JPH04300996A - 冷凍機油組成物 - Google Patents

冷凍機油組成物

Info

Publication number
JPH04300996A
JPH04300996A JP3089070A JP8907091A JPH04300996A JP H04300996 A JPH04300996 A JP H04300996A JP 3089070 A JP3089070 A JP 3089070A JP 8907091 A JP8907091 A JP 8907091A JP H04300996 A JPH04300996 A JP H04300996A
Authority
JP
Japan
Prior art keywords
acid
carboxylic acid
refrigerating machine
oil composition
metal salt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3089070A
Other languages
English (en)
Other versions
JP2911629B2 (ja
Inventor
Takamichi Seiki
啓通 清木
Masato Kaneko
正人 金子
Hideo Kanamori
英夫 金森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP3089070A priority Critical patent/JP2911629B2/ja
Priority to TW081101115A priority patent/TW217419B/zh
Priority to EP92104856A priority patent/EP0507158B1/en
Priority to DE69221656T priority patent/DE69221656T2/de
Priority to EP96111075A priority patent/EP0739973B1/en
Priority to DE69232821T priority patent/DE69232821T2/de
Priority to KR1019920004719A priority patent/KR970010867B1/ko
Priority to US07/859,100 priority patent/US5310492A/en
Publication of JPH04300996A publication Critical patent/JPH04300996A/ja
Application granted granted Critical
Publication of JP2911629B2 publication Critical patent/JP2911629B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
    • C10M129/40—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms monocarboxylic
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    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、冷凍機油組成物に関し
、詳しくは環境汚染で問題となっている冷媒のジクロロ
ジフルオロメタン（以下フロン１２と称す）等のフロン
代替物となりうる１，１，１，２−テトラフルオロエタ
ン（以下、フロン１３４ａと称す）等の水素含有フロン
化合物（フッ化アルカン）との相溶性が良好で、かつ耐
摩耗性，潤滑性能及びフロン雰囲気での安定性に優れた
冷凍機油組成物に関するものである。
【０００２】
【従来の技術および発明が解決しようとする課題】近年
、環境汚染のおそれのないフロン１３４ａ等の水素含有
フロン冷媒を用いる冷凍機の潤滑油として、ポリオキシ
アルキレングリコール誘導体が、上記水素含有フロン冷
媒との相溶性が高い点で有効であることが報告されてい
る（米国特許第４，７５５，３１６　号明細書）。しか
しながら、これらのポリオキシアルキレングリコール誘
導体は、上記の冷媒雰囲気下では、耐摩耗性に劣り、特
にカーエアコンや電気冷蔵庫など冷凍機のアルミニウム
材と鋼材との間の摩耗を増大させ、実用上大きな問題と
なっている。このアルミニウム材と鋼材の摩擦部分は、
レシプロタイプの圧縮機（特に斜板式）では、ピストン
とピストンシュー，斜板とシュー部分など、ロータリー
タイプの圧縮機では、ベーンとハウジング部分などに使
用されており、潤滑上重要な要素である。一方、耐摩耗
性向上剤は種々のものが知られているが、フロン雰囲気
という特殊条件下でアルミニウム材と鋼材との摩耗を安
定性を害することなく防止できるという手段は知られて
いない。
【０００３】
【課題を解決するための手段】本発明者らは、フロン１
３４ａ等の水素含有フロン冷媒との相溶性にすぐれると
ともに、潤滑性能にすぐれ、しかも耐摩耗性、特にアル
ミニウム材と鋼材との間の耐摩耗性向上に有効な冷凍機
油（潤滑油）を開発すべく鋭意研究を重ねた。その結果
、特定の基油に特定のカルボン酸の金属塩を配合するこ
とによって、上記目的を達成できることを見出した。 本発明はかかる知見に基いて完成したものである。
【０００４】すなわち本発明は、基油に、炭素数３〜６
０のカルボン酸の金属塩を配合したことを特徴とする冷
凍機油組成物を提供するものである。本発明の冷凍機油
組成物の基油は、一般に冷凍機油として用いられるもの
であればよく、その種類や性状については、特に限定さ
れるものではないが、好ましくは４０℃における動粘度
が５〜１０００ｃＳｔ　であり、特に好ましくは１０〜
５００ｃＳｔの鉱油及び／又は合成油である。また、こ
の基油の低温流動性の指標である流動点に関しては、特
に制限はないが、−１０℃以下であることが望ましい。
【０００５】このような鉱油及び合成油は、各種のもの
があり、用途等に応じて適宜選定すればよい。その好適
なものとして、例えば、鉱油としてはパラフィン系鉱油
，ナフテン系鉱油などが挙げられ、合成油としてはポリ
オキシアルキレン誘導体，エステル化合物（特にポリエ
ステル化合物），アルキルベンゼン，アルキルナフタレ
ン，ポリ−α−オレフィンなどが挙げられるが、特にポ
リオキシアルキレン誘導体やポリエステル化合物が好ま
しい。ここで上記ポリオキシアルキレン誘導体には、ポ
リオキシアルキレングリコール，そのモノアルキルエー
テル（分子片末端にアルキルエーテルが形成されたもの
），ジアルキルエーテル（分子両末端にアルキルエーテ
ルが形成されたもの）などがあり、またそのオキシアル
キレン単位としては、オキシエチレン，オキシプロピレ
ン，オキシブチレンあるいはこれら２種以上の混合物（
例えばオキシエチレンとオキシプロピレンとが共重合し
たもの）などが挙げられる。一方、ポリエステル化合物
としては、各種のものがあり、用途等に応じて適宜選定
すればよい。その好適なものとしては、下記の（Ｉ）〜
（Ｖ）の反応生成物をあげることができる。 （Ｉ）■多価カルボン酸あるいはその誘導体，■多価ア
ルコールあるいはその誘導体および■一価脂肪酸あるい
はその誘導体の反応生成物 （ＩＩ）■多価カルボン酸あるいはその誘導体，■多価
アルコールあるいはその誘導体および■一価脂肪族アル
コールあるいはその誘導体の反応生成物 （ＩＩＩ）■多価アルコールあるいはその誘導体および
■一価脂肪酸あるいはその誘導体の反応生成物（好まし
くは当量反応生成物） （ＩＶ）■一価脂肪族アルコールあるいはその誘導体お
よび■多価カルボン酸あるいはその誘導体の反応生成物
（Ｖ）■多価カルボン酸あるいはその誘導体および■多
価アルコールあるいはその誘導体の反応生成物
【０００
６】本発明は、上記基油にカルボン酸の金属塩を配合す
ることを特徴としている。ここで用いられるカルボン酸
の金属塩は、炭素数３〜６０のカルボン酸、好ましくは
炭素数６〜３０、より好ましくは１２〜３０の脂肪酸の
金属塩である。また前記脂肪酸のダイマー酸やトリマー
酸並びに炭素数３〜３０のジカルボン酸の金属塩をあげ
ることができる。これらのうち炭素数１２〜３０の脂肪
酸及び炭素数３〜３０のジカルボン酸の金属塩が特に好
ましい。一方、上記金属塩の金属については、アルカリ
金属あるいははアルカリ土類金属であるものが好ましく
、特にアルカリ金属塩が最適である。
【０００７】上記基油に配合されるカルボン酸の金属塩
を構成するカルボン酸としては、上述の如く各種のもの
があり、例えば、脂肪族飽和モノカルボン酸，脂肪族不
飽和カルボン酸，脂肪族ジカルボン酸，芳香族カルボン
酸などが挙げられる。さらに、具体例を挙げると、脂肪
族飽和モノカルボン酸としてはカプロン酸；カプリル酸
；カプリン酸；ラウリル酸；ミリスチン酸；パルミチン
酸；ステアリン酸；アラキン酸；セロチン酸；ラクセル
酸等の直鎖飽和酸、あるいはイソペンタン酸；２−メチ
ルペンタン酸；２−メチルブタン酸；２，２−ジメチル
ブタン酸；２−メチルヘキサン酸；５−メチルヘキサン
酸；２，２−ジメチルヘプタン酸；２−エチル−２−メ
チルブタン酸；２−エチルヘキサン酸；ジメチルヘキサ
ン酸；２−ｎ−プロピル−ペンタン酸；３，５，５トリ
メチルヘキサン酸；ジメチルオクタン酸；イソトリデカ
ン酸；イソミリスチン酸；イソステアリン酸；イソアラ
キン酸；イソヘキサン酸等の分岐脂肪酸が挙げられる。 また脂肪族不飽和カルボン酸としてはパルミトレイン酸
；オレイン酸；エライジン酸；リノール酸；リノレン酸
など、さらにはリシノール酸などの不飽和ヒドロキシ酸
が挙げられる。また、脂肪族ジカルボン酸としてはアジ
ピン酸，アゼライン酸，セバシン酸が挙げられ、芳香族
カルボン酸としては安息香酸，フタル酸，トリメリット
酸，ピロメリット酸などが挙げられる。また、ナフテン
酸などの脂環式脂肪酸を用いることもできる。本発明で
は、上記のカルボン酸を目的に応じて適宜二種以上組み
合わせて用いてもよい。
【０００８】上記カルボン酸と結合して金属塩を構成す
る金属も、特に限定されるものではなく各種のものが挙
げられる。例えば、リチウム，カリウム，ナトリウムな
どアルカリ金属、マグネシウム，カルシウム，ストロン
チウムなどアルカリ土類金属、他の金属として亜鉛，ニ
ッケル，アルミニウムなどを挙げることができる。本発
明では、上記カルボン酸一種あたりに化合される金属は
、一種に限らず二種以上であってもよく、目的に応じて
適宜選定することができる。ここで、本発明に用いられ
る金属として好ましいものは、アルカリ金属及びアルカ
リ土類金属であり、特にアルカリ金属が最適である。 本発明の冷凍機油組成物において、上記カルボン酸及び
金属からなるカルボン酸の金属塩の配合量は、目的に応
じて適宜選定可能であるが、好ましくは組成物全体に対
して０．００１〜１０重量％、特に好ましくは０．００
５〜３重量％である。ここで、上記配合量が０．００１
重量％未満の場合、耐摩耗性が充分でないという不都合
があり、１０重量％を超えると安定性を低下させるとい
う問題がある。
【０００９】本発明の組成物を製造する方法は、上記基
油に上記カルボン酸の金属塩を配合すればよく、様々な
方法によることができる。しかし、基油に対してカルボ
ン酸の金属塩の溶解性を向上させるために、以下の方法
で組成物を製造することが有効である。但し、以下の製
造方法は、本発明の組成物を製造する多々ある方法の一
つである。まず、カルボン酸の金属塩を予め溶解させて
おくため、溶媒にカルボン酸及び水酸化アルカリとを投
入して、室温又は加温下で反応させて、カルボン酸の金
属塩を溶媒に溶解あるいは分散した状態で形成する。次
に上記溶媒に溶解，分散しているカルボン酸金属塩をそ
のまま、基油に配合し、混合分散する。このように、カ
ルボン酸の金属塩を予め溶媒に溶解あるいは分散させ、
しかる後に、基油に上記金属塩溶液あるいは分散液を配
合することにより、効率よく目的の組成物を製造するこ
とができる。
【００１０】ここで用いる溶媒は、種々のものがあり、
例えば、一価アルコール類としてはｎ−ブチルアルコー
ル；ｉｓｏ−ブチルアルコール；ｓｅｃ−ブチルアルコ
ール；ｔ−ブチルアルコール；ｎ−アミルアルコール；
ｉｓｏ−アミルアルコール；ｓｅｃ−アミルアルコール
；ｎ−ヘキシルアルコール；メチルアミルアルコール；
エチルブチルアルコール；ヘプチルアルコール；ｎ−オ
クチルアルコール；ｓｅｃ−オクチルアルコール；２−
エチルヘキシルアルコール；ｉｓｏ−オクチルアルコー
ル；ｎ−ノニルアルコール；２，６−ジメチル−４−ヘ
プタノール；ｎ−デシルアルコール；シクロヘキサノー
ルなど、グリコール類及び多価アルコール類としてはエ
チレングリコール；ジエチレングリコール；トリエチレ
ングリコール；テトラエチレングリコール；プロピレン
グリコール；ジプロピレングリコール；１，４−ブチレ
ングリコール；２，３−ブチレングリコール；ヘキシレ
ングリコール；オクチレングリコール；グリセリンなど
、セロソルブ類としてはエチレングリコールモノメチル
エーテル；エチレングリコールエチルエーテル；エチレ
ングリコールジエチルエーテル；エチレングリコールブ
チルエーテル；エチレングリコールジブチルエーテル；
エチレングリコールフェニルエーテル；エチレングリコ
ールベンジルエーテル；エチレングリコールエチルヘキ
シルエーテル；ジエチレングリコールメチルエーテル；
ジエチレングリコールエチルエーテル；ジエチレングリ
コールジエチルエーテル；ジエチレングリコールブチル
エーテル；ジエチレングリコールジブチルエーテル；プ
ロピレングリコールメチルエーテル；プロピレングリコ
ールエチルエーテル；プロピレングリコールブチルエー
テル；ジプロピレングリコールメチルエーテル；ジプロ
ピレングリコールエチルエーテル；トリプロピレングリ
コールメチルエーテル；テトラエチレングリコールジメ
チルエーテル；テトラエチレングリコールジブチルエー
テルなどが挙げられる。さらに、クラウンエーテル類と
してはベンゾ−１５−クラウン−５，ベンゾ−１２−ク
ラウン−４，ベンゾ−１５−クラウン−５，ベンゾ−１
８−クラウン−６，ジベンゾ−１８−クラウン−６など
、ケトン類としてはエチルブチルケトン，ジプロピルケ
トン，メチルアミルケトン，メチルヘキシルケトン，ジ
イソブチルケトンなど、脂肪酸類としては前記炭素数６
〜３０の脂肪酸などが挙げられる。以上の如き溶媒に溶
解あるいは分散させる上記金属塩の濃度は、特に限定さ
れるものではなく各種状況に応じて適宜選定すればよい
。
【００１１】本発明の組成物は、基油にカルボン酸の金
属塩を配合したものであるが、さらに必要に応じて従来
の潤滑油に使用されている各種添加剤、例えば耐荷重添
加剤（極圧剤，油性剤など），塩素捕捉剤，酸化防止剤
，金属不活性化剤，消泡剤，清浄分散剤，粘度指数向上
剤，流動点降下剤，防錆剤，腐食防止剤などを配合する
ことができる。
【００１２】上記耐荷重添加剤としては、モノスルフィ
ド類，ポリスルフィド類，スルホキシド類，スルホン類
，チオスルフィネート類，硫化油脂，チオカーボネート
類，チオフェン類，チアゾール類，メタンスルホン酸エ
ステル類などの有機硫黄化合物系のもの、リン酸モノエ
ステル類，リン酸ジエステル類，リン酸トリエステル類
などのリン酸エステル系のもの、亜リン酸モノエステル
類，亜リン酸ジエステル類，亜リン酸トリエステル類な
どの亜リン酸エステル系のもの、チオリン酸トリエステ
ル類などのチオリン酸エステル系のもの、高級脂肪酸，
ヒドロキシアリール脂肪酸類，金属セッケンなどの脂肪
酸系のもの、アクリル酸エステル類などの脂肪酸エステ
ル系のもの、塩素化炭化水素類，塩素化カルボン酸誘導
体などの有機塩素系のもの、フッ素化脂肪族カルボン酸
類，フッ素化エチレン樹脂，フッ素化アルキルポリシロ
キサン類，フッ素化黒鉛などの有機フッ素系のもの、高
級アルコールなどのアルコール系のもの、ナフテン酸塩
類（ナフテン酸鉛），脂肪酸塩類（脂肪酸鉛），チオリ
ン酸塩類（ジアルキルジチオリン酸亜鉛），チオカルバ
ミン酸塩類，有機モリブテン化合物，有機スズ化合物，
有機ゲルマニウム化合物，ホウ酸エステル類などの金属
化合物系のものがある。塩素捕捉剤としては、グリシジ
ルエーテル基含有化合物，エポキシ化脂肪酸モノエステ
ル類，エポキシ化油脂，エポキシシクロアルキル基含有
化合物などがある。酸化防止剤としては、フェノール類
（２，６−ジターシャリーブチル−ｐ−クレゾール），
芳香族アミン類（α−ナフチルアミン）などがある。金
属不活性化剤としては、ベンゾトリアゾール誘導体など
がある。消泡剤としては、シリコーンオイル（ジメチル
ポリシロキサン），ポリメタクリレート類などがある。 清浄分散剤としては、スルホネート類，フェネート類，
コハク酸イミド類などがある。粘度指数向上剤，流動点
降下剤としては、ポリメタクリレート，ポリイソブチレ
ン，エチレン−プロピレン共重合体，スチレン−ジエン
水素化共重合体などがある。特に、上記添加剤のうち、
リン酸エステル系や亜リン酸エステル系のものが好適で
あり、その添加量は、特に制限はなく適宜選定すればよ
いが、通常は全体の０．１〜５重量％程度である。 ここでリン酸エステル系の化合物は、アルキルホスフェ
ート化合物とアリールホスフェート化合物に大別するこ
とができる。このリン酸エステル系の化合物（ホスフェ
ート化合物）の好適なものとしては、一般式　　（Ｒ１
　Ｏ）３Ｐ＝Ｏ（式中、Ｒ１　は総炭素数１５以上の炭
化水素基又は塩素化炭化水素基，特に炭素数８〜２０の
アルキル基（直鎖，分岐，飽和，不飽和），フェニル基
，炭素数１〜１２のアルキル基置換フェニル基，塩素化
フェニル基，塩素化アルキルフェニル基を示し、また各
Ｒ１　は同じでも異なってもよい。）で表わされる化合
物があげられる。具体的には、トリクレジルホスフェー
ト（ＴＣＰ），トリフェニルホスフェート，トリ−イソ
プロピルフェニルホスフェート，トリオクチルホスフェ
ート，トリラウリルホスフェート，トリステアリルホス
フェート，トリオレイルホスフェート，ジフェニルオク
チルホスフェート，ｏ−，ｍ−，ｐ−モノクロロフェニ
ルホスフェート，ジクロロフェニルホスフェート，モノ
クロロトリルホスフェート，ジクロロトリルホスフェー
トなどが挙げられるが、特にトリクレジルホスフェート
を用いることが好ましい。また、亜リン酸エステル系の
化合物は、アルキルホスファイト化合物とアリールホス
ファイト化合物に大別することができる。この亜リン酸
エステル系の化合物（ホスファイト化合物）の好適なも
のとしては、一般式　　（Ｒ２　Ｏ）３Ｐ　　（式中、
Ｒ２　は水素又は総炭素数１５以上の炭化水素基、特に
炭素数８〜２０のアルキル基（直鎖，分岐，飽和，不飽
和），フェニル基，炭素数１〜１２のアルキル基置換フ
ェニル基を示し、また各Ｒ２　は同じでも異なってもよ
い。但し、Ｒ２　の２つ以上が水素である場合を除く。 ）で表わされる化合物があげられる。具体的には、トリ
オクチルホスファイト，トリラウリルホスファイト，ト
リステアリルホスファイト，トリオレイルホスファイト
，トリフェニルホスファイト，トリクレジルホスファイ
ト，トリス（ノニルフェニル）ホスファイト，ジフェニ
ルデシルホスファイト，ジオクチルハイドロゲンホスフ
ァイト，ジラウリルハイドロゲンホスファイト，ジオレ
イルハイドロゲンホスファイト，ジ（ノニルフェニル）
ハイドロゲンホスファイトなどが挙げられる。
【００１３】
【実施例】次に、実施例により本発明をさらに詳細に説
明するが、本発明はこれらの例によって何ら限定される
ものではない。 実施例１〜１８ ■カルボン酸の金属塩溶液の調製 （１）　溶媒としてジプロピレングリコール、カルボン
酸としてオレイン酸、水酸化アルカリとして水酸化カリ
ウム，水酸化ナトリウム又は水酸化リチウムを用いて、
これらの各水酸化アルカリと反応させて、それぞれオレ
イン酸カリウム，オレイン酸ナトリウム，オレイン酸リ
チウムの３０重量％溶液を調製した（実施例１〜４，７
〜１０，１２，１３，１６，１７）。 （２）　溶媒としてジプロピレングリコール、カルボン
酸としてパルミチン酸、水酸化アルカリとして水酸化カ
リウムを用いて、パルミチン酸カリウムの３０重量％溶
液を調製した（実施例５，６）。 （３）　溶媒としてジプロピレングリコール、カルボン
酸としてセバシン酸、水酸化アルカリとして水酸化カリ
ウムを用いて、セバシン酸カリウムの３０重量％溶液を
調製した（実施例１１）。 （４）　溶媒としてエチレングリコール、カルボン酸と
してオレイン酸、水酸化アルカリとして水酸化カリウム
又は水酸化ナトリウムを用いて、オレイン酸カリウム又
はオレイン酸ナトリウムの３０重量％溶液を調製した（
実施例１４）。 （５）　溶媒としてジエチルエーテル、カルボン酸とし
てオレイン酸、水酸化アルカリとして水酸化リチウムを
用いて、オレイン酸リチウムの３０重量％溶液を調製し
た（実施例１８）。 ■組成物の調製 上記溶液中に溶解，分散している金属塩をそのまま、第
１表に示す基油に配合し、混合分散した。ここで、配合
量は第１表に示す配合量（有効配合量）となるように調
整し、目的とする冷凍機油組成物を調製した。
【００１４】比較例１ オレイン酸カリウムを塩素化パラフィンに代え、また配
合量を変えたこと以外は実施例１と同様の操作を行った
。
【００１５】
【表１】
【００１６】
【表２】
【００１７】＊　　１　　数平均分子量　　　　　　１
２７０＊　　２　　数平均分子量　　　　　　　　６４
０＊　　３　　数平均分子量　　　　　　１３００＊　
　４　　数平均分子量　　　　　　１１００＊　　５　
　１００℃の動粘度　　４．６ｃＳｔ＊　　６　　ネオ
ペンチルグリコール，アジピン酸及び２−メチルカプロ
ン酸のポリエステル　　　　　　　　　　　　　　　　
（９０．５ｃＳｔ（４０℃）） ＊　　７　　ジペンタエリスリトールとｉｓｏ−バレイ
ン酸及びｎ−ヘキサン酸の混合脂肪酸のヘキサエステル
（７０．５ｃＳｔ（４０℃）） ＊　　８　　ナフテン系鉱油　　　　　　　　　　　　
　（　　５．０ｃＳｔ（１００℃）） ＊　　９　　トリクレシルホスフェート＊１０　　トリ
オクチルホスフェート
【００１８】上記実施例１〜１８及び比較例１で得られ
た冷凍機油組成物について、下記試験方法によりアルミ
ニウム材と鋼材間の耐摩耗性，安定性，外観及び高温臨
界溶解温度を測定した。得られた結果を第２表に示す。 （ａ）耐摩耗性 ファレックス耐摩耗性試験で、ブロックをアルミニウム
（Ａ４０３２），ピンを鋼（ＳＵＪ−２）として評価し
た。フロン吹き込み量を１０リットル／時間，荷重を４
００ポンド，時間を１時間、回転数を１２００ｒｐｍ，
油温を８０℃として摩耗量を測定した。 （ｂ）安定性 シールドチューブ試験により評価を行った。試料油と冷
媒（フロン１３４ａ）との２：１混合物を鉄，銅，アル
ミニウムの触媒とともにガラス管に封入し、１７５℃に
おいて２４０時間加熱した後、油と触媒の外観を観察し
、スラッジの有無を調べた。 （ｃ）組成物の外観 組成物の配合を完了してから３０分後の外観を観察し、
くもり及び沈澱等の有無を確認した。 （ｄ）高温臨界溶解温度 内容積約１０ｍｌのガラス製耐圧容器に、試料油と冷媒
（フロン１３４ａ）を１：９の比率（重量）で封入し、
均一に溶解した状態から徐々に温度を上昇させて行き、
試料油と冷媒が分離し始める温度を測定し、高温臨界溶
解温度とした。
【００１９】
【表３】
【００２０】
【発明の効果】本発明の冷凍機油組成物は、フロン１３
４ａ等の水素含有フロン冷媒雰囲気下での安定性，該冷
媒との相溶性および潤滑性能に優れるとともに、特にア
ルミニウム材と鋼材間の耐摩耗性向上に極めて有効に作
用する。更に水分の吸湿性も小さいという利点がある。 したがって、本発明の冷凍機油組成物は、圧縮型冷凍機
をはじめ、水素含有フロン冷媒を用いる各種の冷凍機の
潤滑油として利用される。特に、フロン１３４ａ等の水
素含有フロン化合物（水素含有フッ化アルカン）（具体
的には、上記フロン１３４ａ以外に、１，１，２，２−
テトラフルオロエタン（フロン−１３４）；１，１−ジ
クロロ−２，２，２−トリフルオロエタン（フロン−１
２３）；１−クロロ−１，１−ジフルオロエタン（フロ
ン−１４２ｂ）；１，１−ジフルオロエタン（フロン−
１５２ａ）；クロロジフルオロメタン（フロン−２２）
あるいはトリフルオロメタン（フロン−２３）など）と
の相溶性が良好である。したがって、本発明の冷凍機油
組成物は、各種の水素含有フロン化合物を冷媒として用
いる電気冷蔵庫，クーラー（特にカーエアコン），ヒー
トポンプ等の冷凍機の潤滑油として有効な利用が期待さ
れる。

Claims (6)

    【特許請求の範囲】
  1. 【請求項１】　　基油に、炭素数３〜６０のカルボン酸
    の金属塩を配合したことを特徴とする冷凍機油組成物。
  2. 【請求項２】　　金属塩の金属が、アルカリ金属である
    請求項１記載の冷凍機油組成物。
  3. 【請求項３】　　カルボン酸が、炭素数６〜３０の脂肪
    酸である請求項１又は２記載の冷凍機油組成物。
  4. 【請求項４】　　基油が、ポリオキシアルキレングリコ
    ール誘導体及び／又はポリエステル化合物である請求項
    １記載の冷凍機油組成物。
  5. 【請求項５】　　冷凍機における冷媒が、水素含有フロ
    ン冷媒である請求項１記載の冷凍機油組成物。
  6. 【請求項６】　　水素含有フロン冷媒が、１，１，１，
    ２−テトラフルオロエタンである請求項５記載の冷凍機
    油組成物。
JP3089070A 1991-03-29 1991-03-29 冷凍機油組成物 Expired - Lifetime JP2911629B2 (ja)

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JP3089070A JP2911629B2 (ja) 1991-03-29 1991-03-29 冷凍機油組成物
TW081101115A TW217419B (ja) 1991-03-29 1992-02-17
DE69221656T DE69221656T2 (de) 1991-03-29 1992-03-20 Ölzusammensetzung für Kältemaschinen
EP96111075A EP0739973B1 (en) 1991-03-29 1992-03-20 Refrigerating machine oil composition
EP92104856A EP0507158B1 (en) 1991-03-29 1992-03-20 Refrigerating machine oil composition
DE69232821T DE69232821T2 (de) 1991-03-29 1992-03-20 Ölzusammensetzung für Kältemaschinen
KR1019920004719A KR970010867B1 (ko) 1991-03-29 1992-03-23 냉동기유 조성물
US07/859,100 US5310492A (en) 1991-03-29 1992-03-27 Refrigerating machine oil composition

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EP (2) EP0739973B1 (ja)
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DE (2) DE69232821T2 (ja)
TW (1) TW217419B (ja)

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US4948525A (en) * 1988-04-06 1990-08-14 Nippon Oil Co., Ltd. Lubricating oil compositions for refrigerators
BR9006748A (pt) * 1989-04-25 1991-08-06 Lubrizol Corp Composicao liquida de refrigeracao
US5269955A (en) * 1989-05-08 1993-12-14 Idemitsu Kosan Co., Ltd. Lubricating oil for compression-type refrigerators and polyoxyalkylene glycol derivative
DE3929071A1 (de) * 1989-09-01 1991-03-07 Henkel Kgaa Universalschmiermittel auf der basis einer syntheseoelloesung
JPH03285992A (ja) * 1990-03-31 1991-12-17 Idemitsu Kosan Co Ltd 水素含有フロン冷媒用冷凍機油組成物

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995033801A1 (en) * 1994-06-03 1995-12-14 Harashima, Tomoko Mixed refrigerant composition
KR100429130B1 (ko) * 1996-04-17 2004-07-16 이데미쓰 고산 가부시키가이샤 냉동기유 조성물
JP2000282076A (ja) * 1999-04-01 2000-10-10 Idemitsu Kosan Co Ltd 冷凍機油組成物
WO2008041509A1 (en) * 2006-09-29 2008-04-10 Idemitsu Kosan Co., Ltd. Lubricant for compression refrigerating machine and refrigerating apparatus using the same
WO2008041508A1 (fr) * 2006-09-29 2008-04-10 Idemitsu Kosan Co., Ltd. Lubrifiant destiné à une machine réfrigérante à compression et appareil réfrigérant utilisant ledit lubrifiant
US8491811B2 (en) 2006-09-29 2013-07-23 Idemitsu Kosan Co., Ltd. Lubricant for compression refrigerating machine and refrigerating apparatus using the same
JP5379486B2 (ja) * 2006-09-29 2013-12-25 出光興産株式会社 圧縮型冷凍機用潤滑油、及びそれを用いた冷凍装置
JP5379485B2 (ja) * 2006-09-29 2013-12-25 出光興産株式会社 圧縮型冷凍機用潤滑油、及びそれを用いた冷凍装置
US8926857B2 (en) 2006-09-29 2015-01-06 Idemitsu Kosan Co., Ltd. Lubricant for compression refrigerating machine and refrigerating apparatus using the same
KR20180101384A (ko) 2016-01-15 2018-09-12 이데미쓰 고산 가부시키가이샤 냉동기유, 및 냉동기용 조성물

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EP0739973A1 (en) 1996-10-30
DE69221656T2 (de) 1997-12-11
EP0507158B1 (en) 1997-08-20
TW217419B (ja) 1993-12-11
KR920018203A (ko) 1992-10-21
JP2911629B2 (ja) 1999-06-23
DE69232821D1 (de) 2002-11-21
EP0739973B1 (en) 2002-10-16
DE69221656D1 (de) 1997-09-25
EP0507158A1 (en) 1992-10-07
DE69232821T2 (de) 2003-03-13
US5310492A (en) 1994-05-10
KR970010867B1 (ko) 1997-07-01

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