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
  • C11D3/395—Bleaching agents
  • C11D3/3958—Bleaching agents combined with phosphates

Definitions

• ABSTRACT A dishwashing composition having high stability against loss of available chlorine is formulated to contain 0.5 to 10 percent by weight of sodium dichloroisocyanurate dihydrate, 5 to 65 percent of an alkali metal silicate, 20 to 60 percent of a compound having water softening and detergent building properties, usually sodium tripolyphosphate, 0.5 to 10 percent of a low-foaming chlorine-compatible nonionic surface active agent, and 0 to 50 percent of filler, usually sodium carbonate.
• This invention relates to detergent compositions use ful as cleaners and, more specifically, to those compositions containing sodium dichloroisocyanurate dihydrate which are useful in household automatic dishwashing machines.
• chlorinating agents such as chlorinated isocyanurates, alkaline silicates, known detergent builders such as sodium tripolyphosphate, low-foaming chlorinecompatible nonionic surfactants, and, optionally, fillers such as sodium carbonate.
• dishwashing compositions having improved stability against loss of available chlorine contain by weight the following essential ingredients:
• An alkali metal silicate having a M to SiO weight ratio of about 1:3.3 to 1:1, M being either sodium or potassium. From about to about 65 percent, preferably about 20 to about 65 percent.
• a compound having water-softening and detergent building properties preferably a polyphosphate having an R 0 to P 0 mol ratio of 1:1 to 2:1, R being either sodium or potassium. From about 20 to about 60 percent, preferably about 30 to about 50 percent.
• a low-foaming nonionic surface active agent compatible with chlorinated isocyanurates From about 0.5 to about percent, preferably about 1 to about 5 percent.
• Filler usually sodium carbonate or sodium sulfate, or mixtures of these; essentially the balance of the compositions, usually from about 0 to about 50 percent.
• the sodium dichloroisocyanurate dihydrate component provides available chlorine which aids in the cleaning action and acts as an excellent destainer and germicide.
• the particle size of the sodium dichloroisocyanurate dihydrate has not been found critical; in general, any granular product can be used with good effect.
• the nonionic surfactant components result in a preparation high in food soil defoaming power, i.e., a preparation which has little or no tendency to foam by itself or in the presence of a foam-producing food soil.
• the nonionic surfactant employed must have a combination of three properties: (1) it must be a low-foaming material; (2) it must be capable of defoaming food soils such as milk; and (3) it must be compatible with chlorinated isocyanurates, that is, it must not decompose these chlorinated compounds markedly in the formulation.
• Nonionic surfactants which meet these requirements include the lower alkyl ethers of polyoxyethylated octylphenols such as those sold under the Triton CF trade name, for example Triton CF-54l which is the butyl ether of polyoxyethylated octylphenol; an alkylether of polyoxyethylated alkanol such as Triton DF12"; polyoxyalkylene glycols having a plurality of alternating hydrophobic and hydrophilic polyoxyalkylene chains, the hydrophilic chains consisting of linked oxyethylene radicals and the hydrophobic chains consisting of linked oxypropylene radicals, said product having three hydrophobic chains linked by two hydrophilic chains, the central hydrophobic chain constituting 3O to 34 percent by weight of the product, the terminal hydrophobic chains together constituting 31 to 39 percent by weight of the product, the linking hydrophilic chains together constituting 31 to 35 percent by weight of the product, the intrinsic viscosity of the product
• the builder component functions as a water softener and a detergent builder.
• Polyphosphates of commerce having an Na O or K 0 to P 0 mol ratio of about 1:1 to 2:1 can be used.
• Typical polyphosphates of this kind are the preferred sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate as well as the corresponding potassium polyphosphates.
• the particle size of the polyphosphate is not considered critical and any finely divided commercially available product can be employed.
• Non-phosphate builders and water softeners are suitable also such as for instances nitrilotriacetic acid (NTA); Polycarboxlic acids formed from the polymerization of polycarboxylic monomers and described in US. Pat. No. 3,308,067 and related polyelectrolytes.
• the alkali metal silicate acts as a detergent builder and enhances the cleaning action.
• the silicate also acts as a corrosion inhibitor for metal parts of the dishwashing machine.
• Typical alkali metal silicates which can be used in the formulation are those having an M to SiO ratio of about 1:33 to 1:1 and containing about 0 to about percent of water. These include sodium metasilicate anhydrous and sodium metasilicate S-hydrate, GD Silicate also called disilicate, which is a product having an Na O to Si0 ratio of 1:2 and typically available in the form containing bound water in the amount of 18.5 percent, and G Silicate, which has an Na O to SiO ratio of 123.22 and a typical water content of about 19 percent.
• composition While the above constitutes the essential ingredients of the composition it is to be understood that additional ingredients such as fillers, e.g., sodium chloride, sodium sulfate, etc., coloring agents and perfumes may also be added without departing from the basic formulation. All components are by weight based on the composition.
• fillers e.g., sodium chloride, sodium sulfate, etc.
• coloring agents and perfumes may also be added without departing from the basic formulation. All components are by weight based on the composition.
• the nonionic surfactant is added to the alkali metal silicate and the alkali metal carbonate (if used) with good mixing. This is also desirable because the nonionic surfactant is a liquid and is readily absorbed by the particulate alkali metal silicate and alkali metal carbonate.
• the alkali metal silicate and alkali metal carbonate are mixed with the nonionic surfactant followed by the addition of sodium tripolyphosphate and sodium dichloroisocyanurate dihydrate.
• Each of these ingredients is added with vigorous mixing so that the particulate formulation is substantially homogeneous with a minimum of segregation of any given ingredients. Normally it is advisable to use ingredients having approximately the same particle size in order to prevent segregation on storage.
• EXAMPLE 1 Formulation Component 1 11 111 Available chlorine as chlorinated isocyanurate 1 1.5 1.5 1.5 1.5 Sodium tripolyphosphate 30.0 30.0 30.0 Nonionic surfactant (Plurafac RA 43) 3.5 3.5 5.0
• a dishwashing detergent composition having good stability against loss of available chlorine and consisting essentially of on a percent weight basis:
• an alkali metal silicate having 21 M 0 to SiO mol ratio of 1:3.3 to 1:1, M being either sodium or potassium; from about 5 to about 65 percent;
• detergent builder and water softener from about 20 to about 60 percent;
• a low-foaming nonionic surface active agent compatible with chlorinated isocyanurates from about 0.5 to about 10 percent;
• a filler from about 0 to about 50 percent.
• composition according to claim 1 wherein (3) is a polyphosphate having an R 0 to P 0 mol ratio of 1:1 to 2:1, R being either sodium or potassium.
• composition according to claim 3 wherein (3) is sodium tripolyphosphate.
• composition according to claim 1 wherein (5) is selected from the class consisting of sodium carbonate and sodium sulfate or mixtures thereof.

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)
• Detergent Compositions (AREA)

Priority Applications (19)

Applications Claiming Priority (3)

Publications (1)

Family

ID=27405375

Family Applications (2)

Family Applications After (1)

Country Status (16)

Cited By (20)

Families Citing this family (19)

Family Cites Families (13)

• 1973
  • 1973-05-14 US US00359915A patent/US3816320A/en not_active Expired - Lifetime
  • 1973-08-06 US US05/385,843 patent/US3936386A/en not_active Expired - Lifetime
  • 1973-10-19 CA CA183,849A patent/CA1004947A/en not_active Expired
  • 1973-10-25 AU AU61828/73A patent/AU475171B2/en not_active Expired
  • 1973-11-05 NL NLAANVRAGE7315130,A patent/NL178427C/nl not_active IP Right Cessation
  • 1973-11-06 AR AR250864A patent/AR196703A1/es active
  • 1973-11-06 JP JP12407573A patent/JPS5521798B2/ja not_active Expired
  • 1973-11-08 IT IT31075/73A patent/IT1006630B/it active
  • 1973-11-21 FI FI3588/73A patent/FI57126C/fi active
  • 1973-11-21 FR FR7341490A patent/FR2207982B1/fr not_active Expired
  • 1973-11-21 GB GB5393173A patent/GB1415070A/en not_active Expired
  • 1973-11-21 AT AT975973A patent/AT331949B/de not_active IP Right Cessation
  • 1973-11-22 DE DE2358249A patent/DE2358249C2/de not_active Expired
  • 1973-11-23 BE BE138142A patent/BE807770A/xx not_active IP Right Cessation
  • 1973-11-23 SE SE7315926A patent/SE415033B/xx unknown
  • 1973-11-23 CH CH7316542A patent/CH581695A5/xx not_active IP Right Cessation
  • 1973-11-23 DK DK634373AA patent/DK140023B/da not_active IP Right Cessation

Also Published As

Similar Documents

Legal Events