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
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0026—Low foaming or foam regulating 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/38—Cationic compounds
  • C11D1/52—Carboxylic amides, alkylolamides or imides or their condensation products with alkylene oxides
  • C11D1/528—Carboxylic amides (R1-CO-NR2R3), where at least one of the chains R1, R2 or R3 is interrupted by a functional group, e.g. a -NH-, -NR-, -CO-, or -CON- group
• • 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
  • C11D3/22—Carbohydrates or derivatives thereof
  • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
• • 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
  • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones

Definitions

• This invention relates to granules containing a silicone-based anti-foam and to a process for manufacturing them, as well as to a detergent powder containing the granules.
• Granules containing a silicone-based anti-foam are known. Certain granules of this type are described in British patent No 1492,939 and others in French patent No 2,462,184. Our unpublished British patent application No 8123492 also relates to granules containing a silicone-based anti-foam.
• the process which is described in the specification of that application involves granulating gelatinised starch whilst spraying on a mixture of a silicone oil and a hydrophobic silica. A solution of paraffin wax in chloroform is then sprayed onto the granules and the solvent is evaporated.
• the present invention provides a process for the manufacture of granules containing a silicone-based anti-foam which comprises the steps of:
• the silicone comprises a mixture of a liquid or liquifiable polysiloxane with particles of a hydrophobic material
• the hydrophobic material is preferably a hydrophobed silica, a water-insoluble salt of an alkyl phosphoric acid, or a compound of one of the following general formulae: or where R and R 3 represent aliphatic hydrocarbon residues containing 14-22 carbon atoms, R 2 and. R 4 represent hydrogen atoms or aliphatic hydrocarbon residues containing 1-22 carbon atoms, and R represents an aliphatic residue containing 1-9 carbon atoms.
• alkylene-bis-amides and in particular ethylene and methylene-bis-stearimide are the preferred compounds, that is to say compounds of the general formula: where x is an integer from 5 to 25 and n is 1 or 2 and in particular compounds of the formula.
• Preferred waxes are of mineral origin, especially those derived from petroleum, including microcrystalline and oxidised microcrystalline petroleum waxes and paraffin waxes.
• synthetic waxes, or natural waxes such as Montan waxes, beeswax, candelilla or carnauba waxes may also be used as may a mixture of any of these waxes.
• Whatever wax is used it is preferred that its melting point is between 35° and 70 0 C so that it is readily liquifiable.
• the absorbent for use in the process of the present invention is preferably gelatinised starch, but other absorbents can also be used.
• Preferred are those materials which are conventionally employed as components of detergent powders, for example sodium tripolyphosphate, sodium sulphate, sodium carboxymethyl cellulose and sodium aluminosilicate.
• the apparatus in which the liquifiable mixture of silicone and wax is sprayed onto the absorbent can be any of the apparatus conventionally used for granulation or agglomeration. Examples are the Eirich (registered Trade Mark) pan, the Schugi (registered Trade Mark) mixer, or any one of the numerous fluidised bed apparatus which are available, such as the Anhydro (registered Trade Mark) fluidised bed.
• a typical composition of the granules formed in the process of the invention is: However, considerable variations can be made based on this composition, so that the absorbent can be present in amounts of from 20-80%, the silicone compound in amounts of from 5-40%, the paraffin wax in amounts of from 5-30% and the nonionic surfactant in amounts up to 10%, the percentages being expressed by weight.
• the granules may be incorporated into spray-dried (powdered) detergent compositions or into liquid ones.
• powdered detergent compositions they will be dosed into the powder after spray-drying, along with other materials which are conventionally post-dosed such as sodium perborate and fillers.
• liquids which are structured sometimes called false-body liquids
• the granules can be added to the liquid in the final step of the manufacturing process.
• structured liquids There are two basic types of structured liquids, one in which the structure is imparted by interaction between surfactants and electrolytes, and the other in which it is imparted by means of a colloid such as a clay. Both types are capable of suspending the granules of the invention.
• composition in powdered or in liquid form it will normally contain both an anionic and a nonionic surfactant but may also contain either alone or a soap as the major detergent-active species.
• the powdered compositions will contain a detergency builder and the liquid ones will normally do so, but need not necessarily.
• Other components which will normally be present are corrosion inhibitors, anti-redeposition agents, fluorescers, stabilisers and substantial proportions of water.
• Typical anionic surfactants which may be present in amounts of from about 2 to 35% by weight of the finished compositions are sodium alkylbenzene sulphonates, preferably the C 10 -C 14 alkyl compounds, sodium primary and secondary alkyl sulphates, preferably the C 10 -C 22 alkyl sulphates, sodium olefine sulphonates, preferably the C 10 -C 18 sulphonates and sodium alkane sulphonates. Soaps of fatty acids may also be present, preferably the sodium and potassium salts of C 10 -C 22 fatty acids, both saturated and unsaturated.
• soap is the sole anionic surfactant it may be present in an amount up to about 65% by weight of the finished composition, down to about 2$ by weight when other anionic surfactants are present.
• Typical soaps which can be used are those formed from coconut oil, tallow and natural oils containing high proportions of oleic acid such as sunflower oil.
• Typical nonionic surfactants are ethoxylated primary and secondary alcohols of from 8 to 25 carbon atoms containing from 3 to 25 moles of ethylene oxide per mole of alcohol. These materials may generally be present in an amount of from 1 to 15% by weight, based on the weight of the finished composition.
• Typical detergency builders which can be used are the water-soluble phosphates, carbonates, percarbonates and aluminosilicates, particularly the sodium and potassium salts of these compounds.
• Organic builders may also be used, examples being sodium carboxymethyloxysuccinate, sodium citrate, sodium polyacrylates and sodium nitrilotriacetate. Any of these compounds, or any other builder compound, in any suitable mixture, may be used in amounts of from 5 to 50% by weight of the finished composition.
• gelatinised starch (Amigel 30076 registered Trade Mark, manufactured and sold by Societe des Produits du Mais, of Clarmart, France) was placed in the pan of an Eirich (registered Trade Mark) pan granulator.
• the resultant liquid was then sprayed onto the gelatinised starch in the pan granulator then, 4.8 parts of nonionic surfactant (C 13-18 primary alcohol 8EO) where sprayed onto the granules.
• the following detergent composition was prepared by conventional spray-drying and dry-dosing techniques, the granules of example 1 being added in the dry-dosing step.
• the powder obtained was divided into two batches. The first batch was immediately subjected to the foam assessment test described below. The other batch was stored in unlaminated, sealed cartons at 37°C and 60% relative humidity. The stored batches were then subjected to test after 2 weeks and 4 weeks of storage.
• the suds assessment test is performed by washing a standard load of clean washing in a Brandt 433 (registered Trade Mark) washing machine.
• the washing machine was specially modified to provide a window and the window had an arbitrary scale on it from which suds height could be read.
• the reservoir holding the wash liquor is fitted with a thermometer.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Molecular Biology (AREA)
• Detergent Compositions (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Processes Of Treating Macromolecular Substances (AREA)
• Degasification And Air Bubble Elimination (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

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Cited By (17)

Citations (6)

• 1983
  • 1983-05-09 ZA ZA833292A patent/ZA833292B/xx unknown
  • 1983-05-10 DE DE8383302643T patent/DE3364903D1/de not_active Expired
  • 1983-05-10 AT AT83302643T patent/ATE21115T1/de not_active IP Right Cessation
  • 1983-05-10 EP EP83302643A patent/EP0094250B2/de not_active Expired - Lifetime

Patent Citations (6)

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