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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10030335 B1

PDFFull Text
Date of Patent:
Jul. 24, 2018

Filed:

Dec. 17, 2014

Filler aggregate composition and its production

Applicant:

Kemira Oyj, Helsinki, FI;

Inventors:

Matti Hietaniemi, Espoo, FI;

Mikko Virtanen, Helsinki, FI;

Assignee:

KEMIRA OYJ, Helsinki, FI;

Attorneys:

Nath, Goldberg & Meyer

Joshua B. Goldberg

Tanya E. Harkins

Primary Examiner:

Mark Halpern

Int. Cl.
CPC ...
D21H 17/37 (2006.01); D21H 11/18 (2006.01); C09C 1/02 (2006.01); D21H 17/67 (2006.01); D21H 17/69 (2006.01); D21H 21/18 (2006.01); D21H 17/25 (2006.01); D21H 17/56 (2006.01); C08L 1/02 (2006.01); C08L 33/26 (2006.01); C08L 39/02 (2006.01); D21H 17/34 (2006.01);
U.S. Cl.
CPC ...
D21H 11/18 (2013.01); C08L 1/02 (2013.01); C08L 33/26 (2013.01); C08L 39/02 (2013.01); C09C 1/021 (2013.01); D21H 17/25 (2013.01); D21H 17/34 (2013.01); D21H 17/375 (2013.01); D21H 17/56 (2013.01); D21H 17/67 (2013.01); D21H 17/675 (2013.01); D21H 17/69 (2013.01); D21H 21/18 (2013.01); C01P 2006/22 (2013.01); C01P 2006/60 (2013.01);
Abstract

The present invention relates to a filler aggregate composition comprising filler particles of ground calcium carbonate (GCC); a pretreatment agent selected from polyvinylamine (PVAM) and cationic polyacrylamide (CPAM), or a mixture thereof; and a nanofibrillar cellulose (NFC); wherein said filler aggregate composition is in the form of a slurry, wherein said pretreatment agent has an average molecular weight below 6000000 g/mol and a has a charge density below 7 meq/g, determined at pH 7, and the nanofibrillar cellulose is present in an amount of about 0.1-40% of the dry weight of the filler particles. Further it also relates to its method of production, and its use in stocks, paper and paper board.

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