Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Patent
1996-03-19
1997-12-30
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
510221, 510228, 510237, 510428, 510433, 510496, 510503, C11D 114, C11D 175, C11D 183
Patent
active
057030367
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to thickened aqueous detergent compositions.
BACKGROUND OF THE INVENTION
Liquid detergent compositions comprising long chain surfactants such as amine oxides are well known in the art. Such compositions are typically those as in U.S. Pat. No. 4,282,109, EP 274 885, EP 233 666, DE 28 37 880 and EP 30 401.
It is desirable that such compositions have good cleaning properties. However, it has been found that long chain amine oxides do not provide the optimum cleaning performance. It is a first object of the present invention to provide cleaning compositions comprising long chain surfactants with improved cleaning.
In response to this object, it has been found that the incorporation of short chain surfactants is beneficial and meets this object thereby enhancing the cleaning performance.
However, it has been observed that the incorporation of short chain surfactants at amounts needed to enhance performance in such compositions results in the decrease of viscosity of the composition. Yet, it is considered essential that the compositions should exhibit a high degree of viscosity so that the compositions adhere to the vertical surfaces and surfaces inclined to the horizontal.
Thus, it is a further object of the present invention to provide a liquid composition which comprises long chain surfactants and short chain surfactants, which retains viscosity.
In response to this object, it has been found that viscosity may be retained even upon the addition of short chain surfactants, by the use of a mixture of amine oxide and alkyl sulphate, more specifically a mixture of a C.sub.12 -C.sub.16 chain amine oxide and a C.sub.12 -C.sub.14 alkyl sulphate.
A further advantage of the present invention is that there is no need for an additional thickening agent.
Thickening compositions comprising long chain surfactants are well known in the art.
U.S. Pat. No. 4,282,109 discloses a thickened bleach composition comprising hypochlorite and a thickening amount of a surfactant blend, comprising amine oxide C.sub.10 -C.sub.18 and alkyl sulphate C.sub.8 -C.sub.12 at a ratio of 3:4 or more.
EP 274 885 discloses thickened bleaching compositions comprising alkali metal hypochlorite and straight chain C.sub.14 amine oxide with a mixture of branched and straight chain C.sub.15 amine oxides. There is no mention of short chain surfactants.
EP 233 666 discloses a process for the manufacture of a thickened bleaching compositions comprising hypochlorite, a hypochlorite-soluble surfactant and an alkali metal salt of a fatty acid. The detergent actives include amine oxides, preferably lauryldimethylamine.
DE 28 37 880 covers bleaching compositions comprising alkali metal hypochlorite and mixtures of branched and linear amine oxides of varying chain length, (C.sub.5 -C.sub.17) for increased viscosity. There is no mention of other long or short chain surfactants.
EP 30 401 covers thickened bleaching compositions comprising hypochlorite and a certain number of product characteristics including pH and viscosity. Mixtures of C.sub.8 -C.sub.18 amine oxides and fatty acids are preferred as thickening agents. No other surfactants are disclosed.
SUMMARY OF THE INVENTION
The compositions of the present invention have a viscosity of from 40 cps to 4000 cps; comprising a viscosity-decreasing short chain surfactant, said surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the chain length of the hydrophobic portion is C.sub.6 to C.sub.10.
The composition also comprises a viscosity restoring long chain surfactant mixture. Said mixture comprises an amine oxide according to the formula R.sub.1 R.sub.2 R.sub.3 NO, wherein R.sub.1 is a linear C.sub.12 to C.sub.16 alkyl group and R.sub.2 and R.sub.3 are independently C.sub.1 to C.sub.3 alkyl groups and an alkali metal alkyl sulphate according to the formula R.sub.4 OSO.sub.3 M, wherein R.sub.4 is a C.sub.12 to C.sub.14 alkyl group and M is an alkali metal. The compositions also preferably comprise hypochlorite.
All ratios, percentages an
REFERENCES:
patent: 3996149 (1976-12-01), Burke, Jr.
patent: 4071463 (1978-01-01), Steinhauer
patent: 4272395 (1981-06-01), Wright
patent: 4282109 (1981-08-01), Citrone et al.
patent: 4839077 (1989-06-01), Cramer et al.
patent: 5055219 (1991-10-01), Smith
patent: 5531915 (1996-07-01), Perkins
patent: 5549842 (1996-08-01), Chang
Aylor Robert B.
Hardee John R.
Lieberman Paul
Reed T. David
The Procter & Gamble & Company
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