DK162224B - Benzthiazol-2-ylthiopolycarboxylsyrer samt baseadditionssalte deraf, fremgangsmaade til fremstilling af disse forbindelser, fremgangsmaade til korrosionsinhibering af vandige systemer under anvendelse af disse forbindelser, anvendelse af forbindelserne som korrosionsinhibitorer samt vandige systemer indeholdende forbindelserne som korrosionsinhibitorer - Google Patents
Benzthiazol-2-ylthiopolycarboxylsyrer samt baseadditionssalte deraf, fremgangsmaade til fremstilling af disse forbindelser, fremgangsmaade til korrosionsinhibering af vandige systemer under anvendelse af disse forbindelser, anvendelse af forbindelserne som korrosionsinhibitorer samt vandige systemer indeholdende forbindelserne som korrosionsinhibitorer Download PDFInfo
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- DK162224B DK162224B DK235384A DK235384A DK162224B DK 162224 B DK162224 B DK 162224B DK 235384 A DK235384 A DK 235384A DK 235384 A DK235384 A DK 235384A DK 162224 B DK162224 B DK 162224B
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- Prior art keywords
- acid
- formula
- corrosion
- ylthio
- compounds
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- 150000001875 compounds Chemical class 0.000 title claims description 60
- 238000005260 corrosion Methods 0.000 title claims description 44
- 230000007797 corrosion Effects 0.000 title claims description 44
- 150000003839 salts Chemical class 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 19
- 230000005764 inhibitory process Effects 0.000 title claims description 7
- 238000002360 preparation method Methods 0.000 title claims description 3
- -1 -C00H Chemical group 0.000 claims description 92
- 229910052739 hydrogen Inorganic materials 0.000 claims description 44
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 32
- 239000003112 inhibitor Substances 0.000 claims description 32
- 229910052799 carbon Inorganic materials 0.000 claims description 31
- 239000002253 acid Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 14
- 150000007513 acids Chemical class 0.000 claims description 10
- 125000001424 substituent group Chemical group 0.000 claims description 10
- 125000004181 carboxyalkyl group Chemical group 0.000 claims description 9
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 9
- 239000002585 base Substances 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052783 alkali metal Inorganic materials 0.000 claims description 5
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 5
- 150000002431 hydrogen Chemical group 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 125000004183 alkoxy alkyl group Chemical group 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 150000001768 cations Chemical group 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000004765 (C1-C4) haloalkyl group Chemical group 0.000 claims description 3
- 125000002853 C1-C4 hydroxyalkyl group Chemical group 0.000 claims description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 3
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 claims description 3
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 claims description 3
- 125000001302 tertiary amino group Chemical group 0.000 claims description 3
- 125000004642 (C1-C12) alkoxy group Chemical group 0.000 claims description 2
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 125000005037 alkyl phenyl group Chemical group 0.000 claims description 2
- 125000002947 alkylene group Chemical group 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 2
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 claims description 2
- 125000004400 (C1-C12) alkyl group Chemical group 0.000 claims 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 62
- 239000000243 solution Substances 0.000 description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 29
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 28
- 229910052757 nitrogen Inorganic materials 0.000 description 26
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 23
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 12
- 239000000047 product Substances 0.000 description 11
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- 229910052717 sulfur Inorganic materials 0.000 description 10
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 10
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- 239000000155 melt Substances 0.000 description 9
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- 239000002244 precipitate Substances 0.000 description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 description 7
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- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
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- 239000011734 sodium Substances 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 5
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000001530 fumaric acid Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 4
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- 229910052801 chlorine Inorganic materials 0.000 description 4
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- 238000010790 dilution Methods 0.000 description 4
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- 238000005555 metalworking Methods 0.000 description 4
- 150000002823 nitrates Chemical class 0.000 description 4
- 150000003751 zinc Chemical class 0.000 description 4
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 3
- ZPOQJHGXQZVXIO-UHFFFAOYSA-N 3-(1,3-benzothiazol-2-yl)-4-oxo-4-sulfanylbutanoic acid Chemical compound C1=CC=C2SC(C(C(O)=S)CC(=O)O)=NC2=C1 ZPOQJHGXQZVXIO-UHFFFAOYSA-N 0.000 description 3
- SZJUOARYXZWJIM-UHFFFAOYSA-N 3-(6-amino-1,3-benzothiazol-2-yl)-4-oxo-4-sulfanylbutanoic acid Chemical compound NC1=CC=C2N=C(C(CC(O)=O)C(O)=S)SC2=C1 SZJUOARYXZWJIM-UHFFFAOYSA-N 0.000 description 3
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- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
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- 229920000180 alkyd Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
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- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical class C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 3
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- 230000002401 inhibitory effect Effects 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
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- 239000011591 potassium Substances 0.000 description 3
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- RVDAYBAKAJCNNV-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-ylsulfanylmethyl)butanedioate;hydron Chemical compound C1=CC=C2SC(SCC(CC(=O)O)C(O)=O)=NC2=C1 RVDAYBAKAJCNNV-UHFFFAOYSA-N 0.000 description 2
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- SYQDDUZWZWENFF-UHFFFAOYSA-N 2-[(6-nitro-1,3-benzothiazol-2-yl)sulfanylmethyl]butanedioic acid Chemical compound C1=C([N+]([O-])=O)C=C2SC(SCC(CC(=O)O)C(O)=O)=NC2=C1 SYQDDUZWZWENFF-UHFFFAOYSA-N 0.000 description 2
- BSQLQMLFTHJVKS-UHFFFAOYSA-N 2-chloro-1,3-benzothiazole Chemical compound C1=CC=C2SC(Cl)=NC2=C1 BSQLQMLFTHJVKS-UHFFFAOYSA-N 0.000 description 2
- 125000001340 2-chloroethyl group Chemical group [H]C([H])(Cl)C([H])([H])* 0.000 description 2
- CWNNYYIZGGDCHS-UHFFFAOYSA-N 2-methylideneglutaric acid Chemical compound OC(=O)CCC(=C)C(O)=O CWNNYYIZGGDCHS-UHFFFAOYSA-N 0.000 description 2
- NLPZRWDNWKLLCI-UHFFFAOYSA-N 2-sulfanylidene-3h-1,3-benzothiazole-5-carboxylic acid Chemical compound OC(=O)C1=CC=C2SC(=S)NC2=C1 NLPZRWDNWKLLCI-UHFFFAOYSA-N 0.000 description 2
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- AHRGBNQQXOAACA-UHFFFAOYSA-N 3-(1,3-benzothiazol-2-ylsulfanyl)pentanedioic acid Chemical compound C1=CC=C2SC(SC(CC(O)=O)CC(=O)O)=NC2=C1 AHRGBNQQXOAACA-UHFFFAOYSA-N 0.000 description 2
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- IWLATUURQBCQPI-UHFFFAOYSA-N 4-(1,3-benzothiazol-2-ylsulfanyl)butane-1,2,3-tricarboxylate;hydron Chemical compound C1=CC=C2SC(SCC(C(CC(=O)O)C(O)=O)C(O)=O)=NC2=C1 IWLATUURQBCQPI-UHFFFAOYSA-N 0.000 description 2
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- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
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- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 2
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- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- ORTFAQDWJHRMNX-UHFFFAOYSA-N hydroxidooxidocarbon(.) Chemical compound O[C]=O ORTFAQDWJHRMNX-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
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- BKMQORYBYKGSNN-UHFFFAOYSA-L [Ca+2].C1=CC=C2SC(OC(=S)CCC(=O)[O-])=NC2=C1.C1=CC=C2SC(OC(=S)CCC(=O)[O-])=NC2=C1 Chemical compound [Ca+2].C1=CC=C2SC(OC(=S)CCC(=O)[O-])=NC2=C1.C1=CC=C2SC(OC(=S)CCC(=O)[O-])=NC2=C1 BKMQORYBYKGSNN-UHFFFAOYSA-L 0.000 description 1
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 1
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- QHFQAJHNDKBRBO-UHFFFAOYSA-L calcium chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ca+2] QHFQAJHNDKBRBO-UHFFFAOYSA-L 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
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- 125000004965 chloroalkyl group Chemical group 0.000 description 1
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- GTZCVFVGUGFEME-IWQZZHSRSA-N cis-aconitic acid Chemical compound OC(=O)C\C(C(O)=O)=C\C(O)=O GTZCVFVGUGFEME-IWQZZHSRSA-N 0.000 description 1
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 1
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- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 description 1
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- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- RODLEVQAZWKRIQ-UHFFFAOYSA-N methyl 2-sulfanylidene-3h-1,3-benzothiazole-5-carboxylate Chemical compound COC(=O)C1=CC=C2SC(S)=NC2=C1 RODLEVQAZWKRIQ-UHFFFAOYSA-N 0.000 description 1
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 125000004573 morpholin-4-yl group Chemical group N1(CCOCC1)* 0.000 description 1
- 125000006518 morpholino carbonyl group Chemical group [H]C1([H])OC([H])([H])C([H])([H])N(C(*)=O)C1([H])[H] 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 description 1
- 125000003136 n-heptyl 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])* 0.000 description 1
- JRRJNTPLKUZDQG-UHFFFAOYSA-N n-phenyl-2-sulfanylidene-3h-1,3-benzothiazole-5-carboxamide Chemical compound C=1C=C2SC(S)=NC2=CC=1C(=O)NC1=CC=CC=C1 JRRJNTPLKUZDQG-UHFFFAOYSA-N 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 1
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- 150000007530 organic bases Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002918 oxazolines Chemical class 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 125000003884 phenylalkyl group Chemical group 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 150000004714 phosphonium salts Chemical class 0.000 description 1
- ZJAOAACCNHFJAH-UHFFFAOYSA-N phosphonoformic acid Chemical class OC(=O)P(O)(O)=O ZJAOAACCNHFJAH-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003017 phosphorus Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 125000000587 piperidin-1-yl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
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- 229920000728 polyester Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
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- 239000010695 polyglycol Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
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- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical class CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011814 protection agent Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 229960003080 taurine Drugs 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000006158 tetracarboxylic acid group Chemical group 0.000 description 1
- 150000000000 tetracarboxylic acids Chemical class 0.000 description 1
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 1
- 150000003566 thiocarboxylic acids Chemical class 0.000 description 1
- 150000003567 thiocyanates Chemical class 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- 125000005208 trialkylammonium group Chemical group 0.000 description 1
- UCAJPHQTEWYXEA-UHFFFAOYSA-N triazine-4-carboxylic acid Chemical class OC(=O)C1=CC=NN=N1 UCAJPHQTEWYXEA-UHFFFAOYSA-N 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000002507 tricarboxylic acid group Chemical group 0.000 description 1
- 150000003628 tricarboxylic acids Chemical class 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
- C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
- C07D263/58—Benzoxazoles; Hydrogenated benzoxazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/24—Benzimidazoles; Hydrogenated benzimidazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
- C07D235/28—Sulfur atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/60—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings condensed with carbocyclic rings or ring systems
- C07D277/62—Benzothiazoles
- C07D277/68—Benzothiazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
- C07D277/70—Sulfur atoms
- C07D277/74—Sulfur atoms substituted by carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/16—Sulfur-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/16—Sulfur-containing compounds
- C23F11/165—Heterocyclic compounds containing sulfur as hetero atom
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Description
X
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Den foreliggende opfindelse angår hidtil ukendte benz-thiazol-2-ylthiopolycarboxylsyrer med den nedenfor anførte formel I og baseadditionssalte deraf, en fremgangs-5 måde til fremstilling af forbindelserne med formlen 1, en fremgangsmåde til korrosionsinhibering i vandige systemer i kontakt med metal under anvendelse af forbindelserne ifølge opfindelsen, anvendelsen af forbindelserne ifølge opfindelsen som korrosionsinhi-10 bitorer i vandige systemer samt vandige systemer indeholdende en forbindelse ifølge opfindelsen som korrosionsinhibitor .
Benzthiazol-2-ylthiopolycarboxylsyrerne ifølge opfindelsen er ejendommelige ved, at de har den almene formel
R
R · N , \/\/\ R1 R2
• ; \ II
C-S—c —)—CH I
• · / I n| ΑΛ/ r3 i4 R · s
R
hvori substituenterne R hver for sig betyder hydrogen, Ci-Ci2_alkyl, Ci-Ci2-alkoxy, Ci~C4-halogenalkyl, Ci~Ci2~ alkylthio, Ci“Ci2-alkY1sulfonyl, phenyl, C7-Ci6"alkY1-phenyl, Cy-C^g-phenylalkyl, C5-Cg-cycloalkyl, halogen, 20 -NO2, -CN, -C00H, -C00(Ci-C4-alkyl), -OH eller en pri mær, sekundær eller tertiær amino- eller carbamoylgruppe med højst 20 carbonatomer, n er 0 eller 1, og, når n er 1, R1, R2, R3 og R4 hver for sig betyder Η, Οχ-Οιβ-31^1 / Ci,-C4-hydroxyalkyl, C2“Ci2-carboxyalkyl, Ci-C4~halogen-25 alkyl, C2-Cio-alkoxYalkyl, -C00H, phenyl eller benzyl, eller Ri og R2 eller R^ og R3 sammen betyder uforgrenet eller forgrenet Cø-Cg-alkylen, som kan være substitueret med 1 eller 2 carbonylgrupper, eller R1 og R2 sammen
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2 betyder en direkte binding, og, når n er 0, R2 og R^ betyder carboxyl eller med 1 eller 2 carboxylgrupper substitueret phenyl, idet dog gruppen med formlen R1 R2
I I
-(-C-)-GH
3 14
R R
5 indeholder mindst to og højst fire carboxylgrupper.
Fra US-patentskrift nr. 2.725.364 kendes.estere af benz-thiazol-2-yl-thioravsyre med formlen / \ / \ ch2-coor° I II C-S-CH-C00R0, \ A / • s hvori R° betyder en carbonhydrid- eller oxacarbonhydrid-10 gruppe med 3-12 carbonatomer, og som kan anvendes som blødgørere for vinylchloridpolymerisater. De kendte estere fremstilles ved basekatalyseret addition af maleinsyreestere til 2-mercaptobenzthiazol. Det anføres, at estrene også kan fremstilles ved esterificering af den tilsvarende di-15 carboxylsyre (R° = H), og at denne dicarboxylsyre kan fremstilles Ved addition af malein- eller fumarsyre til 2-mercaptobenzthiazol i vandig-basisk medium. Detaljer vedrørende egenskaberne og fremstillingen af denne carboxylsyre anføres imidlertid ikke. Det er blevet påvist, at 2-20 mercaptobenzthiazol i vandigt-basisk medium reagerer med malein- eller fumarsyre. Det er endvidere blevet påvist, at den på anden måde fremstillede benzthiazol-2-ylthio-ravsyre langsomt spaltes i vandigt-basisk medium ved 45-50°C til 2-mercaptobenzthiazol og fumarsyre.
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3
Det har vist sig, at denne dicarboxylsyre og benzthiazol-2-ylthiopolycarboxylsyrerne med den almene formel I kan fremstilles på anden måde. Der foretrækkes forbindelserne 5 med formlen i, hvori n er 1.
R som alkyl kan eksempelvis betyde methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, n-hexyl, 2-ethylbutyl, n-heptyl, n-octyl, 1,1,3,3-tetramethylbutyl, n-nonyl, iso-nonyl, n-decyl, n-undecyl 10 eller n-dodecyl. R som halogenalkyl kan eksempelvis betyde chlormethyl, trichlormethyl, mono-, di- eller trifluor-methyl eller 2-chlorethyl. R som alkoxy kan eksempelvis betyde methoxy, ethocy, propyloxy, isopropyloxy, butyloxy, hexyloxy, oxtyloxy eller dodecyloxy. R som alkylthio kan ek-15 sempelvis betyde methylthio, ethylthio, isopropylthio, n-butylthio, tert-butylthio, n-hexylthio eller n-dodecyl-thio. R som alkylsulfonyl kan eksempelvis betyde methyl-sulfonyl, tert-butylsulfonyl, n-octylsulfonyl, 2-ethylhexyl-sulfonyl eller n-dodecylsulfonyl. R som alkylphenyl kan 20 f.eks. betyde tolyl, xylyl, ethylphenyl, tert-butylphenyl, hexylphenyl eller nonylphenyl. R som phenylalkyl kan eksempelvis betyde benzyl, 1-phenylethyl, 2-phenylethyl eller 1-phenylbutyl. R som cycloalkyl kan f.eks. betyde cyclopentyl, cyclohexyl eller cyclooctyl. R som -COOalkyl kan 25 eksempelvis betyde methoxycarbpnyl, ethoxycarbonyl, iso-propoxycarbonyl eller butoxycarbonyl. R som halogen kan f.eks. betyde fluor, chlor eller brom. R som primær, sekundær eller tertiær aminogruppe kan eksempelvis betyde en amino-, isorpoylamino-, anilino-, tert-butylamino-, di-30 methylamino-, dethylamino-, dipropylamino-, di(hydroxyethyl)-amino-, dibutylamino-, dioctylamino- cyclohexylamino-, N-methylanilino-, N-methyl-benzylamino-, piperidino- eller morpholinogruppe. R som primær, sekundær eller tertiær carbamoylgruppe kan f.eks. betyde -CON^/ -CONHCH^, 35 -CONHphenyl, -CONHcyclohexyl, -CON -CON (CgH.^) 2 eller morpholinocarbonyl eller piperidinocarbonyl.
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4
Det foretrækkes, at en af substituenterne R betyder hydrogen, C^-C'4-alkyl, C^-C^-alkoxy eller amino, og de andre tre substi tuen ter R betyder hydrogen. Det foretrækkes især, at alle fire substituenter R betyder hydrogen.
5 R^, R2, R2 og R4 som alkyl kan eksempelvis betyde methyl, ethyl, n-propyl, isopropyl, n~butyl, isobutyl, n-pentyl, n-hexyl, n-octyl, isooctyl, n-decyl, n-dodecyl, n-hexadecyl 12-5 4 eller n-octadecyl. R , R , RJ og R som hydroxy- eller alk-oxyalkyl kan eksempelvis betyde hydroxymethyl, 1-hydroxyethyl, 10 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 2-hydroxy-butyl, 2-methoxyethyl, isopropoxymethyl, 2-butoxyethyl, octyloxymethyl, 2-ethoxypropyl eller 3-methoxypropyl. R^, 2 3 4 R , R og R som halogenalkyl kan betyde fluor- eller chlor-alkyl, såsom f.eks. mono-, di- eller trifluormethyl, chlor-15 methyl eller 2-chlorethyl. R^, R2, R^ og R4 som carboxyalk-yl kan betyde mono-, di- eller tricarboxyalkyl, f.eks. carboxymethyl, 1- eller 2-carboxyethyl, 1-, 2- eller 3-carboxypropyl, 1-carboxyisopropy1, 4-carboxybutyl, 6-carboxyhexyl, 11-carboxyundecyl, 1,2-dicarboxyethyl, 2,3-20 dicarboxypropyl eller 2,3,4-tricarboxybutyl.
12 13 Når R og R eller R og R sammen betyder alkylen, danner de sammen med de carbonatomer, hvortil de er bundet, en cycloaliphatisk ring, især en cyclopentan- eller cyclo-hexanring, som kan være substitueret med lavalkylgrupper 25 eller med 1 eller 2 carboxylgrupper.
1 2 Når R og R sammen betyder en direkte binding, er forbindelserne med formlen I umættede polycarboxylsyrer.
Når n er 0, er R2 og R4 carboxyl eller carboxyalkyl. Når 12 3 4
n er 1, er mindst to af substituenterne R , R , R og R
1 2 30 carboxyl eller carboxyalkyl. Fortrinsvis betyder R , R , 3 4 R og R hver for sig H, C^-C-^-alkyl, C^-C^-hydroxyalkyl, C2“Cg-carboxyalkyl, ^-CiQ-alkoxyalkyl, carboxyl, phenyl eller benzyl, eller R og R2 sammen betyder trimethylen 1 2 eller tetramethylen. Det foretrækkes især, at R , R , 1 R"^ og R4 betyder hydrogen, C^-C^-alkyl, carboxyl eller
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C9-Cfi-carboxyalkyl. Endvidere foretrækkes forbindelser, Δ ° 12 3 4 hvori to af substituenterne R , R , R og R betyder carboxyl eller carboxyalkyl.
Som følge af denne definition er gruppen med formlen R1 R2
I I
5 — '3 '4 R R4 en di-, tri- eller tetracarboxylsyregruppe, fortrinsvis en dicarboxylsyregruppe. Som eksempler på sådanne grupper kan nævnes dicarboxymethyl, 1,2-dicarboxyethyl, 1,2-dicarboxyethenyl, 1,2-dicarboxypropyl, 2,3-dicarboxypropyl, 10 l,3-dicarboxy-2-propyl, 1,3-dicarboxypropyl, 1,2-dicarboxy-1-enyl, 2,3-dicarboxy-l-phenylpropyl, 2,3-dicarboxy-l,l-diphenylpropyl, 1,2-dicarboxy-2-methylpropyl, 2,3-dicarb-oxy-2-butyl, 1,2-diearboxybutyl, 2,4-dicarboxybutyl, 3,4-dicarboxybutyl, 1,4-dicarboxybutyl, 3,4-dicarboxy-3-hexyl, 15 1,2,3-tricarboxypropyl, 2,3,4-tricarboxybutyl, 1,1,2,2-tetracarboxyethyl, 2,4,6,8-tetracarboxyoctyl, 1,2-, 2,3-eller 3,4-dicarboxycyclohexyl.
Baseadditionssaltene af disse forbindelser er fortrinsvis salte af alkalimetaller, jordalkalimetaller, metaller fra 20 gruppe IIB, IIIA eller VIII i det periodiske system eller salte af ammoniak eller af organiske aminer, især natrium-, kalium-, calcium-, magnesium-, zink-, aluminium- eller ammoniumsalte eller salte af primære, sekundære eller tertiære aminer, f.eks. af methylamin, ethanolamin, di-25 ethylamin, dibutylamin, diethanolamin, cyclohexylamin, trimethylamin, tri(isopropyl)amin, trioetylamin, triethanol-amin eller af tekniske aminblandinger.
Som eksempler på enkelte forbindelser med formlen I kan nævnes følgende: 30 Benzthiazol-2-ylthio-malonsyre, benzthiazol-2-ylthio-rav-syre, 5-methylbenzthiazol-2-ylthio-ravsyre, 5-trifluor-methylbenzthiazol-2-ylthio-ravsyre, 6-ethylbenzthiazol-2-ylthio-ravsyre, 4-isopropylbenzthiazol-2-ylthio-ravsyre, 7-t-butylbenzthiazol-2-ylthio-ravsyre, 5-n-hexylbenzthiazol- 6
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2-ylthio-ravsyre, 6-[1,1,3,3-tetramethylbutyl]-benzthiazol-2-ylthio-ravsyre, 6-cyclohexylbenzthiazol-2-ylthio-ravsyre, 7-benzylbenzthiazol-2-ylthio-ravsyre, 6-methoxybenzthiazol-2-ylthio-ravsyre, 6-ethoxybenzthiazol-2-ylthio-ravsyre, 7-5 ethoxybenzthiazol-2-ylthio-ravsyre, 5-methoxybenzthiazol-2-ylthio-ravsyre, 4-methylthiobenzthiazol-2-ylthio-ravsyre, 4- fluorbenzthiazol-2-ylthio-ravsyre, 5-chlorbenzthiazol-2-ylthio-ravsyre, 7-brombenzthiazol-2-ylthio-ravsyre, 6-chlorbenzthiazol-2-ylthio-ravsyre, 4-phenylbenzthiazol- 10 2-ylthio-ravsyre, 6-nitrobenzthiazol-2-ylthio-ravsyre, 5- carboxybenzthiazol-2-ylthio-ravsyre, 5-ethoxycarbonyl-benzthiazol-2-ylthio-ravsyre, 7-hydroxybenzthiazol-2-ylthio-ravsyre, 5-chlor-6-n-butylbenzthiazol-2-ylthio-ravsyre, 5-brom-5-n-hexylbenzthiazol-2-ylthio-ravsyre, 5-nitro-6-n- 15 propylbenzthiazol-2-ylthio-ravsyre, 5-cyanobenzthiazol-2-yl-thio-ravsyre, 5-brom-6-n-propoxybenzthiazol-2-ylthio-rav-syre, 6-aminobenzthiazol-2-ylthio-ravsyre, 6-raethylamino-benzthiazol-2-yl-ravsyre, 6-dimethylaminobenzthiazol-2-yl-ravsyre, 7-phenylaminobenzthiazol-2-yl-ravsyre, 4-dibenzyl-20 aminobenzthiazol-2-yl-ravsyre, 4-morpholinobenzthiazol-2-yl-ravsyre, 5-carbamoylbenzthiazol-2-yl-ravsyre, 5-methylcarb-amoylbenzthiazol-2-yl-ravsyre, 5-diethylcarbamoylbenzthiazol-2-yl-ravsyre, 6-phenylcarbamoylbenzothiazol-2-yl-ravsyre, 5,6-dimethyl-benzthiazol-2-ylthio-ravsyre, 4,5,6-triethyl-25 benzthiazol-2-ylthio-ravsyre, 4,5,6,7-tetramethylbenzthia-zol-2-ylthio-ravsyre, 1-(benzthiazol-2-ylthio)-propan-1,2-dicarboxylsyre, 1-(4-phenylbenzthiazol-2-ylthio)-propan-1, 2-dicarboxylsyre, 3-(benzthiazol-2-ylthio)-propan-1,2-dicarboxylsyre, 3-(6-trifluormethylbenzthiazol-2-yl)-propan-30 1,2-dicarboxylsyre, 3-(6-methoxycarbonylbenzthiazol-2-yl)- propan-1,2-dicarboxylsyre, 3-(6-aminobenzthiazol-2-yl)-propan-1,2-dicarboxylsyre, 3-(4-morpholinobenzthiazol-2-yl)-propan-1,2-dicarboxylsyre, 1-(benzthiazol-2-ylthio)-propan-1, 3-dicarboxylsyre, 1-(6-ethylthiobenzthiazol-2-ylthio)-35 propan-1,3-dicarboxylsyre, 2-(benzthiazol-2-ylthio)-propan-1, 3-dicarboxylsyre, 2-(5-carboxybenzthiazol-2-ylthio)-propan-1, 3-dicarboxylsyre, 3-(benzthiazol-2-ylthio)-3-phenylpropan-
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7 1.2- dicarboxylsyre, 3-(benzthiazol-2-ylthio)-3,3-di-phenylpropan-1,2-dicarboxy1syre, 1-(benzthiazol-2-yl-thio)-butan-1,2-dicarboxylsyre, 1-(4-methoxy-6-hydroxy- 5 benzthiazol-2-ylthio)-butan-1,2-dicarboxylsyre, 1-benz-thiazol-2-ylthio)-propan-2,3-dicarboxylsyre, 1- (4,5-dimethyl-7-propoxybenzthiazol-2-ylthio)-propan- 2, 3-dicarboxylsyre, 1-(benzthiazol-2-ylthio)-2-methylpropan- 1.2- dicarboxylsyre, 2-(benzthiazol-2-ylthio)-2,3-dicarb-10 oxylsyre, 1-(benzthiazol-2-ylthio)-butan-2,4-dicarboxyl- syre, 4-(benzthiazol-2-ylthio)-butan-1,2,3-tricarboxyl-syre, 4-(benzthiazol-ylthio)-butanl,4-dicarboxylsyre, 1-(benzthiazol-2-ylthio)-pentan-1,5-dicarboxylsyre, 1-(benz-thiazol-2-ylthio)-hexan-1,6-dicarboxylsyre, 4-(benzthiazol-15 2-ylthio)-cyclohexan-l,2-dicarboxylsyre, 1-(benzthiazol-2-ylthio)-cyclohexan-1,2-dicarboxylsyre, 1-(benzthiazol-2-ylthio)propan-1,2,3-tricarboxylsyre, 3-(benzthiazol-2-yl-thio)-3-chlorpropan-1,3-dicarboxylsyre, 1-(benzthiazol- 2- ylthio)-3-methoxypropan-l,2-dicarboxylsyre, 1-(benzthia-20 zol-2-ylthio)-3-hydroxypropan-l,2-dicarboxylsyre, l-(benz- thiazol-2-ylthio)-2-phenyl-ravsyre, 1-(benzthiazol-2-ylthio)-2-benzyl-ravsyre, 1-(benzthiazol-2-ylthio)-3-ethylbutan- .
1.3- dicarboxylsyre, 3-(benzthiazol-2-ylthio)-hexan-3,4-dicarboxylsyre, samt baseadditionssaltene af disse for- 25 bindeiser, såsom f.eks. natrium-, kalium-, calcium-, magnesium-, zink-, cobalt-, aluminium-, ammonium-, mono-, di- og trialkylammonium-, cyclohexylammonium- eller tris-hydroxyethyl-ammoniumsalte.
Fremgangsmåden ifølge opfindelsen til fremstilling af 30 forbindelserne med formlen I er ejendommelig ved, at man omsætter en forbindelse med formlen
R
R · N
VY\ 1 II C-A II, Λ A /
R · S
R
8
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hvori R har den ovenfor angivne betydning, og A betyder en fraspaltningsgruppe, med en forbindelse med formlen R1 R2 M-S—hUAh (III) l3 4
R R
5 hvori n, R^·, R^, r3 Qg R^ har de ovenfor angivne betydninger, og M betyder hydrogen eller en kation, eller omsætter en forbindelse med formlen
R
R · N
vv\ I 11 c-s-m (IV) A A /
R · S
R
hvori R har den ovenfor angivne betydning, og M betyder 10 hydrogen eller en kation, med en forbindelse med formlen R1 R2
II
A-(—C-4—CH (V)
l3 U
RJ R* hvori Ri, r2, r3, r4 Qg n har de ovenfor angivne betydninger, og A betyder en fraspaltningsgruppe.
9
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Disse omsætninger kan sædvanlivis gennemføres i nærværelse af en organisk eller uorganisk base. Som eksempler på sådanne baser kan nævnes tertiære aminer, ammoniumhydroxid, natriummethoxid, natrium- eller kaliumhydroxid eller natri-5 umcarbonat. Når der anvendes et tilsvarende overskud af base, udfældes produktet med formlen I først som basesalt, hvorfra den frie carboxylsyre kan fås ved neutralisation med en syre.
Omsætningerne kan gennemføres i et organisk opløsnings-10 middel, f.eks. i methanol, ethanol, acetonitril, toluen, chloroform, dimethylsulfoxid eller dimethylformamid. Det foretrækkes at gennemføre omsætningen i et vandigt-basisk medium, f.eks. i vandig natriumcarbonatopløsning eller vandig natriumhydroxidopløsnijg. Isoleringen af produktet 15 kan foretages ved tilsætning af en mineralsyre.
Omsætningerne kan gennemføres ved stuetemperatur eller forhøjet temperatur, hvor man arbejder fortrinsvis ved temperaturer fra 50 til 100°C.
Visse forbindelser med formlen I kan omdannes til andre 20 forbindelser med formlen I ved anvendelse af kendte fremgangsmåder. Eksempelvis kan en forbindelse med en nitrogruppe i benzogruppen ved hydrogenering omdannes til den tilsvarende aminoforbindelse.
Som eksempler på forbindelser med formlen II kan nævnes: 25 5-methyl-2-brom-benzthiazol, 6-ethyl-2-chlor-benzthiazol, 4- isopropyl-2-iod-benzthiazol, 7-t-butyl-2-brom-benzthiazol, 5- n-hexyl-2-brom-benzthiazol, 6-(1,1,3,3-tetramethylbutyl)-2-chlor-benzthiazol, 6-cyclohexyl-2-iod-benzthiazol, 7-benzyl-2-chlor-benzthiazol, 5-trifluormethyl-2-chlorbenz- 30 thiazol, 6-methoxy-2-toluensulfonyloxy-benzthiazol, 6-ethoxy-2-chlor-benzthiazol, 7-ethoxy-2-chlor-benzthiazol, 5-methoxy-2-iod-benzthiazol, 5-ethoxycarbonyl-2-brom-benzthiazol, 4-methylthio-2~brom-benzthiazol, 6-isopropoxy-2-chlor-benzthiazol, 5-cyano-2-chlor-benzthiazol, 4-fluor-
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10 2-chlor-benzthiazol,5-chlor-2-brom-benzthiazol, 6-chlor-2-iod-benzthiazol, 4-phenyl-2-chlor-benzthiazol, 6-nitro-2-chlor-benzthiazol, 6-methylsulfonyl-2-chlor’-benzthiazol, 5- carboxy-2-iod-benzthiazol, 7-hydroxy-2-chlor-benzthiazol, 5- 6-amino-2-chlor-benzthiazol, 5-chlor-6-n-buty1-2-brom- benzthiazol, 4-brom-5-n-hexyl-2-chlor-benzthiazol, 5-nitro- 6- n-propyl-2-chlor-benzthiazol,- 5-brom-6-n-propoxy-2-iod-benzthiazol, 4-nitro-7-butyl-2-chlor-benzthiazol/ 4,5,6-triethyl-2-brom-benzthiazol, 4,5,6,7-tetramethyl-2-chlor- 10 benzthiazol, 4-methoxy-6-hydroxy-2-chlor-benzthaizol, 4,5-dimethyl-7-propoxy-2-iod-benzthiazol, 5-dimethylamino-2-brom-benzthiazol, 4-morpholino-2-chlor-benzthiazol, 5-diethylcarbamoy1-2-brom-benzthiazol.
Som eksempler på reaktanter med formlen III kan nævnes: 15 mercaptoravsyre, trinatriumsaltet af mercaptoravsyre, 2-mercapto-3,3-dimethyl-ravsyre, 2- eller 3-mercaptoglutar-syre, 2-(mercaptomethyl)-ravsyre, 2-mercapto-3-methylravsy-re, 2-mercapto-3-ethylravsyre, 2-(mercaptomethyl)-glutar-syre, 2-mercapto-tricarballylsyre, 1-mercapto-ethan-l,1,2,2-20 tetracarboxylsyre, l-mercaptocyclohexan-l,2-dicarboxylsyre, 2- mercapto-2,3-diethyl-ravsyre, 2-mercapto-3-chlormethyl-ravsyre, 2-mercapto-3-methoxymethyl-ravsyre, 2-mercapto- 3- hydroxymethyl-ravsyre, 2-mercapto-3-phenyl-ravsyre og 2-mercapto-3-benzyl-ravsyre. 1 2 3 4 5 6 7 8 9 10 11
Eksempler på forbindelser med formlen IV er 5-methyl-2-mer- 2 capto-benzthiazol, 6-ethyl-2-mercapto-benzthiazol, 4-iso- 3 propyl-2-mercapto-benzthiazol, 7-t-butyl-2-mercapto-benz- 4 thiazol, 5-n-hexyl-2-mercapto-benzthiazol, 6-(1,1,3,3-tetra- 5 methylbutyl)-2-mercapto-benzthiazol, 6-cyclohexyl-2-mercap“ 6 to-benzthiazol, 7-benzyl-2-mercapto-benzthiazol, 5-trifluor- 7 methyl-2-mercapto-benzthiazol, 6-methoxy-2-mercapto-benz- 8 thiazol, 6-ethoxy-2-mercapto-benzthiazol, 7-ethoxy-2-mer- 9 capto-benzthiazol, 5-methoxy-2-mercapto-benzthiazol, 4- 10 methylthio-2-mercapto-benzthiazol, 6-methylsulfonyl-2- 11 mercapto-benzthiazol, 6-isopropyl-2-mercapto-benzthiazol, 4- fluor-2-mercapto-benzthiazol, 5-chlor-2-mercapto-benzthia-zol, 7-brom-2-mercapto-benzthiazol, 6-chlor-2-mercapto-benz-
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11 thiazol, 4-(phenyl-2-mereapto)-benzthiazol, 6-nitro-2-mer-capto-benzthiazol, 5-cyano-2-mercapto-benzthiazol, 5-carb-oxy-2-mercapto-benzthiazol, 5-methoxycarbonyl-2-mercapto-benzthiazol-, 7-hydroxy-2-mercapto-benzthiazol, 6-amino-2-5 mercapto-benzthiazol, 5-dimethylainino-2-mercapto-benzthia-zol, 5-morpholino-2-mercapto-benzthiazol, 5-carbamoyl-2-mercapto-benzthiazol, 5-phenylcarbamoyl-2-mercapto-benz-thiazol, 5-chlor-6-n-butyl-2-mercapto-benzthiazol, 4-brom- 5-n-hexyl-2-mercapto-benzthiazol, 5-nitro-6-n-propyl-2-10 mercapto-benzthiazol, 4-nitro-7-butyl-2-mercaptO“benzthia-zol, 4,5,6-triethyl-2-mercapto-benzthiazolf 4,5,6,7-tetramethyl-2-mercapto-benzthiazol, 4-methoxy-6-hydroxy-2-mercapto-benzthiazol, 4,5-dimethyl-7-propoxy-2-mercapto-benzthiazol, samt saltene af disse forbindelser, f.eks.
15 natrium-, kalium-, calcium-, tetramethylammonium- eller tris-hydroxyethylammoniumsalte.
Som eksempler på reaktanter med formlen V kan nævnes: brommalonsyre, chlorravsyre, bromravsyre, p-toluensul-fonyloxyravsyre, 2-brom-3,3-dimethylravsyre, 2-chlor-20 methyl-ravsyre, 2-brommethyl-ravsyre, 2- eller 3-bromglu-tarsyre, 2-chlor-3-ethylravsyre, 2-iod-3,3-dimethylrav-syre, 2-brom-2,3-dimethylravsyre, 2-chlormethyl-glutar-syre, 2-(p-toluensulfonyloxymethyl)-glutarsyre, 2-brom-tricarballylsyre, 1-iodethantetracarboxylsyre, 1-brom-25 cyclohexan-l,2-dicarboxylsyre, 2-iod-2-butyl-ravsyre, 2-brom-3-methoxymethy1-ravsyre, 2-chlor-3-hydroxy-methylravsyre, 2-brom-3-phenylravsyre, 2-iod-3-benzyl-ravsyre, brommaleinsyre, 2-brom-3-methylmaleinsyre og 2-brom-2,3-dimethylfumarsyre. 1 2 3 4 5 6
Forbindelserne med formlen I, hvori betyder carboxyl, 2 kan også fremstilles ifølge den i EP-A-126.030 beskrevne 3 fremgangsmåde. Ifølge denne fremgangsmåde omsættes en 4 forbindelse med formlen IV, hvori M betyder hydrogen, i 5 stærkt surt medium med en a,β-umættet carboxylsyre med 6 formlen
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12 R1 R2 \ / C = C (VI) 3^ \
R COOH
Som eksempler på forbindelser med formlen VI kan nævnes maleinsyre, fumarsyre, mesaconsyre, citraconsyre, itacon-syre, aconitsyre, glutaconsyre eller methylenglutarsyre.
5 Forbindelserne med formlen I kan anvendes som korrosionsinhibitorer for metaller, f.eks. jern, stål, aluminium eller kobber, men først og fremmest for jernmetaller. Forbindelserne med formlen I anvendes først og fremmest i vandige systemer, som er i kontakt med metaller, f.eks. i 10 kølevandssystemer, klimaanlæg, dampgenereringsanlæg, anlæg til fordampning af havvand, opvarmnings- og kølevandskredsløb, vandige metalbearbejdningsvæsker, frostbeskyttelsesvæsker og hydraulikvæsker.
Fra EP-A-3817 er det kendt at anvende zink- og blysalte 15 af 2-mercaptobenzthiazol som korrosionsinhibitorer i overtræksmidler. Fra CH-patentskrift nr. 458.048 er det endvidere kendt at anvende 2-mercaptobenzoxazolderivater og 2-mercaptobenzimidazolderivater som tilsvarende thiocarboxylsyrer som korrosionsbeskyttelsesmiddel ved 20 papirfremstillingen. Fra GB-patentskrift nr. 1.028.924 er det tillige kendt at anvende a-benzthiazolylthioalkan-carboxylsyrer som korrosionsinbibitorer til smøremidler.
Desuden er det fra JP-patentskrift nr. 75/52065 (Chem.
Abstr. 83, 206268r) kendt at anvende benzimidazol-2-yl-25 thioravsyrer som farmaceutika. Endelig er det fra EP-A-93.908 kendt at anvende j8-(benzthiazol-2-ylthio)-o!-cyanoacrylsyrederivater som skadedyrsbekæmpelsesmidler.
Forbindelserne med den almene formel I og deres baseadditionssalte har en overraskende god korrosions-30 inhiberende virkning i forhold til de kendte forbindelser, hvilket illustreres nærmere i det efterfølgende eksempel 16.
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13
Opfindelsen angår således en fremgangsmåde til korrosionsbeskyttelse af vandige systemer, som er i kontakt med metaller, ved tilsætning af en korrosionsinhiberende mængde af en forbindelse med formlen I som defineret ovenfor til det 5 vandige system.
I praksis sættes forbindelsen med formlen I til det vandige system i en mængde på 0,1-50.000 ppm, fortrinsvis 1-500 ppm. Foruden korrosionsinhibitoren kan der også tilsættes andre addtitiver, som er kendt til anvendelse ved vandbehand-10 ling.
I tilfælde af rent vandige systemer, såsom kølevandssystemer, klimaanlæg, dampgenerringsanlæg, inddampningsanlæg for havvand, opvarmningskredsløb og kølevandskredsløb kan der som supplerende korrosionsinhibitorer f.eks. anvendes 15 vandopløselige zinksalte, phosphater, polyphosphater, phosphonsyrer og salte deraf, såsom acetodiphosphonsyre, phosphonocarboxylsyrer og salte deraf, som f.eks. nitrilo-tris(methylenphosphonsyre), methylaminodimethylenphosphono-carboxylsyrerne ifølge DE-offentliggørelsesskrift 20 nr. 2. 632.774, hydroxyphosphonoeddikesyre, 2-phosphonobu-tan-l,2,4-tricarboxylsyre og syrerne beskrevet i GB-patent-skrift nr. 1.572.406, chromater, såsom natriumchromat, nitrater, såsom natriumnitrat, nitriter, såsom natriumnitrit, molybdater, såsom natriummolybdat, wolframater, silikater, 25 benztriazoler og benztriazolderivater, N-acetylsarcosiner, N-acylamino-dieddikesyrer, ethanolaminer, fedtaminer, poly-carboxylsyrer, såsom polymalein- eller polyacrylsyre og salte deraf, copolymerisater af maleinsyre og af acrylsyre samt substitutionsderivater af sådanne (co)polymerisater. 1 2 3 4 5 6
Desuden kan der også tilsættes dispergeringshjælpemidler 2 som f.eks. polyacrylsyre og salte deraf, phosphinopoly- 3 carboxylsyrer (f.eks. som beskrevet i GB-patentskrift 4 nr. 1.458.235), hydrolyseret polyacrylonitril, polymeth- 5 acrylsyre og salte deraf, polyacrylamid og copolymere med 6 acryl- eller methacrylsyre, ligninsulfonsyre og salte deraf, taurin, naphthalensulfonsyre-formaldehyd-kondensater, stivelse og derivater deraf samt cellulosederivater. Som specifikke eksempler herpå kan nævnes 2-phosphonobutan-l,2,4-
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14 tricarboxylsyre, acetodiphosphonsyre, hydrolyseret poly-maleinsyreanhydrid og salte deraf, alkylphosphonsyrer, hydroxyphosphoneddikesyre, 1-aminoalkyl-l,1-diphosphon-syrer og salte deraf samt alkalimetalpolyphosphonater.
5 Endvidere kan der tilsættes fældningsmidler, såsom alkali-metalorthophosphater eller alkalimetalcarbonater, oxygenbindende stoffer, såsom alkalimetalsulfiter og hydraziner, komplekseringsmidler, såsom nitrilotrieddikesyre og salte deraf, skumdæmpningsmidler, såsom silicone, dicarboxylsyre-10 fedtamider, ethylenoxidaddukter af fedtalkoholer eller fedt-. amider, desinfektionsmidler, såsom aminer, kvaternære ammoniumsalte, chlorphenoler, sulfoner, thiocyanater, carba-mater, isothiazoloner, bromerede propionamider, triaziner, 'phosphoniumsalte, chlor og chlorafgivende.forbindelser 15 eller organotinforbindelser.
Det vandige system kan også være delvis vandigt som f.eks. i metalbearbejdningsvæsker, som kan fortyndes med vand.
Sådanne formuleringer kan eksempelvis anvendes til polering, boring, fræsning, skæring, savning, trækning eller børtling 20 af metaller. Med hensyn til deres formulering kan følgende typer anføres.
a) Vandige koncentrater af en eller flere korrosionsinhibitorer og eventuelt et eller flere antislid-additiver, som anvendes i fortynding på 1:50 til 1:100 som slibevæsker.
25 b) Polyglycoler indeholdende biocider, korrosionsinhibitorer og antislid-additiver, som anvendes i en fortynding på 1:20 til 1:40 som skæreolie og i en fortynding på 1:60 til 1:80 som slibeolie.
c) Halvsyntetiske skæreolier som under b), der desuden 30 indeholder 10-25% af en olie samt en tilsvarende mængde emulgator, således at de ved fortynding med vand forbliver gennemskinnelige.
d) Et emulgerbart mineraloliekoncentrat, der eksempelvis kan indeholde emulgatorer, korrosionsinhibitorer, højtryks- 35 additiver, biocider, skumdæmpningsmidler og andet. Disse koncentrater fortyndes sædvanligvis i forholdet 1:10 til
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15 1:50 med vand, hvorved der dannes en hvid uklar emulsion, e) Mineraloliekoncentrater svarende til d), som dog indeholder mindre olie og mere emulgator, og som ved en fortynding på 1:50 til 1:100 giver en gennemskinnelig emul-5 sion, og som anvendes som skæreolie og slibeolie.
Til sådanne partielt vandige systemer, der anvendes som metalbearbejdningsformuleringer, kan den omhandlede korrosionsinhibitor med formlen I anvendes alene eller i blanding med andre korrosionsinhibitorer eller andre additiver.
10 Som eksempler på andre korrosionsinhibitorer kan nævnes organiske syrer og estere og salte deraf, f.eks. benzoesyre, p-tert-butylbenzoesyre, natriumsebacat, triethanol-amin-laurat, isononansyre, triethanolaminsaltet af p-toluen-sulfonamidocapronsyre, triethanolaminsalte af 5-ketocarb-15 oxylsyrer beskrevet i beskrivelsen til EP-patentansøgning nr. 41.927, natriumsalte af N-lauroylsarcosin eller phen-oxyeddikesyre, nitrogenholdige forbindelser, som f.eks. fedtsyrealkanolamider, imidazoliner, oxazoliner, triazoler, især benztriazoler og mannichbaser afledt deraf, trialkanol-20 aminer, fedtaminer, uorganiske nitrater eller nitriter eller carboxytriaziner beskrevet i beskrivelsen til EP-patentansøgning nr. 46.139, phosphorholdige forbindelser, såsom aminphosphater, phosphonsyrer og salte deraf, f.eks. natrium-dihydrogenphsophat eller zinkphosphat, samt svovlholdige 25 forbindelser, som f.eks. Na-, Ca- eller Ba-petrolsulfonater eller natriumsaltet af mercaptobenzthiazol.
Som yderligere additiver kan anvendes højtrykadditiver. Disse er for det meste svovl-, phosphor- eller halogenholdige forbindelser, f.eks. sulfideret spermacetolie, sulfiderede 30 fedtstoffer, tritolylphosphat, chlorparaffiner eller ethoxylerede phosphorestere.
Vigtigt for anvendelsen af forbindelserne med formlen I i vandige systemer er deres gode forenelighed med hårdt vand.
Dette beror på den tilsvarende høje opløselighed af jord-35 alkalimetalsaltene af forbindelserne.
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Forbindelserne med formlen I er endvidere også egnede som korrosionsinhibitorer i malevarer, f.eks. i sådanne på basis af epoxidharpikser, polyurethaner, aminoplaster, acrylharpikser, polyestere og alkydharpikser. Andre eksem-5 pier er malevarer på basis af polyvinylbutyral, phenolhar- . pikser, polyvinylacetat, polyvinylchlorid, chlorkautsjuk, styren-butadien-copolymerer, tørrende olier eller celluloseestere. Malevarerne kan være et vandigt system eller en organisk opløsning eller de kan være opløsningsmiddelfri.
..10 Opfindelsen illustreres nærmere i de efterfølgende eksempler. De anførte dele og procenter er på vægtbasis medmindre andet er anført.
Eksempel 1
En opløsning af 39,4 g bromravsyre i 200 ml 10%'s vandig 15 natriumcarbonatopløsning sættes i løbet af 30 minutter under omrøring til en opløsning af 41,5 g 2-mercaptobenz-thiazol i 200 ml 10%’s natriumcarbonatopløsning ved 80°C.
Den dannede opløsning omrøres i yderligere 2 timer ved 80°C. Der dannes en dispersion, som efter afkøling til 20 stuetemperatur ekstraheres med chloroform til fjernelse af uomsat mercaptobenzthiazol. Den vandige opløsning syr-nes med koncentreret saltsyre og ekstraheres med diethyl-ether. Etheropløsningen inddampes, og den faste remanens omkrystallisres fra vandig methanol. På denne måde får man 25 benzthiazol-2-ylthioravsyre, som smelter ved 175-178°C (under sønderdeling).
NMR-Spektrum (6, DMSO - dg): 3,15 (d, 2H)j 4,95 (t, IH); 7,20-8,20 (c, 4H).
Eksempel 2 30 En opløsning af 19,7 g bromravsyre i 100 ml 10%'s natriumcarbonatopløsning sættes i løbet af 30 minutter til en opløsning af 20,2 g 5-chlor-2-mercaptobenzthiazol og 4 g NaOH i 100 ml vand under omrøring. Den dannede suspension opvarmes i 2 timer til 90°C og filtreres efter afkøling.
35 Filtratet syrnes med koncentreret saltsyre til pH-værdien 1,
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17 hvorefter det udfældede produkt frafiltreret og omkrystal-liseres fra vandig ethanol. På denne måde får man 5-chlor-benzthiazol-2-ylthio-ravsyre, som smelter ved 168-173°C (under sønderdeling).
5 Elementæranalyse beregnet 41,58% C 2,53% H 4,40% N
CllH8ClN04S2 fundet 41,78% C 2,63% H 5,68% N
Analogt med den ovenfor beskrevne fremgangsmåde fremstilles følgende forbindelser: 6-Nitrobenzthiazol-2-ylthio-ravsyre, smp. 115-118°c (søn-10 derdeling)
Analyse (cnHgN2°6S2^ beregnet 40,20% C 2,46% H 8,54% N
fundet 40,44% C 2,65% H 8,82% N
6-Ethoxybenzthiazol-2-ylthio-ravsyre, smp. 168-170°C
Analyse (ci3H23N05S2^ bere9net 47,72% C 4,16% H 4,44% N
15 fundet 47,40% C 4,15% H 4,15% N
6-Aminobenzthiazol-2-ylthio-ravsyre, smp. 115°C (sønderdeling)
Analyse beregnet 44,28% C 3,38% H 9,39% N
fundet 44,01% C 3,59% H 9,31% N
Eksempel 3 20 4,06 g 2-brom-3,3-dimethylravsyreanhydrid og 2,12 g Na2CC>2 omrøres i 1 time i 50 ml vand ved en temperatur på 60°C.
Den dannede opløsning afkøles til stuetemperatur og sættes dråbevis til en opløsning af 3,67 g 2-mercaptobenzthiazol og 8 g NaOH i 50 ml vand. Efter endt tilsætning opvarmes-25 reaktionsblandingen i 2 timer til 80°C. Efter afkøling tilsættes koncentreret saltsyre til en pH-værdi på 1, og det udfældede produkt frafiltreres. Til rensning af produktet opløses det i natriumcarbonatopløsning, hvorpå der fældes med HC1. På denne måde får man 2-(benzthiazol-2-30 ylthio)-3,3-dimethylravsyre (=1-(benzthiazol-2-ylthio)-2-
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18 methylpropan-1,2-dicarboxylsyre) med smp. 176-178°C.
Eksempel 4 I 40 ml 70%'s svovlsyre suspenderes 16,8 g finpulveriseret 2-mercaptobenzthiazol, og der tilsættes 10,3 g pulveri-5 seret maleinsyreanhydrid i løbet af 1 time under omrøring ved 48-51°C. Efter yderligere 1 time ved 50°C afkøles reaktionsblandingen til stuetemperatur, hvorefter den fortyndes ved dråbevis tilsætning af 250 ml vand ved 25-35°C.
Efter 1 times forløb fråfiltreres det udfældede produkt, 10 som opløses i fortyndet natriumhydroxidopløsning. Opløsningen filtreres og syrnes med saltsyre. Bundfaldet fra-filtreres og tørres i vakuum ved 60°C. På denne måde får man 24,7 g (87% af det teoretiske) benzthiazol-2-ylthio-ravsyre, som smelter ved 175-176°C under sønderdeling.
15 Analyse (C^HgNO^) beregnet 46,64% C 3,18%.B 4.,94% N 22,61% S
fundet 46,6% C 3,4% H 5,0% N 22,5% S
Der gås frem på samme måde som beskrevet ovenfor, idet man dog anvender 12,1 g maleinsyre i stedet for anhydridet, hvorved man får 22,6 g (80% af det teoretiske) af benz-20 thiazolyl-thioravsyre.
Der gås frem på samme måde som beskrevet ovenfor, idet der dog anvendes 12,1 g fumarsyre, en reaktionstid på 12 timer og en reaktionstemperatur på 40°C, og man får 21,1 g (75% af det teoretiske) benzthiazolylthioravsyre. 1 2 3 4 5 6
Eksempel 5 2 8,6 g 6-chlor-2-mercapto-4-methylbenzthiazol omsættes 3 analogt med den i eksempel 5 beskrevne fremgangsmåde 4 med 4,4 g maleinsyreanhydrid i 70%'s svovlsyre ved 47-50°C.
5 Råproduktet renses ved omfældning fra natriumhydrogen- 6 carbonatopløsning. Man får 6-chlor-4-methylbenzthiazol-2-ylthioravsyre, som smelter ved 168-171°C under sønderdeling.
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19
Analyse (C^2HioC^N04S2^
beregnet 43,44% C 3,04% H 4,22% N fundet 43,48% C 3,20% H 4,17% N
Analogt med den ovenfor beskrevne fremgangsmåde omsættes 5 20 g 5-carboxy-2-mercaptobenzthiazol og 10,26 g malein- syreanhydrid til dannelse af 5-carboxybenzthiazol-2-ylthioravsyre, som smelter ved 210-215°C under sønderdeling.
Analyse (ci2H9N06S2^
beregnet 44,04% C 2,78% H 4,28% N 10 fundet 43,9% C 2,78% H 4,39% N
Eksempel 6 I 50 ml 70%'s svovlsyre suspenderes 16,8 g pulveriseret 2-mercaptobenzthiazol, og i løbet af 30 minutter indrøres 13,7 g itaconsyre ved 40-44°C i suspensionen. Efter yder-15 ligere 1,5 timer ved 40-44°C afkøles reaktionsblandingen til stuetemperatur og fortyndes med vand, idet man opretholder en temperatur under 35°C. Den udfældede 3-(benz-thiazol-2-ylthio)-propan-1,2-dicarboxylsyre frafiltreres, vaskes med koldt vand og tørres ved 60°C i vakuum. Udbytte: 27,5 g (92% af det teoretiske), smp. 160-166°C.
20 Analyse (C12Hi;lN04S2)
beregnet 48,48% C 3,73% H 4,71% N 21,57% S fundet 48,2% C 3,7% H 4,6% N 21,3% S
Analogt med den ovenfor beskrevne fremgangsmåde omsættes 84.2 g 6-nitro-2-mercaptobenzthiazol og 52,4 g itaconsyre 25 til dannelse af 3-(6-nitrobenzthiazol-2-ylthio)-propan- 1, 2-dicarboxylsyre, som smelter ved 190-198°C under sønderdeling .
Eksempel 7 I 150 ml 75%'s svovlsyre opløses 20,9 g 2-methylenglutar-30 syre under omrøring ved 50°C, og der tilsættes langsomt 24.2 g 2-mercaptobenzthiazol. Reaktionen er exoterm og
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temperaturen stiger til 60°C. Derpå omrøres reaktionsblandingen i 2 timer ved 55°C.. Den dannede brune opløsning hældes i 500 ml vand, og der omrøres i 1 time.
Derpå tilsættes 600 ml vand, og det hvide bundfald fra-5 filtreres. Efter omkrystallisation fra vandig methanol får man 4-(benzthiazol-2-ylthio)-butan-l,3-dicarboxylsyre, som smelter ved 152-154°C.
Analyse ^13^13^4^2^
beregnet 50,14% C 4,21% H 4,50% N 10 fundet 50,39% C 4,35% H 4,36% N
Eksempel 8 I 50 ml 70%*s svovlsyre suspenderes 16,8 g 2-mercaptobenz-thiazol, og der tilsættes 13,7 g glutaconsyre i løbet af 30 minutter under omrøring ved 45-50°C. Reaktionsblandingen 15 omrøres i yderligere 1,5 timer ved 45-50°C, og produktet isoleres under anvendelse af den i eksempel 5 beskrevne fremgangsmåde. Man får 26 g (88% af det teoretiske) 3-(benz-thiazol-2-ylthio)-glutarsyre, som smelter ved 153-154°C.
Analyse (ci2HnN04S2)
20 beregnet 48,48% C 3,71% H 4,71% N 21,57% S
fundet 48,5% C 3,8% H 4,8% N 21,2% S
Eksempel 9 4,45 g 2-mercaptorbenzthiazol og 5 g but-3-en-l,2,3-tri-carboxylsyre rives sammen i en morter. Den pulverformige 25 blanding sættes portionsvis under omrøring til 60 ml 70%'s svovlsyre ved 48-50°C i løbet af 1 time. Efter yderligere 3 timer ved 48-50°C afkøles reaktionsblandingen til stuetemperatur, hvorpå den fortyndes under omrøring med 250 ml vand ved 25-30°C. Den vandige opløsning dekan-30 teres fra et klæbrigt bundfald, hvorpå der fortyndes med yderligere 200 ml vand. Efter omrøring i 1 time frafil-treres bundfaldet og tørres. Den dannede 4-(benzthiazol-2-ylthio)-butan-l,2,3-tricarboxylsyre smelter efter omkrystallisation fra methanol/vand ved 188-190°C. 1
Analyse (C-L3H14NOgS2)
beregnet 47,32% C 3,69% H 3,74% N fundet 47,40% C 3,86% H 3,89% N
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Eksempel 10 8.56 g benzthiazol-2-ylthioravsyre opløses i 60 ml 1 N natriumhydroxidopløsning under omrøring. Der tilsættes dråbevis en opløsning af 3,33 g calciumchlorid i lidt vand.
5 Det dannede bundfald af calcium-benzthiazol-2-ylthiosuccinat frafiltreres og vaskes med lidt koldt vand, hvorefter det tørres i vakuum ved en temperatur på 100°C.
Analyse (cnH7CaN04S2) beregnet 41,12% C 2,20% H 4,36% N 12,47% Ca fundet 40,69% C 2,36% H 4,23% N 12,40% Ca 10 Analogt med den ovenfor beskrevne fremgangsmåde omsættes 8.56 g benzthiazol-2-ylravsyre i 100 ml methanol med 6,58 g zinkacetat i 70 ml methanol til dannelse af det tilsvarende zinksalt, der udfældes som monohydrat.
Analyse (C^^HyN0^S2Zn.H20)
15 beregnet 36,23% C 2,49% H 3,84% N 17,56% S
fundet 36,54% C 2,46% H 3,79% N 17,68% S
Eksempel 11
En opløsning af 8,26 g mercaptoravsyre i 50 ml 10%'s natrium-carbonatopløsning sættes dråbevis til en opløsning af 8,48 g 20 2- chlorbenzthiazol i 50 ml dioxan under omrøring. Efter endt tilsætning omrøres reaktionsblandingen i 4 timer ved 85°C, hvorpå den afkøles.
Derefter tilsættes en opløsning af 4 g natriumhydroxid i 20 ml vand, og reaktionsblandingen omrøres yderligere 5 ti-25 mer ved 85°C. Efter afkøling syrnes opløsningen med koncentreret saltsyre og ekstraheres med 3 x 30 ml ethylacetat.
De sammenblandede ekstrakter tørres over natriumsulfat og inddampes. Den faste remanens vaskes med hexan-diethyl-ether 1:1 og optages i en natriumhydrogencarbonatopløsning.
30 Opløsningen filtreres til fjernelse af uopløste bestanddele, vaskes med chloroform og syrnes med saltsyre. Det udfældede produkt ekstraheres med ethylacetat. Ved ind-dampning af ethylacetatopløsningen fås et produkt, som omkrystalliseres fra vand, og på denne måde får man 35 benzthiazol-2-ylthioravsyre, som er identisk med den ifølge eksempel 1 fremstillede forbindelse.
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Eksempel 12
En opløsning af 15,0 g 6-nitrobenzthiazol-2-ylthioravsyre (fremstillet som beskrevet i eksempel 2) i 70 ml vandig ammoniak (vægtfylde 0,95) mættes under afkøling med et 5 isbad ved 25-30°C med hydrogensulfid. Den dybrøde opløsning opvarmes i løbet af 1 time til 90°C og holdes i 1 time ved denne temperatur. Den dannede suspension afkøles og indstilles på pH-værdien 5 med eddikesyre, idet man ved afkøling holder temperaturen under 35°C, 10 Bundfaldet frafiltreres hurtigt og vaskes med lidt vand. Filtratet omrøres i flere timer ved stuetemperatur, hvorved produktet langsomt udkrystalliserer. Krystallerne frafiltreres og omkrystalliseres fra methanol. På denne måde får man 6-aminobenzthiazol-2ylthio-ravsyre med smp. 117°C, 15 som er identisk med forbindelsen fremstillet ifølge eksempel 2.
Analogt med den ovenfor beskrevne fremgangsmåde fremstilles ved reduktion af 3-(6-nitrobenzthiazol-2-ylthio)-propan-1, 2-dicarboxylsyre (fremstillet som beskrevet i eksempel 6) 20 3-(6-aminobenzthiazol-2-ylthio)-propan-1,2-dicarboxylsyre, som smelter ved 182-185°C under sønderdeling.
Analyse (C^2H^2N2°4S2^
beregnet 46,15% C 3,88% H 8,97% N
fundet 46,38% C 4,23% H 9,01% N 1 2 3 4 5 6
Eksempel 13 2
De omhandlede forbindelsers korrosionsinhiberende virkning 3 illustreres i det følgende ved hjælp af en test med beluf 4 tet vand. Til denne test anvendes vand med standardiseret 5 korrosivitet, som er fremstillet ved opløsning af 20 g 6
CaS04.2H20, 15 g MgS04.7H20, 4,6 g NaHCC>3 og 7,7 g CaCl2.6H20 i 166 1 (45 gal) destilleret vand. Stålplader (af blødt fluss-stål) på 5 x 2,5 cm skures med pimpstenspulver, ned-dyppes i saltsyre i 1 minut, skylles, tørres og vejes.
10 mg korrosionsinhibitor opløses i 100 ml af det ovenfor
DK 162224 B
23 fremstillede standardvand, hvilket svarer til en koncentration på 100 ppm. Pladen ophænges i opløsningen, og beholderen holdes på en temperatur på 40°C. Gennem opløsningen ledes luft i en mængde på 500 ml pr. minut. Det vand, 5 som fordamper derved, erstattes kontinuerligt med destilleret vand, således at væskeoverfladen i beholderen har konstant højde.
Efter 48 timer udtages pladen, skures med pimpsten, neddyp-pes i saltsyre i 1 minut og inhiberes ved tilsætning af 10 1% hexamethylentetramin, hvorpå den skylles, tørres og ve jes. En blindprøve uden korrosionsinhibitor underkastes samme test. Korrosionshastigheden (KG) beregnes ud fra vægt- 2 tabet i mg pr. dm metaloverflade pr. dag. Den procentvise korrosionsinhibering fås ud fra forskellen mellem blind-15 prøve og prøve ifølge formlen KG blindprøve-KG prøve
Procentvis korrosionsinhibering = - x 100 KG blindprøve
Resultaterne er anført i den efterfølgende tabel 1.
24
Tabel 1
DK 162224 B
Korrosionsinhibitor Procentvis korrosiqns- __(100 ppm) inhibering______
• N
/Y\ I II •-SCHCH-COOH 100
• · / I
\/\/ COOH
• S
• N i /Y\ I || »-SCHCH^COOH 99 • · / i 2
/\/\/ COOH
C2H5° * S___
Cl · N
YY\ [ (I *-SCHCH COOH 100 • * / Ϊ
\/\/ C00H
• S
• N
/Y\ 5 I II »-SCHCH.C00H 89
• · / I
/ \ / \ / COOH
°2N * S___
Eksempel 14
Virkningen af korrosionsinhibitorerne med formlen I i metalbearbejdningsvæsker kan demonstreres ved hjælp af metode IP 287 fra Institute of Petroleum. Til dette formål indstil-10 les 1%'s opløsning af korrosionsinhibitoren i vand, som inde-
DK 162224 B
25 holder 68 mg CaC^.GHgO og 132 mg MgSO^.TE^O pr. liter, på en pH-værdi på 8,5 ved tilsætning af triethanolamin.
Bunden af en petriskål med en diameter på 90 mm dækkes med filtrerpapir, som på et område på 35 x 35 mm belæg-5 ges med tyndt lag støbejernsdrejespåner (som fremstilles ifølge metode IP 287). 2 ml af inhibitoropløsningen anbringes på drejespånerne ved hjælp af en pipette, låget sættes på petriskålen, som henstår i 2 timer ved stuetemperatur. Derefter udtages filtrerpapiret, spånerne bort-10 skylles med vand, og rustbilledet på filtrerpapiret bedømmes. Der anvendes følgende bedømmelsesskala: 0 ingen rustpletter 1 1-3 pletter med en diameter mindre end 1 mm 2 op til 1% af arealet er dækket af pletter 15 3 op til 5% af arealet er dækket af pletter 4 >5% af arealet er dækket af pletter.
Testen gennemføres også med en 0,5%'s inhibitoropløsning. Resultaterne er anført i den efterfølgende tabel 2.
Tabel 2 26
DK 162224B
Rustbillede ved en
Korrosions inhibitoren koncentration på 1% Ό,.5%
• N
/V\ I ·-S-CH-CH„COOH 0 3 1 / i 2
\/\/ COOH
• S
• N
/V\ I ·-S -CH -CH-CH COOH 0 3 • · / 2 | 2
\ / \ / COOH
• S
• N
/v\ 5 I II »-S-CH--CH-CH -CH.COOH 0 0 -11/ 2 i 22
\ / \ / COOH
• S
/V\ COOH
I || —S-CH -CH-CH-CH.COOH O O
/ 2 i 2
\ / \ / COOH
• S
uden inhibitor ^ ^
Ved visuel bedømmelse af 1%'s opløsningerne af de i tabellen anførte forbindelser viser det sig, at der i løbet af 10 1 dag ikke konstateres nogen fældninger eller uklarheder.
Dette viser, at forbindelserne ikke er følsomme overfor hårdt vand.
Eksempel 15
En grunder af en aromatisk epoxyharpiks, rødt jernoxid, 15 talkum og en polyaminoamid-hærder sprøjtes på sandblæste stålplader og hærdes i 1 uge ved stuetemperatur. Derefter
DK 162224B
27 påføres en hvid dæklak af en tokomponent-polyurethan, som ligeledes hærdes i 1 uge. Grunderen indeholder den i tabel 3 anførte korrosionsinhibitor. I de lakerede prøver skæres ved hjælp af en Sikkens-kniv type 463 et X-formet snit, 5 som går ind til metallet. Derefter underkastes pladerne en saltsprøjtetest ifølge ASTM B 117 i et tidsrum på 1000 timer. Resultaterne er anført i tabel 3.
Tabel 3
Korrosionsinhibitor Blæredannelse Underrust 10 ingen stærk stærk 3% forbindelse 1 lidt lidt 6% forbindelse 1 ingen ingen
Forbindelse 1 = benzthiazol-2-ylthioravsyre.
Eksempel 16 15 En alkydharpikslak fremstilles af følgende bestanddele: 40 dele "Alphthalat"® AM 380 (60%’s xylenopløsning) (alkydharpiks fra Raichold Albert Chemie AG)
4 dele jernoxidrødt 225 fra Bayer AG
17,4 dele talkum (mikroniseret) 20 13 dele mikroniseret calciumoarbonat ("Millicarb"®,
Plttss-Staufer AG) 0,3 dele "Luaktin"® (BASF) 0,6 dele 8%Ts cobaltnaphthenatopløsning 24,7 dele xylen/ethylglycol-blanding (6:40). 1
De i de efterfølgende tabeller 4 og 5 anførte korrosionsinhibitorer opløses i forvejen i en del af opløsningsmidlet og sættes til lakken. Lakken formales i 7 dage med glasperler til opnåelse af en pigment- og fyldstofkornstørrelse på 15 μτα.
DK 162224B
28
Lakken sprøjtes på sandblæste stålplader (7 x 13 cm) i en lagtykkelse, der efter tørring udgør ca. 50 μτα. Efter tørring i 7 dage ved stuetemperatur efterhærdes prøve-5 emnerne i 3 timer ved 60°C.
I de hærdede lakoverflader skæres to krydsformede snit af en længde på 4 cm indtil metallet ved hjælp af et Bonder-krydsskæreapparat. Til beskyttelse af kanterne påføres disse et kantbeskyttelsesmiddel ("Icosit"® 255).
10 Derpå underkastes pladerne en saltsprøjtetest ifølge ASTM B 117 i et tidsrum på 600 timer. For hver 200 timer bedømmes belægningens tilstand, dvs. blæregraden (ifølge DIN 53 209) på krydsstedet og på de lakerede flader samt rustgraden (ifølge DIN 52 210) på alle fladerne.
15 Efter afslutning af denne del af forsøget fjernes malingen ved behandling med koncentreret natriumhydroxidopløsning, og der foretages bedømmelse af korrosionen af metallet på krydsstedet (ifølge DIN 53 167) samt på de resterende flader. Ved bedømmelsen anvendes en 6-trins- 20 skala. Summen af bedømmelsestallene for malingen og for metaloverfladerne giver korrosionsinhiberingsværdien KS.
Jo højere denne værdi er, desto kraftigere virkning har den afprøvede inhibitor.
Tabel 4
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29
Korrosions- Bedømmelse af Bedømmelse af KS
inhibitor_maling_metal_ 5 ingen 1,6 0,8 2,4
2% zinksalt af MBT
(EP-A-3817) 3,8 4,1 7,9
2% blysalt af MBT
(EP-A-3817) 3,7 4,8 8,5 10 - 2% zinksalt af BTBS 4,0 5,0 9,0 2% blysalt af BTBS 4,1 5,3 9,4 MBT = 2-Mercaptobenztriazol 15 BTBS = Benzthiazolylthioravsyre
A CHa-cooH
/N/\ I
I li — S-CH-C00H
W
30
DK 162224B
Tabel 5
Korrosionsinhibitor Bedømmelse Bedømmelse KS
af maling af metal
Ingen 0.6 2,4 /\/\
2 % l II S-CHzCOOH
A 'l 1,4 0,6 2,0 (CH-A-458048) .A/\ 2 % I II y-s-ch2ch2cooh
Vy 1,6 0,6 2,2 (CH-A-458048)
• N
S V \
2 7o \ II . * —S—CH—C00H
• · / I
AV i«,H9 3,4 2,7 6,1 (GB-A-1028924)___
/\A ?H2_C00H
2 % i ίί S-CH-COOH
A V 5,4 4,8 10,2
y\A fzC00H
2 % ί II S-CHz-CH-COOH
AV 4,8 5,3 10,1
Det fremgår af de ovenfor opnåede resultater, at alle de testede benzthiazoler er gode korrosionsinhibitorer, 5 medens benzimidazolerne er uden virkning ved de anvendte forsøgsbetingelser. Blandt benzthiazolderivaterne er forbindelserne ifølge opfindelsen de mest virksomme korrosionsinhibitorer .
Claims (12)
1. Benzthiazol-2-ylthiopolycarboxylsyrer, kendeteg net ved, at de har den almene formel R R · N 19 , yv\ ; -
5 C-S-(- C-)-CH (i) / i Ilt ' * /W i· !* R · S R hvori substituenterne R hver for sig betyder hydrogen, cl-Ci2-alkyl, Ci~Ci2“alkoxy, Ci-C4-halogenalkyl, Ci~Ci2“ alkylthio, Ci-ci2-alkylsulfonyl, phenyl, C7-Ci6-alkylphe-nyl, C7-Ci5~phenylalkyl, Cg-Cg-cycloalkyl, halogen, -NO2,
10 -CN, -C00H, -C00(C!-C4-alkyl), -OH eller en primær, sekundær eller tertiær amino- eller carbamoylgruppe med højst 20 carbonatomer, n er 0 eller 1, og, når n er 1, Ri, R2, r3 og R4 hver for sig betyder H, C^-Cig-alkyl, C]_-C4-hydroxyalkyl, C2“Ci2-carboxyalkyl, Ci~C4-halogen-15 alkyl, C2“Cio-alkoxyalkyl, -C00H, phenyl eller benzyl, eller R^ og R2 eller R1 og R^ sammen betyder uforgrenet eller forgrenet Cg-Cg-alkylen, som kan være substitueret med 1 eller 2 carbonylgrupper, eller R1 og R2 sammen betyder en direkte binding, og, når n er 0, R2 og R4 20 betyder carboxyl eller med 1 eller 2 carboxylgrupper substitueret phenyl, idet dog gruppen med formlen R1 R2 ! I -(—C—)-CH l3n U R R indeholder mindst to og højst fire carboxylgrupper, samt baseadditionssalte deraf. DK 162224 B
2. Forbindelser ifølge krav 1, kendetegnet ved, at én af substituenterne R betyder hydrogen, C^-C^alkyl, Ci-C4~alkoxy eler amino, og de øvrige tre substituenter R 5 betyder hydrogen.
3. Forbindelser ifølge krav 2, kendetegnet ved, at alle fire substituenter R betyder hydrogen.
4. Forbindelser ifølge krav 1, kendetegnet ved, at to af grupperne R^·, R^, r3 og R^ betyder carboxyl- eller 10 carboxyalkylgrupper.
5. Forbindelser ifølge krav 1, kendetegnet ved, at n er 1, og R^, R^, r3 og R^ hver for sig betyder H, Ci-Ci2~alkyl, C1-C4-hydroxyalkyl, C2-Cg-carboxyalkyl, C2-Cio-alkoxyalkyl, carboxyl, phenyl eller benzyl, eller
15 R1 og r2 sammen betyder trimethylen eller tetramethylen.
6. Salte af forbindelser med formlen 1 ifølge krav 1, kendetegnet ved, at de er salte af et alkalimetal, jordalkalimetal, et metal fra gruppe IIB, IIIA eller VIII i det periodiske system, af ammoniak eller af organiske 20 aminer.
7. Fremgangsmåde til fremstilling af forbindelser med formlen I ifølge krav 1, kendetegnet ved, at man omsætter en forbindelse med formlen R R · N YY\ I II C-A (li) Λ Λ / R · S R 25 hvori R har den i krav 1 angivne betydning, og A betyder en fraspaltningsgruppe, med en forbindelse med formlen DK 162224 B R1 R2 I I m-s-{-c-4jj—ch (in) I 3 1 4 R3 R4 hvori n, Ri, r2, r3 Qg r4 har de i krav 1 angivne betydninger, og M betyder hydrogen eller en kation, eller 5 omsætter en forbindelse med formlen R R · N vv\ I II C-S-M (IV) aa/ R · X ! R hvori R har den i krav 1 angivne betydning, og M betyder hydrogen eller en kation, med en forbindelse med formlen r1 ?2 i 1 A-(-0-+5-CH (V) L 14 R3 R 10 hvori R^, R^, R3, r4 0g n ftar (je i krav 1 angivne betydninger, og A betyder en fraspaltningsgruppe.
8. Fremgangsmåde til korrosionsinhibering af vandige systemer, som er i kontakt med metal, kendetegnet ved, at systemet tilsættes mindst én forbindelse ifølge 15 krav 1. 1 Anvendelse af forbindelser ifølge krav 1 som korrosionsinbibitorer til vandige systemer. DK 162224 B
10. Vandigt system, kendetegnet ved, at det som korrosionsinhibitor indeholder mindst én forbindelse ifølge krav 1 i en mængde på 0,1 ppm til 5 vægt-%, 5 beregnet på det vandige system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB838313322A GB8313322D0 (en) | 1983-05-14 | 1983-05-14 | Heterocyclic-(cyclo)aliphatic carboxylic acids |
| GB8313322 | 1983-05-14 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| DK235384D0 DK235384D0 (da) | 1984-05-11 |
| DK235384A DK235384A (da) | 1984-11-15 |
| DK162224B true DK162224B (da) | 1991-09-30 |
| DK162224C DK162224C (da) | 1992-03-02 |
Family
ID=10542741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK235384A DK162224C (da) | 1983-05-14 | 1984-05-11 | Benzthiazol-2-ylthiopolycarboxylsyrer samt baseadditionssalte deraf, fremgangsmaade til fremstilling af disse forbindelser, fremgangsmaade til korrosionsinhibering af vandige systemer under anvendelse af disse forbindelser, anvendelse af forbindelserne som korrosionsinhibitorer samt vandige systemer indeholdende forbindelserne som korrosionsinhibitorer |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5152929A (da) |
| EP (1) | EP0129506B1 (da) |
| JP (1) | JPS59212478A (da) |
| AU (1) | AU563813B2 (da) |
| CA (1) | CA1225404A (da) |
| DE (1) | DE3484213D1 (da) |
| DK (1) | DK162224C (da) |
| GB (1) | GB8313322D0 (da) |
| ZA (1) | ZA843574B (da) |
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| GB8412065D0 (en) * | 1984-05-11 | 1984-06-20 | Ciba Geigy Ag | Preparation of carboxylic acid derivatives |
| GB8412064D0 (en) * | 1984-05-11 | 1984-06-20 | Ciba Geigy Ag | Compositions containing heterocyclic corrosion inhibitors |
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| CN109734671B (zh) * | 2015-12-22 | 2021-03-09 | 北京医药集团有限责任公司 | 苯并咪唑类衍生物、其制备方法和应用 |
| CN114133361B (zh) * | 2021-11-13 | 2023-07-14 | 一汽解放汽车有限公司 | 苯并噻唑衍生物及其制备方法、缓蚀剂及冷却液 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1028924A (en) * | 1962-03-13 | 1966-05-11 | Castrol Ltd | Lubricating compositions containing heterocyclic thio-ethers of saturated carboxylic acids |
| CH458048A (de) * | 1965-08-17 | 1968-06-15 | Sandoz Ag | Verfahren zur Herstellung von optisch aufgehelltem Papier |
| US4329381A (en) * | 1978-02-23 | 1982-05-11 | Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) | Method for providing corrosion resistance to metal objects |
| DE3216416A1 (de) * | 1982-05-03 | 1983-11-03 | Bayer Ag, 5090 Leverkusen | Heteroarylthiovinyl-verbindungen, ein verfahren zu ihrer herstellung und ihre verwendung als schaedlingsbekaempfungsmittel |
| GB8313320D0 (en) * | 1983-05-14 | 1983-06-22 | Ciba Geigy Ag | Coating compositions |
| GB8313321D0 (en) * | 1983-05-14 | 1983-06-22 | Ciba Geigy Ag | Preparation of mercaptan substituted carboxylic acids |
| DE3341633A1 (de) * | 1983-11-17 | 1985-05-30 | Sanshin Kagaku Kogyo Co., Ltd., Yanai, Yamaguchi | Rosthemmende substanz |
| GB8412064D0 (en) * | 1984-05-11 | 1984-06-20 | Ciba Geigy Ag | Compositions containing heterocyclic corrosion inhibitors |
| GB8412065D0 (en) * | 1984-05-11 | 1984-06-20 | Ciba Geigy Ag | Preparation of carboxylic acid derivatives |
| GB8412063D0 (en) * | 1984-05-11 | 1984-06-20 | Ciba Geigy Ag | Compositions containing heterocyclic corrosion inhibitors |
-
1983
- 1983-05-14 GB GB838313322A patent/GB8313322D0/en active Pending
-
1984
- 1984-05-08 DE DE8484810217T patent/DE3484213D1/de not_active Expired - Lifetime
- 1984-05-08 EP EP84810217A patent/EP0129506B1/de not_active Expired - Lifetime
- 1984-05-11 ZA ZA843574A patent/ZA843574B/xx unknown
- 1984-05-11 AU AU27944/84A patent/AU563813B2/en not_active Expired
- 1984-05-11 CA CA000454094A patent/CA1225404A/en not_active Expired
- 1984-05-11 DK DK235384A patent/DK162224C/da not_active IP Right Cessation
- 1984-05-14 JP JP59094774A patent/JPS59212478A/ja active Granted
-
1990
- 1990-10-10 US US07/595,155 patent/US5152929A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DK235384D0 (da) | 1984-05-11 |
| ZA843574B (en) | 1984-12-24 |
| JPS59212478A (ja) | 1984-12-01 |
| CA1225404A (en) | 1987-08-11 |
| US5152929A (en) | 1992-10-06 |
| DK162224C (da) | 1992-03-02 |
| AU2794484A (en) | 1984-11-15 |
| JPH0425954B2 (da) | 1992-05-06 |
| DE3484213D1 (en) | 1991-04-11 |
| EP0129506B1 (de) | 1991-03-06 |
| AU563813B2 (en) | 1987-07-23 |
| GB8313322D0 (en) | 1983-06-22 |
| EP0129506A3 (en) | 1987-04-15 |
| EP0129506A2 (de) | 1984-12-27 |
| DK235384A (da) | 1984-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUP | Patent expired |