JP4866009B2 - Compound and composition containing the same - Google Patents

Compound and composition containing the same Download PDF

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JP4866009B2
JP4866009B2 JP2005069771A JP2005069771A JP4866009B2 JP 4866009 B2 JP4866009 B2 JP 4866009B2 JP 2005069771 A JP2005069771 A JP 2005069771A JP 2005069771 A JP2005069771 A JP 2005069771A JP 4866009 B2 JP4866009 B2 JP 4866009B2
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resorcin
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JP2005289989A (en
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一也 塚本
伸正 荒柴
昭憲 長友
弘毅 大垣
剛史 小林
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Mitsui Chemicals Inc
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Description

本発明は、空気入りタイヤや工業用ベルト等のゴム物品に用いられるスチールコード等の金属補強材との接着耐久性を向上させる新規な組成物または化合物に関し、更に詳しくは、ゴムと配合した際のゴム組成物の加工性が良好であり、且つ該ゴム組成物の貯蔵期間に係らず金属補強材に対し安定して初期接着性及び耐湿熱接着性を発現させることができる、特定構造を有する化合物および該化合物を主成分とする組成物に関するものである。   The present invention relates to a novel composition or compound that improves adhesion durability with a metal reinforcing material such as a steel cord used in rubber articles such as pneumatic tires and industrial belts, and more particularly, when blended with rubber. The rubber composition has a specific structure that has good processability and can stably exhibit initial adhesiveness and heat-and-moisture resistance to metal reinforcing materials regardless of the storage period of the rubber composition. The present invention relates to a compound and a composition containing the compound as a main component.

自動車用タイヤ、コンベアベルト、ホース等、特に強度が要求されるゴム製品には、ゴムを補強し強度、耐久性を向上させる目的で、スチールコード等の金属補強材をゴム組成物で被覆した複合材料が用いられている。該ゴム−金属複合材料が高い補強効果を発揮し信頼性を得るためにはゴム−金属補強材間に混合、配合、貯蔵等の条件に左右されない安定した接着が必要である。かかる複合体を得るには、亜鉛、黄銅、真鍮等でメッキされたスチールコード等の金属補強材を、硫黄を配合したゴム組成物に埋設し加熱加硫時に、ゴムの加硫と同時に接着させるいわゆる直接加硫接着が広く用いられており、これまで該直接加硫接着におけるゴム−金属補強材間の接着性、特に耐湿熱接着性向上のため様々な検討が行われている。   For rubber products that require particularly high strength, such as automobile tires, conveyor belts, hoses, etc., composites in which a metal reinforcing material such as a steel cord is coated with a rubber composition to reinforce the rubber and improve its strength and durability. Material is used. In order for the rubber-metal composite material to exhibit a high reinforcing effect and to obtain reliability, stable adhesion that is not affected by the conditions of mixing, blending, storage and the like is necessary between the rubber-metal reinforcing material. In order to obtain such a composite, a metal reinforcing material such as a steel cord plated with zinc, brass, brass or the like is embedded in a rubber composition containing sulfur, and is adhered at the same time as rubber vulcanization at the time of heat vulcanization. So-called direct vulcanization bonding has been widely used, and various studies have been made so far in order to improve the adhesion between the rubber and the metal reinforcing material in the direct vulcanization bonding, particularly the wet heat resistance.

例えば、レゾルシン又は、レゾルシンとホルマリンを縮合して得られる、レゾルシン−ホルムアルデヒド樹脂(以下、「RF樹脂」と略記する。)を耐湿熱接着性向上の目的で配合したゴム組成物が報告されている(特開2001−234140号公報)。RF樹脂を配合することでスチールコードとゴムの耐湿熱接着性は確かに飛躍的に向上する。   For example, there has been reported a rubber composition containing resorcin or a resorcin-formaldehyde resin (hereinafter abbreviated as “RF resin”) obtained by condensing resorcin or resorcin and formalin for the purpose of improving moisture and heat resistance. (Japanese Patent Laid-Open No. 2001-234140). By blending the RF resin, the moisture and heat resistance of the steel cord and rubber will certainly improve dramatically.

しかしながら、レゾルシンやRF樹脂は極性が非常に高いためゴムとの相溶性に乏しく、混合、配合、貯蔵等の条件によって、レゾルシンやRF樹脂が析出するいわゆるブルームが発生するため、ゴム物品の外観を損ねる恐れがある。また、ブルーム発生により、該ゴム組成物を配合してから加硫接着まで長期間貯蔵すると接着性が低下するといった問題が生じるため、レゾルシンやRF樹脂を配合したゴム組成物は速やかに加硫接着させる必要があり、ゴム物品の生産性を損ねかねない。   However, resorcin and RF resins are very polar and have poor compatibility with rubber, and so-called blooms that precipitate resorcin and RF resins are generated depending on the conditions of mixing, blending, storage, etc. There is a risk of damage. In addition, due to the occurrence of bloom, there is a problem that the adhesiveness decreases when the rubber composition is compounded and then stored for a long time from vulcanization adhesion. Therefore, the rubber composition formulated with resorcin or RF resin is vulcanized and bonded quickly. This may impair the productivity of rubber articles.

また、重量平均分子量が3000〜45000のレゾルシン骨格を有する混合ポリエステルからなる、接着材料が報告されている(特開平7−118621号公報)。しかしながら、分子量が大きな混合ポリエステルはRF樹脂と比較してゴムとの相溶性は改善されるものの、完全に満足できるものとはなっていない。さらに、高分子量の混合ポリエステルをゴムに配合すると、配合ゴムの粘度が上昇し、加工性が低下するといった問題があり、耐湿熱接着性も十分なものとはなっていない。
特開2001−234140号公報 特開平7−118621号公報
Further, an adhesive material made of a mixed polyester having a resorcin skeleton having a weight average molecular weight of 3000 to 45000 has been reported (Japanese Patent Laid-Open No. 7-118621). However, mixed polyester having a large molecular weight is not completely satisfactory, although the compatibility with rubber is improved as compared with RF resin. Furthermore, when a high molecular weight mixed polyester is blended with rubber, there is a problem that the viscosity of the blended rubber is increased and the processability is lowered, and the wet heat resistance is not sufficient.
JP 2001-234140 A JP-A-7-118621

本発明は、ゴムに配合した際のゴム組成物が加工性と高い耐湿熱接着性を維持しながら、レゾルシンやRF樹脂を配合した時に見られるブルームを極力抑制し、該ゴム組成物の貯蔵中の接着性低下を少なくでき、優れた接着安定性を発現させることができる、特定構造を有する化合物および該化合物を主成分とする組成物を提供することを目的とする。   The present invention suppresses bloom as seen when compounding resorcinol and RF resin as much as possible while maintaining the processability and high heat-and-moisture resistance adhesion when the rubber composition is compounded with rubber. It is an object of the present invention to provide a compound having a specific structure and a composition containing the compound as a main component, which can reduce a decrease in adhesiveness and can exhibit excellent adhesion stability.

本発明者らは、前記課題を達成するため鋭意検討した結果、特定構造の化合物または該化合物を主成分とする組成物をゴムに配合することで、レゾルシンやRF樹脂と同等以上の耐湿熱接着性を維持しつつ、レゾルシンやRF樹脂の問題点であるゴムと配合して得られるゴム組成物の加工性を保持するとともに、ブルーム発生を抑制し、配合、貯蔵等の条件によらず優れた接着安定性を示すことを見出し、本発明を完成させるに至った。   As a result of diligent studies to achieve the above-mentioned problems, the present inventors have formulated a compound having a specific structure or a composition containing the compound as a main component into a rubber so that the heat- and heat-resistant adhesion equivalent to or better than that of resorcinol or RF resin can be obtained. While maintaining the properties, while maintaining the workability of the rubber composition obtained by blending with the rubber which is a problem of resorcinol and RF resin, it suppresses the occurrence of bloom and is excellent regardless of the conditions of blending, storage, etc. The present inventors have found that it exhibits adhesion stability and have completed the present invention.

即ち、本発明は、
(I)下記一般式(2)で表される化合物;

Figure 0004866009


(式中、Rは炭素数1〜16の2価の脂肪族基を表す。)
並びに
(II)上記一般式(2)で表される化合物が60〜100重量%、下記一般式(3)で表され且つn=2の化合物が0〜20重量%、下記一般式(3)で表され且つn=3の化合物が0〜10重量%及び下記一般式(3)で表され且つn=4〜6の化合物が合計で0〜10重量%からなる組成物(但し、該組成物は、上記一般式(2)で表される化合物が100重量%である純物質を包含しない)
Figure 0004866009

(式中、Rは炭素数1〜16の2価の脂肪族基を表し、nは2〜6の整数を示す。)
に関するものである。 That is, the present invention
(I) a compound represented by the following general formula (2) ;
Figure 0004866009


(In the formula, R represents a divalent aliphatic group having 1 to 16 carbon atoms.)
And
(II) The compound represented by the general formula (2) is 60 to 100% by weight, the compound represented by the following general formula (3) and n = 2 is 0 to 20% by weight, and the following general formula (3) And a compound represented by the following general formula (3), wherein n = 3 is 0 to 10% by weight, and n = 4 to 6 is a composition comprising 0 to 10% by weight in total (provided that the composition Does not include a pure substance in which the compound represented by the general formula (2) is 100% by weight)
Figure 0004866009

(In the formula, R represents a divalent aliphatic group having 1 to 16 carbon atoms, and n represents an integer of 2 to 6.)
It is about.

本発明によれば、ゴムと配合して得られるゴム組成物が加工性と高い耐湿熱接着性を維持しながら、レゾルシンやRF樹脂を配合した時に見られるブルームを極力抑制し、該ゴム組成物の貯蔵中の接着性低下が少なく安定した接着性を発現させる事ができる、化合物および該化合物を主成分とする組成物を提供することができる。   According to the present invention, the rubber composition obtained by blending with rubber maintains the workability and high moisture and heat resistance adhesion, while suppressing the bloom seen when blending resorcinol and RF resin as much as possible, and the rubber composition It is possible to provide a compound and a composition containing the compound as a main component, which can exhibit stable adhesiveness with little decrease in adhesiveness during storage.

以下に、本発明を詳細に説明する。本発明の化合物は、上記一般式(2)で表されることを特徴とする。一般式(2)中のRは、炭素数1〜16の2価の脂肪族基を表す The present invention is described in detail below. The compound of the present invention is represented by the general formula (2) . R in General formula (2) represents a C1-C16 bivalent aliphatic group .

ここで、炭素数1〜16の2価の脂肪族基としては、例えば、メチレン基、エチレン基、ブチレン基、イソブチレン基、オクチレン基、2−エチルヘキシレン基等の直鎖または分岐鎖のアルキレン基、ビニレン基(エテニレン基)、ブテニレン基、オクテニレン基等の直鎖または分岐鎖のアルケニレン基、これらのアルキレン基又はアルケニレン基の水素原子がヒドロキシル基又はアミノ基等で置換されたアルキレン基またはアルケニレン基、シクロヘキシレン基等の脂環式基が挙げられる。これらの中でも入手の容易さ等を考慮すれば、炭素数2〜10のアルキレン基が望ましく、特にエチレン基、ブチレン基又はオクチレン基が好ましい。   Here, examples of the divalent aliphatic group having 1 to 16 carbon atoms include linear or branched alkylene such as methylene group, ethylene group, butylene group, isobutylene group, octylene group, and 2-ethylhexylene group. Group, vinylene group (ethenylene group), butenylene group, octenylene group or other linear or branched alkenylene group, alkylene group or alkylene group or alkenylene in which the hydrogen atom of alkenylene group is substituted with hydroxyl group or amino group And alicyclic groups such as a cyclohexylene group. Among these, in view of availability, an alkylene group having 2 to 10 carbon atoms is preferable, and an ethylene group, a butylene group, or an octylene group is particularly preferable.

一般式(2)で表される化合物の具体例としてはマロン酸ビス(3−ヒドロキシフェニル)エステル、コハク酸ビス(3−ヒドロキシフェニル)エステル、フマル酸ビス(3−ヒドロキシフェニル)エステル、マレイン酸ビス(3−ヒドロキシフェニル)エステル、リンゴ酸ビス(3−ヒドロキシフェニル)エステル、イタコン酸ビス(3−ヒドロキシフェニル)エステル、シトラコン酸ビス(3−ヒドロキシフェニル)エステル、アジピン酸ビス(3−ヒドロキシフェニル)エステル、酒石酸ビス(3−ヒドロキシフェニル)エステル、アゼライン酸ビス(3−ヒドロキシフェニル)エステル、セバシン酸ビス(3−ヒドロキシフェニル)エステル、シクロヘキサンジカルボン酸ビス(3−ヒドロキシフェニル)エステルが挙げられる。 Specific examples of the compound represented by the general formula (2), malonic acid bis (3-hydroxyphenyl) ester, succinic acid bis (3-hydroxyphenyl) ester, fumaric acid bis (3-hydroxyphenyl) ester, maleic Acid bis (3-hydroxyphenyl) ester, malic acid bis (3-hydroxyphenyl) ester, itaconic acid bis (3-hydroxyphenyl) ester, citraconic acid bis (3-hydroxyphenyl) ester, adipic acid bis (3-hydroxy Phenyl) ester, tartrate bis (3-hydroxyphenyl) ester, azelaic acid bis (3-hydroxyphenyl) ester, sebacic acid bis (3-hydroxyphenyl) ester, cyclohexanedicarboxylic acid bis (3-hydroxyphenyl) ester, etc. Be

これらの中でもコハク酸ビス(3−ヒドロキシフェニル)エステル、アジピン酸ビス(3−ヒドロキシフェニル)エステル、セバシン酸ビス(3−ヒドロキシフェニル)エステルが好ましい。 Among these , succinic acid bis (3-hydroxyphenyl) ester, adipic acid bis (3-hydroxyphenyl) ester, and sebacic acid bis (3-hydroxyphenyl) ester are preferable.

一般式(2)で表される化合物の製造法は特に限定されないが、例えば、下記一般式(4)で表されるジカルボン酸ハライドと、

Figure 0004866009


(式中、Rは炭素数1〜16の2価の脂肪族基を表し、Xはハロゲン原子を表す。)
レゾルシンと
を塩基の存在下または非存在下で反応させて製造される。 Although the manufacturing method of the compound represented by General formula (2) is not specifically limited, For example, the dicarboxylic acid halide represented by following General formula (4),
Figure 0004866009


(In the formula, R represents a divalent aliphatic group having 1 to 16 carbon atoms, and X represents a halogen atom.)
It is produced by reacting resorcin with or without a base.

一般式(4)中のRは、前記一般式(2)中のRと同義であり、Xはハロゲン原子を表す。ハロゲン原子としては、塩素原子又は臭素原子が好ましい。 R in the general formula (4) has the same meaning as R in the general formula (2) , and X represents a halogen atom. As a halogen atom, a chlorine atom or a bromine atom is preferable.

一般式(4)で表される化合物としては、マロン酸ジクロライド、コハク酸ジクロライド、フマル酸ジクロライド、マレイン酸ジクイロライド、グルタル酸ジクロライド、アジピン酸ジクロライド、スベリン酸ジクロライド、アゼライン酸ジクロライド、セバシン酸ジクロライド、1,10−デカンジカルボン酸ジクロライド、1,12−ドデカンジカルボン酸ジクロライド、1,16−ヘキサデカンジカルボン酸ジクロライド等の脂肪族ジカルボン酸ジクロライド、シクロヘキサンジカルボン酸ジクロライド、シクロヘキセンジカルボン酸ジクロライド等の脂環式ジカルボン酸ジクロライド、マロン酸ジブロマイド、コハク酸ジブロマイド、フマル酸ジブロマイド、マレイン酸ジブロマイド、グルタル酸ジブロマイド、アジピン酸ジブロマイド、スベリン酸ジブロマイド、アゼライン酸ジブロマイド、セバシン酸ジブロマイド、1,10−デカンジカルボン酸ジブロマイド、1,12−ドデカンジカルボン酸ジブロマイド、1,16−ヘキサデカンジカルボン酸ジブロマイド等の脂肪族ジカルボン酸ジブロマイド、シクロヘキサンジカルボン酸ジブロマイド、シクロヘキセンジカルボン酸ジブロマイド等の脂環式ジカルボン酸ジブロマイドが挙げられる。これらの中でも、マロン酸ジクロライド、コハク酸ジクロライド、アジピン酸ジクロライド、アゼライン酸ジクロライド、セバシン酸ジクロライド、マロン酸ジブロマイド、コハク酸ジブロマイド、アジピン酸ジブロマイド、アゼライン酸ジブロマイド、セバシン酸ジブロマイド等が好ましい。   The compound represented by the general formula (4) includes malonic acid dichloride, succinic acid dichloride, fumaric acid dichloride, maleic acid dichloride, glutaric acid dichloride, adipic acid dichloride, suberic acid dichloride, azelaic acid dichloride, sebacic acid dichloride, 1 , 10-decane dicarboxylic acid dichloride, 1,12-dodecane dicarboxylic acid dichloride, aliphatic dicarboxylic acid dichloride such as 1,16-hexadecane dicarboxylic acid dichloride, cyclohexane dicarboxylic acid dichloride, alicyclic dicarboxylic acid dichloride such as cyclohexene dicarboxylic acid dichloride , Malonic acid dibromide, succinic acid dibromide, fumaric acid dibromide, maleic acid dibromide, glutaric acid dibromide, adipic acid dibromide Aliphatic groups such as disulfide, suberic acid dibromide, azelaic acid dibromide, sebacic acid dibromide, 1,10-decanedicarboxylic acid dibromide, 1,12-dodecanedicarboxylic acid dibromide, 1,16-hexadecanedicarboxylic acid dibromide Examples thereof include alicyclic dicarboxylic acid dibromides such as dicarboxylic acid dibromide, cyclohexane dicarboxylic acid dibromide, and cyclohexene dicarboxylic acid dibromide. Among these, malonic acid dichloride, succinic acid dichloride, adipic acid dichloride, azelaic acid dichloride, sebacic acid dichloride, malonic acid dibromide, succinic acid dibromide, adipic acid dibromide, azelaic acid dibromide, sebacic acid dibromide, etc. preferable.

一般式(4)で表される化合物とレゾルシンとを反応させる際に使用する塩基としては、通常、ピリジン、β−ピコリン、N−メチルモルホリン、ジメチルアニリン、ジエチルアニリン、トリメチルアミン、トリエチルアミン、トリブチルアミン等の有機塩基が用いられる。 As the base used for reacting the compound represented by the general formula (4) with resorcin , usually, pyridine, β-picoline, N-methylmorpholine, dimethylaniline, diethylaniline, trimethylamine, triethylamine, tributylamine, etc. The organic base is used.

一般式(4)で表される化合物とレゾルシンとを反応させる際は、通常、一般式(4)で表される化合物とレゾルシンとが1:4〜1:30のモル比となるように反応させる。 When the compound represented by the general formula (4) and resorcin are reacted, the reaction is usually performed so that the compound represented by the general formula (4) and resorcin have a molar ratio of 1: 4 to 1:30. Let

一般式(4)で表される化合物とレゾルシンとを反応させる際、原料を溶解させること等を目的として溶媒を用いる事ができる。溶媒としては、上述の有機塩基をそのまま溶媒として使用しても良いし、反応を阻害しない他の有機溶媒を用いても構わない。このような溶媒としては、例えば、ジメチルエーテル、ジオキサン等のエーテル系溶媒が挙げられる。 When the compound represented by the general formula (4) is reacted with resorcin , a solvent can be used for the purpose of dissolving the raw materials. As the solvent, the above-described organic base may be used as it is, or another organic solvent that does not inhibit the reaction may be used. Examples of such a solvent include ether solvents such as dimethyl ether and dioxane.

一般式(4)で表される化合物とレゾルシンとを反応させる際の反応温度は、通常、−20℃〜100℃で行なわれる。 The reaction temperature for reacting the compound represented by the general formula (4) with resorcin is usually -20 ° C to 100 ° C.

前記の反応により得られる一般式(2)で表される化合物は、公知の方法により反応混合物から単離することができる。即ち、減圧蒸留等の操作により、反応に用いた有機塩基およびレゾルシン、反応に有機溶媒を使用した場合にはこの有機溶媒を留去し乾固させる方法、反応混合物に一般式(2)で表される化合物の貧溶媒を添加して再沈殿させる方法、反応混合液に水および水と混和しない有機溶媒を添加して有機層に抽出する方法等が挙げられる。また、場合によっては再結晶により精製しても良い。 The compound represented by the general formula (2) obtained by the above reaction can be isolated from the reaction mixture by a known method. That is, the organic base and resorcin used in the reaction by an operation such as distillation under reduced pressure, and when an organic solvent is used in the reaction, the organic solvent is distilled off to dryness, and the reaction mixture is represented by the general formula (2) . And a method of reprecipitation by adding a poor solvent of the compound to be added, a method of adding water and an organic solvent immiscible with water to the reaction mixture, and extracting to the organic layer. Moreover, you may refine | purify by recrystallization depending on the case.

前記一般式(2)で表される化合物の貧溶媒としては、通常、水が用いられる。また、上記水と混和しない有機溶媒としては、酢酸エチル、酢酸ブチル等のエステル類、メチルイソブチルケトン、ジイソブチルケトン等のケトン類が用いられる。 As a poor solvent for the compound represented by the general formula (2) , water is usually used. Examples of the organic solvent immiscible with water include esters such as ethyl acetate and butyl acetate, and ketones such as methyl isobutyl ketone and diisobutyl ketone.

レゾルシンを用いることで、一般式(2)で表される化合物を主成分とする、一般式(2)で表される化合物と一般式(3)で表される化合物とからなる組成物が得られる。 In Rukoto using resorcin, as a main component a compound represented by the general formula (2), a composition comprising a compound represented by the compound represented by the general formula (2) and the general formula (3) is can get.

一般式(3)中のRは、一般式(2)中のRと同義であり、nは2〜6の整数を示す。 R in General formula (3) is synonymous with R in General formula (2) , and n shows the integer of 2-6.

例えば、前記の反応にレゾルシンを用いることで得られる一般式(2)で表される化合物と一般式(3)で表される化合物とからなる組成物中には、通常、一般式(2)で表される化合物が60〜100重量%、一般式(3)におけるn=2の化合物が0〜20重量%、一般式(3)におけるn=3の化合物が0〜10重量%、一般式(3)におけるn=4〜6の化合物が合計で10重量%程度含まれる。これらの比率は、一般式(4)で表される化合物とレゾルシンのモル比を変化させる事でコントロール可能である。 For example, the the composition which is composed of a compound represented by the general formula obtained in Rukoto using resorcinol compound represented by (2) and the general formula (3) in the reaction, usually, the general formula (2 ) Is 60 to 100% by weight, the compound of n = 2 in the general formula (3) is 0 to 20% by weight, the compound of n = 3 in the general formula (3) is 0 to 10% by weight, The compound of n = 4-6 in Formula (3) is contained about 10 weight% in total. These ratios can be controlled by changing the molar ratio of the compound represented by the general formula (4) and resorcin.

前記一般式(2)で表される化合物と一般式(3)で表される化合物とからなる組成物も前記一般式(2)で表される化合物の単離方法と同様の方法により、これらを含む反応混合物から単離することができる。 A composition comprising the compound represented by the general formula (2) and the compound represented by the general formula (3) can be obtained by the same method as the method for isolating the compound represented by the general formula (2). Can be isolated from a reaction mixture comprising

一般式(2)で表される化合物が60重量%以上である組成物の場合、ゴムと配合して接着した際の湿熱接着性が向上する。湿熱接着性向上の観点から判断すれば、より好ましくは一般式(2)で表される化合物の含有量が70〜100重量%であり、更に好ましくは80〜100重量%である。   In the case of a composition in which the compound represented by the general formula (2) is 60% by weight or more, the wet heat adhesiveness is improved when blended with rubber and bonded. Judging from the viewpoint of improving wet heat adhesion, the content of the compound represented by the general formula (2) is more preferably 70 to 100% by weight, still more preferably 80 to 100% by weight.

本発明の化合物および該化合物を主成分とする組成物は、レゾルシンやRF樹脂に比べ、ゴム成分と混ざりやすいという特徴がある。そのため、本発明の化合物又は該化合物を主成分とする組成物を配合したゴム組成物は、レゾルシンやRF樹脂を配合したゴム組成物よりもブルームしにくい傾向がある。これは、本発明の化合物および該化合物を主成分とする組成物がレゾルシンやRF樹脂に比べて極性が低いためと推定される。また、本発明の化合物および該化合物を主成分とする組成物を配合したゴム組成物は、貯蔵期間に関わらず接着安定性に優れている。そのため、本発明の化合物および該化合物を主成分とする組成物は接着向上剤として有用である。   The compound of the present invention and the composition containing the compound as a main component are characterized by being easily mixed with a rubber component as compared with resorcin and RF resin. Therefore, a rubber composition containing the compound of the present invention or a composition containing the compound as a main component tends to be less likely to bloom than a rubber composition containing resorcin or RF resin. This is presumably because the compound of the present invention and the composition containing the compound as a main component have a lower polarity than resorcin or RF resin. Moreover, the rubber composition containing the compound of the present invention and the composition containing the compound as a main component is excellent in adhesion stability regardless of the storage period. Therefore, the compound of the present invention and the composition containing the compound as a main component are useful as an adhesion improver.

以下に、実施例、参考例、比較例を上げて本発明を更に詳しく説明するが、本発明は下記の実施例に何ら限定されるものではない。   Hereinafter, the present invention will be described in more detail with reference to Examples, Reference Examples, and Comparative Examples, but the present invention is not limited to the following Examples.

(実施例1)
レゾルシン330.6g(3.0mol)をピリジン600.0gに溶解した溶液を氷浴上で15℃以下に保ちながら、これに塩化アジポイル54.9g(0.30mol)を徐々に滴下した。滴下終了後、得られた反応混合物を室温まで昇温し、1昼夜放置し反応を完結させた。反応混合物から、ピリジンを減圧下に留去し、残留物に水1200gを加えて氷冷すると沈殿が析出した。析出した沈殿をろ過、水洗し、得られた湿体を減圧乾燥して、白色〜淡黄色の粉体84gを得た。この粉体を分取用装置を備えた液体クロマトグラフィーで下記の条件で処理し、主たる成分を含む溶離液を分取した。この溶離液を濃縮し、析出した結晶をろ過して回収し、減圧乾燥して融点140〜143℃の結晶を得た。HPLC分析の結果、この結晶は純度98%のアジピン酸ビス(3−ヒドロキシフェニル)エステルであった。
Example 1
While a solution of 330.6 g (3.0 mol) of resorcin in 600.0 g of pyridine was kept at 15 ° C. or lower on an ice bath, 54.9 g (0.30 mol) of adipoyl chloride was gradually added dropwise thereto. After completion of the dropping, the resulting reaction mixture was warmed to room temperature and allowed to stand for one day to complete the reaction. From the reaction mixture, pyridine was distilled off under reduced pressure, and 1200 g of water was added to the residue and ice-cooled to precipitate. The deposited precipitate was filtered and washed with water, and the obtained wet body was dried under reduced pressure to obtain 84 g of white to light yellow powder. This powder was processed under the following conditions by liquid chromatography equipped with a fractionation device, and an eluent containing main components was fractionated. The eluent was concentrated, and the precipitated crystals were collected by filtration and dried under reduced pressure to obtain crystals having a melting point of 140 to 143 ° C. As a result of HPLC analysis, the crystals were 98% pure adipic acid bis (3-hydroxyphenyl) ester.

分取用のHPLC条件は下記の通りである。
カラム :Shim-pack PREP−ODS(島津製作所製)
カラム温度 :25℃
溶離液 :メタノール/水混合溶剤(85/15(w/w%))
溶離液の流速:流量3ml/分
検出器 :UV検出器(254nm)
Preparative HPLC conditions are as follows.
Column: Shim-pack PREP-ODS (manufactured by Shimadzu Corporation)
Column temperature: 25 ° C
Eluent: Methanol / water mixed solvent (85/15 (w / w%))
Eluent flow rate: Flow rate 3ml / min Detector: UV detector (254nm)

尚、アジピン酸ビス(3−ヒドロキシフェニル)エステルの同定データは下記の通りである。
MSスペクトルデータ
EI(Pos.) m/z=330
IRスペクトルデータ
3436cm−1 : 水酸基
2936cm−1 : アルキル
1739cm−1 : エステル
NMRスペクトルデータを表1−1および表1−2に示した。
In addition, the identification data of adipic acid bis (3-hydroxyphenyl) ester are as follows.
MS spectrum data EI (Pos.) M / z = 330
IR spectrum data 3436 cm −1: hydroxyl group 2936 cm −1: alkyl 1739 cm −1: ester NMR spectrum data are shown in Table 1-1 and Table 1-2.

Figure 0004866009
Figure 0004866009

(実施例2)
実施例1と同様に反応を行い得られた粉体84gをHPLCにて分析した結果、この粉体中のアジピン酸ビス(3−ヒドロキシフェニル)エステルは89重量%であった。粉体中には、他に下記式(6)で表される化合物(以下、オリゴマーということもある。)中のn=2の化合物が7重量%、下記式(6)で表される化合物中のn=3の化合物が2重量%、原料レゾルシンが2重量%含まれていた。尚、下記式(6)で表される化合物の同定はLC−MSにて行った。

Figure 0004866009

(Example 2)
As a result of HPLC analysis of 84 g of the powder obtained by carrying out the reaction in the same manner as in Example 1, 89% by weight of bis (3-hydroxyphenyl) adipic acid ester in this powder was obtained. In the powder, the compound represented by the following formula (6) is 7% by weight of the compound of n = 2 in the compound represented by the following formula (6) (hereinafter sometimes referred to as oligomer). Among them, the compound of n = 3 contained 2% by weight and the raw material resorcin was contained by 2% by weight. The compound represented by the following formula (6) was identified by LC-MS.
Figure 0004866009

MSスペクトルの測定条件は下記の通りである。
質量範囲 : 200〜2000amu(1.98+0.02sec)
イオン化法 : ESI(エレクトロスプレー)
モード : 正
Capilary : 3.15kV
Cone : 35V
S.B.Tmp. : 150℃
Deslv.tmp : 400℃
Multi : 650V
N2 : 750L/hr
n=2 : 551.1[M+H]+ 、 568.2[M+NH4]+
n=3 : 771.2[M+H]+ 、 788.2[M+NH4]+
n=4 : 1008.3[M+NH4]+
n=5 : 1228.3[M+NH4]+
The measurement conditions for the MS spectrum are as follows.
Mass range: 200 to 2000 amu (1.98 + 0.02 sec)
Ionization method: ESI (electrospray)
Mode: Positive
Capilary: 3.15kV
Cone: 35V
SBTmp .: 150 ° C
Deslv.tmp: 400 ° C
Multi: 650V
N2: 750 L / hr
n = 2: 551.1 [M + H] +, 568.2 [M + NH4] +
n = 3: 771.2 [M + H] +, 788.2 [M + NH4] +
n = 4: 1008.3 [M + NH4] +
n = 5: 1228.3 [M + NH4] +

また、HPLCの分析条件は下記の通りである。
1.アジピン酸ビス(3−ヒドロキシフェニル)エステル、レゾルシンの分析
カラム : YMC社 A−312 ODS
カラム温度: 40℃
溶離液 : メタノール/水=7/3(リン酸でpH=3に調整)
検出 : UV(254nm)
The HPLC analysis conditions are as follows.
1. Analysis of bis (3-hydroxyphenyl) adipate and resorcin Column: YMC A-312 ODS
Column temperature: 40 ° C
Eluent: Methanol / water = 7/3 (adjusted to pH = 3 with phosphoric acid)
Detection: UV (254 nm)

2.オリゴマーの分析
カラム : YMC社 A−312 ODS
カラム温度: 40℃
溶離液 : アセトニトリル/水=8/2(酢酸でpH=3.5に調整)
検出 : UV(254nm)
2. Analysis of oligomer Column: YMC A-312 ODS
Column temperature: 40 ° C
Eluent: acetonitrile / water = 8/2 (adjusted to pH = 3.5 with acetic acid)
Detection: UV (254 nm)

(実施例3)
レゾルシンを176.2g(1.6mol)、ピリジンを400g、塩化アジポイルを73.2g(0.40mol)に変えた以外は実施例1と同様の操作を行い、118.6gの粉体を得た。HPLC分析の結果、粉体中には、アジピン酸ビス(3−ヒドロキシフェニル)エステルが73.4重量%、前記式(6)中のn=2の化合物が13.9重量%、前記式(6)中のn=3の化合物が3.0重量%、前記式(6)中のn=4の化合物が0.8重量%、前記式(6)中のn=5の化合物が0.2重量%、原料レゾルシンが2.9重量%含まれていた。
(Example 3)
The same operation as in Example 1 was carried out except that 176.2 g (1.6 mol) of resorcin, 400 g of pyridine and 73.2 g (0.40 mol) of adipoyl chloride were changed to obtain 118.6 g of powder. As a result of HPLC analysis, in the powder, 73.4% by weight of bis (3-hydroxyphenyl) adipic acid ester, 13.9% by weight of the compound of n = 2 in the formula (6), The compound of n = 3 in 6) is 3.0% by weight, the compound of n = 4 in the formula (6) is 0.8% by weight, and the compound of n = 5 in the formula (6) is 0.8%. It contained 2% by weight and 2.9% by weight of the raw material resorcin.

(実施例4)
レゾルシン440.4g(4.0mol)をピリジン405.0gに溶解した溶液を氷浴上で15℃以下に保ちながら、これにコハク酸ジクロライド62.0g(0.4mol)を徐々に滴下した。滴下終了後、得られた反応混合物を室温まで昇温し、1昼夜放置し反応を完結させた。反応混合物から、ピリジンを減圧下に留去し、残留物に水1800gを加えて氷冷すると液全体が白濁し二層に分離した。オイル層に水200gおよび酢酸エチル600gを添加し抽出操作を行った。得られた有機層を冷水で5回洗浄した後に硫酸マグネシウムで乾燥した。その後酢酸エチルを留去し得られた粘ちょう物にトルエン500gを添加して結晶化させ、濾過、トルエン洗浄した後、水1Lでのスラッジングを2回行った。得られた湿体を100gのメタノールに溶解した後、水1Lを装入して再沈殿させ、濾過、洗浄、乾燥して82.3gの淡黄色粉体を得た。HPLC分析の結果、粉体の主成分は91.0面積%に相当する成分であることがわかった。また、この粉体中にはレゾルシンが0.7重量%含まれていた。構造解析の結果、粉体中の主成分はコハク酸ビス(3−ヒドロキシフェニル)エステルである事が判った。
Example 4
While keeping a solution of 440.4 g (4.0 mol) of resorcin in 405.0 g of pyridine at 15 ° C. or lower on an ice bath, 62.0 g (0.4 mol) of succinic dichloride was gradually added dropwise thereto. After completion of the dropping, the resulting reaction mixture was warmed to room temperature and allowed to stand for one day to complete the reaction. From the reaction mixture, pyridine was distilled off under reduced pressure. When 1800 g of water was added to the residue and cooled on ice, the whole solution became cloudy and separated into two layers. Extraction operation was performed by adding 200 g of water and 600 g of ethyl acetate to the oil layer. The obtained organic layer was washed 5 times with cold water and then dried over magnesium sulfate. Thereafter, 500 g of toluene was added to the viscous product obtained by distilling off ethyl acetate, and the mixture was crystallized, filtered, washed with toluene, and then sludged with 1 L of water twice. The obtained wet substance was dissolved in 100 g of methanol, and then 1 L of water was charged to cause reprecipitation, followed by filtration, washing and drying to obtain 82.3 g of a pale yellow powder. As a result of HPLC analysis, it was found that the main component of the powder was a component corresponding to 91.0 area%. The powder contained 0.7% by weight of resorcin. As a result of structural analysis, it was found that the main component in the powder was bis (3-hydroxyphenyl) succinate.

尚、コハク酸ビス(3−ヒドロキシフェニル)エステルの同定データは下記の通りである。
MSスペクトルデータ
EI(Pos.) m/z=302
IRスペクトルデータ
3361cm−1 : 水酸基
2984cm−1 : アルキル
1732cm−1 : エステル
NMRスペクトルデータを表2−1及び表2−2に示した。
The identification data of succinic acid bis (3-hydroxyphenyl) ester is as follows.
MS spectrum data EI (Pos.) M / z = 302
IR spectrum data 3361 cm −1: hydroxyl group 2984 cm −1: alkyl 1732 cm −1: ester NMR spectrum data are shown in Table 2-1 and Table 2-2.

Figure 0004866009
Figure 0004866009

(実施例5)
レゾルシン330.3g(3.0mol)をピリジン303.7gに溶解した溶液を氷浴上で15℃以下に保ちながら、これにセバシン酸ジクロライド71.7g(0.3mol)を徐々に滴下した。滴下終了後、得られた反応混合物を室温まで昇温し、1昼夜放置し反応を完結させた。反応混合物から、ピリジンを減圧下に留去し、残留物に水250gを加えて氷冷すると沈殿が析出した。析出した沈殿をろ過、水洗し、得られた湿体を減圧乾燥して、白色〜淡黄色の粉体102.8gを得た。HPLC分析の結果、粉体の主成分は98.7面積%に相当する成分であることがわかった。また、この粉体中にはレゾルシンが0.2重量%含まれていた。構造解析の結果、粉体中の主成分はセバシン酸ビス(3−ヒドロキシフェニル)エステルである事が判った。
(Example 5)
While maintaining a solution obtained by dissolving 330.3 g (3.0 mol) of resorcin in 303.7 g of pyridine on an ice bath at 15 ° C. or lower, 71.7 g (0.3 mol) of sebacic acid dichloride was gradually added dropwise thereto. After completion of the dropping, the resulting reaction mixture was warmed to room temperature and allowed to stand for one day to complete the reaction. From the reaction mixture, pyridine was distilled off under reduced pressure, 250 g of water was added to the residue, and the mixture was cooled with ice to precipitate. The deposited precipitate was filtered and washed with water, and the obtained wet body was dried under reduced pressure to obtain 102.8 g of a white to pale yellow powder. As a result of HPLC analysis, it was found that the main component of the powder was a component corresponding to 98.7 area%. The powder contained 0.2% by weight of resorcin. As a result of structural analysis, it was found that the main component in the powder was sebacic acid bis (3-hydroxyphenyl) ester.

尚、セバシン酸ビス(3−ヒドロキシフェニル)エステルの同定データは下記の通りである。
MSスペクトルデータ
EI(Pos.) m/z=386
IRスペクトルデータ
3380cm−1 : 水酸基
3000〜2800cm−1 : 長鎖アルキル
1732、1749cm−1 : エステル
NMRスペクトルデータを表3−1および表3−2に示した。
The identification data of sebacic acid bis (3-hydroxyphenyl) ester is as follows.
MS spectrum data EI (Pos.) M / z = 386
IR spectrum data 3380 cm-1: hydroxyl group 3000-2800 cm-1: long chain alkyl 1732, 1749 cm-1: ester NMR spectrum data are shown in Table 3-1 and Table 3-2.

Figure 0004866009
Figure 0004866009

(参考例1〜5)
実施例1〜5で製造した組成物を供試化合物として2200mLのバンバリーミキサーを使用して、表4に示すゴム配合処方で混練り混合して、未加硫のゴム組成物を調製し、以下の方法で耐ブルーム性、ムーニー粘度、配合直後の接着性及び、配合ゴム放置後の接着性を測定、評価した。結果を表4に示す。
(Reference Examples 1-5)
Using a 2200 mL Banbury mixer with the compositions produced in Examples 1 to 5 as test compounds, kneading and mixing with the rubber compounding formulation shown in Table 4 to prepare an unvulcanized rubber composition, In this way, bloom resistance, Mooney viscosity, adhesiveness immediately after compounding, and adhesiveness after leaving the compounded rubber were measured and evaluated. The results are shown in Table 4.

(耐ブルーム性)
未加硫のゴム組成物を40℃で7日間貯蔵した後、配合剤がゴム表面に析出したか否かを目視で確認し、○、△、×で判定した。
○:表面に配合剤が析出していない
△:一部に析出
×:全面に配合剤が析出
(Broom resistance)
After storing the unvulcanized rubber composition at 40 ° C. for 7 days, whether or not the compounding agent was deposited on the rubber surface was visually confirmed, and judged by ○, Δ, and ×.
○: No compounding agent is deposited on the surface Δ: Partly deposited ×: The compounding agent is deposited on the entire surface

(ムーニー粘度)
未加硫のゴム組成物をJIS K6300−2001に準拠して、ML(1+4)130℃を測定した。結果は数値が低い程良好であることを示す。
(Mooney viscosity)
The unvulcanized rubber composition was measured for ML (1 + 4) 130 ° C. according to JIS K6300-2001. A result shows that it is so favorable that a numerical value is low.

(接着試験)
黄銅(Cu;63質量%、Zn;37質量%)メッキしたスチールコード(1×5構造、素線径0.25mm)を12.5mm間隔で平行に並べ、このスチールコードを上下両側から各ゴム組成物でコーティングして、これを直ちに160℃×15分の条件で加硫し、幅12.5mmのサンプルを作製した。下記の各接着性に対してASTM−D−2229に準拠して、各サンプルに対してスチールコードを引き抜き、ゴムの被覆状態を目視で観察して、0〜100%で表示し、各接着性の指標とした。数値が大きい程良好であることを示す。初期接着性は前記加硫の直後に測定した。湿熱接着性は前記加硫後、70℃、湿度100%RH、4日の湿熱条件下で老化させた後に測定した。
(Adhesion test)
Steel cords (1x5 structure, strand diameter 0.25mm) plated with brass (Cu; 63% by mass, Zn: 37% by mass) are arranged in parallel at 12.5mm intervals. After coating with the composition, this was immediately vulcanized under conditions of 160 ° C. × 15 minutes to prepare a sample having a width of 12.5 mm. In accordance with ASTM-D-2229 for each of the following adhesive properties, a steel cord is pulled out from each sample, and the state of rubber coating is visually observed and displayed at 0 to 100%. It was used as an index. It shows that it is so favorable that a numerical value is large. Initial adhesion was measured immediately after the vulcanization. The wet heat adhesiveness was measured after aging, after aging at 70 ° C., 100% RH, 4 days of wet heat conditions.

(接着安定性試験)
前記スチールコードを上下両側から各ゴム組成物でコーティングした未加硫状態のスチールコード−ゴム複合体を、40℃×80RH%の恒温恒湿槽に7日間放置後、160℃×15分間加硫して、初期接着性を測定し、接着安定性の指標とした。
(Adhesion stability test)
The steel cord-rubber composite in an unvulcanized state in which the steel cord is coated with each rubber composition from the upper and lower sides is left in a constant temperature and humidity bath of 40 ° C. × 80 RH% for 7 days, and then vulcanized at 160 ° C. for 15 minutes. Then, initial adhesiveness was measured and used as an index of adhesive stability.

(比較例1)
供試化合物として本発明の組成物を使用しない以外は参考例と同様に配合してゴム組成物を調製し、評価した。結果を表4に示す。
(Comparative Example 1)
A rubber composition was prepared and evaluated in the same manner as in the Reference Example except that the composition of the present invention was not used as a test compound. The results are shown in Table 4.

(比較例2)
供試化合物としてレゾルシンをゴム基本配合に2質量部配合する以外は参考例と同様に配合してゴム組成物を調製し、評価した。結果を表4に示す。
(Comparative Example 2)
A rubber composition was prepared and evaluated in the same manner as in the Reference Example except that resorcin as a test compound was mixed in 2 parts by mass in the basic rubber compound. The results are shown in Table 4.

(比較例3)
供試化合物としてRF樹脂をゴム基本配合に2質量部配合する以外は参考例と同様に配合してゴム組成物を調製し、評価した。結果を表4に示す。なお、RF樹脂は下記の方法で製造した。
(Comparative Example 3)
A rubber composition was prepared and evaluated in the same manner as in the Reference Example except that 2 parts by mass of RF resin was added to the basic rubber compound as a test compound. The results are shown in Table 4. In addition, RF resin was manufactured with the following method.

まず、水1100g、レゾルシン1100g(10mol)、p−トルエンスルホン酸1.72g(10mmol)を冷却管、攪拌装置、温度計、滴下ロート、窒素導入管を備えた4つ口フラスコに仕込み、70℃まで昇温した。37%ホルマリン溶液を477g(5.9mol)を2時間かけて滴下し、そのままの温度で5時間保持し、反応を完結させた。反応終了後、10%水酸化ナトリウム水溶液を4g加え中和した後、冷却器をディーンスターク型還流器に変え、水を留去しながら150℃まで昇温し、更に20mmHgの減圧下で1時間かけて水を除去し、RF樹脂を得た。得られたRF樹脂の軟化点は124℃、残存レゾルシン量は17%であった。   First, 1100 g of water, 1100 g (10 mol) of resorcin, and 1.72 g (10 mmol) of p-toluenesulfonic acid were charged into a four-necked flask equipped with a cooling tube, a stirrer, a thermometer, a dropping funnel, and a nitrogen introducing tube, and 70 ° C. The temperature was raised to. 477 g (5.9 mol) of 37% formalin solution was added dropwise over 2 hours, and kept at the same temperature for 5 hours to complete the reaction. After the completion of the reaction, 4 g of 10% aqueous sodium hydroxide solution was added to neutralize, and then the condenser was changed to a Dean-Stark type refluxing device. The temperature was raised to 150 ° C. while distilling off water, and further under reduced pressure of 20 mmHg for 1 hour. Water was removed to obtain an RF resin. The obtained RF resin had a softening point of 124 ° C. and a residual resorcin content of 17%.

(比較例4)
供試化合物として特開平7−118621号公報記載の混合ポリエステルをゴム基本配合に2質量部配合する以外は実施例と同様に配合してゴム組成物を調製し、評価した。結果を表4に示す。尚、混合ポリエステルは上記特許記載の実施例1に準じて合成した。
(Comparative Example 4)
A rubber composition was prepared and evaluated in the same manner as in the examples except that 2 parts by mass of the mixed polyester described in JP-A-7-118621 as a test compound was mixed in the basic rubber compound. The results are shown in Table 4. The mixed polyester was synthesized according to Example 1 described in the above patent.

還流冷却器および温度計を備えた300mlの4つ口フラスコに、レゾルシン108.9g(0.99mol)、アジピン酸131.4g(0.90mol)、無水酢酸222.0g(2.175mol)およびピリジン0.54g(レゾルシンに対して0.5重量%)を仕込み、窒素置換後、室温で15分攪拌し、その後100℃に昇温して同温度で2hrアセチル化を行なった。その後、副生する酢酸を系外に留去しながら昇温し140℃で1hr、さらに昇温し240℃で2hr熟成した。次いで、減圧下(50mmHg)240℃で熟成を続けた。反応混合物を磁性皿に排出し、黄土色のあめ状物195.6gを得た。ガラス棒で練る事で徐々に結晶化した。分析の結果、レゾルシンを0.1重量%、レゾルシンモノアセテートを0.5重量%、レゾルシンジアセテートを0.8重量%含んでいた。また、GPCにて分子量を測定した結果、重量平均分子量は約30000(PS換算)であった。   A 300 ml four-necked flask equipped with a reflux condenser and a thermometer was charged with 108.9 g (0.99 mol) of resorcin, 131.4 g (0.90 mol) of adipic acid, 222.0 g (2.175 mol) of acetic anhydride and 0.54 g of pyridine. (0.5% by weight based on resorcin) was charged, and after substitution with nitrogen, the mixture was stirred at room temperature for 15 minutes, then heated to 100 ° C. and subjected to 2 hr acetylation at the same temperature. Thereafter, the temperature was raised while distilling acetic acid produced as a by-product out of the system, and the mixture was further aged at 140 ° C. for 1 hr and further at 240 ° C. for 2 hr. Next, aging was continued at 240 ° C. under reduced pressure (50 mmHg). The reaction mixture was discharged into a magnetic dish to obtain 195.6 g of an ocher candy. It gradually crystallized by kneading with a glass rod. As a result of the analysis, it contained 0.1% by weight of resorcin, 0.5% by weight of resorcin monoacetate, and 0.8% by weight of resorcin diacetate. Moreover, as a result of measuring molecular weight by GPC, the weight average molecular weight was about 30000 (PS conversion).

Figure 0004866009
Figure 0004866009

Claims (6)

下記一般式(2)で表される化合物。
Figure 0004866009


(式中、Rは炭素数1〜16の2価の脂肪族基を表す。)
A compound represented by the following general formula (2) .
Figure 0004866009


(In the formula, R represents a divalent aliphatic group having 1 to 16 carbon atoms.)
上記一般式(2)中のRが炭素数2〜10のアルキレン基である請求項1に記載の化合物。 The compound according to claim 1 , wherein R in the general formula (2) is an alkylene group having 2 to 10 carbon atoms. 上記一般式(2)中のRがエチレン基、ブチレン基およびオクチレン基のいずれかである請求項1に記載の化合物。 The compound according to claim 1 , wherein R in the general formula (2) is any one of an ethylene group, a butylene group, and an octylene group. 上記一般式(2)で表される化合物が60〜100重量%、下記一般式(3)で表され且つn=2の化合物が0〜20重量%、下記一般式(3)で表され且つn=3の化合物が0〜10重量%及び下記一般式(3)で表され且つn=4〜6の化合物が合計で0〜10重量%からなる組成物(但し、該組成物は、上記一般式(2)で表される化合物が100重量%である純物質を包含しない)
Figure 0004866009
(式中、Rは炭素数1〜16の2価の脂肪族基を表し、nは2〜6の整数を示す。)

The compound represented by the general formula (2) is represented by 60 to 100% by weight, represented by the following general formula (3), and the compound of n = 2 is represented by 0 to 20% by weight, represented by the following general formula (3) and A composition in which 0 to 10% by weight of a compound of n = 3 and the following general formula (3) and a total of 0 to 10% by weight of compounds of n = 4 to 6 (provided that the composition is It does not include a pure substance in which the compound represented by the general formula (2) is 100% by weight) .
Figure 0004866009
(In the formula, R represents a divalent aliphatic group having 1 to 16 carbon atoms, and n represents an integer of 2 to 6.)

上記一般式(2)および上記一般式(3)中のRが炭素数2〜10のアルキレン基である請求項4に記載の組成物。 The composition according to claim 4 , wherein R in the general formula (2) and the general formula (3) is an alkylene group having 2 to 10 carbon atoms. 上記一般式(2)および上記一般式(3)中のRがエチレン基、ブチレン基またはオクチレン基である請求項4に記載の組成物。 The composition according to claim 4 , wherein R in the general formula (2) and the general formula (3) is an ethylene group, a butylene group, or an octylene group.
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