JPWO2018101342A1 - メタクリル系共重合体溶液の製造方法 - Google Patents
メタクリル系共重合体溶液の製造方法 Download PDFInfo
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- JPWO2018101342A1 JPWO2018101342A1 JP2018554202A JP2018554202A JPWO2018101342A1 JP WO2018101342 A1 JPWO2018101342 A1 JP WO2018101342A1 JP 2018554202 A JP2018554202 A JP 2018554202A JP 2018554202 A JP2018554202 A JP 2018554202A JP WO2018101342 A1 JPWO2018101342 A1 JP WO2018101342A1
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- methacrylic copolymer
- polymer solution
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- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
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- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [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])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- BLHLJVCOVBYQQS-UHFFFAOYSA-N ethyllithium Chemical compound [Li]CC BLHLJVCOVBYQQS-UHFFFAOYSA-N 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- AFRJJFRNGGLMDW-UHFFFAOYSA-N lithium amide Chemical class [Li+].[NH2-] AFRJJFRNGGLMDW-UHFFFAOYSA-N 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- JILPJDVXYVTZDQ-UHFFFAOYSA-N lithium methoxide Chemical compound [Li+].[O-]C JILPJDVXYVTZDQ-UHFFFAOYSA-N 0.000 description 1
- URMHJZVLKKDTOJ-UHFFFAOYSA-N lithium;(3-methyl-1-phenylpentyl)benzene Chemical compound [Li+].C=1C=CC=CC=1[C-](CC(C)CC)C1=CC=CC=C1 URMHJZVLKKDTOJ-UHFFFAOYSA-N 0.000 description 1
- RWAWVCZRBYMUTC-UHFFFAOYSA-N lithium;(4-methylphenyl)methanolate Chemical compound [Li+].CC1=CC=C(C[O-])C=C1 RWAWVCZRBYMUTC-UHFFFAOYSA-N 0.000 description 1
- CCZVEWRRAVASGL-UHFFFAOYSA-N lithium;2-methanidylpropane Chemical compound [Li+].CC(C)[CH2-] CCZVEWRRAVASGL-UHFFFAOYSA-N 0.000 description 1
- LZWQNOHZMQIFBX-UHFFFAOYSA-N lithium;2-methylpropan-2-olate Chemical compound [Li+].CC(C)(C)[O-] LZWQNOHZMQIFBX-UHFFFAOYSA-N 0.000 description 1
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 1
- OONWLILMXMWOMG-UHFFFAOYSA-M lithium;4-methylphenolate Chemical compound [Li+].CC1=CC=C([O-])C=C1 OONWLILMXMWOMG-UHFFFAOYSA-M 0.000 description 1
- LTRVAZKHJRYLRJ-UHFFFAOYSA-N lithium;butan-1-olate Chemical compound [Li+].CCCC[O-] LTRVAZKHJRYLRJ-UHFFFAOYSA-N 0.000 description 1
- XMAFBJJKWTWLJP-UHFFFAOYSA-N lithium;butan-2-olate Chemical compound [Li+].CCC(C)[O-] XMAFBJJKWTWLJP-UHFFFAOYSA-N 0.000 description 1
- AHNJTQYTRPXLLG-UHFFFAOYSA-N lithium;diethylazanide Chemical compound [Li+].CC[N-]CC AHNJTQYTRPXLLG-UHFFFAOYSA-N 0.000 description 1
- YDGSUPBDGKOGQT-UHFFFAOYSA-N lithium;dimethylazanide Chemical compound [Li+].C[N-]C YDGSUPBDGKOGQT-UHFFFAOYSA-N 0.000 description 1
- AZVCGYPLLBEUNV-UHFFFAOYSA-N lithium;ethanolate Chemical compound [Li+].CC[O-] AZVCGYPLLBEUNV-UHFFFAOYSA-N 0.000 description 1
- UUPFWVQZXYTRSK-UHFFFAOYSA-N lithium;heptan-1-olate Chemical compound [Li+].CCCCCCC[O-] UUPFWVQZXYTRSK-UHFFFAOYSA-N 0.000 description 1
- PPXOATAYFFLLBM-UHFFFAOYSA-N lithium;hexan-1-olate Chemical compound [Li+].CCCCCC[O-] PPXOATAYFFLLBM-UHFFFAOYSA-N 0.000 description 1
- CETVQRFGPOGIQJ-UHFFFAOYSA-N lithium;hexane Chemical compound [Li+].CCCCC[CH2-] CETVQRFGPOGIQJ-UHFFFAOYSA-N 0.000 description 1
- YNXURHRFIMQACJ-UHFFFAOYSA-N lithium;methanidylbenzene Chemical compound [Li+].[CH2-]C1=CC=CC=C1 YNXURHRFIMQACJ-UHFFFAOYSA-N 0.000 description 1
- PDZGAEAUKGKKDE-UHFFFAOYSA-N lithium;naphthalene Chemical compound [Li].C1=CC=CC2=CC=CC=C21 PDZGAEAUKGKKDE-UHFFFAOYSA-N 0.000 description 1
- VVKLZHZYBZPWIN-UHFFFAOYSA-N lithium;pentan-1-olate Chemical compound [Li]OCCCCC VVKLZHZYBZPWIN-UHFFFAOYSA-N 0.000 description 1
- XAVQZBGEXVFCJI-UHFFFAOYSA-M lithium;phenoxide Chemical compound [Li+].[O-]C1=CC=CC=C1 XAVQZBGEXVFCJI-UHFFFAOYSA-M 0.000 description 1
- WVHPRHPUFLPMMM-UHFFFAOYSA-N lithium;phenylmethanolate Chemical compound [Li]OCC1=CC=CC=C1 WVHPRHPUFLPMMM-UHFFFAOYSA-N 0.000 description 1
- XWRJSDBMRJIGSK-UHFFFAOYSA-N lithium;phenylmethylbenzene Chemical compound [Li+].C=1C=CC=CC=1[CH-]C1=CC=CC=C1 XWRJSDBMRJIGSK-UHFFFAOYSA-N 0.000 description 1
- MXIRPJHGXWFUAE-UHFFFAOYSA-N lithium;propan-1-olate Chemical compound [Li+].CCC[O-] MXIRPJHGXWFUAE-UHFFFAOYSA-N 0.000 description 1
- HAUKUGBTJXWQMF-UHFFFAOYSA-N lithium;propan-2-olate Chemical compound [Li+].CC(C)[O-] HAUKUGBTJXWQMF-UHFFFAOYSA-N 0.000 description 1
- SZAVVKVUMPLRRS-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].C[CH-]C SZAVVKVUMPLRRS-UHFFFAOYSA-N 0.000 description 1
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 description 1
- 238000010550 living polymerization reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 125000004184 methoxymethyl group Chemical group [H]C([H])([H])OC([H])([H])* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
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- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
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- 150000002900 organolithium compounds Chemical class 0.000 description 1
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- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
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- 229920000098 polyolefin Polymers 0.000 description 1
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- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
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- 125000004079 stearyl 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])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
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- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 1
- MCULRUJILOGHCJ-UHFFFAOYSA-N triisobutylaluminium Chemical compound CC(C)C[Al](CC(C)C)CC(C)C MCULRUJILOGHCJ-UHFFFAOYSA-N 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 1
- LFXVBWRMVZPLFK-UHFFFAOYSA-N trioctylalumane Chemical compound CCCCCCCC[Al](CCCCCCCC)CCCCCCCC LFXVBWRMVZPLFK-UHFFFAOYSA-N 0.000 description 1
- VVSCTIPMEGDNSO-UHFFFAOYSA-N tritriacontyl prop-2-enoate Chemical group C(C=C)(=O)OCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC VVSCTIPMEGDNSO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L33/04—Homopolymers or copolymers of esters
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- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
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Abstract
Description
[1] 重量平均分子量が10万以上、重量平均分子量/数平均分子量が1.01〜1.8であって、かつガラス転移温度が40℃以下であり、メタクリル酸メチル単位と炭素数10〜36のアルキル基を有する(メタ)アクリル酸アルキルエステル単位を含有するメタクリル系共重合体(A)と、
沸点が200℃以上の溶媒(B)とを含む重合体溶液の製造方法であって、
(I)沸点が200℃未満の溶媒(C)中で単量体を重合してメタクリル系共重合体(A)を作製する工程、および
(II)上記工程(I)を経て得られたメタクリル系共重合体(A)と溶媒(C)とを含む溶液と溶媒(B)とを混合した後、溶媒(C)を除去し、重合体溶液中の溶媒(B)の含有量を10質量%以上とする工程、を含む
重合体溶液の製造方法。
[2] 溶媒(C)が芳香族炭化水素である[1]に記載の重合体溶液の製造方法。
[3] 溶媒(B)が鉱油である[1]または[2]に記載の重合体溶液の製造方法。
[4] メタクリル系共重合体(A)がメタクリル酸メチル単位5〜90質量%および炭素数10〜36の直鎖アルキル基を有する(メタ)アクリル酸アルキルエステル単位95〜10質量%を含有する[1]〜[3]のいずれかに記載の重合体溶液の製造方法。
[5] 得られる重合体溶液の200℃における粘度が40,000cps以下である[1]〜[4]のいずれかに記載の重合体溶液の製造方法。
[6] [1]〜[5]のいずれかに記載の製造方法により得られた重合体溶液を用いて潤滑油組成物を製造する方法。
(メタ)アクリル酸イソデシル、(メタ)アクリル酸2,4,6−トリメチルヘプチル、(メタ)アクリル酸2−ブチルオクチル、(メタ)アクリル酸2−エチル−n−ドデシル、(メタ)アクリル酸2−メチル−n−テトラデシル、(メタ)アクリル酸イソヘキサデシル、(メタ)アクリル酸2−n−オクチル−n−ノニル、(メタ)アクリル酸イソオクタデシル、(メタ) アクリル酸1−n−ヘキシル−n−トリデシル、(メタ)アクリル酸2−エチル−n−ヘプタデシル、(メタ)アクリル酸イソイコシル(別名:(メタ)アクリル酸2−n−オクチル−n−ドデシル)、(メタ)アクリル酸1−n−オクチル−n−ペンタデシル、(メタ)アクリル酸2−n−デシル−n−テトラデシル、(メタ)アクリル酸2−n−ドデシル−n−ペンタデシル、(メタ)アクリル酸イソトリアコンチル、(メタ)アクリル酸2−n−テトラデシル−n−ヘプタデシル、(メタ)アクリル酸2−n−ヘキサデシル−n−ヘプタデシル、(メタ)アクリル酸2−n−ヘキサデシル−n−イコシルおよび(メタ)アクリル酸2−n−テトラデシル−n−ドコシル等の分岐アルキル基を有する(メタ)アクリル酸アルキルエステル;などが挙げられる。
AlR1R2R3 (1)
(一般式(1)中、R1、R2およびR3はそれぞれ独立して置換基を有してもよいアルキル基、置換基を有していてもよいシクロアルキル基、置換基を有してもよいアリール基、置換基を有していてもよいアラルキル基、置換基を有してもよいアルコキシル基、置換基を有してもよいアリールオキシ基またはN,N−二置換アミノ基を表すか、またはR1が前記したいずれかの基を表し、R2およびR3は一緒になって置換基を有していてもよいアリーレンジオキシ基を表す。)
で表される有機アルミニウム化合物の存在下に、必要に応じて、反応系内に、ジメチルエーテル、ジメトキシエタン、ジエトキシエタン、12−クラウン−4などのエーテル;トリエチルアミン、N,N,N',N'−テトラメチルエチレンジアミン、N,N,N',N'',N''−ペンタメチルジエチレントリアミン、1,1,4,7,10,10−ヘキサメチルトリエチレンテトラミン、ピリジン、2,2'−ジピリジルなどの含窒素化合物をさらに存在させて(メタ)アクリル酸エステルを重合させることにより行なわれる。
前記溶媒(C)を除去する際に、メタクリル系共重合体(A)の濃度が概ね40質量%以下で有機溶媒量が多い領域での溶媒除去操作はワイプ式薄膜蒸発器が特に有効である。
(重量平均分子量Mw、重量平均分子量Mw/数平均分子量Mn、高分子量成分含有量および低分子量成分含有量)
ゲルパーミエーションクロマトグラフィー(GPC)にて下記の条件でクロマトグラムを測定し、標準ポリスチレンの分子量に換算した値を算出した。ベースラインはGPCチャートの高分子量側のピークの傾きが保持時間の早い方から見てゼロからプラスに変化する点と、低分子量側のピークの傾きが保持時間の早い方から見てマイナスからゼロに変化する点を結んだ線とした。
GPC装置:東ソー株式会社製、HLC−8320
検出器:示差屈折率検出器
カラム:東ソー株式会社製のTSKgel SuperMultipore HZM−Mの2本とSuperHZ4000を直列に繋いだものを用いた。
溶離剤: テトラヒドロフラン
溶離剤流量: 0.35ml/分
カラム温度: 40℃
検量線:標準ポリスチレン10点のデータを用いて作成
核磁気共鳴装置(Bruker社製 ULTRA SHIELD 400 PLUS)を用い、メタクリル系共重合体(A)10mgに対して重水素化クロロホルム1mL、室温、積算回数64回の条件にて、1H−NMRスペクトルを測定し、そのスペクトルのうち、TMSを0ppmとした際の3.3〜4.2ppmに現れるエステル基の酸素原子に隣接するメチレンまたはメチン、メチル基由来のシグナルの面積値からメタクリル系共重合体(A)中の単量体に由来する構造単位の組成を算出した。
JIS K7121に準拠して、示差走査熱量測定装置(島津製作所製、DSC−50(品番))を用いて、230℃まで一度昇温し、次いで室温まで冷却し、その後、室温から230℃までを10℃/分で昇温させる条件にてDSC曲線を測定した。2回目の昇温時に測定されるDSC曲線から求められる中間点ガラス転移温度を本発明におけるガラス転移温度とした。
島津製作所社製ガスクロマトグラフ GC−2014に、カラムとしてGL Sciences Inc.製 InertCap 1(df=0.4μm、0.25mmI.D.×60m)を繋ぎ、インジェクション温度を240℃に、検出器温度を300℃に、カラム温度を180℃から昇温速度10℃/分で280℃まで昇温して、10分間保持する条件にて測定を行った。脱揮後回収液に含まれるトルエン量は、対検量線法からメタクリル系共重合体(A)100質量部に対する質量部として算出した。
ブルックフィールド粘度計(東機産業社製BII型粘度計)を用い、所定の温度で測定した。
下記実施例および比較例では、沸点が200℃以上の溶媒(B)として、市販の鉱油(YUBASE4、SKオイルルブリカンツジャパン(株)製、沸点222℃)を用いた。
特開2007−84658号公報を参考にして、以下の通りにメタクリル系共重合体(A)を製造した。十分乾燥した2Lの三口フラスコに三方コックを取り付け、内部を窒素にて置換した後、室温にて、トルエン480g、1,2−ジメトキシエタン24g、イソブチルビス(2 ,6−ジ−t−ブチル−4−メチルフェノキシ)アルミニウムの0.45Mトルエン溶液10gを入れ、さらに、sec−ブチルリチウム1.0mmolを含有するシクロヘキサンとn−ヘキサンの混合溶液0.27gを加えた。続いてメタクリル酸アルキルエステル単量体であるメタクリル酸2−n−オクチル−n−ドデシル(以下単に、「メタクリル酸2−オクチルドデシル」と表記する)を30質量%、メタクリル酸ステアリルを30質量%、およびメタクリル酸メチル40質量%を含む混合物を原料として85g加え、室温にて12時間攪拌した。反応液は、当初黄色に着色していたが、12時間攪拌後には無色となった。得られた溶液に、室温で30%酢酸水25.7gを入れ、重合を停止させた。溶液を95℃で2時間加熱処理を行い、金属塩を析出させた。当該溶液を1晩静置した後、上澄みを回収し、メタクリル系共重合体の濃度が15質量%のトルエン溶液を得た。
sec−ブチルリチウム1.0mmolを含有するシクロヘキサンとn−ヘキサンの混合溶液 0.62gを、sec−ブチルリチウム0.64mmolを含有するシクロヘキサンとn−ヘキサンの混合溶液0.20gに変更した以外は実施例1と同様にして、メタクリル系共重合体を含むトルエン溶液を得た。得られたメタクリル系共重合体のガラス転移温度は25℃であった。その他評価結果は、表1で製造例2の溶液を用いる実施例5における<メタクリル系共重合体>の項に記載の通りである。
(製造例3)
メタクリル酸アルキルエステル単量体であるメタクリル酸ステアリル30質量%、メタクリル酸ラウリル40質量%、およびメタクリル酸メチル30質量%を含む混合物を原料とした以外は製造例2と同様に実施した。ガラス転移温度は20℃であった。得られたメタクリル系共重合体の評価結果は、表2で製造例3の溶液を用いる実施例22における<メタクリル系共重合体>の項に記載の通りである。
メタクリル酸アルキルエステル単量体であるメタクリル酸2−オクチルドデシル25質量%、メタクリル酸ステアリル25質量%、およびメタクリル酸メチル50質量%を含む混合物を原料とした以外は製造例1と同様に実施した。ガラス転移温度は45℃であった。得られたメタクリル系共重合体の評価結果は、表3で製造例4の溶液を用いる比較例3における<メタクリル系共重合体>の項に記載の通りである。
製造例1においてトルエン480gに代えて同量の鉱油(YUBASE4、SKオイルルブリカンツジャパン(株)製、沸点222℃)を用いる以外は同様にして反応させたが、メタクリル系共重合体は得られなかった。
製造例1のメタクリル系共重合体を含むトルエン溶液400質量部に、上記の鉱油240質量部を加え希釈した。希釈後のメタクリル系共重合体溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を表1に記載のロータリーエバポレーターにより、表1の条件でトルエンを脱揮した。脱揮後のメタクリル系共重合体溶液中に含まれる鉱油量は80質量%、トルエン量はメタクリル系共重合体100質量部に対して0.3質量部であり、200℃での粘度は20cpsであった。
製造例1のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を51質量%とした後、さらに鉱油を加え希釈し、表1に記載のトルエン脱揮前の成分比とした。希釈後のこの溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を表1に記載の薄膜蒸発器[ワイプレン2−03型((株)神鋼環境ソリューション社製)]により、表1の条件でトルエンを脱揮した。脱揮後のメタクリル系共重合体溶液に含まれる鉱油量は75質量%、トルエン量はメタクリル系共重合体100質量部に対して0.6質量部であり、200℃の粘度は20cpsであった。
製造例1のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を表1に記載の濃度とした後、さらに鉱油を加え希釈し、表1に記載のトルエン脱揮前の成分比とした。希釈後のこの溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を表1に記載の通り、薄膜蒸発器[ワイプレン2−03型((株)神鋼環境ソリューション社製)]または薄膜蒸発器[ワイプレン6−01型((株)神鋼環境ソリューション社製)により、表1の条件でトルエンを脱揮した。脱揮後のメタクリル系共重合体溶液に含まれる鉱油量およびトルエン量並びに200℃の粘度を表1に示す。
製造例1のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を表2に記載の濃度とした後、さらに鉱油を加え希釈し、表2に記載のトルエン脱揮前の成分比とした。希釈後のこの溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を用い、表2の条件に従って、トルエンを脱揮した。結果を表2に示す。
製造例2のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を表1に記載の濃度とした後、さらに鉱油を加え希釈し、表1に記載のトルエン脱揮前の成分比とした。希釈後のこの溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を用い、表1の条件に従って、トルエンを脱揮した。結果を表1に示す。
製造例2または3のメタクリル系共重合体トルエン溶液を用い、表2の条件に従って、トルエン脱揮前溶液の調製および脱揮を行った。結果を表2に示す。
製造例1のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を表3に記載の濃度とし、鉱油を加えずに、表1に記載のトルエン脱揮前の成分比とした。表3に記載の条件で脱揮を行おうとしたところ、脱揮中、装置内部のメタクリル系共重合体の詰まりによる工程通過不良が発生し、重合体溶液が回収できなかった。
製造例1のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を表3に記載の濃度とした後、さらに鉱油を加え希釈し、表3に記載のトルエン脱揮前の成分比とした。希釈後のこの溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を用い、表3の条件に従って、トルエンを脱揮した。結果を表3に示す。鉱油の添加量が少なく、脱揮中、装置内部のメタクリル系共重合体の詰まりによる工程通過不良が発生し、重合体溶液が回収できなかった。仮に重合体溶液を回収できた場合、トルエンが揮発し、メタクリル系共重合体約94質量%と鉱油約6質量%からなる成分の重合体溶液が得られる予定であった。
製造例4のメタクリル系共重合体トルエン溶液を濃縮して、メタクリル系共重合体の濃度を表3に記載の濃度とした後、さらに鉱油を加え希釈し、表3に記載のトルエン脱揮前の成分比とした。希釈後のこの溶液のブルックフィールド粘度計による測定では、100℃で100cps未満であった。希釈後のメタクリル系共重合体溶液を用い、表3の条件に従って、トルエンを実施例8と同様に脱揮した。メタクリル系共系重合体のガラス転移温度が高いため、脱揮中、装置内部でメタクリル系共重合体が析出し、メタクリル系共重合体の詰まりによる工程通過不良が発生し、重合体溶液が回収できなかった。
Claims (6)
- 重量平均分子量が10万以上、重量平均分子量/数平均分子量が1.01〜1.8であって、かつガラス転移温度が40℃以下であり、メタクリル酸メチル単位と炭素数10〜36のアルキル基を有する(メタ)アクリル酸アルキルエステル単位を含有するメタクリル系共重合体(A)と、沸点が200℃以上の溶媒(B)とを含む重合体溶液の製造方法であって、
(I)沸点が200℃未満の溶媒(C)中で単量体を重合してメタクリル系共重合体(A)を作製する工程、および
(II)上記工程(I)を経て得られたメタクリル系共重合体(A)と溶媒(C)とを含む溶液と溶媒(B)とを混合した後、溶媒(C)を除去し、重合体溶液中の溶媒(B)の含有量を10質量%以上とする工程、を含む
重合体溶液の製造方法。 - 溶媒(C)が芳香族炭化水素である請求項1に記載の重合体溶液の製造方法。
- 溶媒(B)が鉱油である請求項1または2に記載の重合体溶液の製造方法。
- メタクリル系共重合体(A)がメタクリル酸メチル単位5〜90質量%および炭素数10〜36の直鎖アルキル基を有する(メタ)アクリル酸アルキルエステル単位95〜10質量%を含有する請求項1〜3のいずれかに記載の重合体溶液の製造方法。
- 得られる重合体溶液の200℃における粘度が40,000cps以下である請求項1〜4のいずれかに記載の重合体溶液の製造方法。
- 請求項1〜5のいずれかに記載の製造方法により得られた重合体溶液を用いて潤滑油組成物を製造する方法。
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