JP2005320371A5

JP2005320371A5 -

Info

Publication number: JP2005320371A5
Application number: JP2004137497A
Authority: JP
Filing date: 2004-05-06
Publication date: 2007-06-14

Description

本発明に従えば、（ｉ）天然ゴム（ＮＲ）及びポリブタジエンゴム（ＢＲ）をＮＲ／ＢＲ（重量比）＝６０〜９５／４０〜５で含むＮＲ及びＢＲのブレンドを主体とした加硫可能なゴム１００重量部、（ｉｉ）式（Ｉ）：
Ｙ₃ＳｉＣ₃Ｈ₆ＳＣ（＝Ｏ）Ｒ（Ｉ）
（式中、Ｙはメトキシ、エトキシ、プロポキシ、イソプロポキシ又はアセトキシ基を示し、Ｒは直鎖、環式もしくは分岐アルキル基、アルケニル基、アリール基及びアラルキル基から選ばれるＣ₁〜Ｃ₁₈の炭化水素基を示す）で表される少なくとも１種のシランカップリング剤Ｘで表面処理されたシリカ５〜３０重量部並びに（ｉｉｉ）窒素吸着比表面積（Ｎ₂ＳＡ）が１１０ｍ²／ｇ以上のカーボンブラック３０〜４５重量部を含み、前記表面処理シリカとカーボンブラックとの合計４０〜６０重量部を含んでなるゴム組成物を溝深さ１６．５ｍｍ以下のキャップトレッドに使用した重荷重用空気入りタイヤが提供される。

In accordance with the present invention, (i) vulcanization based on a blend of NR and BR containing natural rubber (NR) and polybutadiene rubber (BR) at NR / BR (weight ratio) = 60 to 95/40 to 5 100 parts by weight of rubber, (ii) Formula (I):
Y ₃ SiC ₃ H ₆ SC (═O) R (I)
Wherein Y represents a methoxy, ethoxy, propoxy, isopropoxy or acetoxy group, and R represents a C _{1 to} C ₁₈ carbonized group selected from a linear, cyclic or branched alkyl group, alkenyl group, aryl group and aralkyl group. 5 to 30 parts by weight of silica surface-treated with at least one silane coupling agent X represented by (showing a hydrogen group) and (iii) carbon having a nitrogen adsorption specific surface area (N ₂ SA) of 110 m ² / g or more Heavy duty pneumatic tire using a rubber composition containing 30 to 45 parts by weight of black and a total of 40 to 60 parts by weight of the surface-treated silica and carbon black for a cap tread having a groove depth of 16.5 mm or less. Is provided.

Claims

(I) 100 weight of vulcanizable rubber mainly composed of blend of NR and BR containing natural rubber (NR) and polybutadiene rubber (BR) at NR / BR (weight) = 60-95 / 40-5 Part (ii) Formula (I):
Y ₃ SiC ₃ H ₆ SC (═O) R (I)
Wherein Y represents a methoxy, ethoxy, propoxy, isopropoxy or acetoxy group, and R represents a C _{1 to} C ₁₈ carbonized group selected from a linear, cyclic or branched alkyl group, alkenyl group, aryl group and aralkyl group. 5 to 30 parts by weight of silica surface-treated with at least one silane coupling agent X represented by (showing a hydrogen group) and (iii) carbon having a nitrogen adsorption specific surface area (N ₂ SA) of 110 m ² / g or more Heavy duty pneumatic tire using a rubber composition containing 30 to 45 parts by weight of black and a total of 40 to 60 parts by weight of the surface-treated silica and carbon black for a cap tread having a groove depth of 16.5 mm or less. .