JP2008231416A5

JP2008231416A5 -

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Publication number: JP2008231416A5
Application number: JP2008039421A
Authority: JP
Filing date: 2008-02-20
Publication date: 2011-03-31

Description

[式中Ｒ¹³は炭素数１〜２０の直鎖もしくは、分岐、環状のアルキル基であり、Ｇはそれぞれ独立して炭素数１〜９のアルカンジイル基又はアルケンジイル基であり、Ｚ^aはそれぞれ独立して二つの珪素原子と結合することのできる基で、[−Ｏ−]_0.5、[−Ｏ−Ｇ−]_0.5又は[−Ｏ−Ｇ−Ｏ−]_0.5から選ばれる基であり、Ｚ^bはそれぞれ独立して二つの珪素原子と結合することのできる基で、 [−Ｏ−Ｇ−Ｏ−]_0.5で表される官能基であり、Ｚ^cはそれぞれ独立して−Ｃｌ、−Ｂｒ、−ＯＲ¹⁴、Ｒ¹⁴Ｃ(＝Ｏ)Ｏ−、Ｒ¹⁴Ｒ¹⁵Ｃ＝ＮＯ−、Ｒ¹⁴Ｒ¹⁵Ｎ−，Ｒ¹⁴−，ＨＯ−Ｇ−Ｏ−で表される官能基であり、Ｒ，Ｇは上記表記と一致する。
ｍ、ｎ、ｕ、ｖ、ｗはそれぞれ独立して１≦ｍ≦２０、０≦ｎ≦２０、０≦ｕ≦３、０≦ｖ≦２、０＜ｗ≦１であり、かつ（ｕ／２）＋ｖ＋２ｗ＝２又は３である。
A部が複数である場合、複数のＡ部におけるＺ^a _u、Ｚ^b _v及びＺ^c _wそれぞれにおいて、同一でも異なっていてもよく、Ｂが複数である場合、複数のＢ部におけるＺ^a _u、Ｚ^b _v及びＺ^c _wそれぞれにおいて、同一でも異なってもよい。]で表されるシランカップリング剤であることを特徴とする上記［１］又は［２］のゴム組成物。
［４］前記無機充填材がシリカである上記［１］〜［３］いずれかのゴム組成物、
［５］前記（Ｃ）成分が、化学式（IV）、 [Wherein R ¹³ is or straight chain having 1 to 20 carbon atoms, branched or cyclic alkyl group, G is independently an alkanediyl group or an alkenediyl group having 1 to 9 carbon atoms, Z ^a are each independently a group capable of binding with two silicon _{atoms, [- O-] 0.5, [} - O-G-] is a group selected from _0.5, or _{[-O-G-O-] 0.5} , Z ^b is a group that can independently bond to two silicon atoms, and is a functional group represented by [—O—G—O—] _0.5 , and Z ^c is independently —Cl, —Br , —OR ¹⁴ , R ¹⁴ C (═O) O—, R ¹⁴ R ¹⁵ C═NO—, R ¹⁴ R ¹⁵ N—, R ¹⁴ —, HO—G—O—, R and G coincide with the above notation.
m, n, u, v, and w are independently 1 ≦ m ≦ 20, 0 ≦ n ≦ 20, 0 ≦ u ≦ 3, 0 ≦ v ≦ 2, 0 <w ≦ 1, and (u / 2) + v + 2w = 2 or 3.
When there are a plurality of parts A, each of Z ^a _u , Z ^b _v and Z ^c _w in the plurality of A parts may be the same or different, and when there are a plurality of B parts, Z ^a _u in the plurality of B parts , Z ^b _v and Z ^c _w may be the same or different. The rubber composition according to the above [1] or [2], which is a silane coupling agent represented by the formula:
[4] The rubber composition according to any one of [1] to [3], wherein the inorganic filler is silica.
[5] before SL (C) component, the formula (IV),

［式中Ｌはそれぞれ独立して炭素数１〜９のアルカンジイル基又はアルケンジイル基である。］で表される少なくとも１種のシランカップリング剤である上記［１］、［２］又は［４］のゴム組成物、
［６］（Ａ）ゴム成分１００質量部に対し、（Ｂ）充填材４０〜７０質量部を含む上記［１］〜［５］いずれかのゴム組成物、
［７］（Ａ）ゴム成分が、（Ａ−１）変性共役ジエン系重合体３０〜７０質量％を含有する上記［１］〜［６］いずれかのゴム組成物、
［８］（Ｃ）成分を１〜３質量％を含む上記［１］〜［７］いずれかのゴム組成物、
［９］（Ａ−１）変性共役ジエン系重合体が、変性芳香族ビニル−共役ジエン共重合体である上記［１］〜［８］いずれかのゴム組成物、
［１０］上記［１］〜［９］いずれかのゴム組成物を、トレッドに用いたことを特徴とする空気入りタイヤ、
［１１］乗用車、小型トラック及び小型バスに装着されるものである上記［１０］の空気入りタイヤ、及び
［１２］ＪＡＴＭＡ規格に基づくプライレーティングが６〜１０ＰＲである上記［１１］の空気入りタイヤ、
を提供するものである。 [In the formula, each L is independently an alkanediyl or alkenediyl group having 1 to 9 carbon atoms. ] The rubber composition according to the above [1], [2] or [4 ], which is at least one silane coupling agent represented by
[6] (A) The rubber composition according to any one of the above [1] to [5], comprising 40 to 70 parts by mass of a filler relative to 100 parts by mass of the rubber component,
[7] The rubber composition according to any one of the above [1] to [6], wherein (A) the rubber component contains (A-1) 30 to 70% by mass of the modified conjugated diene polymer.
[8] The rubber composition according to any one of the above [1] to [7], comprising 1 to 3% by mass of the component (C),
[9] (A-1) The rubber composition according to any one of the above [1] to [8], wherein the modified conjugated diene polymer is a modified aromatic vinyl-conjugated diene copolymer,
[10] A pneumatic tire characterized by using the rubber composition of any one of [1] to [9] in a tread,
[11] The pneumatic tire according to [10], which is mounted on a passenger car, a small truck and a small bus, and [12] The pneumatic tire according to [11], wherein the ply rating based on JATMA is 6 to 10 PR. ,
Is to provide.

[式中Ｒ¹³は炭素数１〜２０の直鎖もしくは、分岐、環状のアルキル基であり、Ｇはそれぞれ独立して炭素数１〜９のアルカンジイル基又はアルケンジイル基であり、Ｚ^aはそれぞれ独立して二つの珪素原子と結合することのできる基で、 [−０−]_0.5、[−０−Ｇ−]_0.5又は[−Ｏ−Ｇ−Ｏ−]_0.5から選ばれる基であり、Ｚ^bはそれぞれ独立して二つの珪素原子と結合することのできる基で、 [−Ｏ−Ｇ−Ｏ−]_0.5で表される官能基であり、Ｚ^cはそれぞれ独立して−Ｃｌ、−Ｂｒ、−ＯＲ¹⁴、Ｒ¹⁴Ｃ(＝Ｏ)Ｏ−、Ｒ¹⁴Ｒ¹⁵Ｃ＝ＮＯ−、Ｒ¹⁴Ｒ¹⁵Ｎ−，Ｒ¹⁴−，ＨＯ−Ｇ−Ｏ−で表される官能基であり、Ｒ，Ｇは上記表記と一致する。
ｍ、ｎ、ｕ、ｖ、ｗはそれぞれ独立して１≦ｍ≦２０、０≦ｎ≦２０、０≦ｕ≦３、０≦ｖ≦２、０＜ｗ≦１であり、かつ（ｕ／２）＋ｖ＋２ｗ＝２又は３である。
A部が複数である場合、複数のＡ部におけるＺ^a _u、Ｚ^b _v及びＺ^c _wそれぞれにおいて、同一でも異なっていてもよく、Ｂが複数である場合、複数のＢ部におけるＺ^a _u、Ｚ^b _v及びＺ^c _wそれぞれにおいて、同一でも異なってもよい。]で表されるシランカップリング剤が用いられる。 [Wherein R ¹³ is or straight chain having 1 to 20 carbon atoms, branched or cyclic alkyl group, G is independently an alkanediyl group or an alkenediyl group having 1 to 9 carbon atoms, Z ^a are each A group capable of independently bonding to two silicon atoms, a group selected from [−0−] _0.5 , [−0−G−] _0.5 or [—O—G—O—] _0.5 ; ^b is a group that can independently bond to two silicon atoms, and is a functional group represented by [—O—G—O—] _0.5 , and Z ^c is independently —Cl, —Br , —OR ¹⁴ , R ¹⁴ C (═O) O—, R ¹⁴ R ¹⁵ C═NO—, R ¹⁴ R ¹⁵ N—, R ¹⁴ —, HO—G—O—, R and G coincide with the above notation.
m, n, u, v, and w are independently 1 ≦ m ≦ 20, 0 ≦ n ≦ 20, 0 ≦ u ≦ 3, 0 ≦ v ≦ 2, 0 <w ≦ 1, and (u / 2) + v + 2w = 2 or 3.
When there are a plurality of parts A, each of Z ^a _u , Z ^b _v and Z ^c _w in the plurality of A parts may be the same or different, and when there are a plurality of B parts, Z ^a _u in the plurality of B parts , Z ^b _v and Z ^c _w may be the same or different. The silane coupling agent represented by this is used.

上記（Ｃ）成分のシランカップリング剤としては、以下の化学式（IV）、 As the silane coupling agent of the component (C) , the following chemical formula (IV),

Claims

(A) (A-1) At the polymerization active terminal of the conjugated diene polymer, the general formula (I)

[Wherein, R ¹ and R ² are each independently a monovalent hydrocarbon group having 1 to 18 carbon atoms, A ¹ is a divalent hydrocarbon group having 1 to 20 carbon atoms, and R ³ and R ⁴ are Each independently a hydrogen atom, or a monovalent hydrocarbon group having 1 to 18 carbon atoms which may have an unsubstituted or substituted amino group and / or an ether group, n represents an integer of 1 to 3, R ¹ If O is more, each R ¹ O may be the same or different, when R ² are a plurality, each R ² may be the same or different from each other. R ³ and R ⁴ may be bonded to each other to form a ring structure. 10 to 90% by mass of a modified conjugated diene polymer obtained by reacting an imino group-containing hydrocarbyloxysilane compound represented by the formula: (B) 30 to 100 parts by mass of a filler containing 5 to 95% by mass of an inorganic filler and 100 parts by mass of the rubber component, and (C) bindable to the inorganic filler A silane coupling agent comprising a compound containing at least an element or a functional group and a protected mercapto group is contained at a ratio of 2 to 25% by mass with respect to the inorganic filler in the component (B). Rubber composition.

The rubber composition according to claim 1, wherein the functional group capable of binding to the inorganic filler of the component (C) is an alkoxysilane group.

The component (C) is represented by the general formula (II)

[Wherein, R ⁵ represents —Cl, —Br, R ¹⁰ O—, R ¹⁰ C (═O) O—, R ¹⁰ R ¹¹ C═NO—, R ¹⁰ R ¹¹ N— or — (OSiR ¹⁰ R ¹¹ _{^{^{) m (OSiR 9 R 10 R}}} 11) ( provided that, R ¹⁰ and R ¹¹ are each independently a hydrogen atom or a C1-18 monovalent hydrocarbon group.), R ⁶ is R ^5, hydrogen An atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, R ⁷ is R ⁵ , R ⁶ or — [O (R ¹² O) _a ] _0.5 — group (where R ¹² is alkylene having 1 to 18 carbon atoms) Group, a is an integer of 1 to 4.), R ⁸ represents a divalent hydrocarbon group having 1 to 18 carbon atoms, R ⁹ represents a monovalent hydrocarbon group having 1 to 18 carbon atoms, x, y and z are numbers satisfying the relationship of x + y + 2z = 3, 0 ≦ x ≦ 3, 0 ≦ y ≦ 2, and 0 ≦ z ≦ 1. And / or general formula (III)

[Wherein R ¹³ is or straight chain having 1 to 20 carbon atoms, branched or cyclic alkyl group, G is independently an alkanediyl group or an alkenediyl group having 1 to 9 carbon atoms, Z ^a are each independently a group capable of binding with two silicon _{atoms, [- O-] 0.5, [} - O-G-] is a group selected from _0.5, or _{[-O-G-O-] 0.5} , Z ^b is a group that can independently bond to two silicon atoms, and is a functional group represented by [—O—G—O—] _0.5 , and Z ^c is independently —Cl, —Br , —OR ¹⁴ , R ¹⁴ C (═O) O—, R ¹⁴ R ¹⁵ C═NO—, R ¹⁴ R ¹⁵ N—, R ¹⁴ —, HO—G—O—, R and G coincide with the above notation. m, n, u, v, and w are independently 1 ≦ m ≦ 20, 0 ≦ n ≦ 20, 0 ≦ u ≦ 3, 0 ≦ v ≦ 2, 0 <w ≦ 1, and (u / 2) + v + 2w = 2 or 3.
When there are a plurality of parts A, each of Z ^a _u , Z ^b _v and Z ^c _w in the plurality of A parts may be the same or different, and when there are a plurality of B parts, Z ^a _u in the plurality of B parts , Z ^b _v and Z ^c _w may be the same or different. The rubber composition according to claim 1, wherein the rubber composition is represented by the formula:

(B) the rubber composition according to any one of claims 1 to 3 inorganic filler is silica.

Before SL (C) component, the formula (IV),

Chemical formula (V), and

Chemical formula (VI)

[In the formula, each L is independently an alkanediyl or alkenediyl group having 1 to 9 carbon atoms. The rubber composition according to claim 1, 2 or 4 , which is at least one silane coupling agent represented by the formula:

(A) The rubber composition in any one of Claims 1-5 containing 40-70 mass parts of fillers with respect to 100 mass parts of rubber components.

The rubber composition according to any one of claims 1 to 6, wherein the rubber component (A) contains 30 to 70% by mass of (A-1) a modified conjugated diene polymer.

(C) The rubber composition in any one of Claims 1-7 containing 1-3 mass% of a component.

The rubber composition according to any one of claims 1 to 8, wherein (A-1) the modified conjugated diene-based polymer is a modified aromatic vinyl-conjugated diene copolymer.

A pneumatic tire using the rubber composition according to claim 1 for a tread.

The pneumatic tire according to claim 10, which is mounted on a passenger car, a small truck, and a small bus.

The pneumatic tire according to claim 11, wherein the ply rating based on the JATMA standard is 6 to 10 PR.