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
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
  • C11D17/0013—Liquid compositions with insoluble particles in suspension
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/1233—Carbonates, e.g. calcite or dolomite
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/14—Fillers; Abrasives ; Abrasive compositions; Suspending or absorbing agents not provided for in one single group of C11D3/12; Specific features concerning abrasives, e.g. granulometry or mixtures

Definitions

• the present invention relates to liquid abrasive cleaner compositions comprising particulate abrasive material stably suspended in an aqueous liquid medium.
• Liquid abrasive cleaners have been known in the art for many years. They are widely used in the ordinary household cleaning of hard surfaces as they provide a convenient means for the elimination of stubborn soils, greases, burnt-on materials and stains which are not removed or not completely removed by abrasive-free cleaning products.
• liquid abrasive cleaners have become increasingly more sophisticated, the in-use properties other than straightforward cleaning efficiency becoming relevant factors in the consumer appreciation. Accordingly, the art is aiming at liquid abrasive cleaner products which display a combination of properties such as cleaning efficiency, non-scratching behaviour, rich foaming, a non-gritty creamy appearance, good rinsability, etc.
• liquid abrasive cleaner compositions comprising calcium metasilicate as sole abrasive, or in conjunction with calcium carbonate, which are stated to yield abrasive cleaners of superior cleaning action and reduced abrasion.
• the abrasive material should have a mean particle size in the range of about 5.5 to 16 micrometres and substantially no particles above 40 micrometres.
• liquid scouring cleanser compositions comprising an abrasive powder of mean particle size between 4 and 17.5 micrometres with substantially no particles of size above 75 micrometres.
• An improved soft and smooth consistency is combined with acceptable cleaning performance.
• the present invention provides a liquid abrasive cleaner composition
• a liquid abrasive cleaner composition comprising particulate abrasive material stably suspended in an aqueous liquid medium, the particle distribution of the abrasive material being such that the ratio (classification ratio) between the upper cut-­off particle size and the mean particle size is equal to or below 2.5:1.
• Suitable particle size distributions in accordance with the present invention are highly classified. They have a relatively low classification ratio between the upper cut-off particle size, i.e. the particle size substantially all abrasive particles have sizes below, and the mean particle size which is here to be understood as the size at which 50% by weight of the particles are larger and 50% are smaller. Suitable particle size distributions should have a classification ratio equal to or below 2.5:1. Preferred are classification ratios equal to or below 2.0:1, ratios equal to or below 1.8:1 being preferred most.
• abrasive particle distributions which have cut-offs at both sides of the distribution.
• the classification at the upper side preferably results in particle size distributions substantially having no particles of size above 90 micrometres, preferably lacking any particles of size above 75 micrometres or even above 70 micrometres.
• the classification at the lower side should result in particle size distributions having less than 10% by weight of particles with sizes below 20 micrometres, distributions having less than 10% by weight of particles with sizes below 25 or even 30 micrometres being preferred.
• the full benefits of the present invention are obtained by a mean particle size of above 40 micrometres, in particular within the range of from 40 to 65 micrometres.
• the mean particle size lies within the range of from 45 to 55 micrometres.
• Suitable for use as the abrasive material are both natural and synthetic abrasives, for example dolomite, precipitated calcium carbonate (aragonite), feldspar, alumina, silica abrasives, such as quartz and quartzite; preferably an abrasive material is used with a hardness on Moh's scale of from 1 to 4.
• abrasive material is generally present in an amount of from 1 to 65%, preferably from 2 to 60%, and most preferably from 40 to 55% by weight of the final composition.
• the liquid medium normally comprises an aqueous medium in which an anionic detergent material is present, preferably in combination with a nonionic or zwitterionic detergent material.
• Suitable anionic surfactants are alkali metal or alkanol amine salts of C12-C18 branched or straight chain alkylaryl sulphonates, of C10-C18 alkyl (EO) 1-10 sulphates, of C10-C24 fatty acid soaps etc.
• the amount of anionic surfactant will vary between 0.5 and 15%, preferably between 2 and 10% by weight of the final composition.
• nonionic or zwitterionic detergent material in the aqueous medium in an amount of from 0.3 to 7%, preferably from 0.5 to 5% by weight.
• Suitable examples of nonionic detergents are water-soluble condensation products of ethylene and/or propylene oxide with linear primary or secondary C8-C18 alcohols, with C8-C18 fatty acid amides or fatty acid alkylolamides (both mono- and diamides), with C9-C18 alkyl phenols and so on.
• the alkoxylated C8-C18 fatty acid mono- and dialkylolamides should contain more than one alkylene oxide unit; for example, they should be condensed with e.g.
• alkylene oxide such as ethylene oxide.
• Fatty acid mono- or di-alkylolamides in which the fatty acid radical contains 10-16 carbon atoms are also suitable nonionics, such as for instance coco fatty acid mono- or diethanol amide.
• Suitable zwitterionic detergents are trialkyl amine oxides having one long alkyl chain (C8-C18) and two short (C1-C4) alkyl chains; betaines and sulphobetaines.
• liquid medium should exhibit Bingham plastic characteristics, thus forming a stable suspending medium for the abrasive material.
• surfactants possibly in combination with other surfactants, are described in British patent specifications 1 167 597, 1 181 607, 1 262 280, 1 303 810, 1 308 190 and 1 418 671.
• a liquid abrasive cleanser also comprises an electrolyte or mixture of electrolytes, such as alkalimetal chlorides, -nitrates, -silicates, -borates, -carbonates, -sulphates, -ortho­phosphates, -pyro- and -polyphosphates, -citrates, -nitrilotriacetates and mixtures thereof.
• the level of electrolyte will range from 0 to 25 percent, preferably from 5 to 20 percent by weight of the liquid medium without the abrasive materials.
• Suitable thickening agents for inclusion in the present compositions are natural or synthetic clays selected from the group of expandable layered clays such as the alumino and magnesium silicates. Examples thereof are the smectite clays such as montmorillonite (bentonite), hectorite and saparite, and the attagulgite clays such as those commercially available under the trade-name Attagel®.
• adjuncts for liquid abrasive cleansers may be included, such as colouring agents, perfumes, fluorescers, hydrotropes, soil-suspending agents, bleaching agents, bleach precursors, enzymes, opacifiers, germicides, humectants, etc.
• a fat/flour mixture is applied as a thin layer to large titanium enamel or stainless steel test pieces. This soil is then pyrolysed at 250°C. The test pieces, after ageing for at least 48 hours, are secured by means of 2 clamps onto the "Sheen wet scrub tester". The burnt-on soil is rubbed off using the test product applied via a special cleaning head. The number of rubs taken to clean the test piece is then recorded.
• the fingers can readily feel gritty particles when a cream scourer is rubbed between the thumb and fingers.

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• 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)
• Inorganic Chemistry (AREA)
• Detergent Compositions (AREA)

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Publications (2)

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Cited By (3)

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Citations (4)

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• 1986
  • 1986-04-07 GB GB868608429A patent/GB8608429D0/en active Pending
• 1987
  • 1987-03-23 EP EP87200516A patent/EP0241072A3/de not_active Withdrawn
  • 1987-04-02 ZA ZA872402A patent/ZA872402B/xx unknown
  • 1987-04-03 AU AU71072/87A patent/AU600714B2/en not_active Ceased
  • 1987-04-06 JP JP62084497A patent/JPS62241999A/ja active Pending
  • 1987-04-06 BR BR8701595A patent/BR8701595A/pt unknown

Patent Citations (4)

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