Title:
RUBBER COMPOSITION FOR STUDLESS TIRES
Document Type and Number:
Japanese Patent JP2023119108
Kind Code:
A
Abstract:
To provide a rubber composition for studless tires which improves on-ice performance and wear resistance.SOLUTION: The rubber composition for studless tires contains 10-30 pts.mass of thermally expandable microcapsules based on 100 pts.mass of a diene rubber. An outer shell constituting the thermally expandable microcapsules comprises a thermoplastic resin being a polymer of a polymerizable component containing a monofunctional monomer (A) and a polyfunctional monomer (B). The monofunctional monomer (A) contains a nitrile-based monomer and a carboxyl group-containing monomer. The polyfunctional monomer (B) has two or more (meth)acryloyl groups and a reactive carbon-carbon double bond other than the (meth)acryloyl groups, is represented by general formula: R1-O-R2-O-R3 (where R1 and R3 are each a (meth)acryloyl group; and R2 is a structure containing a polymer chain having a reactive carbon-carbon double bond), and has a weight average molecular weight of 500-50,000.SELECTED DRAWING: None
Inventors:
NAKAGAWA RYUTARO
KITA YU
KITA YU
Application Number:
JP2022021770A
Publication Date:
August 28, 2023
Filing Date:
February 16, 2022
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD
MATSUMOTO YUSHI SEIYAKU KK
MATSUMOTO YUSHI SEIYAKU KK
International Classes:
C08L9/00; B60C1/00; C08K9/10; C08L7/00; C08L15/00; C08L45/00
Attorney, Agent or Firm:
Clear stream international patent attorney corporation
Takayoshi in the daytime
Masao Sakaizawa
Takayoshi in the daytime
Masao Sakaizawa