PROCESS FOR THE MANUFACTURE OF AN AQUEOUS COMPOSITION SUITABLE FOR PHYSICAL FOAMING

Abstract

A process for the manufacture of an aqueous composition suitable for physical foaming comprising hydrogen peroxide, peracetic acid in an amount of at least 1 wt % and at least one amine oxide, said process comprising a step of adding at least one fatty acid in an amount of at least 0.1 wt % with regard to the total weight of the composition.

Claims

1. A process for the manufacture of an aqueous composition that comprises hydrogen peroxide, at least one fatty acid, at least one amine oxide, and at least 1 wt %, based on the total weight of the composition, peracetic acid and is suitable for physical foaming, comprising: mixing a solution of the at least one fatty acid, present in an amount of at least 0.1 wt %, based on the total weight of the composition, in acetic acid with the-at least one amine oxide and hydrogen, peroxide optionally in the presence of a strong acid catalyst and/or of at least one stabilizer; and allowing the peracetic acid to form in situ.

2. The process according to claim 1, wherein peracetic acid is in a concentration below 5 wt %.

3. The process according to claim 1, wherein the at least one amine oxide is lauramine oxide and/or myristamine oxide.

4. The process according to claim 1, wherein the composition has a pH below 2.0.

5. The process according to claim 1, wherein the at least one fatty acid added to the composition is lauric acid and/or myristic acid.

6. The process according to claim 1, wherein the mixing is in the presence of the stabilizer and the stabilizer comprises dipicolinic acid and hydroxyethylidene-diphosphonic acid.

7. The process according to claim 1, wherein the solution of the at least one fatty acid in acetic acid is in the form of a masterbatch and is formed in a separate, dedicated device that is compliant with ATEX EU directives.

8. The process according to claim 1, wherein the mixing is in the presence the strong acid catalyst, the solution of the at least one fatty acid in acetic acid is in the form of a masterbatch, and the masterbatch comprises the strong acid catalyst.

9. The process according to claim 1, wherein the solution of the at least one fatty acid in acetic acid is provided as a first masterbatch, other ingredients of the composition are provided as a second masterbatch, and the second masterbatch is mixed with the first masterbatch.

10. The process according to claim 1, wherein the solution of the at least one fatty acid in acetic acid is in the form of a masterbatch, other ingredients of the composition are added separately to the masterbatch, and the at least one amine oxide is added at the end.

11. A foaming composition comprising: hydrogen peroxide, at least one amine oxide, peracetic acid in an amount of at least 1 wt %, and at least one fatty acid in an amount of at least 0.1 wt %, wherein each amount is based on the total weight of the composition.

12. A method for disinfecting and cleansing, comprising applying it a composition according to claim 11 in the form of a foam to a hard surface and permitting contact to be maintained until at least some disinfection has occurred.

13. The method according to claim 12, wherein the composition is applied using a spray gun and the at least one amine oxide is added to the composition inside the spray gun.

14. The method according to claim 12, wherein the hard surface is made of stainless steel.

15. The process of claim 1, wherein the solution of the at least one fatty acid in acetic acid is a solution of the at least one fatty acid in glacial acetic acid.

16. The process according to claim 4, wherein the composition comprises a mineral acid.

17. The process according to claim 4, wherein the masterbatch comprises H.sub.2SO.sub.4.

18. The process according to claim 8, wherein the masterbatch comprises a mineral acid.

19. The process according to claim 18, wherein the mineral acid is H.sub.2SO.sub.4.

20. The process according to claim 8, wherein the strong acid is H.sub.2SO.sub.4.

Description

EXAMPLES E1 TO E3

[0042] The following ingredients have been mixed, heated at about 40° C. and left to stand overnight. Their PAA concentration was of 3.5 wt % and their H2O2 concentration of 15 wt %.

TABLE-US-00001 Chemicals (g) E1 E2 E3 AcAc 303.53 303.53 303.53 H2O2 1015.67 1015.67 1015.67 LA 1.40 2.45 1.40 MA 0.60 1.05 0.6 AMMONYX ® LO 216.66 186.66 186.66 HEDP (60 wt % solution in H2O) 20 20 20 DPA (10 wt % solution in H2O) 4.5 4.5 4.5 DMW 437.64 466.14 467.64 Total weight 2000 2000 2000

[0043] They have been sprayed and foamed (*) on a vertical surface made of stainless steel next to the above mentioned Diverfoam Active VT70. After 11 min, the latter has completely fallen off the surface while composition E1 to E3 were still present as a rather uniform foam.

(*) using a spray gun which sucked the different compositions by a Venturi effect using water at a pressure of 20 bar and with a dilution ratio of about 1%, and an air pressure of 6 bar.

[0044] These solutions tend to become cloudy (opaque) at about 0° C. and below.

[0045] Comparatively, a similar composition but containing additionally about 0.6 wt % H2SO4 and obtained by mixing 2 masterbatches (one containing all the acids, namely AcAc, LA, MA and H2SO4; and the other containing the reminder of the ingredients namely H2O2, HEDP, DPA, AMMONYX® LO and DMW (DeMineralized Water)) only becomes cloudy (opaque) at about −6° C. and below.

[0046] Should the disclosure of any patents, patent applications, and publications which are incorporated herein by reference conflict with the description of the present application to the extent that it may render a term unclear, the present description shall take precedence.