Title:
MASTERBATCH FOR RUBBER MODIFICATION AND BRANCHED CONJUGATED DIENE POLYMER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2024/043311
Kind Code:
A1
Abstract:
In an embodiment there is provided a rubber composition comprising cellulose nanofiber and a branched conjugated diene polymer for which a shrinkage factor (g') determined by a GPC-light scattering measurement is at least 0.72, the content (ST) of aromatic vinyl monomer and proportion (CS) of a coupling polymer satisfy a prescribed relationship, and the peak top molecular weight Mp1 of a noncoupling polymer and the peak top molecular weight Mp2 of the coupling polymer satisfy a prescribed relationship. In an embodiment there is provided a masterbatch for rubber modification, comprising 100 parts by mass of a first rubber component that contains at least 50 mass% of said branched conjugated diene polymer, and 15 parts by mass to 100 parts by mass of cellulose nanofiber.
Inventors:
MATSUDA TAKAAKI (JP)
MOTOFUSA SHINICHI (JP)
OZAWA RYOSUKE (JP)
BAMBA ATSUSHI (JP)
TARUTANI ATSUYOSHI (JP)
MOTOFUSA SHINICHI (JP)
OZAWA RYOSUKE (JP)
BAMBA ATSUSHI (JP)
TARUTANI ATSUYOSHI (JP)
Application Number:
PCT/JP2023/030525
Publication Date:
February 29, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
C08L9/06; C08J3/22; C08K3/013; C08K5/05; C08L1/02; C08L7/00; C08L21/00; C08L71/02
Domestic Patent References:
| WO2018164053A1 | 2018-09-13 |
Foreign References:
| JP2021014512A | 2021-02-12 | |||
| JP2019147877A | 2019-09-05 | |||
| JP2020066700A | 2020-04-30 | |||
| JP2022047509A | 2022-03-24 | |||
| JP2020007492A | 2020-01-16 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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