Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Patent
1998-07-29
2000-02-01
Gupta, Yogendra
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
510277, 510283, 510284, 510311, 510313, 510337, 510338, 510340, 510342, 510357, 510356, 510376, 510407, 510417, 510421, 510423, 510424, 510426, 510427, 510432, C11D 172, C11D 183, C11D 3395, C11D 343
Patent
active
060203005
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to compositions for treating stains on laundry items. Laundry items can be treated either before or after a conventional laundering process by application of the composition in the region of the stain so that the stain is at least partially released and removal of the stain is made easier.
Emulsions of solvent-aqueous systems are known to be effective as spot pretreating compositions on both hydrophobic and hydrophilic stains.
GB-A-2 194 547, published on 9th Mar. 1988, discloses mixtures of n-dodecane with both short-chain (Neodol 91-6) and long chain (Neodol 45-1) nonionics. The compositions are in the form of liquid solutions; water-in-oil or oil-in-water microemulsions, or gels. However this application does not disclose compositions which comprise bleach activator material.
The present invention relates to a cleaning composition which is an oil-in-water or water-in-oil emulsion, or a solution comprising non-aqueous hydrophobic solvent; and anionic or nonionic surfactant.
It is the objective of the present invention to improve the removal of bleachable stains through the application of the composition of the present invention and the application of a bleaching compound, preferably a peroxide compound.
SUMMARY OF THE INVENTION
The objective of the present invention is achieved by providing a cleaning composition which further comprises a bleach activator so that cleaning performance for bleachable stains is enhanced. Preferably the bleach activator is at a level of from 0.1% to 10% by weight of the cleaning composition. Preferably water is at a level of from 5% to 95% by weight of the composition.
The invention also relates to a method for treating a spot or stain on a textile fabric using the cleaning compositions of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Hydrophobic solvents are an essential feature of the compostions of the present invention. Preferred hydrophobic solvents are defined in terms of Hansen parameters. A hydrophobic solvent as defined herein is considered to be a solvent having Hansen hydrogen bonding cohesion parameter dH below 18 (Joule/cm.sup.3).sup.0.5. Preferred hydrophobic solvents have a Hansen hydrogen bonding cohesion parameter dH below 12 (Joule/cm.sup.3).sup.0.5 and a Hansen polar parameter dP below 8 (Joule/cm.sup.3).sup.0.5.
Preferred solvents for use comprise mixtures of hydrocarbons with a flash point no lower than 70.degree. C., an initial boiling point no lower than 1300.degree. C., preferably no lower than 145.degree. C. and a solidification point not above 20.degree. C. and aliphatic fatty acid esters. More preferred solvents would be alkanes or alkenes with a chain length above C7, and particularly alkanes and alkenes with an average of C8 to C20 atoms. Particularly preferred hydrophobic solvents are deodorised kerosine; solvent naphta; chlorinated hydrocarbons; and terpenes. Even more preferred are paraffins; isoparaffins; naphthenes; aromatics; olefins; 1,1,1-trichloroethane; perchloroethylene; methylene chloride; Shellsol SS.RTM. mixture (C8-C11 isoparaffin+5% aliphatic C7 ester); D-Limonene; and Glidsafe.RTM. supplied by Glidsol. Solvents are used in the detergent compositions of the present invention preferably at a level of from 3% to 90%, more preferably from 4% to 45%, and most preferably from 5% to 25% by weight of the detergent composition.
In a preferred embodiment, the solvent comprises hydrocarbons with a flash point of not less than 70.degree. C., an initial boiling point of greater than 145.degree. C., and a solidification point of less than 20.degree. C. The solvent is selected from the group consisting of C.sub.10 -C.sub.18 linear or branched alkanes, terpene or mixtures thereof.
Other solvents having a Hansen parameter of dH less than 18 (Joule/cm.sup.3).sup.0.5 include glycol ethers, more preferably glycol ethers based upon ethylene oxide, propylene oxide, or mixtures thereof. Particularly preferred are ethylene glycol monoethyl ether; Propylene glycol monomethyl ether; 2-butoxy ethanol; butyl diethy
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Tcheou Eric
Vega Jose Luis
Delcotto Gregory R.
Gupta Yogendra
Khosla Pankaj M.
Rasser Jacobus C.
The Procter & Gamble & Company
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