Title:
MASTERBATCH, RUBBER COMPOSITION, AND PRODUCTION METHODS FOR BOTH
Document Type and Number:
WIPO Patent Application WO/2018/199191
Kind Code:
A1
Abstract:
In order to provide a rubber composition which contains cellulose nanofibers and is excellent in terms of strength including rupture strength, a method for producing a masterbatch is provided, the method comprising: (1) a step in which a pulp B is prepared, the pulp B having been produced from a raw wood material which, when pulped under the kraft pulp production conditions of an active-alkali addition amount of 15%, a degree of sulfurization of 25%, a liquid ratio of 2.5 L/kg, and an H-factor of 830, gives a pulp A having a fiber length distribution in which the proportion of fibers each having a length of 1.00 mm or longer as measured in accordance with ISO 16065-2 is 20% or less; (2) a step in which the pulp B is fibrillated to obtain cellulose nanofibers having a length-weighted mean fiber length of 500 nm or less and a length-weighted mean fiber diameter of 100 nm or less; and (3) a step in which the cellulose nanofibers are mixed with a rubber ingredient.
Inventors:
MORITA MASAHIRO (JP)
ITO KOTARO (JP)
YASUKAWA YUSUKE (JP)
ITO KOTARO (JP)
YASUKAWA YUSUKE (JP)
Application Number:
PCT/JP2018/016875
Publication Date:
November 01, 2018
Filing Date:
April 25, 2018
Export Citation:
Assignee:
JUJO PAPER CO LTD (JP)
International Classes:
C08J3/22; C08L1/02; C08L21/00
Domestic Patent References:
| WO2016136453A1 | 2016-09-01 | |||
| WO2011118748A1 | 2011-09-29 | |||
| WO2015068818A1 | 2015-05-14 |
Foreign References:
| JP2014141637A | 2014-08-07 | |||
| JP2013018918A | 2013-01-31 | |||
| JP2012207133A | 2012-10-25 | |||
| JP2012046846A | 2012-03-08 | |||
| JP2011236398A | 2011-11-24 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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