US2004221870A1PendingUtilityA1
Product and method to clean titanium surfaces
Priority: Oct 24, 2001Filed: Apr 22, 2004Published: Nov 11, 2004
Est. expiryOct 24, 2021(expired)· nominal 20-yr term from priority
C23G 1/02C23G 1/106C23G 1/205C23G 1/103C11D 3/222C11D 3/1266C11D 17/0043C11D 3/044C11D 17/003C11D 3/042C23G 1/00C11D 2111/16
36
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Claims
Abstract
A cleaning product that is useful for cleaning titanium surfaces such as titanium facades and panels includes, separately, (A) a descaling substance consisting of a mixture of nitric acid and hydrofluoric acid, a thickener, a surfactant, an indicator, water and, optionally, a propellant; and (B) a fixative composition that consists of a base, a thickener, a surfactant and a propellant.
Claims
exact text as granted — not AI-modified1 . A cleaning product that is comprised, separately, of:
A) a descaling substance that consists of: A.1) a mixture of nitric acid and hydrofluoric acid; A.2) a thickener; A.3) a surfactant; A.4) an indicator; A.5) water; and, optionally, A.6) a propellant; and B) a fixative that consists of: B.1) a base; B.2) a thickener; B.3) a surfactant; B.4) water; and B.5) a propellant.
2 . A cleaning product according to claim 1 , wherein the mixture of nitric acid and hydrofluoric acid is present in this descaling substance at a concentration ranging from 1% to 20% in weight relative to the total descaling compound.
3 . A cleaning product according to claim 1 , wherein the weight ratio of nitric acid: hydrofluoric acid is 10:1.
4 . A cleaning product according to claim 1 , wherein the thickener present in the descaling compound is of water-soluble organic pseudoplastic type.
5 . A cleaning product according to claim 4 , wherein said water-soluble organic pseudoplastic thickener is selected from cellulotic type thickeners and natural gums.
6 . A cleaning product according to claim 5 , wherein said thickener is xanthane gum.
7 . A cleaning product according to claim 1 , wherein said descaling substance contains this thickener in a concentration ranging from 0.1% to 1% in weight relative to the total descaling composition.
8 . A cleaning product according to claim 1 , wherein the surfactant present in the descaling substance is selected from anionic and cationic surfactants.
9 . A cleaning product according to claim 8 , wherein the surfactant is sodium dodecyl sulphate.
10 . A cleaning product according to claim 1 , wherein the descaling substance contains this surfactant in a concentration ranging from 0.1 to 1% in weight relative to the total descaling composition.
11 . A cleaning product according to claim 1 , wherein the indicator is phenophthalein.
12 . A cleaning product according to claim 1 , wherein the indicator is present in the descaling substance at a concentration lower than 0.1% in weight relative to the total descaling composition.
13 . A cleaning product according to claim 1 , wherein the propellant present in this descaling composition is a liquated gas selected from among hydrocarbons and hydrofluorocarbons (HFC).
14 . A cleaning product according to claim 13 , wherein the propellant is HFC 134a.
15 . A cleaning product according to claim 1 , wherein the descaling composition contains a liquated gas as a propellant at a concentration ranging from 5% to 20% in weight relative to the total descaling composition.
16 . A cleaning product according to claim 1 , wherein the propellant present in the descaling substance is a compressed gas.
17 . A cleaning product according to claim 16 , wherein the compressed gas is nitrogen, carbon dioxide, nitrous oxide or air.
18 . A cleaning product according to claim 1 , wherein the base, present in this fixative composition is either an alkaline metal hydroxide or trisodium phosphate.
19 . A cleaning product according to claim 18 , wherein the base present in the fixative composition is sodium hydroxide.
20 . A cleaning product according to claim 1 , wherein the base is present in this fixative at a concentration ranging from 1 to 20% relative to the total fixative composition.
21 . A cleaning product according to claim 1 , wherein the thickening agent present in the fixative is an inorganic silicate-based thickener.
22 . A cleaning product according to claim 21 , wherein the thickening agent is sepiolite.
23 . A cleaning product according to claim 1 , wherein the fixative contains the thickening agent in a concentration ranging from 1% to 8% in weight relative to the total fixative composition.
24 . A cleaning product according to claim 1 , wherein the surfactant present in the fixative composition is selected from anionic or cationic surfactants.
25 . A cleaning product according to claim 24 , wherein the surfactant is sodium dodecylsulphate.
26 . A cleaning product according to claim 1 , wherein the fixative contains this surfactant at a concentration ranging from 0.1% to 1% in weight relative to the total of fixative composition.
27 . A cleaning product according to claim 1 , wherein the propellant present in the fixative is a liquated gas chosen from hydrocarbons or hydrofluorocarbons (HFC).
28 . A cleaning product according to claim 27 , wherein the propellant is HFC 134a.
29 . A cleaning product according to claim 1 , wherein the fixative contains a liquated gas as a propellant in a concentration ranging from 5% to 20% in weight of the total said fixative.
30 . A cleaning product according to claim 1 , wherein the propellant present in this fixative is a compressed gas.
31 . A cleaning product according to claim 30 , wherein the compressed gas is nitrogen, carbon dioxide, nitrous oxide or air.
32 . A cleaning product according to claim 1 , further comprising, separately:
A) a descaling substance containing:
A mixture of:
Nitric acid (HNO 3 )
1-10%
Hydrofluoric acid (HF)
0.1-1%
In which the weight ratio HNO 3 :HF is 10:1
A thickener
0.1-1%
A surfactant
0.1-1%
An indicator
<0.1%
A propellant (liquated gas)
5-20%
Water (as required for)
100%
Where the percentages are percentages in weight relative
to the total descaling substance; and
B) a fixative containing:
A base
5-15%
A thickener
2-8%
A surfactant
0.1-1%
A propellant (liquated gas)
5-20%
Water (as required for)
100%
Where the percentages are percentages in weight relative
to the total fixative composition.
Where the percentages are percentages in weight relative to the total fixative composition.
33 . A cleaning product according to claim 32 , further comprising, separately:
A) A descaling substance containing:
A mixture of:
HNO 3 60%
1-10%
HF 48%
0.1-1%
With a weight ratio
HNO 3 :HF of 10:1
Xanthane gum
0.1-1%
Sodium dodecylsulphate
0.1-1%
Phenolphthalein
<0.1%
HFC 134a (liquated gas)
5-20%
Water (as required for)
100%
Where the percentages are percentages in weight relative
to the total descaling composition; and
B) a fixative containing:
NaOH
5-15%
sepiolite
2-8%
sodium dodecylsulphate
0.1-1%
HEC 134a (liquated gas)
5-20%
Water (as required for)
100%
Where the percentages are percentages in weight relative
to the total fixative composition.
Where the percentages are percentages in weight relative to the total fixative composition.
34 . A cleaning product according to claim 1 , wherein the descaling composition is presented as foam, spray gel or gel.
35 . A cleaning product according to claim 1 , wherein the fixative is present as foam or spray gel.
36 . A method of cleaning titanium surfaces comprising the steps of:
a) provision of a cleaning product that is comprised, separately, of:
a descaling substance that consists of a mixture of nitric acid and hydrofluoric acid, a thickener, a surfactant, an indicator, water and, optionally, a propellant; and
a fixative that consists of a base, a thickener, a surfactant, water and a propellant
b) application of the descaling substance of the said cleaning product on the surface to be cleaned and leaving this to act for a given period of time; c) application of the fixative of this cleaning product to the titanium surface previously treated with this descaling substance in stage b), and leaving this to act for a given period of time; d) aspiration of the titanium surface previously treated with these descaling and fixative substances in stages b) and c); and e) rinsing the treated titanium surface after carrying out stage d).
37 . A method according to claim 36 , wherein the application of the descaling substance to the titanium surface to be cleaned is done by a spray gun or by a sponge trowel, and left to act for a period of time ranging from 15 seconds to 10 minutes before applying the fixative.
38 . A method according to claim 36 , wherein the application of the fixative on the titanium surface to be cleaned, previously treated with the descaling substance is done using a spray gun, and is left to act for a period ranging from 15 seconds to 5 minutes before starting stage d) after confirming that the neutralization has taken place.
39 . A method according to claim 36 , wherein rinsing of the treated titanium surface is done with water jets at a temperature ranging from 5° C. to 30° C.Join the waitlist — get patent alerts
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