Concentrated hydrogen peroxide disinfecting solutions
View Patent ↗A concentrated and one phase cleaning and disinfecting solution containing a sparingly soluble cyclic carboxylic acid. The solution has a pH of from about 0.05 to about 2, and comprises, consists essentially of, or consists of from about 2% w/w to about 8% w/w hydrogen peroxide; from about 5% w/w to about 20% w/w linear alkyl benzene sulfonic acid; from about 0.5% w/w to about 8% w/w of at least one sparingly soluble (i.e. a solubility in pure water at room temperature of less than 1% w/w) cyclic carboxylic acid, wherein the cyclic carboxylic acid is present in acid and salt form in a ratio of at least 9:1 (acid:salt); from about 2% w/w to about 10% w/w of at least one block copolymer surfactant (e.g. PLURONIC L62); and from about 4% w/w to about 15% w/w of at least one solvent.
1. A concentrated and stable cleaning and disinfecting solution having a pH of from about 0.05 to about 2, comprising:
a. from about 2% w/w to about 8% w/w hydrogen peroxide;
b. from about 5% w/w to about 20% w/w of at least one C8-C16 linear alkyl aryl sulfonic acid;
c. from about 0.5% w/w to about 5% w/w of at least one sparingly soluble cyclic carboxylic acid, wherein the cyclic carboxylic acid is present in acid and salt form in a ratio of at least 9:1 (acid:salt);
d. from about 2% w/w to about 10% w/w of at least one block copolymer surfactant; and
e. from about 4% w/w to about 15% w/w of at least one solvent;
wherein the solution is stable.
2. The solution of claim 1 , wherein the hydrogen peroxide concentration is from about 3% w/w to about 8% w/w.
3. The solution of claim 1 , wherein the pH is from about 0.2 to about 2.
4. The solution of claim 1 , wherein the sparingly soluble carboxylic acid is chosen from benzoic acid and benzoic acid derivatives.
5. The solution of claim 4 , wherein the benzoic acid derivative is salicylic acid.
6. The solution of claim 1 , wherein the solvent is chosen from glycol ethers, short chain alcohols having from 1 to 8 carbon atoms, benzyl alcohol, and phenoxy ethanol.
7. The solution of claim 6 , wherein the glycol ethers are chosen from propylene glycol n-propyl ether, dipropylene glycol n-propyl ether, propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol monomethyl ether, dipropylene glycol n-propyl ether, tripropylene glycol n-propyl ether, dipropylene glycol n-butyl ether, tripropylene glycol n-butyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, and diethylene glycol monobutyl ether.
8. The solution of claim 7 , comprising propylene glycol n-propyl ether.
9. The solution of claim 1 , wherein the C8-C16 linear alkyl aryl sulfonic acid is dodecylbenzene sulfonic acid.
10. The solution of claim 1 , wherein the at least one block copolymer surfactant is chosen from (A)-(B)-(A) or (B)-(A)-(B) or
i. wherein A represents a block of propylene oxide repeating units and B represents a block of ethylene oxide repeating units, and wherein the block copolymer surfactant has a molecular weight of from 1500 to 30000 Daltons.
11. The solution of claim 10 , wherein the at least one block copolymer surfactant is a block copolymer with an average molecular weight of about 2500 Daltons, total weight of propylene oxide units of about 2000 Daltons and EO % of about 20%.
12. The solution according to claim 1 , diluted with water at a ratio of from 1:10 to 1:1000 (solution:water).