JP5947745B2 - 建設機械用油圧作動油組成物 - Google Patents
建設機械用油圧作動油組成物 Download PDFInfo
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- JP5947745B2 JP5947745B2 JP2013100219A JP2013100219A JP5947745B2 JP 5947745 B2 JP5947745 B2 JP 5947745B2 JP 2013100219 A JP2013100219 A JP 2013100219A JP 2013100219 A JP2013100219 A JP 2013100219A JP 5947745 B2 JP5947745 B2 JP 5947745B2
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- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- DAZHWGHCARQALS-UHFFFAOYSA-N (2-methylphenyl) (4-methylphenyl) phenyl phosphate Chemical compound C1=CC(C)=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1 DAZHWGHCARQALS-UHFFFAOYSA-N 0.000 description 1
- KVPQFVHBQUTWLQ-CVBJKYQLSA-N (z)-docos-13-enamide;ethene Chemical compound C=C.CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O.CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O KVPQFVHBQUTWLQ-CVBJKYQLSA-N 0.000 description 1
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 description 1
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- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
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- BAXOFTOLAUCFNW-UHFFFAOYSA-N 1H-indazole Chemical compound C1=CC=C2C=NNC2=C1 BAXOFTOLAUCFNW-UHFFFAOYSA-N 0.000 description 1
- BVUXDWXKPROUDO-UHFFFAOYSA-N 2,6-di-tert-butyl-4-ethylphenol Chemical group CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BVUXDWXKPROUDO-UHFFFAOYSA-N 0.000 description 1
- DQSYGNJXYMAPMV-UHFFFAOYSA-N 2,6-ditert-butyl-4-(3,5-ditert-butyl-4-hydroxyphenyl)sulfanylphenol Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(SC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 DQSYGNJXYMAPMV-UHFFFAOYSA-N 0.000 description 1
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- YFHKLSPMRRWLKI-UHFFFAOYSA-N 2-tert-butyl-4-(3-tert-butyl-4-hydroxy-5-methylphenyl)sulfanyl-6-methylphenol Chemical compound CC(C)(C)C1=C(O)C(C)=CC(SC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 YFHKLSPMRRWLKI-UHFFFAOYSA-N 0.000 description 1
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- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 1
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- 239000005977 Ethylene Substances 0.000 description 1
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- 239000005639 Lauric acid Substances 0.000 description 1
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- 239000004264 Petrolatum Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- GTVWRXDRKAHEAD-UHFFFAOYSA-N Tris(2-ethylhexyl) phosphate Chemical compound CCCCC(CC)COP(=O)(OCC(CC)CCCC)OCC(CC)CCCC GTVWRXDRKAHEAD-UHFFFAOYSA-N 0.000 description 1
- QQVGEJLUEOSDBB-KTKRTIGZSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(CO)(CO)CO QQVGEJLUEOSDBB-KTKRTIGZSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- TUTWLYPCGCUWQI-UHFFFAOYSA-N decanamide Chemical compound CCCCCCCCCC(N)=O TUTWLYPCGCUWQI-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- KUMNEOGIHFCNQW-UHFFFAOYSA-N diphenyl phosphite Chemical compound C=1C=CC=CC=1OP([O-])OC1=CC=CC=C1 KUMNEOGIHFCNQW-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- NAGJZTKCGNOGPW-UHFFFAOYSA-N dithiophosphoric acid Chemical class OP(O)(S)=S NAGJZTKCGNOGPW-UHFFFAOYSA-N 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- SWSBIGKFUOXRNJ-CVBJKYQLSA-N ethene;(z)-octadec-9-enamide Chemical compound C=C.CCCCCCCC\C=C/CCCCCCCC(N)=O.CCCCCCCC\C=C/CCCCCCCC(N)=O SWSBIGKFUOXRNJ-CVBJKYQLSA-N 0.000 description 1
- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000002795 fluorescence method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 1
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 229940039717 lanolin Drugs 0.000 description 1
- 235000019388 lanolin Nutrition 0.000 description 1
- VMPHSYLJUKZBJJ-UHFFFAOYSA-N lauric acid triglyceride Natural products CCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCC)COC(=O)CCCCCCCCCCC VMPHSYLJUKZBJJ-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002763 monocarboxylic acids Chemical class 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- INAMEDPXUAWNKL-UHFFFAOYSA-N nonadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCCN INAMEDPXUAWNKL-UHFFFAOYSA-N 0.000 description 1
- 125000001196 nonadecyl 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])C([H])([H])[H] 0.000 description 1
- 125000002347 octyl 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])[H] 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- RQGCQWARLQDMCZ-UHFFFAOYSA-N pentadecanamide Chemical compound CCCCCCCCCCCCCCC(N)=O RQGCQWARLQDMCZ-UHFFFAOYSA-N 0.000 description 1
- 125000002958 pentadecyl 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])[H] 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- AWIZWICJDMFGHV-SEYXRHQNSA-N petroselinamide Chemical compound CCCCCCCCCCC\C=C/CCCCC(N)=O AWIZWICJDMFGHV-SEYXRHQNSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Chemical group CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920013636 polyphenyl ether polymer Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000001593 sorbitan monooleate Substances 0.000 description 1
- 235000011069 sorbitan monooleate Nutrition 0.000 description 1
- 229940035049 sorbitan monooleate Drugs 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010736 steam turbine oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical class O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- 150000005691 triesters Chemical class 0.000 description 1
- RXPQRKFMDQNODS-UHFFFAOYSA-N tripropyl phosphate Chemical compound CCCOP(=O)(OCCC)OCCC RXPQRKFMDQNODS-UHFFFAOYSA-N 0.000 description 1
- KOWVWXQNQNCRRS-UHFFFAOYSA-N tris(2,4-dimethylphenyl) phosphate Chemical compound CC1=CC(C)=CC=C1OP(=O)(OC=1C(=CC(C)=CC=1)C)OC1=CC=C(C)C=C1C KOWVWXQNQNCRRS-UHFFFAOYSA-N 0.000 description 1
- YRIDFQASBDRMBJ-UHFFFAOYSA-N undec-10-enamide Chemical compound NC(=O)CCCCCCCCC=C YRIDFQASBDRMBJ-UHFFFAOYSA-N 0.000 description 1
- FKVMWDZRDMCIAJ-UHFFFAOYSA-N undecanamide Chemical compound CCCCCCCCCCC(N)=O FKVMWDZRDMCIAJ-UHFFFAOYSA-N 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lubricants (AREA)
Description
(b)ジアルキルジチオリン酸亜鉛を0.01〜0.8質量%、
(c)塩基性カルシウムサリシレートを0.03〜1質量%、
(d)N原子又はO原子を含有しP原子を含有しない無灰系摩擦調整剤を50〜5000質量ppm、
を含有し、
亜鉛の原子換算の含有量が100〜500質量ppmであること、
を特徴とする建設機械用油圧作動油組成物を提供するものである。
(b)ジアルキルジチオリン酸亜鉛を0.01〜0.8質量%、
(c)塩基性カルシウムサリシレートを0.03〜1質量%、
(d)N原子又はO原子を含有しP原子を含有しない無灰系摩擦調整剤を50〜5000質量ppm、
を含有し、
亜鉛の原子換算の含有量が100〜500質量ppmであること、
を特徴とする建設機械用油圧作動油組成物である。
鉱油系基油成分としては、溶剤精製鉱油、水素化精製鉱油、水素化分解鉱油などが挙げられる。そのうち、基油成分としては、水素化精製鉱油、水素化分解鉱油が好ましい。水素化精製鉱油、水素化分解鉱油の製造方法は、特に限定されないが、好ましい製造方法としては、以下の方法が挙げられる。水素化精製鉱油の好ましい製造方法としては、常圧蒸留により得られた残さ油を減圧蒸留したのち、潤滑油留分として得られた留分を溶剤抽出し、水素化精製と溶剤脱ろうする方法が挙げられ、その後、更に2回目の水素化精製を行う方法が挙げられる。水素化分解鉱油の好ましい製造方法としては、まず、原油の常圧蒸留で得られた残さ油を減圧蒸留装置で処理し、そこで得られた減圧軽油を水素化処理及び水素化分解を行い、その後、軽質分、燃料分を減圧ストリッパーで除去した残渣物を得、この残渣物を減圧蒸留し、得られた潤滑油留分を水素化脱ロウ処理又はワックス異性化処理し、安定化処理を行う方法が挙げられ、その際、ワックス異性化により高粘度指数化させる方法がより好ましい方法として挙げられる。さらに、上記水素化分解処理工程と水素化異性化処理工程を含む方法では、原料として溶剤脱ロウによるスラックワックスを用いる方法も挙げられる。
合成系基油成分としては、フィッシャー・トロプシュ合成で得られたワックス等の原料を水素化分解処理及び水素化異性化処理して得た基油、ポリαオレフィン等の炭化水素系合基油、アルキルベンゼン、アルキルナフタレン等の芳香族系合成油、エステル油、アルキル化フェニルエーテル油、ポリアルキレングリコール類等の合成系基油が挙げられる。ポリαオレフィンの好適な製造方法としては、エチレンの低重合又はワックスの熱分解によって炭素数6〜18のα−オレフィンを合成し、このα−オレフィン2〜9単位を重合し、水添反応を行う方法が挙げられる。
なお、(a)基油に用いる基油成分として、溶剤脱ロウによるスラックワックスやフィッシャー・トロプシュ合成で得られたワックス等の原料から得られる水素化異性化基油や、芳香族系炭化水素油を用いる場合には、%CP及び%CNを適切な範囲に調整するために溶剤精製鉱油、水素化精製鉱油、水素化分解鉱油などを混合して用いることがより好ましい。
(a)基油
・基油成分A、B:共に水素化分解鉱油で、表1に表す性状を有する、APIグループIII基油。
・基油成分C:水素化精製鉱油で、表1に表す性状を有する、APIグループI基油。
・基油成分D、E:共に水素化精製鉱油で、表1に表す性状を有する、APIグループII相当基油。
(b)〜(f)添加剤
(b)ジアルキルジチオリン酸亜鉛:炭素数8のプライマリ−タイプ
(c−1)塩基性カルシウムサリシレート:過塩素酸法による塩基価230mgKOH/g、Ca含有量が8質量%のもの
(c−2)塩基性カルシウムスルホネート:過塩素酸法による塩基価310mgKOH/gのもの
(c−3)塩基性カルシウムフェネート:過塩素酸法による塩基価255mgKOH/gのもの
(d−1)無灰系摩擦調整剤:グリセリンモノオレエート
(d−2)無灰系摩擦調整剤:オレイン酸
(d−3)無灰系摩擦調整剤:オレイン酸アミド
(d−4)無灰系摩擦調整剤:酸性リン酸エステルアミン塩
(e)ポリ(メタ)アクリレート:重量平均分子量が4.6万、数平均分子量が3.2万、非分散タイプで有効成分量65%のもの。
(f−1)アミン系酸化防止剤:ジアルキル化ジフェニルアミン、アルキル基がオクチル基であるもの
(f−2)その他添加剤:フェノール系酸化防止剤、流動点降下剤、消泡剤等
・密度:JIS K 2249「密度試験方法」
・動粘度:JIS K 2283「動粘度試験方法」
・粘度指数:JIS K 2283「粘度指数算出方法」
・残留炭素:JIS K 2270「残留炭素分試験方法」
・酸価:JIS K 2501「中和価試験方法」
・ASTM色:JIS K 2580「ASTM色試験方法」
・硫黄分(紫外蛍光法):JIS K 2541−7「硫黄分試験方法(波長分散蛍光X線法)」
・窒素分:JIS K 2609「窒素分試験方法」
・n-d-m:ASTM 3238−85「Standard Test Method for Calculation of Carbon Distribution and Structural Group Analysis of Petroleum Oils By the n−d−m Method」
・アニリン点:JIS K 2256「アニリン点及び混合アニリン点試験方法」
・ヨウ素価:JIS K 00.70「化学製品の酸価、けん化価、エステル価、よう素価、水酸基価及び不けん化物の試験方法」
・Zn量:JPI−5S−38「潤滑油‐添加元素試験方法‐誘導結合プラズマ発光分光分析法」
・RPVOT :ASTM D 2272 「Standard Test Method for Oxidation Stability of Steam Turbine oils by Rotating Pressure Vessel」
・熱安定性試験:内径2.5cmのガラス製容器に試料を40ml入れ、鋼及び銅の触媒を浸漬し、回転盤付き恒温槽内に放置し、140℃×240h、または160℃×168hの条件におけるスラッジ量(0.8μmミリポアフィルター使用)を測定した。
(触媒材質/サイズ)
鋼=SPCC−SB、銅=C1100P、サイズはともに1.0mm×20mm×50mm
・SONICせん断安定性試験:JPI−5S−29「潤滑油せん断安定度試験方法」
・ビッカースV−104cポンプ試験:ASTM D 7043−10 「Standard Test Method for Indicating Wear Characteristics of Non-Petroleum and Petroleum Hydraulic Fluids in a Constant Volume Vane Pump」に準拠し、運転時間100h、250hにおけるカムリング、ベーンの合計摩耗量を評価した。
粘度指数向上剤の配合量(質量%)の数値は、希釈油を含めた配合量であり、括弧内の数値は、希釈油を除くポリマーの含有量である。
なお、試験条件はJASO M348に準拠して試験を行い、μ0/μd及びμsはサイクル数2000サイクルでの値を評価した。
Claims (3)
- (a)基油、
(b)ジアルキルジチオリン酸亜鉛を0.01〜0.8質量%、
(c)塩基性カルシウムサリシレートを0.03〜1質量%、
(d)N原子又はO原子を含有しP原子を含有しない無灰系摩擦調整剤を50〜5000質量ppm、
を含有し、
亜鉛の原子換算の含有量が100〜500質量ppmであること、
を特徴とする建設機械用油圧作動油組成物。 - 前記(a)が、%CAが5%以下の基油であり、前記(b)が、アルキル基の炭素数が3〜18のプライマリージアルキルジチオリン酸亜鉛であり、且つ、前記(d)が、水酸基を有する無灰系摩擦調整剤であることを特徴とする請求項1記載の建設機械用油圧作動油組成物。
- 更に、(e)重量平均分子量が2万〜15万のポリ(メタ)アクリレートを0.1〜7質量%含有することを特徴とする請求項1又は2いずれか1項記載の建設機械用油圧作動油組成物。
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