Composition and method for road-film removal
View Patent ↗A concentrate and a ready-to-use or diluted formulation for an aqueous vehicle cleaner can remove a wide range of different types of traffic film using either low pressure application, hand pressure application, water jet spray apparatus, clean-in-place systems or other manual or mechanical washing systems. The compositions may comprise, for example, one or more solutions that each or collectively contain or comprises: a) at least one anionic surfactant; b) at least one poly[oxyalkylene] ammonium cationic surfactant; and c) an alkaline agent. Optional additional ingredients may comprise at least one polycarboxylic acid chelating agent (preferably an aminocarboxylic acid chelating agent), at least one non-ionic or amphoteric surfactant, at least one hydrotrope, inorganic and/or organic acids and at least one silicate. The alkaline agent may provide a pH (when the finished product is diluted to 0.5 to 5% by weight in water) will be between about 9 to 13. The concentrate may be provided as a one-part or two part solution. Certain formulations have been found to be shelf stable as one-part concentrate or ready-to-use solutions, even with significantly different properties amongst the components. The compositions of the invention are also used in cleaning processes for surfaces, especially vehicle surfaces in car wash systems. The compositions are used in such processes where there are single or multiple liquid application steps.
1. An aqueous solution at a pH between 1.0 and 13 comprising:
a) at least one anionic surfactant,
b) at least one propoxylated ammonium cationic surfactant of the formula
wherein R, R 1 , and R 2 are independently selected from lower alkyl groups, R 3 comprises a polyoxypropylene chain of a general formula selected from the group consisting of:
wherein n is from 1 to 60, m is from 0 to 30, and m+n is between 1 and 60, and X comprises an anion, and
(c) at least one material comprising at least one of an alkaline agent and an acidulating agent.
2. The aqueous solution according to claim 1 , wherein the at least one anionic surfactant comprises at least one of linear alkyl benzyl sulfonates, alpha olefin sulfonates, alkyl sulfates, secondary alkane sulfonates, and mixtures thereof.
3. The aqueous solution according to claim 1 , further comprising:
(a) at least one polycarboxylic acid chelating agent.
4. The aqueous solution according to claim 1 , further comprising:
(a) at least one amine containing carboxylic acid chelating agent.
5. The aqueous solution according to claim 1 , further comprising:
(a) at least one amine containing acetic acid chelating agent.
6. The aqueous solution according to claim 1 , further comprising at least one additional additive that comprises at least one of a polycarboxylic acid chelating agent, a nonionic surfactant, amphoteric surfactant, silicate, and mixtures thereof.
7. The aqueous solution according to claim 1 , further comprising at least one chelating agent for multivalent metal cations that is present from about 2×10 −3 % to 50% by weight.
8. The aqueous solution according to claim 1 , wherein
(a) the at least one anionic surfactant is present from about 1×10 −2 % to 25% by weight and
(b) the propoxylated ammonium cationic surfactant is present from about 1×10 −2 % to 8% by weight.
9. The aqueous solution according to claim 1 , wherein the at least one material comprises an alkaline agent present from about 0.25% to 12% by weight.
10. A process for cleaning a surface comprising applying an aqueous solution to the surface, wherein the aqueous solution has a pH between 1.0 and 13 and comprises:
(a) at least one anionic surfactant,
(b) at least one propoxylated ammonium cationic surfactant of the formula
wherein R, R 1 , and R 2 are independently selected from lower alkyl groups, R 3 comprises a polyoxypropylene chain of a general formula selected from the group consisting of:
wherein n is from 1 to 60, m is from 0 to 30, and m+n is between 1 and 60, and X comprises an anion, and
(c) at least one material comprises at least one of an alkaline agent and an acidulating agent.
11. A process for cleaning according to claim 10 , wherein the surface is part of a vehicle.
12. A process for cleaning according to claim 10 , wherein the surface is a wheel of a vehicle.
13. A process for cleaning according to claim 10 , further comprising applying an acidic presoak solution to the surface.
14. A process for cleaning according to claim 13 , wherein the acidic presoak solution has a pH between 1.0 and 5.5 and comprises:
an acid,
inorganic acid, and
at least one surfactant.
15. A process for cleaning according to claim 10 , wherein the surface is within a clean-in-place system.
16. A process for cleaning according to claim 10 , wherein the applying step is done with a water jet spray apparatus.
17. A process for cleaning an exterior surface of a vehicle comprising applying an aqueous solution to the exterior surface of the vehicle to be cleaned, wherein the solution has a pH of between 1.0 and 13 and comprises:
(a) at least one anionic surfactant,
(b) at least one propoxylated ammonium cationic surfactant, and
(c) at least one of an alkaline agent and an acidulating agent.
18. A process for cleaning according to claim 17 , further comprising at least one additional additive that comprises at least one of a polycarboxylic acid chelating agent, a nonionic surfactant, amphoteric surfactant, silicate, and mixtures thereof.
19. A process for cleaning according to claim 17 , wherein the propoxylated ammonium cationic surfactant comprises a surfactant having the formula:
wherein R, R 1 , and R 2 are independently selected from lower alkyl groups, R 3 comprises a polyoxypropylene chain, and X comprises an anion.
20. A process for cleaning an exterior surface of a vehicle according to claim 19 , wherein the polyoxypropylene chain comprises at least one of:
wherein m is from 0 to 30, and n is from 1 to 60.
21. A process for cleaning according to claim 17 , wherein the at least one anionic surfactant comprises at least one of linear alkyl benzyl sulfonates, alpha olefin sulfonates, alkyl sulfates, secondary alkane sulfonates, and mixtures thereof.
22. A process for cleaning an exterior surface of a vehicle comprising applying an aqueous solution to the exterior surface of the vehicle to be cleaned, wherein the solution has pH of between 1.0 and 13 and comprises:
(a) at least one propoxylated ammonium cationic surfactant, and
(b) at least one of an alkaline agent and an acidulating agent.
23. A process for cleaning an exterior surface of a vehicle according to claim 22 , wherein the propoxylated ammonium cationic surfactant comprises a surfactant having the formula:
wherein R, R 1 , and R 2 are independently selected from lower alkyl groups, R 2 comprises a polyoxypropylene chain, and X comprises an anion.
24. A process for cleaning an exterior surface of a vehicle according to claim 23 , wherein the polyoxypropylene chain comprises at least one of:
wherein m is from 0 to 30, and n is from 1 to 60.
25. A process for cleaning an exterior surface of a vehicle according to claim 22 , wherein the solution further comprises at least one polycarboxylic acid chelating agent.
26. A process for cleaning an exterior surface of a vehicle according to claim 22 , wherein the solution further comprises at least one amine containing carboxylic acid chelating agent.
27. A process for cleaning an exterior surface of a vehicle according to claim 22 , wherein the solution further comprises at least one additional additive comprising at least one of a polycarboxylic acid chelating agent, a nonionic surfactant, amphoteric surfactant, silicate, and mixtures thereof.