Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1999-12-15
2002-01-29
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S424000, C510S426000, C510S428000
Reexamination Certificate
active
06342473
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to hard surface cleaning products comprising particular types of improved alkylbenzene sulfonate surfactant mixtures adapted for use by controlling compositional parameters, especially a 2/3-phenyl index and a 2-methyl-2-phenyl index.
BACKGROUND OF THE INVENTION
The developer and formulator of surfactants for hard surface cleaning must consider a wide variety of possibilities with limited (sometimes inconsistent) information, and then strive to provide overall improvements in one or more of a whole array of criteria, including performance in the presence of free calcium in complex mixtures of surfactants and polymers, e.g. cationic polymers, formulation changes, enzymes, various changes in consumer habits and practices, and the need for biodegradability.
Further, hard surface cleaning should employ materials that enhance the tolerance of the system to hardness, especially to avoid the precipitation of the calcium salts of anionic surfactants. Precipitation of the calcium salts of anionic surfactants is known to cause unsightly deposits on hard surfaces, especially dark hard surfaces. In addition, precipitation of surfactants can lead to losses in performance as a result of the lower level of available cleaning agent. In the context provided by these preliminary remarks, the development of improved alkylbenzene sulfonates for use in hard surface cleaning compositions is clearly a complex challenge. The present invention relates to improvements in such surfactant compositions.
It is an aspect of the present invention to provide mixtures of the modified alkylbenzene sulfonate surfactant mixtures which are formulatable to provide cleaning compositions having one or more advantages, including greater product stability at low temperatures, increased resistance to water hardness, greater efficacy in surfactant systems, filming and streaking, improved removal of greasy or particulate body soils, and the like.
BACKGROUND ART
U.S. Pat. Nos. 5,659,099, 5,393,718, 5,256,392, 5,227,558, 5,139,759, 5,164,169, 5,116,794, 4,840,929, 5,744,673, 5,522,984, 5,811,623, 5,777,187, WO 9,729,064, WO 9,747573, WO 9,729,063, U.S. Pat. Nos. 5,026,933; 4,990,718; 4,301,316; 4,301,317; 4,855,527; 4,870,038; 2,477,382; EP 466,558, Jan. 15, 1992; EP 469,940, 2/5/92; FR 2,697,246, Apr. 29, 1994; SU 793,972, Jan. 7, 1981; U.S. Pat Nos. 2,564,072; 3,196,174; 3,238,249; 3,355,484; 3,442,964; 3,492,364; 4,959,491; WO 88/07030, Sep. 25, 1990; U.S Pat. Nos. 4,962,256, 5,196,624; 5,196,625; EP 364,012 B, Feb. 15, 1990; U.S. Pat. Nos. 3,312,745; 3,341,614; 3,442,965; 3,674,885; 4,447,664; 4,533,651; 4,587,374; 4,996,386; 5,210,060; 5,510,306; WO 95/17961, Jul. 6, 1995; WO 95/18084; U.S. Pat. Nos. 5,510,306; 5,087,788; 4,301,316; 4,301,317; 4,855,527; 4,870,038; 5,026,933; 5,625,105 and 4,973,788. See Vol 56 in “Surfactant Science” series, Marcel Dekker, New York, 1996, including in particular Chapter 2 entitled “Alkylarylsulfonates: History, Manufacture, Analysis and Environmental Properties”, pages 39-108, “Surfactant Science” series, Vol 73, Marcel Dekker, New York, 1998 and “Surfactant Science” series, Vol 40, Marcel Dekker, New York, 1992. See also copending U.S. Patent applications No. 60/053,319 filed on Jul. 21, 1997, No. 60/053,318, filed on Jul. 21, 1997, No. 60/053,321, filed on Jul. 21, 1997, No. 60/053,209, filed on Jul. 21, 1997, No. 60/053,328, filed on Jul. 21, 1997, No. 60/053,186, filed on Jul. 21, 1997 and the art cited therein. Documents referenced herein are incorporated in their entirety.
SUMMARY OF THE INVENTION
The present invention provides a hard surface cleaning compositions comprising a modified alkylbenzene sulfonate surfactant mixtures and a conventional surface cleansing additive.
Specifically, the first embodiment of the present invention comprises a hard surface cleaning composition comprising:
(i) from about 0.01% to about 95% by weight of composition of a modified alkylbenzene sulfonate surfactant mixture comprising:
(a) from about 15% to about 99% by weight of surfactant mixture, a mixture of branched alkylbenzene sulfonates having formula (I):
wherein L is an acyclic aliphatic moiety consisting of carbon and hydrogen, said L having two methyl termini and said L having no substituents other than A, R
1
and R
2
; and wherein said mixture of branched alkylbenzene sulfonates contains two or more of said branched alkylbenzene sulfonates differing in molecular weight of the anion of said formula (I) and wherein said mixture of branched alkylbenzene sulfonates has
a sum of carbon atoms in R
1
, L and R
2
of from 9 to 15;
an average aliphatic carbon content of from about 10.0 to about 14.0 carbon atoms; M is a cation or cation mixture having a valence q; a and b are integers selected such that said branched alkylbenzene sulfonates are electroneutral; R
1
is C
1
-C
3
alkyl; R
2
is selected from H and C
1
-C
3
alkyl; A is a benzene moiety; and
(b) from about 1% to about 85% by weight of surfactant mixture, of a mixture of nonbranched alkylbenzene sulfonates having formula (II):
wherein a, b, M, A and q are as defined hereinbefore and Y is an unsubstituted linear aliphatic moiety consisting of carbon and hydrogen having two methyl termini, and wherein said Y has a sum of carbon atoms of from 9 to 15, preferably from 10 to 14, and said Y has an average aliphatic carbon content of from about 10.0 to about 14.0; and
wherein said modified alkylbenzene sulfonate surfactant mixture is further characterized by a 2/3-phenyl index of from about 160 to about 275;
(ii) from about 0.001% to 99.9% by weight of a conventional surface cleansing additive;
wherein said composition is further characterized by a 2/3-phenyl index of from about 160 to about 275.
Specifically, the second embodiment of the present invention comprises a hard surface cleaning composition comprising:
(i) a modified alkylbenzene sulfonate surfactant mixture comprising the product of a process comprising the steps of:
(I) alkylating benzene with an alkylating mixture in the presence of a zeolite beta catalyst;
(II) sulfonating the product of (I); and
(III) neutralizing the product of (II);
wherein said alkylating mixture comprises:
(a) from about 1% to about 99.9%, by weight of alkylating mixture of branched C
9
-C
20
monoolefins, said branched monoolefins having structures identical with those of the branched monoolefins formed by dehydrogenating branched paraffins of formula R
1
LR
2
wherein L is an acyclic aliphatic moiety consisting of carbon and hydrogen and containing two terminal methyls; R
1
is C
1
to C
3
alkyl; and R
2
is selected from H and C
1
to C
3
alkyl; and
(b) from about 0.1% to about 85%, by weight of alkylating mixture of C
9
-C
20
linear aliphatic olefins;
wherein said alkylating mixture contains said branched C
9
-C
20
monoolefins having at least two different carbon numbers in said C
9
-C
20
range, and has a mean carbon content of from about 9.0 to about 15.0 carbon atoms; and wherein said components (a) and (b) are at a weight ratio of at least about 15:85;
(ii) from about 0.001% to 99.9% by weight of a conventional surface cleansing additive,
wherein said composition is further characterized by a 2/3-phenyl index of from about 160 to about 275.
Specifically, the third embodiment of the present invention comprises a hard surface cleaning composition comprising:
(i) a modified alkylbenzene sulfonate surfactant mixture consisting essentially of the product of a process comprising the steps, in sequence, of:
(I) alkylating benzene with an alkylating mixture in the presence of a zeolite beta catalyst;
(II) sulfonating the product of (I); and
(III) neutralizing the product of (II);
wherein said alkylating mixture comprises:
(a) from about 1% to about 99.9%, by weight of alkylating mixture of a branched alkylating agent selected from the group consisting of:
(A) C
9
-C
20
internal monoolefins R
1
LR
2
wherein L is an acyclic olefinic moiety consisting of carbon and hydrogen and containing two terminal methyls;
(B) C
9
-C
20
alpha monoolefi
Burckett-St. Laurent James Charles Theophile Roger
Cripe Thomas Anthony
Kott Kevin Lee
Morelli Joseph Paul
Scheibel Jeffrey John
Cook C. B.
Ogden Necholus
Robinson I. S.
The Procter & Gamble & Company
Zerby K. W.
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