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
  • C11D3/16—Organic compounds
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
  • C11D3/38663—Stabilised liquid enzyme 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
  • C11D10/00—Compositions of detergents, not provided for by one single preceding group
  • C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
• • 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
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
• • 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
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols

Definitions

• Especial suitable is the use of a combination of propylene glycol, boron compound and glycerol in weight ratios of from 5 to 20 : 1 : 1 to 5, more preferred from 7 to 15 : 1 : 2 to 4.
• the enzyme stability in liquid compositions comprising this ternary combination of propylene glycol, glycerol and boron compounds has been found to be surprisingly good.
• 'soap' is meant an alkali metal soap of a long chain mono- or dicarboxylic acid, for example one containing 12 to 18 carbon atoms.
• Typical acids of this kind are oleic acid, ricinoleic acid and dodecenyl succinic acid, fatty acids derived from castor oil, rapeseed oil, groundnut oil, coconut oil, palmkernel oil or mixtures thereof.
• the sodium or potassium soaps of these acids can be used, including mixtures of both forms.
• the preferred synthetic surfactants which can be used are synthetic anionic compounds. These are usually water-soluble alkali metal salts of organic sulphates and sulphonates having alkyl radicals containing from about 8 to about 22 carbon atoms, the term alkyl being used to include the alkyl portion of higher acyl radicals.
• suitable, synthetic, anionic detergent compounds are sodium and potassium primary or secondary alkyl sulphates, especially those obtained by sulphating the higher (C8-C18) alcohols produced by reducing the glycerides of tallow or coconut oil; sodium and potassium alkyl (C9-C20) benzene sulphonates, particularly sodium linear secondary alkyl (C10-C15) benzene sulphonates; sodium alkyl glyceryl ether sulphates, especially those ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum; sodium coconut oil fatty acid monoglyceride sulphates and sulphonates; sodium and potassium salts of sulphuric acid esters of higher (C9-C18) fatty alcohol-alkylene oxide, particularly ethylene oxide, reaction products; the reaction products of fatty acids such as coconut fatty acids esterified with isethionic acid neutralized with sodium hydroxide; primary or secondary alkane monosulphon
• Such solid particles may be added as such to the composition, preferably however, they are formed by in situ crystallisation.
• perborate bleach particles this preferably involves the in situ crystallization of a perborate tetrahydrate such as for instance disclosed in EP 294 904 (Procter and Gamble).
• EP 294 904 Procter and Gamble
• Other methods for effecting the presence of bleach in solid form are described in EP 293 040 (Procter and Gamble); these involve the addition of one or more water-miscible solvents.
• the liquid detergent compositions should be alkaline, and it is preferred that they should provide a pH within the range of about 8.5 to 12, preferably about 9 to about 11, when used in aqueous solutions of the composition at the recommended concentration.
• the undiluted liquid composition should preferably be of a pH between 7 and 12.5, for example about pH 8.5 to about 12.5. It should be noted that an excessively high pH, e.g. over about pH 13, is less desirable for domestic safety. If a bleach such as hydrogen peroxide is present in the liquid composition, then the pH is generally from 7.5 to 10.5, preferably 8 to 10, and especially 8.5 to 10, to ensure the combined effect of good detergency and good physical and chemical stability.
• the ingredients in any such highly alkaline detergent composition should, of course, be chosen for alkaline stability, especially for pH-sensitive materials such as enzymes, and a particularly suitable proteolytic enzyme. The pH may be adjusted by addition of a suitable alkaline material.
• compositions of the invention may be prepared in any suitable way; a preferred method is, however, dissolving the alkali (for the in situ neutralization of anionic surfactant and fatty acids) in water of room temperature, adding any acidic anionic surfactant and the propylene glycol, and heating the mix to 55°C under agitation. Subsequently, a pre-mix consisting of any nonionic active, fatty acid and, if required, the lather booster with a temperature above the melting temperature of the components, should be dissolved in the mix.
• the builder and buffer salts should preferably be added as the final components, as well as the bleach e.g. hydrogen peroxide, if present.

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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)
• Detergent Compositions (AREA)

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Cited By (7)

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Citations (3)

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• 1988
  • 1988-05-06 GB GB888810822A patent/GB8810822D0/en active Pending
• 1989
  • 1989-04-20 EP EP89201025A patent/EP0344828A3/de not_active Withdrawn
  • 1989-05-01 JP JP1112805A patent/JP2672642B2/ja not_active Expired - Lifetime
  • 1989-05-04 AU AU33987/89A patent/AU618348B2/en not_active Ceased
  • 1989-05-05 ZA ZA893329A patent/ZA893329B/xx unknown
  • 1989-05-05 BR BR898902113A patent/BR8902113A/pt not_active IP Right Cessation

Patent Citations (3)

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