EP3850072A1 - Silberschutzmittel - Google Patents
SilberschutzmittelInfo
- Publication number
- EP3850072A1 EP3850072A1 EP19766024.4A EP19766024A EP3850072A1 EP 3850072 A1 EP3850072 A1 EP 3850072A1 EP 19766024 A EP19766024 A EP 19766024A EP 3850072 A1 EP3850072 A1 EP 3850072A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- salt
- acid
- silver
- detergent
- degradable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 74
- 239000004332 silver Substances 0.000 title claims abstract description 74
- 239000011814 protection agent Substances 0.000 title claims abstract description 26
- 150000003839 salts Chemical class 0.000 claims abstract description 33
- CIEZZGWIJBXOTE-UHFFFAOYSA-N 2-[bis(carboxymethyl)amino]propanoic acid Chemical compound OC(=O)C(C)N(CC(O)=O)CC(O)=O CIEZZGWIJBXOTE-UHFFFAOYSA-N 0.000 claims abstract description 28
- KKMOSYLWYLMHAL-UHFFFAOYSA-N 2-bromo-6-nitroaniline Chemical compound NC1=C(Br)C=CC=C1[N+]([O-])=O KKMOSYLWYLMHAL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 150000007942 carboxylates Chemical class 0.000 claims abstract description 15
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims abstract description 7
- 239000003599 detergent Substances 0.000 claims description 53
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims description 25
- PQHYOGIRXOKOEJ-UHFFFAOYSA-N 2-(1,2-dicarboxyethylamino)butanedioic acid Chemical compound OC(=O)CC(C(O)=O)NC(C(O)=O)CC(O)=O PQHYOGIRXOKOEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000003223 protective agent Substances 0.000 claims description 11
- 150000001447 alkali salts Chemical class 0.000 claims description 10
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 7
- 108010064470 polyaspartate Proteins 0.000 claims description 7
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 claims description 5
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 4
- 229960004585 etidronic acid Drugs 0.000 claims description 4
- SZHQPBJEOCHCKM-UHFFFAOYSA-N 2-phosphonobutane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(P(O)(O)=O)(C(O)=O)CC(O)=O SZHQPBJEOCHCKM-UHFFFAOYSA-N 0.000 claims description 3
- 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 claims description 3
- 229940090960 diethylenetriamine pentamethylene phosphonic acid Drugs 0.000 claims description 3
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 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 claims description 3
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 239000010452 phosphate Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 9
- 239000003795 chemical substances by application Substances 0.000 abstract description 8
- 238000004851 dishwashing Methods 0.000 description 30
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 14
- 239000012964 benzotriazole Substances 0.000 description 14
- 238000002845 discoloration Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000007844 bleaching agent Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- DCEMCPAKSGRHCN-UHFFFAOYSA-N oxirane-2,3-dicarboxylic acid Chemical compound OC(=O)C1OC1C(O)=O DCEMCPAKSGRHCN-UHFFFAOYSA-N 0.000 description 2
- 229910001923 silver oxide Inorganic materials 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- JSYPRLVDJYQMAI-ODZAUARKSA-N (z)-but-2-enedioic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)\C=C/C(O)=O JSYPRLVDJYQMAI-ODZAUARKSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- 241000234282 Allium Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical class [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001622 bismuth compounds Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 231100000317 environmental toxin Toxicity 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003966 growth inhibitor Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical class [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005494 tarnishing Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/0073—Anticorrosion compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2075—Carboxylic acids-salts thereof
- C11D3/2086—Hydroxy carboxylic acids-salts thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/36—Organic compounds containing phosphorus
- C11D3/361—Phosphonates, phosphinates or phosphonites
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
- C11D3/3761—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in solid compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/265—Carboxylic acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3245—Aminoacids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/36—Organic compounds containing phosphorus
Definitions
- the field of the present invention is that of silver protection agents, preferably for detergents, in particular for dishwashing detergents, for protecting silver-containing products during a washing process.
- the silver-containing products can become discolored due to the contact of silver-containing products with sulfur-containing compounds that are present in eggs or onions, for example.
- the silver over the silver-containing products can come into contact with bleach during a washing process, as a result of which the silver is oxidized to dark gray silver oxide.
- EP 0 872 543 A2 discloses a detergent with a corrosion protection effect for silver, which has a metal-triazole complex and another triazole.
- WO 1997/003177 A1 also shows a dishwashing machine dishwashing detergent in the form of a tablet, which has a bleaching agent, a bleach activator and a silver and / or copper corrosion protection agent, the silver and / or copper corrosion protection agent not being present in one layer together with the Bleach and the bleach activator is included.
- a silver and / or copper anticorrosive agent is according to the
- WO 1997/003177 A1 provided, inter alia, benzotriazole.
- EP 0 906 407 B1 discloses a dishwashing detergent which contains methylglycinediacetic acid (MGDA) with a mass fraction of 10% and also works at a low pH. Ben zotriazole is also used as a silver and / or copper corrosion protection agent.
- MGDA methylglycinediacetic acid
- Benzotriazole is partially water-soluble, is drawn onto the surface of the silver-containing product in the course of the washing process and protects this surface from discoloration. What is disadvantageous, however, is that benzotriazole is an environmental toxin and is difficult is degradable. In this context, poorly degradable means slow to no decomposition into smaller molecules with the help of living beings or their enzymes. Benzotriazole is therefore only eliminated to a small extent in sewage treatment plants and reaches large quantities in rivers and lakes. Benzotriazole is classified with H-411 in the hazard and safety instructions of the globally harmonized system for the classification and labeling of chemicals (GHS), which means that benzotriazole is toxic for water organisms with long-term effects.
- GRS globally harmonized system for the classification and labeling of chemicals
- the silver protection agent is to be decomposed biologically by living beings or their enzymes and removed from the environment.
- the present invention provides a silver protection agent that is biodegradable and environmentally friendly.
- the silver protectant according to the present invention comprises bismuth citrate, a degradable carboxylate or a phosphonate, such as a salt of methylglycinediacetic acid (MGDA).
- the carboxylate can be a simple molecule or a polymer.
- the silver protection agent according to the invention protects silver-containing products from deposits and / or discoloration during a washing cycle. It can ver for cleaning
- the silver protective agent according to the invention dissolved in water alone or together with constituents of detergents, for example in dishwashing detergents or in machine dishwashing detergents, who used the.
- GB 2 311 535 A discloses detergents for reducing deposits which contain an aminotricarboxylic acid, for example MGDA. Among others, the described
- Detergents also contain crystal growth inhibitors, for example hydroxyethane diphosphonic acid.
- GB 2 297 096 A discloses a composition for dishwashing detergents with reduced tarnishing of silver and good washing performance, comprising an oxygen bleach and a water-soluble bismuth compound.
- MGDA is not mentioned as a possible component.
- the degradable carboxylate is a salt of polyepoxysuccinic acid (PESA), preferably an alkali salt of polyepoxysuccinic acid, in particular the disodium salt of polyepoxysuccinic acid.
- PESA polyepoxysuccinic acid
- the degradable carboxylate is a salt of polyepoxysuccinic acid (PESA), preferably an alkali salt of polyepoxysuccinic acid, in particular the disodium salt of polyepoxysuccinic acid.
- PESA is used as an environmentally friendly water treatment agent in cooling water systems to inhibit the formation of deposits.
- US 5,062,962 A and US 5,147,555 A disclose methods for controlling deposit formation in aqueous systems. Although the corrosion protection effect of metallic surfaces of heat exchangers is shown using PESA, neither a detergent nor a silver protection is described in US Pat. No. 5,062,962 or US Pat. No. 5,147,555 A.
- the US 4,654,159 A discloses PESA and the production of PESA as ether hydroxypolycarboxylate from epoxy succinic acid, the use as an ingredient in detergents for the substitution of phosphorus and nitrogen-containing ingredients is shown.
- the use of PESA as a silver protective agent or the combination of PESA with bismuth citrate or MGDA are not shown in US 4,654,159 A.
- the degradable car boxylate is a salt of iminodisuccinic acid (IDS), preferably an alkali salt of iminodisuccinic acid, in particular the tetranate rium salt of iminodisuccinic acid.
- IDS is a complexing agent and biodegradable.
- WO 2009/040544 A1 describes a detergent which can comprise, for example, a salt from MGDA and a salt from IDS as a building material, and which can also have bismuth for the anticorrosive action, but there is no indication of the use of bismuth.
- MGDA and IDS are elements of a list of components that can be considered as an ingredient and bismuth is an element of a further list of components that are suitable as corrosion inhibitors.
- the degradable carboxylate is a salt of polyaspartic acid (PASP). Advantages of the PASP are the good water solubility and the good degradability.
- the degradable carboxylate is a polymer or copolymer of itaconic acid.
- the phosphonate is a salt of hydroxyethane diphosphonic acid (HEDP), a salt of phosphonobutane tricarboxylic acid (PBTC), a salt of aminotrimethylenephosphonic acid (ATMP) or a salt of diethylenetriaminepentamethylenephosphonic acid (DTPMP).
- HEDP hydroxyethane diphosphonic acid
- PBTC phosphonobutane tricarboxylic acid
- ATMP aminotrimethylenephosphonic acid
- DTPMP diethylenetriaminepentamethylenephosphonic acid
- the salt of methylglycinediacetic acid is an alkali salt of methylglycinediacetic acid, in particular the trisodium salt of methylglycinediacetic acid.
- the present invention contemplates, instead of the salt of methylglycinediacetic acid, the use of a combination of a salt of polyepoxysuccinic acid, preferably an alkali salt of polyepoxysuccinic acid, in particular the disodium salt of polyepoxysuccinic acid, and an alkali salt of iminodisuccinic acid, in particular the tetranate salt Iminodisuccinic acid.
- this combination also protects silver-containing products during a washing process.
- the present invention relates to a detergent which comprises silver protection, the silver protection comprising bismuth citrate, a degradable carboxylate or a phosphonate, and a salt of methylglycinediacetic acid.
- the detergent according to the invention is preferably degradable and is particularly suitable for cleaning silver-containing products, in particular silver cutlery, since the silver of the silver-containing products is protected from deposits and / or discoloration and / or oxidation to silver oxide.
- the mass fraction of bismuth citrate is between 0.01% and 2.5%, preferably between 0.25% and 1%, in particular between 0.4% and 0.6% .
- the mass fraction of the degradable carboxylate or the phosphonate, based on the total mass of the detergent is between 0.01% and 20%, preferably between 0.1% and 10%, in particular between 0.5% and 5%, lies.
- the Mass fraction of the salt of methylglycinediacetic acid based on the total mass of the detergent between 0.01% and 35%, preferably between 5% and 15%, in particular between 7% and 15%.
- the detergent is a machine dishwashing detergent, wherein the machine dishwashing detergent can be in the form of a tab or a powder.
- the detergent has its full effect at low temperatures below 60 ° C.
- the detergent according to the invention is used in a dishwasher at temperatures below 60 ° C., preferably below 55 ° C., in particular below 50 ° C.
- dishwashing detergents GM 1 to GM 6 which comprise different silver protective agents, 6 tabs of 20 g each being pressed out of the dishwashing detergents GM 1 to GM.
- Table 1 shows the mass fractions of the constituents of the dishwashing detergents GM 1 to GM 6.
- the silver protection agents that are part of the dishwashing detergents GM 1 to GM 6 include benzotriazole, bismuth citrate, the sodium salt of the maleic acid-acrylic acid copolymer (MA-AA), the trisodium salt of methylglycinediacetic acid (MGDA), the disodium salt of polyepoxysuccinic acid (PESA) , the tetra sodium salt of iminodisuccinic acid (IDS) and / or a salt of polyaspartic acid (PASP).
- the remaining constituents of the dishwashing detergents GM 1 to GM 6 are known from the prior art, so that they are not explained in more detail.
- the silver protection agent of the dishwashing detergent GM 1 has benzotriazole and MA-AA with mass fractions of 0.3% and 4.45%.
- the use of benzotriazole is known from the prior art.
- the silver protective agent of the dishwashing detergent GM 2 contains bismuth citrate and MA-AA with a mass fraction of 0.5% and
- the tabs produced from the dishwashing detergents GM 1 to GM 6 were individually placed in a dishwasher loaded with silver cutlery and each carried out 30 washing cycles in a washing program with temperatures between 45 ° C. and 65 ° C. The coating and the discoloration of the silverware was then measured and evaluated using a numerical scale.
- the numerical scale has a sequence of numbers from 0 to 10, with 0 points representing a very high deposit and a high degree of discoloration and 10 points no significant deposit and no significant discoloration of the silver cutlery.
- the dishwashing detergent GM 4 has a further embodiment of the silver protection agent according to the invention, which comprises bismuth citrate, MGDA and PESA with mass fractions of 0.25%, 10.0% and 10.0%. After 30 wash cycles of the wash program, the formation of deposits on the dishwashing detergent GM 4 cleaned silver cutlery with 8 points.
- the dishwashing agent GM 4 according to the invention which comprises bismuth citrate, MGDA and PESA, a lower deposit and less discoloration of the treated silverware were found than when using the dishwashing agent GM 1, which has benzotriazole.
- the formation of deposits on the silver cutlery when treated with the dishwasher detergent GM 5 was rated 9 points.
- the further embodiment of the silver protection agent according to the invention used here has bismuth citrate, MGDA and IDS with mass fractions of 0.25%, 10.0% and 10.0%. Accordingly, the loading and the discoloration of the silver cutlery when using the silver protection agent of the dishwasher detergent GM 5 is significantly lower than when using the dishwasher detergent GM 1, which has benzotriazole.
- the dishwasher detergent GM 6 has a further embodiment of the silver protection agent according to the invention, the bismuth citrate, PESA, IDS and PASP with mass fractions of 0.5%,
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18193918.2A EP3623456A1 (de) | 2018-09-12 | 2018-09-12 | Silberschutzmittel |
PCT/EP2019/074292 WO2020053316A1 (de) | 2018-09-12 | 2019-09-12 | Silberschutzmittel |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3850072A1 true EP3850072A1 (de) | 2021-07-21 |
EP3850072B1 EP3850072B1 (de) | 2024-01-03 |
EP3850072C0 EP3850072C0 (de) | 2024-01-03 |
Family
ID=63578990
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18193918.2A Withdrawn EP3623456A1 (de) | 2018-09-12 | 2018-09-12 | Silberschutzmittel |
EP19766024.4A Active EP3850072B1 (de) | 2018-09-12 | 2019-09-12 | Silberschutzmittel |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18193918.2A Withdrawn EP3623456A1 (de) | 2018-09-12 | 2018-09-12 | Silberschutzmittel |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP3623456A1 (de) |
WO (1) | WO2020053316A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4269548A1 (de) | 2022-04-27 | 2023-11-01 | Dalli-Werke GmbH & Co. KG | Reinigungsmittelzusammensetzung mit kesselsteinhemmern |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB202005911D0 (en) * | 2020-04-23 | 2020-06-10 | Reckitt Benckiser Finish Bv | Composition |
WO2024088608A1 (en) * | 2022-10-27 | 2024-05-02 | Brenntag Holding Gmbh | Builder combination for liquid detergent compositions |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1586067A (en) * | 1976-10-28 | 1981-03-18 | Procter & Gamble | Detergent composition |
US4654159A (en) | 1985-06-24 | 1987-03-31 | The Procter & Gamble Company | Ether hydroxypolycarboxylate detergency builders |
US5062962A (en) | 1990-05-04 | 1991-11-05 | Betz Laboratories, Inc. | Methods of controlling scale formation in aqueous systems |
US5147555A (en) | 1990-05-04 | 1992-09-15 | Betz Laboratories, Inc. | Methods of controlling scale formation in aqueous systems |
GB2297096A (en) * | 1995-01-20 | 1996-07-24 | Procter & Gamble | Bleaching composition. |
EP0842257B1 (de) | 1995-07-13 | 2000-12-27 | Benckiser N.V. | Geschirrwaschmaschinenspülmittel in form einer tablette |
GB2311535A (en) * | 1996-03-29 | 1997-10-01 | Procter & Gamble | Detergent compositions |
WO1997049792A1 (de) | 1996-06-21 | 1997-12-31 | Benckiser N.V. | Mgda-haltige maschinengeschirrspülmittel niederer alkalität |
DE19716094A1 (de) | 1997-04-17 | 1998-10-22 | Henkel Kgaa | Spülmittel mit Korrosionsschutzwirkung |
GB0718944D0 (en) | 2007-09-28 | 2007-11-07 | Reckitt Benckiser Nv | Detergent composition |
-
2018
- 2018-09-12 EP EP18193918.2A patent/EP3623456A1/de not_active Withdrawn
-
2019
- 2019-09-12 WO PCT/EP2019/074292 patent/WO2020053316A1/de unknown
- 2019-09-12 EP EP19766024.4A patent/EP3850072B1/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4269548A1 (de) | 2022-04-27 | 2023-11-01 | Dalli-Werke GmbH & Co. KG | Reinigungsmittelzusammensetzung mit kesselsteinhemmern |
WO2023209024A1 (en) | 2022-04-27 | 2023-11-02 | Dalli-Werke Gmbh & Co. Kg | Detergent composition with antiscalants |
Also Published As
Publication number | Publication date |
---|---|
WO2020053316A1 (de) | 2020-03-19 |
EP3850072B1 (de) | 2024-01-03 |
EP3623456A1 (de) | 2020-03-18 |
EP3850072C0 (de) | 2024-01-03 |
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