side and a second side is treated, on at least the first side, to a roughness level of Bendtsen roughness from 30 to 500 ml/min. The first side of the base paper is provided with a barrier layer by a contactless method so that the water vapour permeability of the paper is not greater than 10 g/m2/24 h.
    Type: Application
    Filed: June 2, 2008
    Publication date: September 23, 2010
    Inventors: Lars Åsmus, Leena Kunnas, Tarja Sinkko, Tuomo Pappila, Mari Ojanen