Title:
GRAFT POLYMER, METHOD FOR PRODUCING GRAFT POLYMER, RUBBER COMPOSITION, AND TIRE
Document Type and Number:
Japanese Patent JP2021175772
Kind Code:
A
Abstract:
To provide a copolymer which is excellent in ozone resistance and can improve crack growth resistance of a rubber composition by being blended into the rubber composition.SOLUTION: A graft polymer comprises a backbone polymer moiety and a branch polymer moiety bonded to the backbone polymer moiety. The backbone polymer moiety contains a non-conjugated olefin unit and an aromatic vinyl unit. At least a part of the aromatic vinyl unit is derived from an aromatic vinyl compound having one or more alkyl groups bonded to an aromatic ring. The branch polymer moiety contains a conjugated diene unit. The ratio (backbone polymer moiety/branch polymer moiety) of the backbone polymer moiety to the branch polymer moiety is 50/50-90/10 by mass%.SELECTED DRAWING: None
Inventors:
TARDIF OLIVIER
KOTANI KYOHEI
TANAKA TAKASHI
KOTANI KYOHEI
TANAKA TAKASHI
Application Number:
JP2020081399A
Publication Date:
November 04, 2021
Filing Date:
May 01, 2020
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
C08F255/00; B60C1/00; C08F255/02; C08L51/06
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Kazuyuki Tomita
Mitsutsugu Sugimura
Kazuyuki Tomita