Dishwashing detergent composition

Abstract

According to a first aspect of the present disclosure, there is provided a dishwashing detergent composition, preferably an automatic dishwashing detergent composition, wherein the detergent composition comprises at least a first glass corrosion inhibitor. The at least first glass corrosion inhibitor is a quaternized hydroxy-C1-C8-alkyl cellulose. According to a second aspect of the present disclosure there is provided the use of such a dishwashing detergent composition for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods. According to a third aspect of the present disclosure, there is provided the use of a quaternized hydroxy-C1-C8-alkyl cellulose as a glass corrosion inhibitor for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods.

Description

DISHWASHING DETERGENT COMPOSITIONFIELD OF THE INVENTION

[0001] The present disclosure relates to a dishwashing, preferably an automatic dishwashing, detergent composition. The present disclosure also relates to the use of a dishwashing, preferably an automatic dishwashing, detergent composition for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods. The present disclosure further relates to the use of a quaternized hydroxy-Ci-C8-alkyl cellulose as a glass corrosion inhibitor for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods.BACKGROUND

[0002] Glassware and glass baking dishes are some of the most frequently used items in the household, and as a result, some of the most often washed in the dishwasher. Unfortunately, sometimes the glass dishes don’t come out perfectly clean. The baked-on residue can be difficult for even the best dishwasher to fully remove. Over time, the high temperatures of repeated washing in the dishwasher can cause cloudy stains on fine stemware and everyday water glasses. If a consumer lives in a hard water area, deposits might slowly build up in the dishwasher. These mineral deposits, like limescale, can cling to glassware and dishes, causing a cloudy appearance.

[0003] However, even when a consumer lives in a soft water area, there is an issue with glass dishwashing goods. The soft water can corrode the glassware over time, and this damage is irreversible. Glass corrosion can also be caused by long dishwasher cycles, heat exposure and poor-quality glass. In short, the wear and tear of time will affect the glass surface of any glass dishwashing goods.

[0004] Therefore, the problem of glassware corrosion in automatic dishwasher processes is well recognised. It has been put forward that the problem of glassware corrosion is the result of two separate phenomena. Firstly, it is suggested that the corrosion is due to leakage of minerals from the glass network, accompanied by hydrolysis of the silicate network. Secondly, silicate material is suggested to be released from the glass. These phenomena can cause damage to glassware after a number of separate wash cycles. The damage may include cloudiness, scratches, streaks and other discoloration / detrimental effects.

[0005] Silicate materials have been suggested to be effective in preventing materials from being released by the glass composition. However, the use of silicate compounds can have detrimental side effects, such as the tendency to increase separation of silicate material at the glass surface.

[0006] A further solution has been to use zinc, either in metallic form or in the form of compounds. However, the use of soluble zinc compounds can give rise to detrimental side effects, such as the development of a precipitate of insoluble zinc compounds formed by interaction with other species typically present in the dishwasher wash liquor.

[0007] This has meant that often insoluble (or rather sparingly soluble) zinc compounds are preferred as the source of zinc in the dishwasher wash liquor. As these zinc compounds have only a low solubility in water it is usual that the compounds are required to have a relatively high surface area, achieved by having a small particle size, in order to attempt to achieve a sufficient concentration in water to obtain the required glass corrosion prevention effect.

[0008] However, the use of a small particle size has not been found to overcome the delivery issue and thus, with the use of these insoluble compounds, the problem of glass corrosion effects remains. The use of glasses and ceramics containing zinc has been found to address the problem of glassware corrosion in a dishwasher. The use of a ceramic I glass zinc containing composition overcomes the problems of poor solubility I precipitation described above whilst offering effective glassware protection.

[0009] However, there is still a problem associated with the ceramic I glass zinc containing compositions (and also with water soluble I insoluble zinc compounds) in that these compositions do not perform satisfactorily in the prevention of decorated glassware corrosion.

[0010] Glassware (and also other crockery such as plates) may be decorated with a glaze to apply a pattern or design to the glassware I crockery. The glaze typically comprises an admixture of materials, similar to the admixture used in glass preparation, usually further comprising a metal oxide (such as lead oxide) I other compound to give the glaze a colour.

[0011] The glaze is usually applied to the glass in a second annealing firing process, normally at a lower temperature than the glass firing process. It is recognised that the lower firing temperature provides the glaze with a lower resilience I higher sensitivity to, for example, dishwashing conditions.

[0012] The glaze of decorated glassware I crockery can still suffer from corrosion, even in the presence of a zinc compound. Glaze corrosion has the effect of removing a portion of the glaze from the glassware I crockery over a number of dishwasher cycles. The glaze removal has the effect that the applied patterns lose their shine and the pattern colours fade. As glazesare commonly used on premium glassware products, such as handmade items, consumers washing these products are wary of washing glazed items in a dishwasher. Glazed product manufacturers are also wary of recommending the use of automatic dishwashing for cleaning these products. This can mean that the consumer has no alternative but to wash such glazed glassware I crockery by hand.

[0013] Bismuth has been used as an additive to aid the prevention of corrosion of glazed glassware corrosion. However, the value of bismuth in this purpose has been diminished by the detrimental effects that the use of bismuth compound has on other components of the washing process. In this regard bismuth has been found to stain plastic materials. Bismuth also causes the formation of a brown stain on non-decorated glassware and cutlery. Also, although the glazed portion of the glassware may receive protection, bismuth has been found to stain the non-glazed portions. For these reasons the use of bismuth as a glaze protector has been avoided.

[0014] Therefore, up to now, there is still no ideal solution to provide glass corrosion protection of glass dishwashing goods and / or decor protection of glass and / or ceramic dishwashing goods. In view of the prior art, it was thus an object of the present invention to provide a dishwashing, preferably an automatic dishwashing, detergent composition, which shall not exhibit any glass corrosion or any other optical shortcoming, such as decor damages, of the respective glass dishwashing goods.SUMMARY OF THE INVENTION

[0015] According to a first aspect of the present disclosure, there is provided a dishwashing detergent composition, preferably an automatic dishwashing detergent composition, characterized in that the detergent composition comprises at least a first glass corrosion inhibitor. The at least first glass corrosion inhibitor is a quaternized hydroxy-Ci-C8-alkyl cellulose.

[0016] It is thus possible in an unforeseeable manner to provide a dishwashing, preferably an automatic dishwashing (ADW), detergent composition, which does not exhibit any glass corrosion or any other optical shortcoming of the respective glass dishwashing goods.

[0017] The present invention discloses a surprising technical advantage of quaternized hydroxy-Ci-C8-alkyl cellulose in a particular concentration window in dishwashing, preferably in automatic dishwashing (ADW), detergent compositions. The quaternized hydroxy-Ci-C8- alkyl cellulose described herein is demonstrated to show surprising glass corrosion protection. Preferably, the quaternized hydroxy-C1-C8-alkyl cellulose is a quaternized hydroxy-ethylcellulose or a quaternized hydroxy- propyl cellulose. More preferably, the quaternized hydroxy-C1-C8-alkyl cellulose is a hydroxypropyltrimonium hydroxy-ethyl cellulose or is hydroxypropyltrimonium hydroxy-propyl cellulose, even more preferably is hydroxypropyltrimonium hydroxy-ethyl cellulose.

[0018] In particular, the dishwashing detergent composition of the present invention ensures glass caring properties, especially glass corrosion properties, being at least comparable to the commonly used dishwashing detergent compositions comprising high amounts of other glass corrosion inhibitors. All compositions of present the invention may be produced by any suitable method of preparation as well known in the art.

[0019] According to a second aspect of the present disclosure there is provided the use of such a dishwashing detergent composition for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods.

[0020] According to a third aspect of the present disclosure, there is provided the use of a quaternized hydroxy-Ci-C8-alkyl cellulose as a glass corrosion inhibitor for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods. Preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose is a quaternized hydroxy-ethyl cellulose or a quaternized hydroxy-propyl cellulose. More preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose is a hydroxypropyltrimonium hydroxy-ethyl cellulose or is hydroxypropyltrimonium hydroxy- propyl cellulose, even more preferably is hydroxypropyltrimonium hydroxy-ethyl cellulose.DETAILED DESCRIPTION

[0021] The expressions “completely free”, “free of’, or similar expressions used herein mean that the composition or article comprises 0 wt. % of the stated component. That is, the component has not been intentionally added. However, it will be appreciated that such components may incidentally form thereafter, under some circumstances, or such component may be incidentally present, e.g., as an incidental contaminant.

[0022] The expressions “substantially free” or similar expressions as used herein means that the composition or article preferably comprises the stated component in an amount of less than 0.25 wt.%, preferably less than 0.2 wt.%, less than 0.1 wt.%, less than 0.05%, less than 0.01%, less than 0.005%, less than 0.001%, or less than 0.0001%. Preferably, the composition or article comprises 0 wt. % of the stated component, although it will be appreciated that very small concentrations may possibly be present, e.g., through incidental formation, contamination, or even by intentional addition. In some embodiments, thedishwashing detergent compositions described herein may be substantially free or completely free from any specific components not mentioned within this specification.

[0023] As used herein, the terms "wt. %", “% wt.”, “weight %”, and “% by weight” are synonyms to each other. All of these expressions are referring to a weight percentage of the respective component. Unless otherwise stated, all percentages, ratios, parts, and amounts used and described herein are by weight.

[0024] As used herein, the term “glass corrosion inhibitor” means a component which exhibits glass corrosion inhibiting properties e.g. aiding in the protection, preservation and / or maintenance of glass dishwashing goods. The term can be synonymous with other terms such as glass protecting agent and / or glass caring agent. The glass corrosion inhibitor defined herein has been specifically formulated for the protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods.

[0025] According to a first aspect of the present disclosure, there is provided a dishwashing detergent composition, preferably an automatic dishwashing detergent composition, characterized in that the detergent composition comprises at least a first glass corrosion inhibitor. The at least first glass corrosion inhibitor is a quaternized hydroxy-Ci-C8-alkyl cellulose.

[0026] The at least first glass corrosion inhibitor may be present in the detergent composition in an amount between 0.01 wt. % to 5 wt. % based on the total weight of the detergent composition. For example, the at least first glass corrosion inhibitor may be present in the detergent composition in an amount between 0.01 wt. % to 3 wt. %, more preferably between 0.01 wt % to 1 wt. %, between 0.02 wt. % to 0.75 wt. %, between 0.03 wt. % to 0.5 wt. %, or between 0.04 wt. % to 0.4 wt. %, based on the total weight of the detergent composition. The at least first glass corrosion inhibitor may be present in the detergent composition in an amount less than 5 wt. % based on the total weight of the detergent composition. Preferably, the at least first glass corrosion inhibitor may be present in an amount less than 4 wt. %, more preferably less than 4.5 wt. %, less than 4.0 wt. %, less than 3.5 wt. %, less than 3.0 wt. %, less than 2.5 wt. %, less than 2.0 wt. %, less than 1.5 wt. %, less than 1.0 wt. %, less than 0.75 wt. %, less than 0.5 wt. %, less than 0.4 wt. %, less than 0.3 wt. %, less than 0.25 wt. % or less than 0.20 wt. %.

[0027] In some embodiments, the detergent composition additionally comprises a second glass corrosion inhibitor. The second glass corrosion inhibitor may be selected from the group consisting of quaternized hydroxy-Ci-C8-alkyl cellulose, zinc, polyvinyl amine polymers, polyvinyl amide polymers or mixtures thereof. Preferably, the second glass corrosion inhibitor is selected from the group consisting of zinc, polyvinyl amine polymers,polyvinyl amide polymers or mixtures thereof. In some embodiments, the second glass corrosion inhibitor is zinc. In other embodiments, the second glass corrosion inhibitor is polyvinyl amine polymers and / or polyvinyl amide polymers. In other embodiments, the second glass corrosion inhibitor is a quaternized hydroxy-Ci-C8-alkyl cellulose.

[0028] The second glass corrosion inhibitor may be present in the detergent composition in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, the second glass corrosion inhibitor may be present in an amount of less than 1.5 wt. %, less than 1.25 wt. %, less than 1 wt. %, less than 0.5 wt. %, less than 0.25 wt. %, less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, the second glass corrosion inhibitor is present in the detergent composition in an amount of less than 1.5 wt. %, based on the total weight of the detergent composition. More preferably, the second glass corrosion inhibitor is present in the detergent composition in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. Even more preferably, the second glass corrosion inhibitor is present in the detergent composition in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition.

[0029] The second glass corrosion inhibitor may be present in the detergent composition in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, based on the total weight of the detergent composition. In some embodiments, the detergent composition is substantially free, preferably completely free of a second glass corrosion inhibitor. In other words, the detergent composition comprises the first glass inhibitor and is substantially free, preferably completely free, of said second glass corrosion inhibitor.

[0030] In some embodiments, the detergent composition comprises the second glass corrosion inhibitor and a third glass corrosion inhibitor. The third glass corrosion inhibitor may be present in the detergent composition in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, the third glass corrosion inhibitor may be present in an amount of less than 1 .5 wt. %, less than 1 .25 wt. %, less than 1 wt. %, less than 0.5 wt. %, less than 0.25 wt. %, less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, the third glass corrosion inhibitor is present in the detergent composition in an amount of less than 1.5 wt. %, based on the total weight of the detergent composition. More preferably, the third glass corrosion inhibitor is present in the detergent composition in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. Even more preferably, the third glass corrosion inhibitor is present in thedetergent composition in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition.

[0031] The third glass corrosion inhibitor may be present in the detergent composition in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, based on the total weight of the detergent composition. In some embodiments, the detergent composition is substantially free, preferably completely free of a third glass corrosion inhibitor.

[0032] In some embodiments, the detergent composition is substantially free, preferably completely free, of any further glass corrosion inhibitors. In other words, the detergent composition may comprise the first glass corrosion inhibitor and no further glass corrosion inhibitors (e.g. a second glass corrosion inhibitor and a third glass corrosion inhibitor) are present in the detergent composition (i.e. no further components, other than the first glass corrosion inhibitor, are present which also exhibit glass corrosion inhibiting properties). In other embodiments, the detergent composition comprises the first glass corrosion inhibitor and the second glass corrosion inhibitor and is substantially free, preferably completely free, of a third glass corrosion inhibitor. In other words, the detergent composition comprises the first glass corrosion inhibitor and the second glass corrosion inhibitor and is substantially free, preferably completely free, of any further glass corrosion inhibitors.

[0033] As used herein, the expression “total amount of glass corrosion inhibitors" means the total amount of said first glass corrosion inhibitor and, if present, any further glass corrosion inhibitors (e.g. second glass corrosion inhibitor, third glass corrosion inhibitor and any further glass corrosion inhibitors). For example, the “total amount of glass corrosion inhibitors" may refer to the total amount of said first glass corrosion inhibitor and said second glass corrosion inhibitor present in the detergent composition. In another example, the “total amount of glass corrosion inhibitors" may refer to the total amount of said first glass corrosion inhibitor, said second glass corrosion inhibitor, and said third glass corrosion inhibitor (and so on) present in the detergent composition. Preferably, the first glass corrosion inhibitor is not the same component as the second glass corrosion inhibitor and / or the third glass corrosion inhibitor. Preferably the second glass corrosion inhibitor and the third glass corrosion inhibitor are not the same component.

[0034] For the sake of clarity and to avoid confusion, any further glass corrosion inhibitors other than said first glass corrosion inhibitor present in the detergent compositions are referred to herein as a “second”, “third”, “fourth” (and so on) glass corrosion inhibitor. If one other glass corrosion inhibitor, other than said first glass corrosion inhibitor, is present in the detergent composition then this is referred to herein as a “second glass corrosion inhibitor”. These are merely labels intended to aid understanding.

[0035] In some embodiments, the total amount of glass corrosion inhibitors present in the detergent composition is between 0.01 wt. % to 5 wt. % based on the total weight of the detergent composition. The total amount of glass corrosion inhibitors present in the detergent composition may be between 0.01 wt. % to 3 wt. %, more preferably between 0.01 wt % to 1 wt. %, between 0.02 wt. % to 0.5 wt. %, or between 0.03 wt. % to 0.4 wt. %, based on the total weight of the detergent composition.

[0036] The total amount of glass corrosion inhibitors present in the detergent composition may be less than 5 wt. % based on the total weight of the detergent composition. For example, the total amount of glass corrosion inhibitors present in the detergent composition may be less than 4.5 wt. %, less than 4.0 wt. %, less than 3.5 wt. %, less than 3.0 wt. %, less than 2.5 wt. %, less than 2.0 wt. %, less than 1 .5 wt. %, less than 1 .0 wt. %, less than 0.5 wt. %, less than 0.4 wt. %, less than 0.3 wt. %, less than 0.25 wt. %, or less than 0.20 wt. %.

[0037] In some embodiments, the second glass corrosion inhibitor is substantially free, preferably completely free of zinc. In other embodiments, the second glass corrosion inhibitor comprises zinc (e.g. a zinc-containing component) in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said zinc-containing component may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said zinc-containing component is present in the second glass corrosion inhibitor in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said zinc-containing component is present in the second glass corrosion inhibitor in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The zinc-containing component may be present in the second glass corrosion inhibitor in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition.

[0038] In some embodiments, the third glass corrosion inhibitor is substantially free, preferably completely free of zinc. In other embodiments, the third glass corrosion inhibitor comprises zinc (e.g. a zinc-containing component) in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said zinc-containing component may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said zinc-containing component is present in the third glass corrosion inhibitor in an amount of less than 0.01 wt. %, based on the totalweight of the detergent composition. More preferably, said zinc-containing component is present in the third glass corrosion inhibitor in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The zinc-containing component may be present in the third glass corrosion inhibitor in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition. In preferred embodiments, the second glass corrosion inhibitor and third glass corrosion inhibitor are substantially free, preferably completely free of zinc.

[0039] In preferred embodiments, the detergent composition is substantially free, preferably completely free of zinc. In other embodiments, the detergent composition further comprises zinc (e.g. a zinc-containing component) in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said zinc-containing component may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said zinc-containing component is present in the detergent composition in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said zinc-containing component is present in the detergent composition in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The zinc-containing component may be present in the detergent composition in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition. Preferably, the detergent composition is substantially free, preferably completely free of zinc.

[0040] In some embodiments, the second glass corrosion inhibitor is substantially free, preferably completely free of polyvinyl amine polymers. In other embodiments, the second glass corrosion inhibitor comprises polyvinyl amine polymers in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said polyvinyl amine polymers may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said polyvinyl amine polymers are present in the second glass corrosion inhibitor in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said polyvinyl amine polymers are present in the second glass corrosion inhibitor in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The polyvinyl amine polymers may bepresent in the second glass corrosion inhibitor in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition.

[0041] In some embodiments, the third glass corrosion inhibitor is substantially free, preferably completely free of polyvinyl amine polymers. In other embodiments, the third glass corrosion inhibitor comprises polyvinyl amine polymers in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said polyvinyl amine polymers may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said polyvinyl amine polymers are present in the third glass corrosion inhibitor in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said polyvinyl amine polymers are present in the third glass corrosion inhibitor in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The polyvinyl amine polymers may be present in the third glass corrosion inhibitor in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition. In preferred embodiments, the second glass corrosion inhibitor and third glass corrosion inhibitor are substantially free, preferably completely free of polyvinyl amine polymers.

[0042] In preferred embodiments, the detergent composition is substantially free, preferably completely free of polyvinyl amine polymers. In other embodiments, the detergent composition further comprises polyvinyl amine polymers in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said polyvinyl amine polymers may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said polyvinyl amine polymers are present in the detergent composition in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said polyvinyl amine polymers are present in the detergent composition in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The polyvinyl amine polymers may be present in the detergent composition in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition. Preferably, the detergent composition is substantially free, preferably completely free of polyvinyl amine polymers.

[0043] In some embodiments, the second glass corrosion inhibitor is substantially free, preferably completely free of polyvinyl amide polymers. In other embodiments, the second glass corrosion inhibitor comprises polyvinyl amide polymers in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said polyvinyl amide polymers may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said polyvinyl amide polymers are present in the second glass corrosion inhibitor in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said polyvinyl amide polymers are present in the second glass corrosion inhibitor in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The polyvinyl amide polymers may be present in the second glass corrosion inhibitor in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition.

[0044] In some embodiments, the third glass corrosion inhibitor is substantially free, preferably completely free of polyvinyl amide polymers. In other embodiments, the third glass corrosion inhibitor comprises polyvinyl amide polymers in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said polyvinyl amide polymers may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said polyvinyl amide polymers are present in the third glass corrosion inhibitor in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said polyvinyl amide polymers are present in the third glass corrosion inhibitor in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The polyvinyl amide polymers may be present in the third glass corrosion inhibitor in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition. In preferred embodiments, the second glass corrosion inhibitor and third glass corrosion inhibitor are substantially free, preferably completely free of polyvinyl amide polymers.

[0045] In preferred embodiments, the detergent composition is substantially free, preferably completely free of polyvinyl amide polymers. In other embodiments, the detergent composition further comprises polyvinyl amide polymers in an amount of less than 2 wt. %, based on the total weight of the detergent composition. For example, said polyvinyl amidepolymers may be present in an amount of less than 0.1 wt. %, less than 0.09 wt. %, less than 0.08 wt. %, less than 0.07 wt. %, less than 0.06 wt. %, less than 0.05 wt. %, less than 0.04 wt. %, less than 0.03 wt. %, less than 0.02 wt. %, less than 0.01 wt. %, less than 0.005 wt. % or less than 0.001 wt. %. Preferably, said polyvinyl amide polymers are present in the detergent composition in an amount of less than 0.01 wt. %, based on the total weight of the detergent composition. More preferably, said polyvinyl amide polymers are present in the detergent composition in an amount of less than 0.005 wt. %, based on the total weight of the detergent composition. The polyvinyl amide polymers may be present in the detergent composition in an amount between 0.0001 wt. % to 2 wt. %, preferably between 0.0005 wt. % to 0.1 wt. %, more preferably between 0.005 wt. % to 0.01 wt. %, based on the total weight of the detergent composition. Preferably, the detergent composition is substantially free, preferably completely free of polyvinyl amide polymers. In preferred embodiments, the detergent composition is substantially free, preferably completely free of zinc and / or polyvinyl amine polymers and / or polyvinyl amide polymers.

[0046] The first glass corrosion inhibitor is a quaternized hydroxy-Ci-C8-alkyl cellulose. Preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose is a quaternized hydroxy-ethyl cellulose or a quaternized hydroxy-propyl cellulose. For example, the quaternized hydroxy- Ci-C8-alkyl cellulose may be a hydroxypropyltrimonium hydroxy-Ci-C8-alkyl cellulose e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose or hydroxypropyltrimonium hydroxy-propyl cellulose. In a preferred embodiment, the first glass corrosion inhibitor is hydroxypropyltrimonium hydroxy-ethyl cellulose.

[0047] Preferably, the detergent composition is substantially free, preferably completely free of any other quaternized celluloses, preferably cationic celluloses, other than said quaternized hydroxy-Ci-C8-alkyl cellulose. More preferably, the detergent composition is substantially free, preferably completely free of any other quaternized polymers, preferably cationic polymers, other than said quaternized hydroxy-Ci-C8-alkyl cellulose.

[0048] Said quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose or hydroxypropyltrimonium hydroxy-propyl cellulose, preferably hydroxypropyltrimonium hydroxy-ethyl cellulose) may be present in the detergent composition in an amount between 0.01 wt. % to 5 wt. % based on the total weight of the detergent composition. The quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose or hydroxypropyltrimonium hydroxy-propyl cellulose, preferably hydroxypropyltrimonium hydroxy-ethyl cellulose) may be present in the detergent composition in an amount less than 5 wt. % based on the total weight of the detergent composition. For example, the quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose or hydroxypropyltrimonium hydroxy-propyl cellulose, preferablyhydroxypropyltrimonium hydroxy-ethyl cellulose) may be present in the detergent composition in an amount between 0.01 wt. % to 3 wt. %, more preferably between 0.01 wt % to 1 wt. %, between 0.02 wt. % to 0.5 wt. %, or between 0.03 wt. % to 0.4 wt. %, based on the total weight of the detergent composition. The quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose or hydroxypropyltrimonium hydroxy-propyl cellulose, preferably hydroxypropyltrimonium hydroxy-ethyl cellulose) may be present in an amount less than 5 wt. %, preferably less than 4.5 wt. %, less than 4.0 wt. %, less than3.5 wt. %, less than 3.0 wt. %, less than 2.5 wt. %, less than 2.0 wt. %, less than 1.5 wt. %, less than 1.0 wt. %, less than 0.5 wt. %, less than 0.4 wt. %, less than 0.3 wt. %, less than 0.25 wt. % or less than 0.20 wt. %.

[0049] In preferred embodiments, the first glass corrosion inhibitor is hydroxypropyltrimonium hydroxy-ethyl cellulose and is present in the detergent composition in an amount between 0.01 wt. % to 5 wt. %, more preferably between 0.01 wt. % to 3 wt. %, between 0.01 wt % to 1 wt. %, between 0.02 wt. % to 0.5 wt. %, or between 0.03 wt. % to 0.4 wt. %, based on the total weight of the detergent composition. Preferably, the detergent composition is substantially free, preferably completely free of any other quaternized celluloses, preferably cationic celluloses, other than hydroxypropyltrimonium hydroxy-ethyl cellulose. More preferably, the detergent composition is substantially free, preferably completely free of any other quaternized polymers, preferably cationic polymers, other than hydroxypropyltrimonium hydroxy-ethyl cellulose.

[0050] The quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) may comprise nitrogen in an amount between 0.01 wt. % to 5 wt. %, preferably 0. 1 wt % to 3 wt. %, more preferably 0.5 wt. % to 2.5 wt. %, even more preferably 1 wt. % to 2.3 wt. %. For example, the quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) may comprise nitrogen in an amount less than 5.0 wt. %, preferably less than 4.5 wt. %, less than 4.0 wt. %, less than 3.5 wt. %, less than 3.0 wt. %, less than 2.9 wt. %, less than 2.8 wt. %, less than 2.7 wt. %, less than2.6 wt. %, less than 2.5 wt. %, less than 2.4 wt. %, less than 2.3 wt. %, or less than 2.2 wt. %. More preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) comprises nitrogen in an amount of less than 3.0 wt. % (e.g. less than 2.2 wt. %). The quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) may comprise nitrogen in an amount of up to 5 wt. %. For example, the the quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) may comprise nitrogen in an amount of up to 4.5 wt. %, up to 4.0 wt. %, up to 3.5 wt. %, up to 3.0 wt. %, up to 2.9 wt. %, up to 2.8 wt. %, up to 2.7 wt. %, up to 2.6 wt. %, up to 2.5 wt. %, up to 2.4 wt. %, up to 2.3 wt. %, or up to 2.2 wt. %.

[0051] The quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) may have a viscosity between 70 cP to 7500 cP when present in a 2 wt. % aqueous solution. For example, the quaternized hydroxy-Ci-C8-alkyl cellulose may have a viscosity of less than 7500 cP e.g. less than 5000 cP, less than 4000 cP, less than 3000 cP, less than 1000 cP, less than 500 cP, less than 250 cP, less than 200 cP, less than 175 cP, when present in a 2 wt. % solution. Preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose has a viscosity between 75 cP to 3000 cP, more preferably between 75 cP to 1000 cP, between 75 cP to 500 cP, between 75 cP to 250 cP, between 75 cP to 200 cP, or between 75 cP to 175 cP, when present in a 2 wt. % aqueous solution. More preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) has a viscosity between 75 cP to 175 cP, when present in a 2 wt. % aqueous solution.

[0052] In some embodiments, the quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) comprises an active matter content ranging from 0.5 wt. % to 10 wt. %, preferably from 0.75 wt. % to 7.5 wt. %, more preferably from 1 wt. % to 5 wt. %, even more preferably from 2 wt. % to 3.5 wt. %. Preferably, the quaternized hydroxy-Ci-C8-alkyl cellulose comprises an active matter content less than 10 wt. %, preferably less than 7.5 wt. %, less than 5 wt. % or less than 3.5 wt. %.

[0053] In some embodiments, the detergent composition is substantially free, preferably completely free of any bleaching agent, bleaching system and / or bleaching activator.

[0054] The dishwashing, preferably automatic dishwashing, detergent composition may further comprise a builder. The builder may either be phosphorous based or non-phosphorous based, or a combination of both types. Suitable builders are well known in the art. The builder may be a phosphate-free builder. In many countries, including the United States and in the European Union, phosphate builders are restricted, or the amount of phosphate permitted in a detergent composition has been severely limited. Therefore, the detergent compositions may be substantially preferably completely, phosphate-free.

[0055] The builder may comprise one or more small molecule builders selected from hydroxycarboxylates (such as a citrate salt, for example trisodium citrate, which may be anhydrous), aminocarboxylates (such as methyl glycine diacetic acid (MGDA), or N,N- dicarboxymethyl glutamic acid (GLDA), dicarboxylic acid amines (such as iminodisuccinic acid (IDS)) and / or phosphates (such as tripolyphosphate), or the salts thereof. Preferably, the builder comprises hydroxycarboxylates (such as a citrate salt, for example trisodium citrate, which may be anhydrous) and / or aminocarboxylates (such as methyl glycine diacetic acid(MGDA), or N,N-dicarboxymethyl glutamic acid (GLDA), dicarboxylic acid amines (such as iminodisuccinic acid (IDS)).

[0056] The builder may be present in the detergent composition in an amount of greater than 10 wt. %, 15 wt. %, 20 wt. %, 25 wt. %, 30 wt. %, 35 wt. %, 40 wt. %, 45 wt. %, orgreaterthan 50 wt. %. The builder may be present in an amount between 31 wt. %, and 49 wt.%, between 32 wt. %, and 41 %wt., or between 33 wt. %, and 39 % wt. The builder may be present in an amount up to 0.1 wt. %, 0.2 wt. %, 0.3 wt. %, 0.4 wt. %, 0.5 wt. %, 0.6 wt. %, 0.7 wt. %, 0.8 wt. %, 0.9 wt. %, 1 wt. %, 1.5 wt. %, 2 wt. %, 3 wt. %, 4 wt. %, 5 wt. %, 6 wt. %, 7 wt. %, 8 wt. %, 9 wt. %, or up to 10 wt. %. The actual amount used in the detergent composition may depend upon the nature of the builder used.

[0057] In one embodiment, the detergent composition further comprises a builder in an amount between 1 wt. % to 40 wt. %, preferably between 10 wt. % to 35 wt. %, more preferably between 15 wt. % to 25 wt. %; wherein the builder comprises hydroxycarboxylates, preferably a citrate salt, more preferably trisodium citrate; and / or aminocarboxylates, preferably methyl glycine diacetic acid (MGDA) or N,N-dicarboxymethyl glutamic acid (GLDA).

[0058] In other embodiments, the detergent composition further comprises a builder in an amount between 1 wt. % to 40 wt. %, preferably between 10 wt. % to 35 wt. %, more preferably between 15 wt. % to 25 wt. %; wherein the builder comprises hydroxycarboxylates, preferably a citrate salt, more preferably trisodium citrate; and wherein the builder is substantially, preferably completely free of aminocarboxylates, preferably methyl glycine diacetic acid (MGDA) and / or N,N-dicarboxymethyl glutamic acid (GLDA).

[0059] The detergent composition may further comprise a phosphonate. The phosphonate may be present in the detergent composition in an amount between 0.1 wt. % to 20 wt. % based on the total weight of the detergent composition. In some embodiments, the phosphonate comprises etidronic acid and / or salts thereof.

[0060] The phosphonate may be present in the detergent composition in an amount less than 20 wt. % based on the total weight of the detergent composition. For example, the phosphonate may be present in the detergent composition in an amount less than 15 wt. %, preferably less than 10 wt. %, less than 9 wt. %, less than 8 wt. %, less than 7 wt. %, less than 6 wt. %, less than 5.5 wt. % or less than 5 wt. %. Preferably, the phosphonate is present in the detergent composition in an amount between 0.01 wt. % to 15 wt. %, more preferably between 0.1 wt % to 10 wt. %, between 0.5 wt. % to 7.5 wt. % or between 1 wt. % to 5 wt. %. More preferably, the phosphonate (e.g. etidronic acid and / or salts thereof) is present in the detergent composition in an amount between 1 wt. % to 5 wt. %.

[0061] The dishwashing, preferably automatic dishwashing, detergent composition of the present invention can comprise one or more surfactant(s). Any of non-ionic, anionic, cationic, amphoteric or zwitterionic surface active agents or suitable mixtures thereof may be used. Many such suitable surfactants are described in Kirk Othmer's Encyclopedia of Chemical Technology, 3rd Ed., Vol. 22, pp. 360-379, "Surfactants and Detersive Systems", incorporated by reference herein.

[0062] In the case of automatic dishwashing compositions, it is preferred to minimise the amount of anionic surfactant. Accordingly, preferably the detergent composition comprises no more than 15 wt. %, no more than 10 wt. %, no more than 5 wt. %, no more than 2 wt. %, no more than 1 wt. % anionic surfactant. For example, the detergent composition may be substantially, or completely free of anionic surfactants. Preferably the composition comprises no more than 15 wt. %, no more than 10 wt. %, no more than 5 wt. %, no more than 2 wt. %, no more than 1 wt. % ionic surfactant of any type. For example, the detergent composition may be substantially, or completely free of ionic surfactants of any type.

[0063] Non-ionic surfactants are preferred for automatic dishwashing products. Accordingly, the detergent composition may further comprise one or more non-ionic surfactant(s). The non-ionic surfactant may be an optionally end capped alkyl alkoxylate. A preferred class of non-ionic surfactants are ethoxylated non-ionic surfactants prepared by the reaction of a monohydroxy alkanol or alkyl phenol with 6 to 20 carbon atoms. Preferably the surfactants have at least 12 moles per mole of alcohol or alkyl phenol. Particularly preferred non-ionic surfactants are the non-ionics from a linear chain fatty alcohol with 10-20 carbon atoms and at least 5 moles of ethylene oxide per mole of alcohol. The non-ionic surfactant may comprise propylene oxide (PO) units in the molecule. The PO units may constitute up to 40 wt. %, 35 wt. %, 30 wt. %, 25 wt. %, 20 wt. %, or up to 15 wt. %, of the overall molecular weight of the non-ionic surfactant. The use of a mixture of any of the aforementioned non-ionic surfactants is suitable in compositions of the present invention.

[0064] The one or more non-ionic surfactant(s) (e.g. non-ionic surfactant(s)) may be present in an amount between 1 wt. % to 30 wt. %, e.g. between 1 wt. % to 15 wt. % or between 2 wt. % to 10 wt. %, based on the total weight of the detergent composition.

[0065] The detergent composition may further comprise one or more enzymes (e.g. amylase and / or protease). The one or more enzymes (e.g. enzyme(s) may be present in an amount between 0.1 wt. % to 15 wt. % based on the total weight of the detergent composition. For example, the detergent composition may comprise one or more enzymes in an amount between 0.5 wt. % to 15 wt. %, between 1 wt. % to 10 wt. %, between 0.5 wt. % to 15 wt. % or between 2 wt. % to 5 wt. %.

[0066] In some embodiments, the detergent composition is wrapped into at least one water- soluble film comprising polyvinyl alcohol (PVOH), preferably being a PVOH foil; wherein preferably such a water-soluble film has a thickness ranging from 50 to 150 micrometers; and wherein in particular 300 to 600 mg of such a water-soluble film material is required for a monodose ADW product.

[0067] Further, the object of the present invention is also solved by the use of such an inventive dishwashing, preferably an automatic dishwashing, detergent composition for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods.

[0068] The present invention thus addresses the problem of providing a dishwashing, preferably an automatic dishwashing, detergent composition, which reduces or ideally even completely avoids any glass corrosion being at least comparable to the commonly used dishwashing detergent compositions comprising high amounts of other glass caring agents.

[0069] Moreover, the object of the present invention is also solved by the use of a quaternized hydroxy-Ci-C8-alkyl cellulose (e.g. hydroxypropyltrimonium hydroxy-ethyl cellulose) as a glass corrosion inhibitor for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods. The quaternized hydroxy-Ci-C8-alkyl cellulose is as described herein according to the first aspect of the present invention.EXAMPLES

[0070] The present invention will now be described in further detail by the non-limiting examples provided below. The following definitions of terms and determination methods apply for the above general description of the invention as well as to the below examples unless otherwise defined. The following non-limiting examples are provided to illustrate an embodiment of the present invention and to facilitate understanding of the invention but are not intended to limit the scope of the invention, which is defined by the claims appended hereto.

[0071] The following basis formulation has been used for the experiments of the present invention. All formulations tested have been identical except for the presence or non-presence of a glass corrosion inhibitor.Table 1: Exemplary base compositions described herein

[0072] Table 2 set out below shows the presence or non-presence of a glass corrosion inhibitor and the respective weight percentages (wt.%) applied.Table 2: Example compositions

[0073] Herein, the comparative example is executed without any glass corrosion inhibitor.

[0074] The glass caring agent used herein in Example 1 is a quaternized hydroxy-ethyl cellulose, namely Supracare™ 212, which is a commercially available product from Dow Chemical. Supracare™ 212 has a viscosity of <175 cP (when present in a 2 wt. % aqueous solution), an active matter content of 3 wt.% and contains <2.2 wt.% nitrogen.Glass Corrosion Test

[0075] For the glass corrosion tests, the dishwasher model Miele G 1222 SC GSL was used and a program with main rinse temperature of 65°C is selected. The water hardness was set to < 1 °GH. The machine is loaded with clear glasses, clear glasses with decoration and ceramics with decoration. No artificial soil is added to the dishwasher.

[0076] 29.5g of the Example compositions are dosed in the dosage chamber of the machine. The articles are visually examined in natural light after 50 cycles to fix the degree of surface damage. Furthermore, the mass loss of glasses is measured.

[0077] Scores range from 1-5 while 5 means no damage of the glass and 1 means very strong surface damage (higher numbers indicate superiority). A significant difference is a score for 0.5 on clouding, cordlines and decoloration.Table 3: Summary of Performance results.*: higher numbers indicate technical superiority.**: lower numbers indicate technical superiority.

[0078] While the principles of the invention have been explained in relation to certain particular embodiments, and are provided for purposes of illustration, it is to be understood that various modifications thereof will become apparent to those skilled in the art upon reading the specification. Therefore, it is to be understood that the invention disclosed herein is intended to cover such modifications as fall within the scope of the appended claims. The scope of the invention is limited only by the scope of the appended claims.

Claims

CLAIMS1. A dishwashing detergent composition, preferably an automatic dishwashing detergent composition, characterized in that the detergent composition comprises at least a first glass corrosion inhibitor; wherein said at least first glass corrosion inhibitor is a quaternized hydroxy-Ci-C8-alkyl cellulose.

2. The dishwashing detergent composition according to claim 1 , wherein the detergent composition further comprises a second glass corrosion inhibitor in an amount of less than 0.1 wt. %, preferably less than 0.05 wt. %, more preferably less than 0.01 wt. %, based on the total weight of the detergent composition.

3. The dishwashing detergent composition according to any one of the preceding claims, wherein the detergent composition is substantially free, preferably completely free, of any further glass corrosion inhibitors.

4. The dishwashing detergent composition according to any one of the preceding claims, wherein said at least first glass corrosion inhibitor is present in an amount between 0.01 wt. % to 5 wt. %, preferably 0.01 wt % to 1 wt. %, more preferably 0.02 wt. % to 0.5 wt. %, even more preferably 0.03 wt. % to 0.4 wt. %, based on the total weight of the detergent composition.

5. The dishwashing detergent composition according to any one of the preceding claims, wherein the total amount glass corrosion inhibitors present in the detergent composition is less than 5 wt. %, preferably less than 3 wt. %, more preferably less than 0.5 wt. %, even more preferably less than 0.2 wt. %, based on the total weight of the detergent composition.

6. The dishwashing detergent composition according to any one of the preceding claims, wherein said quaternized hydroxy-Ci-C8-alkyl cellulose is a quaternized hydroxy-ethyl cellulose or a quaternized hydroxy-propyl cellulose.

7. The dishwashing detergent composition according to any one of the preceding claims, wherein said quaternized hydroxy-Ci-C8-alkyl cellulose is a hydroxypropyltrimonium hydroxy-Ci-C8-alkyl cellulose, preferably wherein said quaternized hydroxy-Ci-C8-alkylcellulose is hydroxypropyltrimonium hydroxy-ethyl cellulose or is hydroxypropyltrimonium hydroxy- propyl cellulose, more preferably is hydroxypropyltrimonium hydroxy-ethyl cellulose.

8. The dishwashing detergent composition according to any one of the preceding claims, wherein the detergent composition is substantially free, preferably completely free, of any other cationic polymers other than said quaternized hydroxy-Ci-C8-alkyl cellulose.

9. The dishwashing detergent composition according to any one of the preceding claims, wherein said quaternized hydroxy-Ci-C8-alkyl cellulose comprises nitrogen in an amount between 0.01 wt. % to 5 wt. %, preferably 0.1 wt % to 3 wt. %, more preferably 0.5 wt. % to 2.5 wt. %, even more preferably 1 wt. % to 2.3 wt. %.

10. The dishwashing detergent composition according to any one of the preceding claims, wherein said quaternized hydroxy-Ci-C8-alkyl cellulose has a viscosity between 70 cP to 7500 cP, preferably between 75 cP to 3000 cP, more preferably between 75 cP to 175 cP, when present in a 2 wt. % solution.11 . The dishwashing detergent composition according to any one of claims 2-10, wherein the second glass corrosion inhibitor is selected from the group consisting of zinc, polyvinyl amine polymers, polyvinyl amide polymers or mixtures thereof.

12. The dishwashing detergent composition according to any one of claims 2-10, wherein the second glass corrosion inhibitor is substantially free, preferably completely free, of zinc and / or polyvinyl amine polymers and / or polyvinyl amide polymers.

13. The dishwashing detergent composition according to any one of the preceding claims, further comprising a phosphonate, wherein said phosphonate is present in an amount between 0.1 wt. % to 20 wt. % based on the total weight of the detergent composition and / or wherein said phosphonate comprises etidronic acid and / or salts thereof.

14. The dishwashing detergent composition according to any one of the preceding claims, further comprising a builder in an amount between 1 wt. % to 30 wt. % based on the total weight of the detergent composition; wherein said builder comprises:(i) hydroxycarboxylates, preferably a citrate salt, more preferably trisodium citrate; and / or(ii) aminocarboxylates, preferably methyl glycine diacetic acid (MGDA) or N,N- dicarboxymethyl glutamic acid (GLDA).

15. Use of a dishwashing detergent composition according to one of the preceding claims for glass corrosion protection of glass dishwashing goods and / or for decor protection of glass and / or ceramic dishwashing goods.

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