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
  • C11D3/38672—Granulated or coated enzymes
• • 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
  • C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
• • 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
  • C11D1/525—Carboxylic amides (R1-CO-NR2R3), where R1, R2 or R3 contain two or more hydroxy groups per alkyl group, e.g. R3 being a reducing sugar rest

Definitions

• enzyme deactivation occurs in aqueous detergent compositions containing proteolytic enzymes or mixtures of enzymes one of which is proteolytic.
• the present invention provides detergent compositions comprising detergent active compounds which have improved stability upon storage.
• the porous hydrophobic material comprising a detergent active compound being absorbed into said hydrophobic material can be used to store said detergent active compounds in the form of non-dusting granulates.
• the present invention provides a detergent additive comprising a water-soluble or water-dispersible detergent active compound characterized in that a mixture of said compound with a surfactant is absorbed into a porous hydrophobic material, said porous material being coated with a hydrophobic material.
• the present invention relates to a stabilization system for detergent active compounds having improved storage stability within a full detergent composition.
• stabilization refers to protecting the detergent active compounds by isolating and protecting them from their hostile environment upon storage but releasing said compounds during washing conditions.
• the detergent active compounds are isolated from their hostile environment by reversibly absorbing said compounds into a porous hydrophobic material.
• porous hydrophobic material serves as a "cage" wherein the detergent active compound is enclosed.
• the pores of the detergent additive filled hydrophobic porous material are sealed by dispersing said porous material into a hydrophobic liquid.
• the hydrophobic liquid acts as a "shell", thereby protecting the detergent additive from its environment.
• the protected detergent active compound according to the present invention can be readily released under washing conditions without losing the ability to perform its normal function.
• the present invention provides a detergent additive comprising a hydrophillic detergent active compound characterized in that said compound is mixed with a surfactant before absorption into a porous hydrophobic material, said porous material subsequently being coated with a hydrophobic material.
• the present invention also provides a process whereby a detergent active compound is reversibly absorbed into particles of a porous hydrophobic material, said particles subsequently being dispersed into a hydrophobic liquid.
• the detergent active solution is reversibly absorbed into particles of a porous hydrophobic material, said particles subsequently being dispersed into a hydrophobic liquid.
• a detergent active compound can be significantly impaired in detergent compositions by interaction between the active compound and other coingredients of the detergent composition.
• detergency enzymes can be affected by interaction with other enzymes, bleaches, acids and bases.
• Perfumes and bleaches can be effected by bleach activators.
• Cationic fabric conditioners can be effected by interaction with anionic surfactants ; organic bleaches can be effected by moisture, metal contamination ; brighteners/fluorescers can be affected with bleaches.
• the detergent active compounds suitable for the present invention include enzymes, bleaches, bleach activators, bleach catalysts, perfumes, photoactivators, dyes, brighteners/ fluorescers, through the wash sanitizers, fabric softening or conditioning agents, hydrolysable surfactants, and other detergent active compounds which are water-soluble or water- dispersible and mixtures thereof.
• a preferred class of a detergent active compound is a detergency enzyme.
• enzymes suitable for the present invention are enzymes which are active in the removal of soils or stains such as protease, lipase, amylase, carboxylase, cellulase, oxidase, peroxidase or mixtures thereof.
• the enzyme may be present in the form of an enzyme solution, e.g. in water or a lower water miscible, mono-,di- or polyhydric alcohol such as propylene glycol and optionally containing enzyme stabilizers such as is known in the art.
• Enzyme stabilizers which may be present include lower alcohols, e.g. glycerol, lower mono- or di- carboxylic acid and their salts, especially formates and oxidates, borates and calcium salts.
• Suitable detergent active compounds can also be represented by bleaches, bleach activator and bleach catalysts.
• Suitable inorganic bleaches include perborates, percarbonates.
• Suitable organic bleaches include peroxyacids known in art.
• Suitable bleach precursors are peracetic acid bleach precursors such as tetraacetylethylenediamine, triacetin, and acethyl trimethyl citrate.
• the detergent active does not spontaneously wet the surfaces of the hydrophobic material. It has been found that by adding surfactant the detergent active solution is readily absorbed into the pores of the hydrophobic material.
• the surfactant suitable for the present invention should be compatible with the detergent active compound.
• One class of nonionic surfactants useful in the present invention are condensates of ethylene oxide with a hydrophobic moiety to provide a surfactant having an average hydrophilic- lipophilic balance (HLB) in the range from 8 to 17, preferably from 9.5 to 13.5, more preferably from 10 to 12.5.
• HLB hydrophilic- lipophilic balance
• the hydrophobic (lipophilic) moiety may be aliphatic or aromatic in nature and the length of the polyoxyethylene group which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophilic and hydrophobic elements.
• Especially preferred nonionic surfactants of this type are the c 9"" c 15 primary alcohol ethoxylates containing 3-8 moles of ethylene oxide per mole of alcohol, particularly the C 14 -C 15 primary alcohols containing 6-8 moles of ethylene oxide per mole of alcohol and the C 12 ⁇ 1 4 primary alcohols containing 3-5 moles of ethylene oxide per mole of alcohol.
• Anionic or cationic surfactants are less likely to be used. However, if the absorbed detergent active is unaffected by these surfactants they can alternatively be used.
• the level of surfactant used in the present invention should be such to ensure sufficient wetting of the hydrophobic material. At high levels of surfactant, agglomerates can be formed. Therefore, the level of surfactant that can be used should be such to maintain a free flowing hydrophobic powder.
• the active-filled porous hydrophobic material may contain additional ingredients, which can be premixed with the surfactant before they are absorbed into the porous hydrophobic material.
• additional ingredients include other active compounds such as perfumes, brighteners, bleaches, softeners and other conventional optional ingredients such as buffers, electrolytes, etc. as far as they are chemically compatible with the surfactant active solution.
• the detergent active compound is an enzyme
• an average pore diameter of the hydrophobic material of 500 angstroms or higher is preferred.
• the preferred hydrophobic material that then can be used is silica.
• the average pore diameter of the currently used silica is 1000 A while the absorbed enzyme molecules have diameters in the range of 50 to 150 A.
• the silica particles can be rendered hyrophobic by treating them with dialkylsilane groups and/or trialkylsilane groups either bonded directly onto the silica or by means of silicone resin.
• the silica is further characterized by a high absorption value. The absorption can be expressed as Dibutylphthalate (DBP) number.
• DBP Dibutylphthalate
• Porous silica suitable for the present invention is available under the trade name Sipernat (R) from Degussa.
• the hydrophobic coating material provides a protective coating for the active-filled porous hydrophobic materials herein.
• Coating the pores of the hydrophobic material isolates the detergent active compound from environments which causes the degradation of the active compounds.
• the active compounds remain in their stabilized material environment without interacting with other potentially harmful detergent ingredients or the environment is protected from the detergent active compound itself.
• Such a polymer may be an organo polysiloxane oil, e.g. a polydi(alkyl) siloxane, especially a polydi(methyl) siloxane.
• organo polysiloxane oil e.g. a polydi(alkyl) siloxane, especially a polydi(methyl) siloxane.
• hydrophobic silicone oils which have been proposed for use as antifoam in liquid detergents.
• the silicone oil to enzyme-filled silica ratio should be at least 1.5:1.
• R 1 is H, or R 1 is C ⁇ _4 hydrocarbyl, 2-hydroxy ethyl, 2- hydroxy propyl or a mixture thereof
• R 2 is C5_ 3 i hydrocarbyl
• Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative thereof.
• R 1 is methyl
• R 2 is a straight Cn_i 5 alkyl or alkenyl chain such as coconut alkyl or mixtures thereof
• Z is derived from a reducing sugar such as glucose, fructose, maltose, lactose, in a reductive amination reaction.
• SKS-6 is a crystalline layered silicate consisting of sodium silicate (Na2Si 2 >5) .
• Suitable water-soluble organic salts are the homo- or co- polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms.
• the surfactant containing enzyme solution is then combined with porous hydrophobic silica (currently used Sipernat D10 ex Degussa) at ratio 2.5 times the silica's weight
• Comparative depilling assessment was done by expert judges using a reference, the reference being worn cotton fabrics washed in the presence of fresh added cellulase and no Savinase.

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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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Citations (7)

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• 1992
  • 1992-08-18 EP EP19920202534 patent/EP0583512B1/en not_active Expired - Lifetime
  • 1992-08-18 ES ES92202534T patent/ES2117030T3/es not_active Expired - Lifetime
  • 1992-08-18 DE DE1992625968 patent/DE69225968T2/de not_active Expired - Fee Related
• 1993
  • 1993-07-28 AU AU47896/93A patent/AU4789693A/en not_active Abandoned
  • 1993-07-28 JP JP6506286A patent/JPH08500144A/ja active Pending
  • 1993-07-28 WO PCT/US1993/007088 patent/WO1994004267A1/en active Application Filing
  • 1993-08-12 TR TR00719/93A patent/TR27709A/xx unknown
  • 1993-08-13 CN CN93117787A patent/CN1039430C/zh not_active Expired - Fee Related

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