JP6045956B2 - Coolant composition - Google Patents
Coolant composition Download PDFInfo
- Publication number
- JP6045956B2 JP6045956B2 JP2013069017A JP2013069017A JP6045956B2 JP 6045956 B2 JP6045956 B2 JP 6045956B2 JP 2013069017 A JP2013069017 A JP 2013069017A JP 2013069017 A JP2013069017 A JP 2013069017A JP 6045956 B2 JP6045956 B2 JP 6045956B2
- Authority
- JP
- Japan
- Prior art keywords
- acid
- kinematic viscosity
- coolant composition
- temperature
- coolant
- 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.)
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- 239000000203 mixture Substances 0.000 title claims description 62
- 239000002826 coolant Substances 0.000 title claims description 56
- 150000005215 alkyl ethers Chemical class 0.000 claims description 39
- 239000002253 acid Substances 0.000 claims description 35
- 125000001931 aliphatic group Chemical group 0.000 claims description 26
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 16
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 16
- 125000003118 aryl group Chemical group 0.000 claims description 14
- 239000003960 organic solvent Substances 0.000 claims description 14
- 150000003839 salts Chemical class 0.000 claims description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 150000003852 triazoles Chemical class 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- 150000007522 mineralic acids Chemical class 0.000 claims description 4
- 150000007524 organic acids Chemical class 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical compound O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 235000005985 organic acids Nutrition 0.000 claims description 2
- 239000000110 cooling liquid Substances 0.000 description 25
- -1 glycol ethers Chemical class 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 16
- 229910052783 alkali metal Inorganic materials 0.000 description 11
- 230000007423 decrease Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000013021 overheating Methods 0.000 description 7
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 239000002736 nonionic surfactant Substances 0.000 description 6
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 6
- 159000000000 sodium salts Chemical class 0.000 description 6
- 230000032258 transport Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000003945 anionic surfactant Substances 0.000 description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- ZDPHROOEEOARMN-UHFFFAOYSA-N undecanoic acid Chemical compound CCCCCCCCCCC(O)=O ZDPHROOEEOARMN-UHFFFAOYSA-N 0.000 description 4
- WWZKQHOCKIZLMA-UHFFFAOYSA-N Caprylic acid Natural products CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 235000010233 benzoic acid Nutrition 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 2
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 125000002511 behenyl 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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- XSIFPSYPOVKYCO-UHFFFAOYSA-N butyl benzoate Chemical compound CCCCOC(=O)C1=CC=CC=C1 XSIFPSYPOVKYCO-UHFFFAOYSA-N 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 229940105329 carboxymethylcellulose Drugs 0.000 description 2
- 235000013985 cinnamic acid Nutrition 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 230000000694 effects Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 125000002463 lignoceryl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000001421 myristyl 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])[H] 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 2
- 125000001117 oleyl 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])=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])[H] 0.000 description 2
- LPNBBFKOUUSUDB-UHFFFAOYSA-N p-toluic acid Chemical compound CC1=CC=C(C(O)=O)C=C1 LPNBBFKOUUSUDB-UHFFFAOYSA-N 0.000 description 2
- 125000000913 palmityl 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])[H] 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 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 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 150000003557 thiazoles Chemical class 0.000 description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
- RHBGITBPARBDPH-UHFFFAOYSA-N (2E,4E)-5-(3,4-methylenedioxyphenyl)-2,4-pentadienoic acid Natural products OC(=O)C=CC=CC1=CC=C2OCOC2=C1 RHBGITBPARBDPH-UHFFFAOYSA-N 0.000 description 1
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 1
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- RHBGITBPARBDPH-ZPUQHVIOSA-N (E,E)-piperic acid Chemical compound OC(=O)\C=C\C=C\C1=CC=C2OCOC2=C1 RHBGITBPARBDPH-ZPUQHVIOSA-N 0.000 description 1
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- GYSCBCSGKXNZRH-UHFFFAOYSA-N 1-benzothiophene-2-carboxamide Chemical compound C1=CC=C2SC(C(=O)N)=CC2=C1 GYSCBCSGKXNZRH-UHFFFAOYSA-N 0.000 description 1
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 1
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 1
- COBPKKZHLDDMTB-UHFFFAOYSA-N 2-[2-(2-butoxyethoxy)ethoxy]ethanol Chemical compound CCCCOCCOCCOCCO COBPKKZHLDDMTB-UHFFFAOYSA-N 0.000 description 1
- WFSMVVDJSNMRAR-UHFFFAOYSA-N 2-[2-(2-ethoxyethoxy)ethoxy]ethanol Chemical compound CCOCCOCCOCCO WFSMVVDJSNMRAR-UHFFFAOYSA-N 0.000 description 1
- MXVMODFDROLTFD-UHFFFAOYSA-N 2-[2-[2-(2-butoxyethoxy)ethoxy]ethoxy]ethanol Chemical compound CCCCOCCOCCOCCOCCO MXVMODFDROLTFD-UHFFFAOYSA-N 0.000 description 1
- GTAKOUPXIUWZIA-UHFFFAOYSA-N 2-[2-[2-(2-ethoxyethoxy)ethoxy]ethoxy]ethanol Chemical compound CCOCCOCCOCCOCCO GTAKOUPXIUWZIA-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- SLAMLWHELXOEJZ-UHFFFAOYSA-N 2-nitrobenzoic acid Chemical compound OC(=O)C1=CC=CC=C1[N+]([O-])=O SLAMLWHELXOEJZ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- ZQVKTHRQIXSMGY-UHFFFAOYSA-N 4-Ethylbenzoic acid Chemical compound CCC1=CC=C(C(O)=O)C=C1 ZQVKTHRQIXSMGY-UHFFFAOYSA-N 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 description 1
- UTMDJGPRCLQPBT-UHFFFAOYSA-N 4-nitro-1h-1,2,3-benzotriazole Chemical compound [O-][N+](=O)C1=CC=CC2=NNN=C12 UTMDJGPRCLQPBT-UHFFFAOYSA-N 0.000 description 1
- LUEYUHCBBXWTQT-UHFFFAOYSA-N 4-phenyl-2h-triazole Chemical compound C1=NNN=C1C1=CC=CC=C1 LUEYUHCBBXWTQT-UHFFFAOYSA-N 0.000 description 1
- ATZHGRNFEFVDDJ-UHFFFAOYSA-N 4-propylbenzoic acid Chemical compound CCCC1=CC=C(C(O)=O)C=C1 ATZHGRNFEFVDDJ-UHFFFAOYSA-N 0.000 description 1
- AWQSAIIDOMEEOD-UHFFFAOYSA-N 5,5-Dimethyl-4-(3-oxobutyl)dihydro-2(3H)-furanone Chemical compound CC(=O)CCC1CC(=O)OC1(C)C AWQSAIIDOMEEOD-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
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- GHVNFZFCNZKVNT-UHFFFAOYSA-N Decanoic acid Natural products CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 150000001559 benzoic acids Chemical class 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- GONOPSZTUGRENK-UHFFFAOYSA-N benzyl(trichloro)silane Chemical compound Cl[Si](Cl)(Cl)CC1=CC=CC=C1 GONOPSZTUGRENK-UHFFFAOYSA-N 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 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
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
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Description
本発明は、自動車等の内燃機関を冷却するための冷却液組成物に関するものである。 The present invention relates to a coolant composition for cooling an internal combustion engine such as an automobile.
自動車等の内燃機関のラジエータや、電池を使用する装置における電池等の発熱装置を冷却するために、これらから発生する熱を速やかに外部に放出させることを目的としてクーラント等の各種冷却液組成物を使用した放熱装置が使用されている。
これらの放熱装置にてこれまで使用されている冷却液組成物は、他の液体と同様に低温よりもより高温において粘度は低くなるという物性を備えている。
このため、発熱装置から冷却液組成物が受熱して、該冷却液組成物の温度が上昇するにつれて、より低粘度となり冷却液組成物が循環する回路をよりスムーズに流れることになる。この結果、これらの発熱装置をある程度は冷却することができた。
Various cooling liquid compositions such as coolant for the purpose of quickly releasing heat generated from radiators of internal combustion engines such as automobiles and heat generating devices such as batteries in devices using batteries. A heat dissipation device using is used.
The cooling liquid composition used so far in these heat radiating devices has a physical property that the viscosity becomes lower at a higher temperature than at a low temperature, like other liquids.
For this reason, as the cooling liquid composition receives heat from the heat generating device and the temperature of the cooling liquid composition rises, the viscosity becomes lower and the cooling liquid composition circulates more smoothly. As a result, these heat generating devices could be cooled to some extent.
加えて、特許文献１に記載されているように、表面処理された微小粒子を冷却液組成物に配合することにより、冷却液組成物自体の熱伝導率を向上させて、熱輸送能力を向上させることが知られている。
確かに、この方法によれば、熱輸送能力が向上するものの、分散された微小粒子の沈殿防止等の冷却液組成物自体の系の安定化を考慮する必要があるし、冷却液組成物の温度に冷却液組成物自体の熱輸送能力が依存しないので、特に温度に応じた熱輸送を行うことが困難であった。
In addition, as described in Patent Document 1, by adding the surface-treated fine particles to the cooling liquid composition, the thermal conductivity of the cooling liquid composition itself is improved and the heat transport capability is improved. It is known to let
Certainly, according to this method, although the heat transport capability is improved, it is necessary to consider stabilization of the system of the cooling liquid composition itself, such as prevention of precipitation of dispersed fine particles, and the cooling liquid composition Since the heat transport capability of the coolant composition itself does not depend on the temperature, it is particularly difficult to perform heat transport according to the temperature.
他方、装置の通常運転中には、オーバーヒート防止を目的に冷却液組成物を円滑に循環させて装置を冷却させることが必要であるが、そのためには冷却液組成物が加熱されることにより十分に低粘度化されることが必要である。
しかしながら、従来は、装置の運転開始直後の温度条件において冷却液組成物は高粘度化であるため、装置をある程度の温度まで速やかに上昇させると、定常運転時に装置が過熱されてオーバーヒートを発生する可能性が高くなり、逆に定常運転時に十分に放熱をさせようとすると、運転開始直後の冷却液組成物が低粘度化するので、運転開始後速やかに装置を定常状態として安定運転させることが困難であった。
このように、運転開始直後の冷却液組成物による放熱を抑制し、かつ通常運転時において冷却液組成物を十分に低粘度化させて、十分に放熱させることのバランスをとることが困難であった。
On the other hand, during the normal operation of the apparatus, it is necessary to cool the apparatus by smoothly circulating the cooling liquid composition for the purpose of preventing overheating. For this purpose, it is sufficient that the cooling liquid composition is heated. It is necessary to reduce the viscosity.
However, conventionally, since the coolant composition has a high viscosity under the temperature conditions immediately after the start of operation of the apparatus, when the apparatus is quickly raised to a certain temperature, the apparatus is overheated during steady operation and generates overheating. On the other hand, if the possibility is high, and if sufficient heat dissipation is attempted during steady operation, the viscosity of the coolant composition immediately after the start of operation becomes low, so that the device can be stably operated as a steady state immediately after the start of operation. It was difficult.
As described above, it is difficult to balance heat dissipation by suppressing the heat dissipation by the coolant composition immediately after the start of operation and sufficiently reducing the viscosity of the coolant composition during normal operation to sufficiently dissipate heat. It was.
従来のエンジン冷却液と比較して、本発明はエンジンの運転直後における冷却液の動粘度をより高くすることで、冷却損失を低減し速やかにエンジンを最適温度まで上昇させることができ、また、定常運転時の動粘度をより低くすることで、効率的にエンジンを冷却しオーバーヒートを防止することができる冷却液を提供することにより、エンジンの運転を円滑化させる。さらに、高温において分離しない冷却液を得る。 Compared to conventional engine coolant, the present invention can increase the kinematic viscosity of the coolant immediately after operation of the engine to reduce cooling loss and quickly raise the engine to the optimum temperature. By lowering the kinematic viscosity during steady operation, the engine can be operated smoothly by providing a coolant that can efficiently cool the engine and prevent overheating. In addition, a coolant that does not separate at high temperatures is obtained.
上記課題の解決のために本発明者は以下の方法を発明した。
１．下記一般式（１）で表されるアルキルエーテル、及び下記一般式（２）で表されるアルキルエーテルと、水及び／又は水溶性有機溶媒を含有する冷却液組成物。
Ｒ１−Ｏ−Ａｎ−Ｈ （１）
式中、Ｒ１は炭素数８〜３０の直鎖状又は分岐構造の飽和脂肪族炭化水素基、又は直鎖状又は分岐構造の不飽和脂肪族炭化水素基を示し、Ａはエチレンオキシド及び／又はプロピレンオキシドを示し、ｎはエチレンオキシド及び／又はプロピレンオキシドの平均付加モル数を示し、ｎは３〜１８である。
Ｒ２−Ｏ−Ｂｍ−Ｈ （２）
式中、Ｒ２は炭素数８〜３０の直鎖状又は分岐構造の飽和脂肪族炭化水素基、又は直鎖状又は分岐構造の不飽和脂肪族炭化水素基を示し、Ｂはエチレンオキシド及び／又はプロピレンオキシドを示し、ｍはエチレンオキシド及び／又はプロピレンオキシドの平均付加モル数を示し、ｍは３０以上である。
２．２５℃における動粘度が８．５mm２/s以上、かつ１００℃における動粘度が１．２mm２/s以下である１に記載の冷却液組成物。
３．防錆剤として、無機酸、有機酸、トリアゾールの中から選ばれる少なくとも1種以上を含有する１又は２に記載の冷却液組成物。
４．無機酸が、リン酸、硝酸、硼酸、珪酸、モリブデン酸又はその塩である３に記載の冷却液組成物。
５．有機酸が、脂肪族一塩基酸、脂肪族二塩基酸、芳香族一塩基酸、芳香族二塩基酸又はその塩である３に記載の冷却液組成物。
６．少なくとも1種以上の消泡剤を含有する１〜５のいずれかに記載の冷却液組成物。
In order to solve the above problems, the present inventors have invented the following method.
1. A coolant composition comprising an alkyl ether represented by the following general formula (1), an alkyl ether represented by the following general formula (2), and water and / or a water-soluble organic solvent.
R 1 —O—An—H (1)
In the formula, R 1 represents a linear or branched saturated aliphatic hydrocarbon group having 8 to 30 carbon atoms, or a linear or branched unsaturated aliphatic hydrocarbon group, and A represents ethylene oxide and / or Represents propylene oxide, n represents the average number of moles of ethylene oxide and / or propylene oxide, and n is 3 to 18.
R 2 —O—Bm—H (2)
In the formula, R 2 represents a linear or branched saturated aliphatic hydrocarbon group having 8 to 30 carbon atoms, or a linear or branched unsaturated aliphatic hydrocarbon group, and B represents ethylene oxide and / or Represents propylene oxide, m represents the average number of moles of ethylene oxide and / or propylene oxide, and m is 30 or more.
2. The coolant composition according to 1, wherein the kinematic viscosity at 25 ° C. is 8.5 mm 2 / s or more and the kinematic viscosity at 100 ° C. is 1.2 mm 2 / s or less.
3. 3. The coolant composition according to 1 or 2, comprising at least one selected from inorganic acids, organic acids, and triazoles as a rust inhibitor.
4). 4. The coolant composition according to 3, wherein the inorganic acid is phosphoric acid, nitric acid, boric acid, silicic acid, molybdic acid or a salt thereof.
5. 4. The coolant composition according to 3, wherein the organic acid is an aliphatic monobasic acid, an aliphatic dibasic acid, an aromatic monobasic acid, an aromatic dibasic acid or a salt thereof.
6). The cooling liquid composition in any one of 1-5 containing an at least 1 sort (s) or more antifoamer.
本発明によれば、装置の運転開始直後においては冷却液組成物による放熱を抑制し、定常運転時においては、冷却液組成物を十分に循環させることにより放熱を確実に行うという効果を奏する。この結果、装置の運転開始後、定常運転に至る時間を短縮し、かつ定常運転時には安定的に装置から放熱させることによって、いわゆるオーバーヒートの発生を防止するものである。 According to the present invention, the heat release by the coolant composition is suppressed immediately after the start of the operation of the apparatus, and the heat release is reliably performed by sufficiently circulating the coolant composition during the steady operation. As a result, after the operation of the apparatus is started, the time to reach the steady operation is shortened, and heat is stably radiated from the apparatus during the steady operation, thereby preventing the occurrence of so-called overheating.
従来の冷却液組成物は、温度上昇につれて動粘度を低下させる性質を有しており、そのような性質を利用して熱を輸送するために使用されてきた。
本発明は、特定のアルキルエーテルを含有させた冷却液組成物とすることにより温度変化に対してこれまでにない動粘度の挙動を示すという性質を備え、それにより、冷却液組成物を使用する装置のより安定的な運転を実現する発明である。
本発明における動粘度はＪＩＳ Ｋ ２２８３に基づき、ウベローデ粘度計を用いて０℃〜１００℃まで各温度毎に求めた。
Conventional coolant compositions have the property of reducing kinematic viscosity with increasing temperature and have been used to transport heat utilizing such properties.
The present invention has the property of exhibiting an unprecedented kinematic viscosity behavior with respect to a temperature change by using a cooling liquid composition containing a specific alkyl ether, thereby using the cooling liquid composition. It is an invention that realizes more stable operation of the apparatus.
The kinematic viscosity in this invention was calculated | required for every temperature from 0 to 100 degreeC using the Ubbelohde viscometer based on JISK2283.
その動粘度の挙動とは、動粘度の温度依存性をJIS K2283附属書１に示される動粘度−温度チャートに基づき作図すると、ある中間温度域（つまり、最も急激に動粘度が低下する温度領域）よりも低温域及び高温域においては、おおよそ、温度の対数の値に反比例して動粘度の対数の対数の値が減少する傾向を有するが、低温域と高温域の中間である４０〜７０℃付近の中間温度域においてはその比例定数がより小さくなる。つまり反比例の傾きが大きくなるという挙動である。
この結果、本発明の冷却液組成物は低温域及び高温域の間の中間温度域において、低温域および高温域の挙動から予測される動粘度よりも明らかに低い動粘度を示す。
The kinematic viscosity behavior is defined as the temperature dependence of kinematic viscosity based on the kinematic viscosity-temperature chart shown in Annex 1 of JIS K2283. In the low temperature range and the high temperature range, the logarithmic value of the logarithm of kinematic viscosity tends to decrease in inverse proportion to the logarithm value of the temperature. In the intermediate temperature range near ℃, the proportionality constant becomes smaller. In other words, the behavior is that the inversely proportional slope increases.
As a result, the coolant composition of the present invention exhibits a kinematic viscosity that is clearly lower than the kinematic viscosity predicted from the behavior of the low temperature region and the high temperature region in the intermediate temperature region between the low temperature region and the high temperature region.
このため、例えば４０℃以下の低温下においては、冷却液組成物の動粘度は十分に高いので流動性が小さいものである。このため、２５℃における冷却液組成物の動粘度を８．５mm2/s以上、好ましくは１０mm2/s以上、より好ましくは１２mm2/s以上、更に好ましくは１５mm2/s以上とすることができる。このような状態において装置の運転を開始すると、発生した熱が装置自身の温度上昇と冷却液組成物の温度上昇に費やされる。特に装置が一定温度にまで速やかに温度上昇することにより、装置の安定的な運転状態、より高効率の運転状態に速やかに到達するという効果を発揮できる。 For this reason, for example, at a low temperature of 40 ° C. or lower, the kinematic viscosity of the coolant composition is sufficiently high, so that the fluidity is small. For this reason, the kinematic viscosity of the coolant composition at 25 ° C. should be 8.5 mm 2 / s or more, preferably 10 mm 2 / s or more, more preferably 12 mm 2 / s or more, and even more preferably 15 mm 2 / s or more. Can do. When the operation of the apparatus is started in such a state, the generated heat is consumed for increasing the temperature of the apparatus itself and increasing the temperature of the coolant composition. In particular, when the temperature of the device rises rapidly to a certain temperature, the effect of promptly reaching a stable operation state of the device and a more efficient operation state can be exhibited.
その後、運転を継続させることにより、装置自体は高温となり、さらに高温下において冷却液組成物はさらに流動性が向上するので、より多くの熱量を輸送することができ、例えば内燃機関であれば、運転により発生した熱量が、冷却液組成物によってさらに多く輸送されるので、内燃機関の冷却効率が向上し、そのための装置の小型化や、より過酷な運転状況への対応が可能になり、オーバーヒートの発生を防止することができる。
そのような効果を得るためには、冷却液組成物の１００℃における動粘度を１．２mm2/s以下、好ましくは１．０mm2/s以下、さら好ましくは０．９mm2/s以下とすることもできる。
また、温度が上昇するにつれて最も急激に動粘度が低下する温度領域が２５℃〜５０℃の範囲にある場合、その中間温度領域における動粘度の変化を示す指標として、（５０℃における動粘度（mm2/s）／２５℃における動粘度（mm2/s））の値が０．３４以下であることが好ましく、更に好ましくは０．３０以下、より好ましくは０．２５以下であり、この値が小さい程好ましい。
After that, by continuing the operation, the apparatus itself becomes a high temperature, and the coolant composition further improves the fluidity at a higher temperature, so that a larger amount of heat can be transported. The amount of heat generated during operation is further transported by the coolant composition, improving the cooling efficiency of the internal combustion engine, making it possible to reduce the size of the device and respond to more severe operating conditions, and overheating Can be prevented.
In order to obtain such an effect, the kinematic viscosity at 100 ° C. of the coolant composition is 1.2 mm 2 / s or less, preferably 1.0 mm 2 / s or less, more preferably 0.9 mm 2 / s or less. You can also
Further, when the temperature range where the kinematic viscosity decreases most rapidly as the temperature rises is in the range of 25 ° C. to 50 ° C., as an index indicating the change in kinematic viscosity in the intermediate temperature range, mm 2 / s) / kinematic viscosity at 25 ° C. (mm 2 / s)) is preferably 0.34 or less, more preferably 0.30 or less, more preferably 0.25 or less. A smaller value is preferable.
本発明の冷却液組成物は、廃熱源から廃熱を熱交換器へ輸送する用途、及び加熱源から熱を輸送して加熱対象物を加熱する用途に利用することができる。冷却液組成物は、具体的には、例えば自動車用内燃機関及びモーターの冷却液として用いることができる。 The coolant composition of the present invention can be used in applications for transporting waste heat from a waste heat source to a heat exchanger, and applications for transporting heat from a heating source to heat an object to be heated. Specifically, the coolant composition can be used, for example, as a coolant for automobile internal combustion engines and motors.
以下、具体的に本発明について述べる。
本発明の冷却液組成物は、水溶性有機溶媒又は水溶性有機溶媒と水からなる基材に、一般式（１）で表されるアルキルエーテルと一般式（２）で表されるアルキルエーテルを添加してなるものであり、熱の発生源である内燃機関用、加熱装置用等、積極的に熱を輸送させる装置内を循環させる用途に使用するものである。
The present invention will be specifically described below.
In the coolant composition of the present invention, an alkyl ether represented by the general formula (1) and an alkyl ether represented by the general formula (2) are applied to a base material comprising a water-soluble organic solvent or a water-soluble organic solvent and water. It is added and used for the purpose of circulating through the device that actively transports heat, such as for internal combustion engines and heating devices that are sources of heat.
（水溶性有機溶媒）
本発明にて使用できる水溶性有機溶媒としては、従来から冷却液組成物に使用されてきた水溶性有機溶媒を採用することができる。
このような水溶性有機溶媒としては、メチルアルコール、エチルアルコール、プロパノール、ブタノール等のアルコール類、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、1,3-プロパンジオール、1,3-ブタンジオール、1,5-ペンタンジオール、ヘキシレングリコール等のグリコール類、グリセリン、エチレングリコールモノメチルエーテル、ジエチレングリコールモノメチルエーテル、トリエチレングリコールモノメチルエーテル、テトラ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モノエチルエーテル、ジエチレングリコールモノエチルエーテル、トリエチレングリコールモノエチルエーテル、テトラエチレングリコールモノエチルエーテル、エチレングリコールモノブチルエーテル、ジエチレングリコールモノブチルエーテル、トリエチレングリコールモノブチルエーテル、及びテトラエチレングリコールモノブチルエーテル等のグリコールエーテル類が例示され、これらより選択される1 種以上を単独又は組み合わせて用いることができる。
これらの内のどの水溶性有機溶媒を選択して使用するかは、使用時の水溶性有機溶媒の濃度、各温度における冷却液組成物の動粘度、一般式（１）や（２）のアルキルエーテルの濃度等を考慮して決定することができる。
(Water-soluble organic solvent)
As the water-soluble organic solvent that can be used in the present invention, water-soluble organic solvents that have been conventionally used in coolant compositions can be employed.
Examples of such water-soluble organic solvents include alcohols such as methyl alcohol, ethyl alcohol, propanol, and butanol, ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,3-butanediol, 1,5 -Glycols such as pentanediol and hexylene glycol, glycerin, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, tetraethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, triethylene glycol mono Ethyl ether, tetraethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol Glycol monomethyl ether, triethylene glycol monobutyl ether, and glycol ethers such as tetraethylene glycol monobutyl ether can be exemplified, it is possible to use one or more selected from these alone or in combination.
Which of these water-soluble organic solvents is selected and used depends on the concentration of the water-soluble organic solvent at the time of use, the kinematic viscosity of the coolant composition at each temperature, and the alkyls of the general formulas (1) and (2) It can be determined in consideration of the ether concentration and the like.
本発明において、アルキルエーテルとして含有することが可能である化合物は、上記一般式（１）で表されるアルキルエーテルと上記一般式（２）で表されるアルキルエーテルである。
冷却液組成物中の水溶性有機溶媒の含有量は、水を含有しない場合には、一般式（１）や（２）のアルキルエーテルを除く全ての量を水溶性有機溶媒とすることができ、このときの水溶性有機溶媒の濃度は９０〜９９重量％である。
また本発明の冷却液組成物が水を含有する場合には、水溶性有機溶媒の含有量は１０〜９５重量％とすることができる。
In the present invention, the compounds that can be contained as the alkyl ether are the alkyl ether represented by the general formula (1) and the alkyl ether represented by the general formula (2).
The content of the water-soluble organic solvent in the cooling liquid composition can be any water-soluble organic solvent except for the alkyl ether of the general formula (1) or (2) when water is not included. The concentration of the water-soluble organic solvent at this time is 90 to 99% by weight.
When the coolant composition of the present invention contains water, the content of the water-soluble organic solvent can be 10 to 95% by weight.
（一般式（１）で表されるアルキルエーテル）
本発明にて用いることができる一般式（１）で表されるアルキルエーテルは、一般式（１）において、Ｒ１が炭素数８〜３０、好ましくは１２〜２４の飽和脂肪族炭化水素基又は不飽和脂肪族炭化水素基を示し、ラウリル、ミリスチル、パルミチル、ステアリル、オレイル、アラキル、ベヘニル、リグノセリル等が挙げられる。そしてＲ１は直鎖状であっても分岐構造であってもよい。
Ａはエチレンオキシド及び／又はプロピレンオキシドを示しており、エチレンオキシドのみが付加してなる基、又はプロピレンオキシドのみが付加してなる基でも良く、１分子中にエチレンオキシド及びプロピレンオキシドが共に付加してなる基でもよい。 nはエチレンオキシド及び／又はプロピレンオキシドの平均付加モル数を示し、その範囲は３〜１８、好ましくは４〜１０である。
(Alkyl ether represented by the general formula (1))
The alkyl ether represented by the general formula (1) that can be used in the present invention is, in the general formula (1), R 1 is a saturated aliphatic hydrocarbon group having 8 to 30 carbon atoms, preferably 12 to 24 carbon atoms, or An unsaturated aliphatic hydrocarbon group, which includes lauryl, myristyl, palmityl, stearyl, oleyl, aralkyl, behenyl, lignoceryl and the like. R 1 may be linear or branched.
A represents ethylene oxide and / or propylene oxide, and may be a group formed by adding only ethylene oxide or a group formed by adding only propylene oxide, or a group formed by adding both ethylene oxide and propylene oxide in one molecule. But you can. n represents the average number of added moles of ethylene oxide and / or propylene oxide, and the range thereof is 3 to 18, preferably 4 to 10.
（一般式（２）で表されるアルキルエーテル）
本発明にて用いることができる一般式（２）で表されるアルキルエーテルは、一般式（２）において、Ｒ２は炭素数８〜３０、好ましくは１２〜２４の飽和脂肪族炭化水素基又は不飽和脂肪族炭化水素基を示し、ラウリル、ミリスチル、パルミチル、ステアリル、オレイル、アラキル、ベヘニル、リグノセリル等が挙げられる。そしてＲ２は直鎖状であっても分岐構造であってもよい。
Ｂはエチレンオキシド及び／又はプロピレンオキシドを示しており、エチレンオキシドのみが付加してなる基、又はプロピレンオキシドのみが付加してなる基でも良く、１分子中にエチレンオキシド及びプロピレンオキシドが共に付加してなる基でもよい。ｍはエチレンオキシド及び／又はプロピレンオキシドの平均付加モル数を示し、ｍは３０以上、好ましくは４０以上である。
(Alkyl ether represented by the general formula (2))
The alkyl ether represented by the general formula (2) that can be used in the present invention is, in the general formula (2), R 2 is a saturated aliphatic hydrocarbon group having 8 to 30 carbon atoms, preferably 12 to 24 carbon atoms, or An unsaturated aliphatic hydrocarbon group, which includes lauryl, myristyl, palmityl, stearyl, oleyl, aralkyl, behenyl, lignoceryl and the like. R 2 may be linear or branched.
B represents ethylene oxide and / or propylene oxide, which may be a group formed by adding only ethylene oxide or a group formed by adding only propylene oxide, or a group formed by adding both ethylene oxide and propylene oxide in one molecule. But you can. m represents an average addition mole number of ethylene oxide and / or propylene oxide, and m is 30 or more, preferably 40 or more.
（その他成分）
本発明の冷却液組成物には、上述の成分の他、冷却液組成物を使用する装置を構成する金属部分の発錆を防止することを目的として、防錆剤を含有させることが好ましい。防錆剤として、リン酸、硼酸、ケイ酸、亜硝酸、硝酸、モリブデン酸、脂肪族一塩基酸、脂肪族二塩基酸、芳香族一塩基酸、芳香族二塩基酸及びそれらの塩、トリアゾール、及びチアゾールが挙げられる。
(Other ingredients)
In addition to the components described above, the coolant composition of the present invention preferably contains a rust preventive agent for the purpose of preventing rusting of a metal part constituting an apparatus using the coolant composition. As anticorrosive, phosphoric acid, boric acid, silicic acid, nitrous acid, nitric acid, molybdic acid, aliphatic monobasic acid, aliphatic dibasic acid, aromatic monobasic acid, aromatic dibasic acid and their salts, triazole , And thiazole.
リン酸塩としては、例えばリン酸、ピロリン酸及びポリリン酸のアルカリ金属塩が挙げられる。硼酸塩としては、例えばアルカリ金属塩が挙げられる。ケイ酸塩としては、例えばアルカリ金属塩が挙げられる。亜硝酸塩及び硝酸塩としては、例えばアルカリ金属塩が挙げられる。モリブデン酸塩としては、例えばアルカリ金属塩が挙げられる。 Examples of the phosphate include alkali metal salts of phosphoric acid, pyrophosphoric acid and polyphosphoric acid. Examples of borates include alkali metal salts. Examples of the silicate include alkali metal salts. Examples of nitrite and nitrate include alkali metal salts. Examples of molybdates include alkali metal salts.
脂肪族一塩基酸は、脂肪族一塩基酸塩であってもよい。脂肪族一塩基酸としては、例えばペンタン酸、ヘキサン酸、ヘプタン酸、オクタン酸、２−エチルヘキサン酸、ノナン酸、デカン酸、ウンデカン酸、ドデカン酸、オレイン酸、リノール酸、リノレン酸、リシノール酸及びステアリン酸が挙げられる。脂肪族一塩基酸塩としては、例えばナトリウム塩及びカリウム塩等のアルカリ金属塩が挙げられる。 The aliphatic monobasic acid may be an aliphatic monobasic acid salt. Examples of aliphatic monobasic acids include pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, 2-ethylhexanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, oleic acid, linoleic acid, linolenic acid, and ricinoleic acid. And stearic acid. Examples of the aliphatic monobasic acid salt include alkali metal salts such as sodium salt and potassium salt.
脂肪族二塩基酸は、脂肪族二塩基酸塩であってもよい。脂肪族二塩基酸としては、例えばシュウ酸、マロン酸、コハク酸、グルタル酸、アジピン酸、ピペリン酸、スベリン酸、アゼライン酸、セバシン酸、ウンデカン２酸、ドデカン２酸、ブラシル酸、及びタプチン酸が挙げられる。脂肪族二塩基酸塩としては、例えばナトリウム塩及びカリウム塩等のアルカリ金属塩が挙げられる。 The aliphatic dibasic acid may be an aliphatic dibasic acid salt. Examples of the aliphatic dibasic acid include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, piperic acid, suberic acid, azelaic acid, sebacic acid, undecanoic acid, dodecanedioic acid, brassic acid, and taptic acid. Is mentioned. Examples of the aliphatic dibasic acid salt include alkali metal salts such as sodium salt and potassium salt.
芳香族一塩基酸は、芳香族一塩基酸塩であってもよい。芳香族一塩基酸としては、例えば安息香酸、ニトロ安息香酸、ヒドロキシ安息香酸等の安息香酸類、ｐ−トルイル酸、ｐ−エチル安息香酸、ｐ−プロピル安息香酸、ｐ−イソプロピル安息香酸、ｐ−ｔｅｒｔブチル安息香酸などのアルキル安息香酸、一般式ＲＯ−Ｃ６Ｈ４−ＣＯＯＨ（Ｒは炭素数１〜５のアルキル基）で表されるアルコキシ安息香酸、及び、一般式Ｒ−Ｃ６Ｈ４−ＣＨ＝ＣＯＯＨ（Ｒは炭素数１〜５のアルキル基又はアルコキシ基）で表されるケイ皮酸類（ケイ皮酸、アルキルケイ皮酸及びアルコキシケイ皮酸）が挙げられる。芳香族一塩基酸塩としては、例えばナトリウム塩、カリウム塩及びリチウム塩等のアルカリ金属塩が挙げられる。 The aromatic monobasic acid may be an aromatic monobasic acid salt. Examples of the aromatic monobasic acid include benzoic acids such as benzoic acid, nitrobenzoic acid, and hydroxybenzoic acid, p-toluic acid, p-ethylbenzoic acid, p-propylbenzoic acid, p-isopropylbenzoic acid, and p-tert. alkyl benzoate, (R is an alkyl group having 1 to 5 carbon atoms) formula RO-C 6 H 4 -COOH alkoxy benzoic acid represented by such as butyl benzoate and the general formula R-C 6 H 4 - Cinnamic acids represented by CH = COOH (R is an alkyl group or alkoxy group having 1 to 5 carbon atoms) (cinnamic acid, alkylcinnamic acid and alkoxycinnamic acid) can be mentioned. Examples of the aromatic monobasic acid salt include alkali metal salts such as sodium salt, potassium salt and lithium salt.
芳香族二塩基酸は、芳香族二塩基酸塩であってもよい。芳香族二塩基酸としては、例えばフタル酸、イソフタル酸及びテレフタル酸が挙げられる。芳香族二塩基酸塩としては、例えばナトリウム塩、カリウム塩及びリチウム塩等のアルカリ金属塩が挙げられる。 The aromatic dibasic acid may be an aromatic dibasic acid salt. Examples of the aromatic dibasic acid include phthalic acid, isophthalic acid, and terephthalic acid. Examples of the aromatic dibasic acid salt include alkali metal salts such as sodium salt, potassium salt and lithium salt.
トリアゾールは、トリアゾール塩であってもよい。トリアゾールとしては、例えばベンゾトリアゾール、トリルトリアゾール、４−フェニル−１，２，３−トリアゾール、２−ナフトトリアゾール、及び４−ニトロベンゾトリアゾールが挙げられる。トリアゾール塩としては、ナトリウム塩、カリウム塩及びリチウム塩等のアルカリ金属塩が挙げられる。 The triazole may be a triazole salt. Examples of the triazole include benzotriazole, tolyltriazole, 4-phenyl-1,2,3-triazole, 2-naphthotriazole, and 4-nitrobenzotriazole. Examples of the triazole salt include alkali metal salts such as sodium salt, potassium salt and lithium salt.
チアゾールは、チアゾール塩であってもよい。チアゾールとしては、ベンゾチアゾール、及びメルカプトベンゾチアゾールが挙げられる。チアゾール塩としては、ナトリウム塩、カリウム塩及びリチウム塩等のアルカリ金属塩が挙げられる。 The thiazole may be a thiazole salt. Examples of thiazole include benzothiazole and mercaptobenzothiazole. Examples of the thiazole salt include alkali metal salts such as sodium salt, potassium salt and lithium salt.
防錆剤は、冷却液組成物中に単独で含有させてもよいし、複数種を組み合わせて含有させてもよい。防錆剤の使用量としては冷却液組成物の０．１〜１０重量％となるように使用することが望ましい。 A rust preventive agent may be contained alone in the coolant composition, or may be contained in combination of a plurality of types. The amount of the rust inhibitor used is desirably 0.1 to 10% by weight of the coolant composition.
また本発明の冷却液組成物には、上述の成分の他に、例えば消泡剤、着色剤、酸化防止剤、ｐＨ調整剤、安定剤、湿潤剤、金属不活性剤、粘度指数向上剤、流動点低下剤、耐摩耗剤、紫外線吸収剤、洗浄剤等を必要に応じて適宜加えることができる。 In addition to the above-described components, the cooling liquid composition of the present invention includes, for example, an antifoaming agent, a colorant, an antioxidant, a pH adjuster, a stabilizer, a wetting agent, a metal deactivator, a viscosity index improver, A pour point reducing agent, an antiwear agent, an ultraviolet absorber, a cleaning agent, and the like can be appropriately added as necessary.
以下に本発明の実施例と比較例を示して説明する。
参考例、実施例及び比較例
下記表１に、防錆剤を含有する冷却液(I)の組成を示す。この冷却液(I)を用いて下記表２〜６に示すように、一般式（１）で表されるアルキルエーテル(１)、又は一般式（１）で表されるアルキルエーテル(１)と一般式（２）で表されるアルキルエーテル(２)と、カルボキシメチルセルロース(ＣＭＣ)、ポリカルボン酸(ＰＡＡ)、ポリビニルピロリドン(ＰＶＰ)及び水、場合によりさらにノニオン界面活性剤、アニオン界面活性剤を含有するように混合して参考例、実施例及び比較例の冷却液組成物を作成した。
得られた各冷却液組成物について温度を変化させながらJIS K2283に基づき動粘度を測定した。各実施例及び比較例の冷却液組成物の動粘度の温度依存性を表２〜６に示し、この結果をさらに図１〜８にて図示する。この図は、JIS K2283附属書１に示される動粘度−温度チャートに基づき作図されたものであり、縦軸がloglog(動粘度)、横軸がlog(273.15+温度（℃）)の目盛りである。
Examples of the present invention and comparative examples will be described below.
Reference Examples, Examples and Comparative Examples Table 1 below shows the composition of the coolant (I) containing a rust inhibitor. As shown in Tables 2 to 6 below using this cooling liquid (I), the alkyl ether (1) represented by the general formula (1) or the alkyl ether (1) represented by the general formula (1) An alkyl ether (2) represented by the general formula (2), carboxymethylcellulose (CMC), polycarboxylic acid (PAA), polyvinylpyrrolidone (PVP) and water, and optionally a nonionic surfactant and an anionic surfactant. It mixed so that it might contain, and the coolant composition of the reference example, the Example, and the comparative example was created.
The kinematic viscosity was measured based on JIS K2283 while changing the temperature of each of the obtained coolant compositions. Tables 2 to 6 show the temperature dependence of the kinematic viscosities of the coolant compositions of the examples and comparative examples, and the results are further illustrated in FIGS. This figure is based on the kinematic viscosity-temperature chart shown in Annex 1 of JIS K2283. The vertical axis is loglog (kinematic viscosity) and the horizontal axis is log (273.15 + temperature (° C)). is there.
図１によれば、比較例１および２である冷却液(I)と水、冷却液(I)のみからなる冷却液は温度上昇につれて直線的に動粘度が低下する。しかしながら、参考例１の冷却液は、０℃から温度を上昇させることにより、低温域では一定の負の傾きにより直線的に動粘度が低下する。ここで、低温域では比較例２の冷却液(I)のみからなる冷却液と同等の高い動粘度を有するため、冷却損失が低減し、速やかにエンジンの最適温度まで上昇させることができる。
さらに加熱を行い５０℃から６０℃になると、その傾きが大きくなり急激に動粘度が低下する傾向が現れ、さらに高温になると再び低温域での温度変化に対する動粘度の傾きと同程度となる。この高温域では比較例１の冷却液(I)と水からなる冷却液と同等の動粘度の特性を示すため、エンジンを効率的に冷却することが可能となり、オーバーヒートを防止できる。
According to FIG. 1, the kinematic viscosity decreases linearly as the temperature rises in the cooling liquids (I), water, and the cooling liquid (I) that are the comparative examples 1 and 2 only. However, in the coolant of Reference Example 1, the kinematic viscosity decreases linearly with a constant negative slope in the low temperature range by increasing the temperature from 0 ° C. Here, in the low temperature range, it has a high kinematic viscosity equivalent to that of the coolant (I) of Comparative Example 2 alone, so that the cooling loss is reduced and the engine temperature can be quickly raised.
When the temperature is further increased from 50 ° C. to 60 ° C., the inclination increases and the kinematic viscosity tends to decrease rapidly. When the temperature is further increased, the inclination becomes the same as the inclination of the kinematic viscosity with respect to the temperature change in the low temperature region. In this high temperature region, the kinematic viscosity characteristic equivalent to that of the coolant (I) of Comparative Example 1 and water is exhibited, so that the engine can be efficiently cooled and overheating can be prevented.
図２によれば、比較例３〜５である一般的に増粘剤として使用されるＣＭＣ、ＰＡＡ、ＰＶＰを添加した冷却液の低温域での動粘度は、アルキルエーテルを添加した参考例２とほぼ同等の動粘度挙動を示すが、５０℃をこえても動粘度が低下する傾向は現れず、高温域まで同じ傾きのまま、動粘度が低下する。
他方、参考例２によると、低温域においては比較例３〜５による動粘度と同様の温度特性を示すが、４０〜５５℃程度の温度域においては動粘度が急激に低下し、５５℃程度以上の温度域においては、比較例１と同様の動粘度特性を示す。
According to FIG. 2, the kinematic viscosity in the low temperature range of the cooling liquid to which CMC, PAA, and PVP, which are generally used as thickeners as Comparative Examples 3 to 5, are added, is Reference Example 2 in which alkyl ether is added. However, even if the temperature exceeds 50 ° C., there is no tendency for the kinematic viscosity to decrease, and the kinematic viscosity decreases with the same inclination up to the high temperature range.
On the other hand, according to Reference Example 2, the temperature characteristics similar to those of Comparative Examples 3 to 5 are exhibited in the low temperature range, but the kinematic viscosity rapidly decreases in the temperature range of about 40 to 55 ° C, and about 55 ° C. In the above temperature range, the same kinematic viscosity characteristic as in Comparative Example 1 is exhibited.
図３〜５によれば、参考例３〜１１である一般式（１）で表されるアルキルエーテル（１）を添加した冷却液は、参考例１及び２と同様に低温域では高い動粘度を有し、高温域では急激に低い動粘度に変化するため、上述のようにエンジンを円滑に作動させることが可能となる。
しかしながら、参考例１〜１１である一般式（１）で表されるアルキルエーテル（１）のみを含有する冷却液組成物は、１００℃まで温度を上昇させるとアルキルエーテル（１）が温度上昇により脱水和し、疎水化することにより、冷却液(I)の水溶液と分離する現象が起こっていた。１００℃で分離することは、エンジンの冷却システムの中では望ましくないとされ、しばしば問題視されることがあった。
According to FIGS. 3-5, the cooling liquid which added the alkyl ether (1) represented by General formula (1) which is Reference Examples 3-11 is high kinematic viscosity in a low temperature area similarly to Reference Examples 1 and 2. Since the kinematic viscosity changes rapidly in the high temperature range, the engine can be operated smoothly as described above.
However, in the coolant composition containing only the alkyl ether (1) represented by the general formula (1) which is Reference Examples 1 to 11, when the temperature is increased to 100 ° C., the alkyl ether (1) is increased due to the temperature increase. The phenomenon of separation from the aqueous solution of the cooling liquid (I) occurred by dehydration and hydrophobization. Separating at 100 ° C. was considered undesirable in engine cooling systems and was often problematic.
ここで、一般式（１）で表されるアルキルエーテル(１)が１００℃において分離することを防止する目的で、ノニオン界面活性剤やアニオン界面活性剤を添加した比較例６〜１０の冷却液組成物の１００℃における状態を表３に示すが、いずれも分離してしまう。 Here, in order to prevent the alkyl ether (1) represented by the general formula (1) from separating at 100 ° C., the coolants of Comparative Examples 6 to 10 to which a nonionic surfactant or an anionic surfactant was added. The state of the composition at 100 ° C. is shown in Table 3, but both are separated.
表４及び表５、図６〜８によると、実施例１〜７には、本発明において一般式（１）で表されるアルキルエーテル（１）と一般式（２）で表されるアルキルエーテル（２）を含有する冷却液組成物の例が記載されており、１００℃における状態が、透明で分離していない。また、特に４０〜５０℃以下の低温域においては、動粘度が高くなり、４０〜５０℃程度の温度域において、動粘度が急激に低下し、それよりも高温域下においては比較例１と同様の特性を示す。
このような実施例１〜７においても、低温域では比較例２の冷却液(I)のみからなる冷却液と同等の高い動粘度を有するため、冷却損失が低減し、速やかにエンジンの最適温度まで上昇させることができ、高温域では比較例１の冷却液(I)と水からなる冷却液と同等の動粘度の特性を示すため、エンジンを効率的に冷却することが可能となり、オーバーヒートを防止できる。
一方、本発明の範囲である一般式（１）で表されるアルキルエーテル（１）と、本発明の範囲外であるアルキルエーテルを含有し、本発明の範囲外となる比較例１１〜１４、及び一般式（１）で表されるアルキルエーテルとアニオン界面活性剤ｆを含有する比較例１５に示される冷却液組成物は、１００℃における液の外観が透明であり、分離を認めないものの、低温域における動粘度が低くなり、低温域から高温域における温度に対する動粘度の傾きが比較例１で示される冷却液(I)と水からなる冷却液と同等の動粘度挙動となる。
このことから、本発明の範囲である一般式（１）で表されるアルキルエーテルと一般式（２）で表されるアルキルエーテルの両方を含有した場合にのみ、１００℃における液の分離を防止し、かつ４０〜６０℃の温度域において急激な動粘度低下を発現させることができることが示される。
According to Tables 4 and 5 and FIGS. 6 to 8, Examples 1 to 7 include an alkyl ether (1) represented by the general formula (1) and an alkyl ether represented by the general formula (2) in the present invention. An example of a coolant composition containing (2) is described, and the state at 100 ° C. is transparent and not separated. In particular, the kinematic viscosity becomes high in a low temperature range of 40 to 50 ° C. or less, and the kinematic viscosity is drastically decreased in a temperature range of about 40 to 50 ° C. Show similar characteristics.
In Examples 1 to 7 as well, in the low temperature range, since it has a high kinematic viscosity equivalent to that of the cooling liquid (I) of Comparative Example 2 alone, the cooling loss is reduced, and the optimum engine temperature is quickly achieved. In the high temperature range, it has the same kinematic viscosity characteristics as the coolant (I) and water coolant of Comparative Example 1, so that the engine can be cooled efficiently, and overheating is reduced. Can be prevented.
On the other hand, Comparative Examples 11-14 containing the alkyl ether (1) represented by the general formula (1) which is the scope of the present invention, and the alkyl ether which is outside the scope of the present invention, which are outside the scope of the present invention, The cooling liquid composition shown in Comparative Example 15 containing the alkyl ether represented by the general formula (1) and the anionic surfactant f has a transparent liquid appearance at 100 ° C., and no separation is observed. The kinematic viscosity in the low temperature range becomes low, and the slope of the kinematic viscosity with respect to the temperature from the low temperature range to the high temperature range becomes the kinematic viscosity behavior equivalent to that of the cooling liquid (I) and the cooling liquid composed of water shown in Comparative Example 1.
Therefore, separation of the liquid at 100 ° C. is prevented only when both the alkyl ether represented by the general formula (1) and the alkyl ether represented by the general formula (2), which are the scope of the present invention, are contained. In addition, it is shown that a rapid decrease in kinematic viscosity can be exhibited in a temperature range of 40 to 60 ° C.
※：ｐＨ７．６相当まで中和するのに必要な量
PAA：ポリカルボン酸(重量平均分子量6,000)
PVP：ポリビニルピロリドン(重量平均分子量1,200,000)
PAA: Polycarboxylic acid (weight average molecular weight 6,000)
PVP: Polyvinylpyrrolidone (weight average molecular weight 1,200,000)
ノニオン界面活性剤b：ポリオキシエチレンソルビタン脂肪酸エステル
ノニオン界面活性剤c：ポリオキシエチレンアルキルプロピレンジアミン
ノニオン界面活性剤d：ポリオキシエチレンβナフチルエーテル
アニオン界面活性剤e：ナフタレンスルホン酸ホルマリン縮合物Na
Claims (6)
Ｒ１−Ｏ−Ａｎ−Ｈ （１）
式中、Ｒ１は炭素数８〜３０の直鎖状又は分岐構造の飽和脂肪族炭化水素基、又は直鎖状又は分岐構造の不飽和脂肪族炭化水素基を示し、Ａはエチレンオキシド及び／又はプロピレンオキシドを示し、ｎはエチレンオキシド及び／又はプロピレンオキシドの平均付加モル数を示し、ｎは３〜１８である。
Ｒ２−Ｏ−Ｂｍ−Ｈ （２）
式中、Ｒ２は炭素数８〜３０の直鎖状又は分岐構造の飽和脂肪族炭化水素基、又は直鎖状又は分岐構造の不飽和脂肪族炭化水素基を示し、Ｂはエチレンオキシド及び／又はプロピレンオキシドを示し、ｍはエチレンオキシド及び／又はプロピレンオキシドの平均付加モル数を示し、ｍは３０以上である。 A coolant composition comprising an alkyl ether represented by the following general formula (1), an alkyl ether represented by the following general formula (2), and water and / or a water-soluble organic solvent.
R 1 —O—An—H (1)
In the formula, R 1 represents a linear or branched saturated aliphatic hydrocarbon group having 8 to 30 carbon atoms, or a linear or branched unsaturated aliphatic hydrocarbon group, and A represents ethylene oxide and / or Represents propylene oxide, n represents the average number of moles of ethylene oxide and / or propylene oxide, and n is 3 to 18.
R 2 —O—Bm—H (2)
In the formula, R 2 represents a linear or branched saturated aliphatic hydrocarbon group having 8 to 30 carbon atoms, or a linear or branched unsaturated aliphatic hydrocarbon group, and B represents ethylene oxide and / or Represents propylene oxide, m represents the average number of moles of ethylene oxide and / or propylene oxide, and m is 30 or more.
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