JP5248137B2 - 潤滑油用酸化防止剤組成物及びそれを含有する潤滑油組成物 - Google Patents
潤滑油用酸化防止剤組成物及びそれを含有する潤滑油組成物 Download PDFInfo
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- JP5248137B2 JP5248137B2 JP2008040374A JP2008040374A JP5248137B2 JP 5248137 B2 JP5248137 B2 JP 5248137B2 JP 2008040374 A JP2008040374 A JP 2008040374A JP 2008040374 A JP2008040374 A JP 2008040374A JP 5248137 B2 JP5248137 B2 JP 5248137B2
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- 125000005065 undecenyl group Chemical group C(=CCCCCCCCCC)* 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
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Description
で表わされるアミン化合物である(X)成分及び、
下記の一般式(2)
で表わされる1つ以上のエステル基を含有するフェノール化合物である(Y)成分を含有することを特徴とする潤滑油用酸化防止剤組成物である。
一般式(1)のR1は、水素原子又はメチル基を表わすが、酸化防止性能が高いことから、水素原子であることが好ましい。
と、上記B(OH)Pで表わされるアルコールとのエステル化反応又はエステル交換反応で合成することが好ましい。反応としては、公知のエステル化反応あるいはエステル交換反応を使用することができる。
下記に実験に使用した化合物A−1〜D−3を記す。
<アミン化合物>
A−1:トリス(2,2,6,6―テトラメチル―4―ピペリジル)・モノ(イソトリ
デシル)―1,2,3,4―ブタンテトラカルボキシレート
A−2:ビス(1,2,2,6,6―ペンタメチル―4―ピペリジル)・ジ(イソトリ
デシル)―1,2,3,4―ブタンテトラカルボキシレート
A−3:ビス(2,2,6,6―テトラメチル―4―ピペリジル)・ジ(イソトリデシ
ル)―1,2,3,4―ブタンテトラカルボキシレート
A−4:ビス(2,2,6,6―テトラメチル―4―ピペリジル)・モノ(イソトリデ
シル)トリメリテート
A−5:ビス(2,2,6,6―テトラメチル―4―ピペリジル)・ジ(オクチル)―
1,2,3,4―ブタンテトラカルボキシレート
A−6:ビス(2,2,6,6―テトラメチル―4―ピペリジル)・ジ(直鎖トリデシ
ル)―1,2,3,4―ブタンテトラカルボキシレート
A−7:ビス(2,2,6,6―テトラメチル―4―ピペリジル)・ジ(オレイル)―
1,2,3,4―ブタンテトラカルボキシレート
A−8:モノ(2,2,6,6―テトラメチル―4―ピペリジル)・モノ(イソトリデ
シル)−セバケート
B−1:p,p'−ジオクチルジフェニルアミン
B−2:トリス(2,2,6,6―テトラメチル―4―ピペリジル)―トリメリテート
B−3:テトラ(2,2,6,6―テトラメチル―4―ピペリジル)―1,2,3,4
―ブタンテトラカルボキシレート
B−4:ビス(2,2,6,6―テトラメチル―4―ピペリジル)−セバケート
C−1:オクタデシル−3−(3,5−ジターシャリブチル−4−ヒドロキシフェノー
ル)プロピオネート
C−2:デシル−3−(3,5−ジターシャリブチル−4−ヒドロキシフェノール)プ
ロピオネート
C−3:テトラキス−(メチレン−3−(3',5'−ジターシャリブチル−4'−ヒ
ドロキシフェニル)プロピオネート)メタン
D−1:2,6−ジターシャリブチル−p−クレゾール
D−2:1,3,5−トリメチル−2,4,6−トリス(3,5−ジターシャリブチル
−4−ヒドロキシベンジル)ベンゼン
D−3:d−α−トコフェノール
攪拌器、還流冷却器、温度計及び窒素導入管を備えた容量1リットルの4口フラスコに、1,2,2,6,6−ペンタメチル−4−ヒドロキシピペリジン51.3g(0.3モル)、イソトリデカノール15.8g(0.1モル)、及びテトライソプロポキシチタン3.35g(0.0118モル)を芳香族系溶媒(出光石油化学(株)製、イプゾール)125gに溶解し、1,2,3,4−ブタンテトラカルボン酸23.4g(0.1モル)のメタノール溶液を175℃で3時間かけて滴下し、さらに1時間反応後、4時間減圧脱水反応した。反応終了後、130℃まで冷却して、水1.27gを加え、触媒を失活して、80℃までさらに冷却して水20gで3回洗浄した。油水分離後、有機層を175℃まで加熱減圧して脱水、脱溶媒して化合物A−1を得た。
攪拌器、還流冷却器、温度計及び窒素導入管を備えた容量3リットルの4口フラスコに、3−(3’,5’−ジ第三ブチル−4’−ヒドロキシフェニル)プロピオン酸メチル1000g(3.42モル)とオクタデカノール923.4g(3.42モル)、リチウムメトキシド2.1g(55ミリモル)を仕込み、IP−1620(出光石油化学(株)製、脂肪族炭化水素系溶媒、沸点166℃〜205℃)を400g加え、100℃〜190℃で10mmHgまで徐々に減圧しながら8時間攪拌した。さらに210℃で2mmHgまで減圧して脱溶媒した後、100℃まで冷却して酢酸を加えて中和した。トルエン800gを加えて溶解後、水100gで3回水洗した。その後、加熱減圧により脱トルエンして化合物C−1を得た。
なお、実施例2,6,7および8は参考例である。
上記の表1及び表2のとおりに配合した試験油を、下記の<酸化劣化試験−2>の方法で酸化劣化試験を行った。結果を表3に記す。また、同様の試験油を、下記の<酸化劣化試験−1>の方法によって強制的に高温で酸化劣化させた後、<酸化劣化試験−2>の方法で酸化劣化試験を行い、高温での影響を比較した。結果を表4に記す。
上記試験油をそれぞれ、JIS K−2514(潤滑油−酸化安定度試験方法)に準拠して、触媒として銅板と鉄板を入れたガラス容器に試料250mlを入れ、1300rpmで空気を巻き込むよう攪拌しながら、180℃で24時間加熱することにより、試験油を酸化劣化させた。
ガラス製内筒管の入った100mlのオートクレーブに、上記試験油をそれぞれ5g入れ、圧力センサー及び排気管の取り付けてある蓋で密閉した。真空ポンプを使用してオートクレーブ内の空気を排気管から排出し、代わりに酸素を入れ、オートクレーブ内を100%酸素雰囲気下にし、同時に圧力を101kPaにした。このオートクレーブを150℃の恒温槽に入れて1時間おきに圧力をチェックした。酸化劣化が進むと酸素が消費され、圧力が減少するので、圧力の減少より酸化劣化の進行具合が判断できる。試験は、圧力が100kPaを切った時点で終了とした。なお、0時間の圧力が150kPaになっているのは、150℃の加熱により、容器内の圧力が熱膨張によって上がっているためである。また、分析に使用した機器は以下の通りである。
圧力計 :AP−10S、AP−V80(キーエンス社製)
データ収集装置:NR−600(キーエンス社製)
Claims (2)
- 下記の一般式(1)
で表わされるアミン化合物である(X)成分及び、
下記の一般式(2)
で表わされる1つ以上のエステル基を含有するフェノール化合物である(Y)成分を含有することを特徴とする潤滑油用酸化防止剤組成物。 - 請求項1記載の(X)成分及び(Y)成分を、基油に対してそれぞれ0.1質量%〜5質量%配合することを特徴とする潤滑油組成物。
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