US 3812046 A
Description (OCR text may contain errors)
United States Patent 3,812,046 GERMICIDAL LIQUID CLEANER Albert Jay Lancz, Piscataway, N.J., assignor to Colgate-Palmolive Company, New York, N.Y. No Drawing. Filed Nov. 18, 1970, Ser. No. 90,826 Int. Cl. Clld 1/10, 1/62, 3/48 US. Cl. 252-106 5 Claims ABSTRACT OF THE DISCLOSURE A phosphate-free germicidal liquid cleaner contains an alkyl dimethyl benzyl ammonium chloride, a nonionic surfactant, nitrilotriacetic acid trisodium salt builder, and sodium bicarbonate stabilizer.
BACKGROUND OF THE INVENTION The present invention relates in general to germicidal liquid cleaners and in particular to phosphate-free germicidal cleaners.
In view of the possible eutrophic effects of large amounts of phosphates on waterways and the like as manifested by undesirable algae growth, it has been proposed to avoid the use of phosphate in cleaning compositions, thus making it desirable to consider the use of other builders.
I SUMMARY OF THE INVENTION It has been found that nitrilotriacetic acid trisodium salt may be used as a builder in a germicidal liquid cleaner containing a nonionic surfactant, an alkyl dimethyl benzyl quaternary ammonium chloride as a germicide, and sodium bicarbonate stabilizer. In the past the phosphate builders were found to be incompatible with the quaternary germicide.
Thus, a primary object of the present invention resides in the provision of a phosphate free germicidal liquid cleaner.
Another object of the invention resides in the use. of nitrilotriacetic acid trisodium salt as a builder for nonionic surfactants in germicidal liquid cleaners containing alkyl dimethyl benzyl ammonium chloride.
Still another object of the invention resides in the use of sodium bicarbonate as a .stabilizer for a germicidal cleaner containing a nonionic surfactant, nitrilotriacetic acid trisodium salt, and an alkyl dimethyl benzyl ammonium chloride germicide.
DETAILED CONSIDERATION OF THE INVENTION The quaternary surfactants suitable for use in my germicidal liquid cleaner are, for example, alkyl dimethyl benzyl ammonium chlorides in which the alkyl group contains from about 8 to about 18 carbon atoms. It has been found that from about 0.10% to about 10.0% by weight preferably from about 0.10% to about 5.5% by weight of the quaternary surfactant is required.
Roccal or Cyneal, sold by Sterling Drug, have been found to be commercial quaternary germicidal ingredients suitable for use in my novel liquid cleaners. In these alkyl dimethyl benzyl ammonium chlorides the alkyl chain contains 8-18 carbon atoms. Other typical quaternary ammonium compounds are ethyl-dimethyl-stearyl ammonium chloride, benzyl-dimethyl-stearyl ammonium chloride, trimethyl stearyl ammonium chloride, trimethylcetyl ammonium bromide, dimethyl-ethyl diluaryl ammonium chloride, dimethyl-propyl myristyl ammonium chloride, and the corresponding methosulfates and acetates.
The nonionic surfactant used in the liquid cleaner may be, for example, a polyethoxylate of a fatty alcohol containing from about 10 to about 16 carbon atoms and having an MR (mol ratio of combined ethylene oxide to hydrophobe) of at least 5. It has been found that useful germicidal liquid cleaners may contain from about 0.1% to about 10.0% by weight, preferably from about. 1.0% to about 5.0% by weight of these polyethoxylates in combination with the other ingredients as set forth.
Nitrilotriacetic acid trisodium salt in amounts ranging from about 1.0% to about 25.0% by weight, preferably from about 2.5% to about 12.5% by weight is suitable for use as a builder in my novel germicidal liquid cleaners. One important advantage of the nitrilotriacetic acid trisodium salt builder is that homogeneous solutions, even on dilution, are obtained where it is used. On the other hand, :certain phosphate builders are incompatible with the quarternary compounds under usual storage conditions.
Additionally, a quantity of a polyethoxylated aliphatic amine is included wherein the aliphatic groups range from C to C Particularly, the compound having a C has been found useful as the resulting formulation yields a clear solution even when diluted with considerable water for actual use. The quantity of the polyethoxylated aliphatic amine useful is in the range from about 0% to about 2.0% by weight, preferably from about 0.25% to about 0.75%. The MR of such products ranges from about 8 to about 20, and preferably 12 to 16.
A stabilizer, such as sodium bicarbonate, in amounts ranging fromabout 0% to about 2.0% by Weight prefera-bly from about 0.2% to about 1.0% by weight, may be added to these novel cleaners of the present invention.
These liquid cleaners, when used as directed, are capable of destroying various Gram-positive and Gramnegative bacteria.
The following compositions are set forth by way of example of my novel germicidal liquid cleaners.
1 Average MW-197 Ci2 40% C14 20% balance Ca, C10, C16 and 018.
This composition has a pH of 10.5 and a specific gravity of 1.07 at F. The cleaning and germicidal properties of this product has been established even when it is diluted to 64 times its volume with water. Rigorous testing revealed that the product at 1:64 dilution kills pathogenic microorganisms, such as Pseudomonas aeraginosa, Staphylococcus aureus and Salmoneda choleraesuis.
EXAMPLE II Percent by weight Cyncal (alkyl dimethyl benzyl ammonium chloride) 0.18 Fatty alcohols (C -C polyethoxylate (MR- 7) 1.20 Nitrilotriacetate acid trisodium salt 5.00 NaHCO, 0.37 Polyoxyethylene lauryl amine (MR-l5) 0.40 Perfume 0.05
Balance water 50% C14; 40% C12; 10% C10.
This composition has a pH of 10.5 and a specific gravity of 1.03 at 80 F. The composition may be diluted for use or may be used as is; depending on the nature of the work to be done.
EXAMPLE III Percent by weight EXAMPLE V Percent by weight C fatty alcohol polyethoxylate MR6.5 3.0 Ethyl-dimethyl-stearyl ammonium chloride 2.5 Nitrilotriacetate acid trisodium salt 4.0 Balance water It is understood that changes and variations may be made in the present invention by one skilled in the art without departing from the spirit and scope thereof as defined in the appended claims.
What is claimed is:
1. An aqueous germicidal liquid cleaner consisting essentially of:
(1) from about 0.10 to about 5.5 parts by weight of an alkyl dimethyl benzyl ammonium chloride in which the alkyl group contains from about 8 to about 18 carbon atoms,
(2) from about 1.0 to about 5.0 parts by weight of a polyethoxylate of a 10 to 16 carbon atoms fatty alcohol with a mol ratio from about to 7,
(3) from about 2.5 to about 12.5 parts by weight of nitrilotriacetic acid trisodium salt, and
(4) water. I
2. A germicidal liquidcleaner according to claim 1 in which ingredients (1), (2) and (3) are in a quantity, respectively:
(1) from about 3.0 to about 7.0 parts by weight of the alkyl dimethyl benzyl ammonium chloride,
(2) from about 2.0 to about 4.0 parts by weight of the fatty alcohol polyethoxylate, and W (3) from about 8.0 to about 12.0 parts by weight of nitrilotriacetic acid trisodium salt.
3. A germicidal liquid cleaner according to claim 1 containing up to about 0.4 parts by weight of sodium bicarbonate.
4. A germicidal liquid cleaner according to claim 2 containing about 0.8 parts by weight of sodium bicarbonate. I
5. A liquid cleaner according to claim 1 containing up to 2% of a polyethoxylated aliphatic amine with a mol ratio of from 8 to 20 and wherein the aliphatic group contains from 8 to 18 carbon atoms.
References Cited UNITED STATES PATENTS 3,282,775 11/1966 Stonehill 252-106 X 3,223,644 12/1'965 Law 252-106 3,247,119 4/ 1966 Herrick et a1 252-106 3,507,796 4/ 1970 Voss 252-106 3,282,849 11/1966 Diehn et al 252-106 FOREIGN PATENTS 795,814 5/1958 Great Britain.
663,565 12/ 1951 Great Britain.
6802352 8/ 1968 Netherlands.
964,448 7/1964 Great Britain.
661,724 11/1951 Great Britain.
OTHER REFERENCES Amino Acid Chelating Agents in Detergent Applications, R. R. Pollard, Soap & Chem. Specialties, September 1966, pp. 58-62 and -135.
P-fizer Aminocarboxylic Acids Chelating Agents, Data Sheet No. 606, Chas. Pfizer & Co. Inc., pp. 8 and 9.
Sequestrene, Alrose Chem. Co., Prov. R. I., July 1952, pp. 25, 26.
Pfizer Aminocarboxylie Chelating Agents, Pfizer & Co., Inc., pp. 2 and 7.
Procter & Gamble Technical Infor. Sheet, October 1964, Procter & Gamble Co., pp. 1-4.
Products &.Processes," Soap & Chem. Specialties, July 1962, p. 159.
HERBERT B. GUYNN, Primary Examiner P. E. WILLIS, Assistant Examiner US. Cl. X.R.