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CA-3084144-C - AUTOMATIC DISHWASHING DETERGENT COMPOSITION

CA3084144CCA 3084144 CCA3084144 CCA 3084144CCA-3084144-C

Abstract

A phosphate-free automatic dishwashing cleaning composition comprising: i) a protease wherein the protease is a variant having at least 60% identity with the amino acid sequence of SEQ ID NO:1 and comprising at least one amino acid substitution (using the SEQ ID NO: 1 numbering) selected from the group consisting of: X54T; X126A, D, G, V, E, K, I; X127E, S, T, A, P, G, C; and X128E, C, T, D, P, G, L, Y, N; and ii) from 10 to 50% by weight of the composition of a complexing agent system comprising from 0 to less than 30% by weight of the composition of citric acid.

Inventors

  • Michelle Jackson
  • LYIDA DANKMEYER
  • Thijs Kaper
  • Hatice Billur Engin
  • Eva Maria PEREZ-PRAT de VINUESA
  • David John Tarbit
  • Philip Frank Souter
  • Lilia Maria Babe
  • David Aaron Estell
  • Frits Goedegebuur
  • Harm Jan MULDER
  • Sina Pricelius

Assignees

  • THE PROCTER & GAMBLE COMPANY

Dates

Publication Date
20260505
Application Date
20181217
Priority Date
20171219

Claims (12)

  1. 57 CLAIMS 1. A phosphate-free automatic dishwashing cleaning composition comprising: i) a protease wherein the protease is a variant comprising at least 90% sequence 5 identity with the full-length of amino acid sequence of SEQ ID NO:1 and comprising the following substitutions: P54T, S126A, D127E and F128G (using the SEQ ID NO:1 numbering); and ii) from 10 to 50% by weight of the composition of a complexing agent system 10 comprising from more than 0 to less than 30% of citric acid by weight of the composition.
  2. 2. The composition according to claim 1, wherein the complexing agent system comprises a complexing agent comprising methyl glycine diacetic acid, glutamic-N,N-diacetic 15 acid, iminodisuccinic acid, or carboxy methyl inulin, or any mixture thereof.
  3. 3. The composition according to claim 2, wherein the complexing agent comprises a salt of methyl glycine diacetic acid. 20
  4. 4. The composition according to claim 2, wherein the complexing agent system comprises methyl glycine diacetic acid.
  5. 5. The composition according to claim 4, wherein the citric acid and methyl glycine diacetic acid are in a weight ratio of from about 0.5:1 to about 2:1. 25
  6. 6. The composition according to any one of claims 1 to 5, wherein the composition further comprises a bleaching system, and wherein the composition comprises at least 10% by weight of bleach.
  7. 7. The composition according to claim 6, wherein the composition further comprises a bleach activator or a bleach catalyst.
  8. 8. The composition according to any one of claims 1 to 5, further comprising: 58 i) a bleaching system comprising at least 10% percarbonate by weight of the composition, and optionally a bleach activator and/or a bleach catalyst; ii) a non-ionic surfactant; iii) a dispersant polymer; and iv) an amylase. 5
  9. 9. The composition according to claim 8, wherein the composition further comprises: v) a glass care agent.
  10. 10. A method of washing soiled dishware in a dishwasher using soft water comprising the 10 steps of: i) providing the soiled dishware; ii) treating the dishware with the cleaning composition as defined in any one of claims 1 to 9; and iii) optionally rinsing the dishware. 15
  11. 11. The method according to claim 10, wherein the dishwasher uses a hot, long cycle.
  12. 12. Use of the composition as defined in any one of claims 1 to 9 for automatic dishwashing using soft water and/or using a hot, long dishwashing cycle. 20

Description

1 AUTOMATIC DISHWASHING DETERGENT COMPOSITION FIELD The present invention is in the field of detergents. In particular, it relates to a phosphate-free automatic dishwashing detergent composition comprising a new protease. The composition 5 provides improved cleaning under a plurality of conditions versus compositions comprising conventional proteases. BACKGROUND There is a permanent desire to improve the performance of automatic dishwashing compositions 10 and their environmental profile. Due to environmental concerns phosphate is increasingly being replaced by biodegradable complexing agents. These complexing agents can have a strong binding capacity for metals and/or are used in high levels and can negatively affect the performance of enzymes, in particular 15 complexing agents can negatively affect proteases by extracting the structural calcium metal ions of the protease. The proteases can be affected in product and/or in-use. They can be more affected under fully built or overbuilt conditions, i.e., when a composition comprises high level of complexing agent and the composition is used in soft water because there will be more free builder to complex with the structural calcium metal ions of the protease. For the toughest items, 20 consumers would usually select hot, long automatic dishwashing cycles. These cycles create a lot of stress on enzymes. Automatic dishwashing compositions can be designed to have optimum performance under certain in-use conditions, for example a composition can be designed to have optimum performance in a 25 soft water cycle, however a composition that has optimum performance in soft water might not have optimum performance in a hard water cycle and vice versa. The object of the present disclosure is to provide a phosphate-free automatic dishwashing composition that provides better cleaning when used in soft water and preferably under different 30 water hardness’s. It is also desirable that the composition provides improved performance even under stressed conditions such as heavily soiled load washed in hot, long cycles. 2 SUMMARY Certain exemplary embodiments provide a phosphate-free automatic dishwashing cleaning composition comprising: i) a protease wherein the protease is a variant comprising at least 90% sequence identity with the full-length of amino acid sequence of SEQ ID NO:1 and comprising the following substitutions: P54T, S126A, D127E and F128G (using the SEQ ID NO:1 5 numbering); and ii) from 10 to 50% by weight of the composition of a complexing agent system comprising from more than 0 to less than 30% of citric acid by weight of the composition. According to the first aspect of the present disclosure, there is provided a phosphate-free automatic dishwashing cleaning composition. The composition comprises a complexing agent system and a novel protease. The composition presents improved cleaning performance on egg and sugary stains such as crème brule. The composition performs really well even when soft water is used in the automatic dishwashing process and even when a hot long cycle is used. 15 According to the second aspect of the disclosure there is provided a method of automatic dishwashing using soft water and a method of automatic dishwashing using a hot, long cycle. According to the third aspect of the disclosure, there is provided the use of the composition of the disclosure for automatic dishwashing using soft water and the use of the composition of the 20 disclosure for automatic dishwashing using soft water in a hot, long cycle. The elements of the composition of the disclosure described in connexion with the first aspect of the disclosure apply mutatis mutandis to the other aspects of the disclosure. DETAILED DESCRIPTION OF THE INVENTION The present invention encompasses an automatic dishwashing cleaning composition. The composition is phosphate-free and comprises a complexing agent system and a protease. The composition delivers improved cleaning versus cleaning compositions comprising conventional proteases under a plurality of conditions. The composition provides good proteinaceous cleaning, 30 in particular on egg and crème brulee soils. The invention also encompasses methods of automatic dishwashing with soft water and also methods of automatic dishwashing with soft water using hot, long cycles. 3 By “soft” water is herein meant water having a hardness of less than about 2 gpg (34.3 ppm). Grain per gallon (gpg) is a unit of water hardness defined as 1 grain (64.8 milligrams) of calcium carbonate dissolved in 1 US gallon of water (3.785412 L). It translates into 17.1 parts per million (ppm). 5 By “hot” cycle is herein understood a dishwashing program in which the main cycle is performed at a temperature above 50°C, preferably above 55°C. By “long” cycle is herein understood a dishwashing program in which the main cycle has a 10 duration of at least 25, preferably at least 30 and more preferably at least 35 minutes and especially at least 45 minutes.