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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/08—Silicates
• • 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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/06—Phosphates, including polyphosphates
• • 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
  • C11D3/38609—Protease or amylase in solid compositions only

Definitions

• the detergent After the detergent container is opened, the detergent will be exposed to the environment which contains moisture. During each instance that the detergent is exposed to the environment it could possibly absorb some moisture. This absorption occurs by components of the detergent composition absorbing moisture, when in contact with the atmosphere. This effect is increased as the container is emptied, since there will be a greater volume of air in contact with the detergent, and thus more available moisture to be absorbed by the detergent composition. This will usually accelerate the decrease in the activity of the detergent composition.
• the most efficient way to keep a high activity is to start with an initial high activity of enzyme and to use components in the dishwashing composition which do not interact with the enzyme or which have a low water affinity which will minimize any losses in activity as the detergent is being stored or used.
• Powdered detergent compositions which contain enzymes can be made more stable and to have a high activity, if the initial free water content of the detergent composition is less than 10 percent by weight, more preferably less than 9 percent by weight and most preferably less than 8 percent by weight. Furthermore, the pH of a 1.0 wt% aqueous solution of the powdered detergent composition should be less than 11.0 more preferably less than 10.5, and most preferably less than 10.3. This low alkalinity of the dishwashing detergent should maintain the stability of the detergent composition which contains a mixture of enzymes, thereby providing a higher initial activity of the mixture of the enzymes and the maintenance of this initial high activity.
• a major concern in the use of automatic dishwashing compositions is the formulation of automatic dishwashing compositions which have a low alkalinity and can operate at a high temperature while maintaining superior cleaning performance and dish care.
• the present invention teaches the preparation and use of powdered automatic dishwashing compositions which are phosphate-containing and have superior cleaning performance and dish care, and are used at operating temperatures of 100°F to 140°F.
• the aforementioned prior art fails to provide a stable powdered automatic dishwashing detergent which is phosphate-containing and contains a mixture of enzymes as well as optionally, a peroxygen compound with an activatorfor the simultaneous degradation of both proteins and starches, wherein the combination of anylase and protease enzymes have a maximum activity at a pH of less than 11.0 and the powdered automatic dishwashing detergent has high cleaning performance in a temperature range of 40°C to 65°C (104°F to 150°F).
• nonionic surfactants that can be used in the present powdered automatic dishwasher detergent compositions are well known. A wide variety of these surfactants can be used.
• the higher alkanol is a high fatty alcohol of 9 to 11 or 12 to 15 carbon atoms and which contain from 5 to 15 or 5 to 16 lower alkoxy groups per mole.
• the lower alkoxy is ethoxy but in some instances, it may be desirably mixed with propoxy, the latter, if present, usually being major (more than 50%) portion.
• the alkanol is of 12 to 15 carbon atoms and which contain about 7 ethylene oxide groups per mole.
• Dobanol 91-5 is a low foam ethoxylated C9-C11 fatty alcohol with an average of 5 moles ethylene oxide and Dobanol 25-7 is an ethoxylated C 12 -C 15 fatty alcohol with an average of 7 moles ethylene oxide.
• Another liquid nonionic surfactant that can be used is sold under the tradename Lutensol SC 9713.
• Poly-Tergent nonionic surfactants from Olin Organic Chemicals such as Poly-Tergent SLF-18 is a biodegradable, low-foaming surfactantwhich is specially preferred for the powdered automatic dishwasher detergent compositions of this instant invention.
• Poly-Tergent SLF-18 is also characterized as being a water dispersible and having a low cloud point, a lower surface tension.
• Synperonic nonionic surfactants from ICI such as Synperonic LF/D25, LF/RA30 are especially preferred nonionic surfactants that can be used in the powdered automatic dishwasher detergent compositions of the instant invention.
• Neodol 25-7 and Neodol 23-6.5 are made by Shell Chemical Company, Inc.
• the former is a condensation product of a mixture of higher fatty alcohols averaging about 12 to 13 carbon atoms and the number of ethylene oxide groups present averages 6.5.
• the higher alcohols are primary alkanols.
• Other examples of such detergents include Tergitol 15-S-7 and Tergitol 15-S-9 (registered trademarks), both of which are linear secondary alcohol ethoxylates made by Union Carbide Corp.
• the former is mixed ethoxylation product of 11 to 15 carbon atoms linear secondary alkanol with seven moles of ethylene oxide and the latter is a similar product but with nine moles of ethylene oxide being reacted.

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Cited By (12)

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Citations (1)

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• 1992
  • 1992-05-11 AU AU16166/92A patent/AU654184B2/en not_active Ceased
  • 1992-05-20 NZ NZ242839A patent/NZ242839A/en unknown
  • 1992-05-25 NO NO92922050A patent/NO922050L/no unknown
  • 1992-05-28 CA CA002069853A patent/CA2069853A1/fr not_active Abandoned
  • 1992-05-29 FI FI922491A patent/FI922491A/fi not_active Application Discontinuation
  • 1992-05-29 EP EP19920401475 patent/EP0516554A3/en not_active Withdrawn
  • 1992-05-29 PT PT100535A patent/PT100535A/pt not_active Application Discontinuation
  • 1992-05-29 GR GR920100231A patent/GR920100231A/el unknown
  • 1992-06-01 FR FR9206615A patent/FR2689901B1/fr not_active Expired - Lifetime

Patent Citations (1)

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