Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate
2000-08-16
2001-10-16
Kopec, Mark (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
C510S276000, C510S287000, C510S300000, C510S320000, C510S329000, C510S330000, C510S338000, C510S339000, C510S345000, C510S407000, C510S420000, C510S460000, C510S530000
Reexamination Certificate
active
06303563
ABSTRACT:
The present invention relates to liquid detergent and foam compositions, such as those used for washing and treating clothes.
Liquid laundry detergents comprising a surfactant system and enzymes have been sold commercially since the early 1980's. Up to now most of these liquid laundry detergents have included a substantial amount of anionic surfactant in the surfactant system. Cationic surfactants are usually not used in liquid laundry detergents because they complex with the anionic surfactants, and the surfactant system becomes less effective. Furthermore cationic surfactants which are selected because they are more biodegradable are generally considered to be unsuitable for use in liquid laundry detergents because the biodegradable cationic surfactants are somewhat hydrolytically unstable at the slightly alkaline pH of conventional liquid laundry detergents
In the technical field of rinse added fabric softeners there are some disclosures of quaternary esters in compositions which also comprise certain enzymes. Conventional rinse added fabric softeners are essentially free of anionic surfactants, and so the complexation problem does not arise. WO9113136, published on Sep. 5, 1991 discloses combinations of cationic surfactants with enzymes at pH7. WO9505442, published on Feb. 23, 1995 and WO9529980, published on Nov. 9, 1995 disclose combinations of ester quats with cellulase at pH of 2 to 4.5 (e.g. the '442 application at page 6, line 1) including various chelants to stabilise the enzyme.
However these rinse added fabric softeners are usually formulated at acidic pH.
The object of the present invention is to provide a liquid detergent composition comprising enzymes and a boron derived enzyme stabilising agent which can be used as a cleaning and softening composition in domestic laundry processes. The liquid detergent can have a wide range of viscosity, and can also be in the form of a gel or paste.
SUMMARY OF THE INVENTION
The object of the invention is achieved by a composition which further comprises diester or diamide quaternary ammonium compound, preferably a diester quaternary ammonium compound. Preferably the composition has a pH which is between 7 and 10, more preferably between 7.5 and 8.5 when diluted to a 1% solution in distilled water.
Whilst the composition may be used directly in the form of a liquid, or may be predissolved in water, in a preferred execution of the present invention the composition is used in the form of a foam.
It is preferred that the liquid detergent composition or the foam composition comprises less than 25% by weight of water, more preferably less than 15% by weight of water, optionally with other solvents, such as organic solvents.
DETAILED DESCRIPTION OF THE INVENTION
(1) Preferred quaternary ammonium compound have the formula
or the formula:
wherein Q is a functional unit having the formula:
each R unit is independently hydrogen, C
1
-C
6
alkyl, C
1
-C
6
hydroxyalkyl, and mixtures thereof, preferably methyl or hydroxy alkyl; each R
1
unit is independently linear or branched C
11
-C
22
alkyl, linear or branched C
11
-C
22
alkenyl, and mixtures thereof, R
2
is hydrogen, C
1
-C
4
alkyl, C
1
-C
4
hydroxyalkyl, and mixtures thereof; X is an anion which is compatible with compounds and adjunct ingredients; the index m is from 1 to 4, preferably 2; the index n is from 1 to 4, preferably 2.
An example of a preferred compound is a mixture of quaternized amines having the formula:
wherein R
2
is preferably methyl; R
1
is a linear or branched alkyl or alkenyl chain comprising at least 11 atoms, preferably at least 15 atoms. In the above fabric softener example, the unit −R
1
represents a fatty alkyl or alkenyl unit which is typically derived from a triglyceride source. The triglyceride source is preferably derived from tallow, partially hydrogenated tallow, lard, partially hydrogenated lard, vegetable oils and/or partially hydrogenated vegetable oils, such as, canola oil, safflower oil, peanut oil, sunflower oil, corn oil, soybean oil, tall oil, rice bran oil, etc. and mixtures of these oils.
The preferred compound of the present invention are the Diester and/or Diamide Quaternary Ammonium (DEQA) compounds, the diesters and diamides having the formula:
wherein R, R
1
, X, and n are the same as defined herein above for formulas (1) and (2), and Q has the formula:
These preferred compounds are formed from the reaction of an amine with a fatty acyl unit to form an amine intermediate having the formula:
wherein R is preferably methyl, Q and R
1
are as defined herein before; followed by quaternization to the final softener active.
Non-limiting examples of preferred amines which are used to form the DEQA compounds according to the present invention include methyl bis(2-hydroxyethyl)amine having the formula:
methyl bis(2-hydroxypropyl)amine having the formula:
methyl (3-aminopropyl) (2-hydroxyethyl)amine having the formula:
methyl bis(2-aminoethyl)amine having the formula:
triethanol amine having the formula:
di(2-aminoethyl) ethanolamine having the formula:
The counterion, X
(−)
above, can be any softener-compatible anion, preferably the anion of a strong acid, for example, chloride, bromide, methylsulfate, ethylsulfate, sulfate, nitrate and the like, more preferably chloride or methyl sulfate. The anion can also, but less preferably, carry a double charge in which case X
(−)
represents half a group.
Tallow and canola oil are convenient and inexpensive sources of fatty acyl units which are suitable for use in the present invention as R
1
units. The following are non-limiting examples of quaternary ammonium compounds suitable for use in the compositions of the present invention. The term “tallowyl” as used herein below indicates the R
1
unit is derived from a tallow triglyceride source and is a mixture of fatty alkyl or alkenyl units. Likewise, the use of the term canolyl refers to a mixture of fatty alkyl or alkenyl units derived from canola oil.
Fabric Softener Actives
N,N-di(tallowyl-oxy-2-oxo-ethyl)-N-methyl, N-(2-hydroxyethyl) ammonium chloride;
N,N-di(canolyl-oxy-2-oxo-ethyl)-N-methyl, N-(2-hydroxyethyl) ammonium chloride;
N,N-di(tallowyloxy-2-oxo-ethyl)-N,N-dimethyl ammonium chloride;
N,N-di(canolyloxy-2-oxo-ethyl)-N,N-dimethyl ammonium chloride
N,N,N-tri(tallowyl-oxy-2-oxo-ethyl)-N-methyl ammonium chloride;
N,N,N-tri(canolyl-oxy-2-oxo-ethyl)-N-methyl ammonium chloride;
N-(tallowyloxy-2-oxo-ethyl)-N-(tallowyl)-N,N-dimethyl ammonium chloride;
N-(canolyloxy-2-oxo-ethyl)-N-(canolyl)-N,N-dimethyl ammonium chloride; 1.2-di(tallowyloxy-oxo)-3-N,N,N-trimethylammoniopropane chloride; and
1,2-di(canolyloxy-oxo)-3-N,N,N-trimethylammoniopropane chloride;
N-(canoyloxy-2-oxo-ethyl), N-methyl, N,N-di(2-hydroxyethyl) ammonium chloride
N-(tallowyloxy-2-oxo-ethyl), N-methyl, N,N-di(2-hydroxyethyl) ammonium chloride
and mixtures of the above actives.
Other examples of quaternary ammonium compounds are methylbis(tallowamido-ethyl)(2-hydroxyethyl)ammonium methylsulfate and methylbis(hydrogenated tallowamidoethyl)(2-hydroxyethyl)ammonium methylsulfate; these materials are available from Witco Chemical Company under the trade names Varisoft® 222 and Varisoft®110, respectively.
Particularly preferred is N,N-di(canolyl-oxy-2-oxo-ethyl)-N-methyl, N-(2-hydroxyethyl) ammonium chloride.
The level of unsaturation contained within the tallow, canola, or other fatty acyl unit chain can be measured by the Iodine Value (IV) of the corresponding fatty acid, which in the present case should preferably be in the range of from 5 to 100 with two categories of compounds being distinguished, having a IV below or above 25.
Indeed, for compounds having the formula:
derived from tallow fatty acids, when the Iodine Value is from 5 to 25, preferably 15 to 20, it has been found that a cis/trans isomer weight ratio greater than about 30/70, preferably greater than about 50/50 and more preferably greater than about 70/30 provides optimal concentration formulations.
For compounds of this type made from tallow fatty acids having a Iodine V
de Buzzaccarini Francesco
Guichard Bertrand
Hoerner Thomas Wilhelm
Boyer Charles
Cook C. Brant
Kopec Mark
Miller Steven W.
The Procter & Gamble & Company
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