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1. (WO2017018386) RUBBER COMPOSITION

Pub. No.:    WO/2017/018386    International Application No.:    PCT/JP2016/071750
Publication Date: Fri Feb 03 00:59:59 CET 2017 International Filing Date: Tue Jul 26 01:59:59 CEST 2016
IPC: C08L 21/00
B29C 33/02
B60C 5/14
C08K 3/04
C08K 3/22
C08L 23/22
C08L 23/28
C08L 45/00
Applicants: SUMITOMO RUBBER INDUSTRIES, LTD.
住友ゴム工業株式会社
Inventors: MIYAZAKI, Tatsuya
宮崎 達也
Title: RUBBER COMPOSITION
Abstract:
As a result of the present invention, a rubber composition, a pneumatic tire having an inner liner comprising said rubber composition, and a vulcanizing bladder can be provided, said rubber composition having excellent air permeation resistance, molding workability, and durability. This rubber composition: contains a rubber component and a terpene-based resin having a glass transition temperature of no more than 60°C; and has an air-blocking index of at least 110 as indicated by formula (1). The pneumatic tire has an inner liner comprising this rubber composition and the tire vulcanizing bladder comprises this rubber composition. Formula (1): (air-blocking index) = (amount of air transmission for rubber composition in comparative example 1) / (amount of air transmission for rubber composition) × 100