Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
2002-03-21
2002-10-15
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S434000, C510S475000, C510S476000, C510S499000
Reexamination Certificate
active
06465412
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an antimicrobial cleaning composition for cleaning surfaces which provides a lasting antibacterial protection on the surface being cleaned, wherein the composition includes a polyethylene oxide polycarboxylate copolymer, polyhexamethylene biguanide hydrochloride, optionally, a surfactant and water.
BACKGROUND OF THE INVENTION
Poly(hexamethylene biguanide)hydrochloride has been used in the food industry as an antibacterial solution for equipment disinfection but these solutions exhibit poor substantivity.
Numerous cleaning compositions have been disclosed in various patents. However, a major problem with these cleaning compositions is that bacteria is not effectively killed on the surface being treated and no protection is provided on the surface against the future growth of bacteria.
Poly(hexamethylene biguanide)hydrochloride has been used in combination with a cationic surfactant such as didecyl dimethyl ammonium chloride in laundry compositions but the substantivity of these laundry compositions is inferior.
Patent applications WO99/40791 and EPO891712A1 comprises a substantive antibacterial solution containing silver ions, poly(hexamethylene biguanide)hydrochloride which is crosslinked by sodium lauryl sulfate.
Avecia Limited of England also provides poly(hexamethylene biguanide)stearate for soap bars.
EP-0875554 teaches the use of an acid-stable polymer selected from the group consisting of a polycarboxylate, a sulphonated polystyrene polymer, a vinylpyrrolidone homo/copolymer, a polyalkoxylene glycol, and mixture thereof, in a liquid acidic composition having a pH below 5. Said acidic compositions are suitable for removing limescale-containing stains from a hard-surface.
EP-0983294 describes a liquid composition having a pH of from 7 to 14 for cleaning hard surfaces, comprising a homo or copolymer of vinylpyrrolidone and a polysaccharide polymer. However, no liquid neutral pH compositions as described in the present invention comprising a polyalkylene oxide polycarboxylate copolymer are disclosed therein.
The exploitation of interpolyelectrolyte reaction (PHMB with polyacrylic acid) has already been exploited to prepare antimicrobial fibres, but in this case the anionic polymer was chemically grafted on the cellulose (Virnik A. D., Penenzhik M. A., Grishin M. A., Rishkina I. S., Zezin A. B., Rogacheva V. B. 1994. Interpolyelectrolyte reactions between polyhexamethylene guanidine and polyacrylic acid grafted on cellulose: a new method for the preparation of antimicrobial fibrous material. Cellulose Chem. Technol. 28, 11-19).
SUMMARY OF THE INVENTION
The present invention relates to an antimicrobial cleaning composition having improved substantivity which comprises a polyhexamethylene biguanide hydrochloride, a polyethylene oxide polycarboxylate copolymer, optionally a surfactant selected from the group consisting of anionic, zwitterionic surfactants and nonionic surfactants and mixtures thereof, and water, wherein the composition does not contain silicon containing polymer, amino containing polymers, copolymers of polyvinyl pyrrolidone or polyvinyl pyrridine N-oxide polymers.
It is an object of the instant invention to provide an antibacterial cleaning composition, wherein the polymer links with the polyhexamethylene biguanide hydrochloride and the surface to improve the deposition and the resistance to rinse off of the polyhexamethylene biguanide hydrochloride from the surface being cleaned.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a hard surface cleaning composition which renders the surface being treated resistant to the growth of bacteria, wherein the composition comprises approximately by weight:
(a) 0 to 10%, more preferably 0.1% to 5% of at least one surfactant, selected from the group consisting of anionic surfactants, amine oxide surfactants, zwitterionic surfactants and nonionics and mixtures thereof;
(b) 0.01% to 5%, more preferably 0.1% to 3% of a polymer which is a polyethylene oxide polycarboxylate copolymer;
(c) 0.01% to 5%, more preferably 0.01% to 1% of polyhexamethylene biguanide hydrochloride; and
(d) the balance being water, wherein the composition does not contain an amino containing polymer, a silicon containing polymer, a cationic surfactant, a copolymer of polyvinyl pyrrolidone or polyvinyl pyrridine N-oxide polymers.
The zwitterionic surfactant used is a water soluble betaine having the general formula
wherein X— is selected from the group consisting of COO— and SO3—and R
1
is an alkyl group having 10 to about 20 carbon atoms, preferably 12 to 16 carbon atoms, or the amido radical:
wherein R is an alkyl group having about 9 to 19 carbon atoms and a is the integer 1 to 4; R
2
and R
3
are each alkyl groups having 1 to 3 carbons and preferably 1 carbon; R
4
is an alkylene or hydroxyalkylene group having from 1 to 4 carbon atoms and, optionally, one hydroxyl group. Typical alkyldimethyl betaines include decyl dimethyl betaine or 2-(N-decyl-N, N-dimethyl-ammonia)acetate, coco dimethyl betaine or 2-(N-coco N, N-dimethylammonia)acetate, myristyl dimethyl betaine, palmityl dimethyl betaine, lauryl dimethyl betaine, cetyl dimethyl betaine, stearyl dimethyl betaine, etc. The amidobetaines similarly include cocoamidoethylbetaine, cocoamidopropyl betaine and the like. The amidosulfobetaines include cocoamidoethylsulfobetaine, cocoamidopropyl sulfobetaine and the like. A preferred betaine is coco (C
8
-C
18
) amidopropyl dimethyl betaine. Three preferred betaine surfactants are Empigen BS/CA from Albright and Wilson, Rewoteric AMB 13 and Goldschmidt Betaine L7.
Regarding the anionic surfactant present in the compositions any of the conventionally used water-soluble anionic surfactants or mixtures of said anionic surfactants can be used in this invention. As used herein the term “anionic surfactant” is intended to refer to the class of anionic and mixed anionic-nonionic detergents providing detersive action.
Suitable water-soluble non-soap, anionic surfactants include those surface-active or detergent compounds which contain an organic hydrophobic group containing generally 8 to 26 carbon atoms and preferably 10 to 18 carbon atoms in their molecular structure and at least one water-solubilizing group selected from the group of sulfonate, sulfate and carboxylate so as to form a water-soluble detergent. Usually, the hydrophobic group will include or comprise a C
8
-C
22
alkyl, alkyl or acyl group. Such surfactants are employed in the form of water-soluble salts and the salt-forming cation usually is selected from the group consisting of sodium, potassium, ammonium, magnesium and mono-, di- or tri-C
2
-C
3
alkanolammonium, with the sodium, magnesium and ammonium cations again being preferred.
The anionic surfactants which may be used in the composition of this invention are water soluble and include the sodium, potassium, ammonium and ethanolammonium salts of linear C
8
-C
16
alkyl benzene sulfonates, alkyl ether carboxylates, C
10
-C
20
paraffin sulfonates, C
8
-C
18
alkyl sulfates, alkyl ether sulfates and mixtures thereof.
The paraffin sulfonates may be monosulfonates or di-sulfonates and usually are mixtures thereof, obtained by sulfonating paraffins of 10 to 20 carbon atoms. Preferred paraffin sulfonates are those of C
12-18
carbon atoms chains, and more preferably they are of C
14-17
chains. Paraffin sulfonates that have the sulfonate group(s) distributed along the paraffin chain are described in U.S. Pat. Nos. 2,503,280; 2,507,088; 3,260,744; and 3,372,188; and also in German Patent 735,096. Such compounds may be made to specifications and desirably the content of paraffin sulfonates outside the C
14-17
range will be minor and will be minimized, as will be any contents of di- or poly-sulfonates.
Examples of suitable other sulfonated anionic detergents are the well known higher alkyl mononuclear aromatic sulfonates, such as the higher alkylbenzene sulfonates containing 9 to 18 or preferably 9 to 16 carbon atoms in the higher alkyl group in a straight or branch
Mahieu Marianne
Zocchi Germaine
Colgate-Palmolive Co.
Nanfeldt Richard E.
Ogden Necholus
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