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(11) | EP 0 723 035 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Procedure for the preparation of high concentration suspension of organic and inorganic compounds |
Applicable as a disintegrating agent for various copper compounds or copper alloy compounds which form over time.
[0001] This Patent of Invention relates to a new procedure for preparing suspensions of salts of ammoniac, primary amines, secondary amines, tertiary amines and zinc at high concentrations and presenting optimum stability and fluidity and especially ideal ease of application, as a disintegrating agent for various copper compounds or alloys thereof, which form over time (ageing), while at the same time lowering the melting temperature of alloys of tin, lead and silver at multiple concentrations, and in the form of bars, wire or powder, with copper or alloys thereof, thus permitting, with the application of heat, the diffusion of the additive alloy on the surface of the copper compounds.
[0002] To date, in order to achieve such results it was necessary either to carry out mechanical cleaning of the metal, that is, eliminating oxides or impurities with an abrasive material, or to employ a chemical attack using acid. This was followed by the addition of a suitable alloy and heat to achieve union of the metals and a permanent bond between them. To render this possible it was necessary to provide the system with a compound which would lower the melting point of the metals involved. This procedure also prevents oxidation of the copper compounds during heating and ensures suitable wetting of the suspension on the metal.
[0003] These compounds, with a high concentration of electrolytes, due to their composition, were supplied either in a highly compact form, similar to tar, or in a liquid form like water.
[0004] Both these alternative presentations have advantaworking, since the product does not come into contact with the skin. The main disadvantage is that this liquid state does not prevent easy spillage and dripping during work with and handling of the product: the alternative presentation, that is in solid form, prevents accidental spillage but does not manage to avoid the contact with the hands during use, since due to its physical state operatives end up in practice applying it with their fingers.
[0005] This invention has achieved a stable suspension of the chemical components at a high concentration, thus lending the product a consistency such as to avoid accidental spillage, while permitting it to be applied by brush, thereby achieving a hygienic way of working. Chemically, it is difficult at such high concentrations to achieve a fluid suspension which is stable over time.
[0006] The procedure of this invention is characterized by the utilization of a suspending or emulsifying agent formed by a mixture of one, two or three of the following components, in multiple proportions:
1. Mixture of polyethylene glycol ethers with fatty alcohols of 12 to 14 carbon atoms,
having the following linkage formula 1, originating from a condensate of ethylene oxide on fatty acid C12 to C14:
CH3-(CH2)n-O-CH2-CH2-O-(CH2-CH2-O-)X-CH2-CH2-O-(CH2)n-CH3 1
where n = 11, 12 or 13andx: 1<x<25 or having linkage formula 2:
CH3-(CH2)n-O-(CH2-CH2-O-)X-1-CH2-CH2-OH 2
where n and x have the same values as in 1.
The mixture may contain various polyethylene glycols unetherified with fatty acid,
linkage formula 3 and non-reacted fatty alcohols of C12 to C14, linkage formula 4.
HO-(CH2-CH2-O-)X-1-CH2-CH2-OH 3
CH3-(CH2)n-OH 4
where n and x have the same values as in 1.
2. Mixture of polyethylene glycol ethers with fatty alcohols of 16 to 18 carbon atoms,
having the following linkage formula 5, originating from a condensate of ethylene oxide on fatty acid C16 to C18:
CH3-(CH2)n-O-CH2-CH2-O-(CH2-CH2-O-)x-CH2-CH2-O-(CH2)n-CH3 5
where n = 15, 16 or 17and x: 1<x<25 or having linkage structural formula 6:
CH3-(CH2)n-O-CH2-CH2-O-(CH2-CH2-O-)x-1 -CH2-CH2-OH 6
where n and x have the same values as in 5.
The mixture may also contain various polyethylene glycols unetherified with fatty
alcohol, of linkage formula 7, and unreacted fatty alcohols of C16 to C18, linkage formula 8
HO-(CH2-CH2-O-)x-1-CH2-CH2-OH 7
CH3-(CH2)n-OH 8
where n and x have the same values as in 5.
3. Mixture of fatty alcohols of 12 to 18 carbon atoms, having the linkage formula
9, and salts of fatty acids of 12 to 18 carbon atoms, having the linkage formula 10, as follows:
CH3-(CH2)n-CH2-OH 9
and
CH3-(CH2)n-COOH 10
where n = 10 to 16
[0007] In order to aid understanding of the foregoing, there follows below an example of the procedure of the invention. Owing to its purely illustrative nature, said example must be considered to have no limiting effect on the scope of the protection sought, so that such variants of detail as are deemed advisable by experience may be introduced without detriment to the essential content of the invention.
[0008] Example 1: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 25 grams of zinc chloride, 5 grams of ammonium chloride and 17 grams of the mixture of polyethylene glycol ethers with the fatty alcohols; the mixture is then cooled with agitation.
[0009] Example 2: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 15 grams of zinc chloride, 10 grams of dichloride of zinc and ammonium and 17 grams of the mixture of polyethylene glycol ethers with the fatty alcohols; the mixture is then cooled with agitation.
[0010] Example 3: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 25 grams of zinc chloride, 5 grams of ammonium chloride, 10 grams of finely powdered mixture of tin, lead and silver, in various proportions, and 17 grams of the mixture of polyethylene glycol ethers with the fatty alcohols; the mixture is then cooled with agitation.
[0011] Example 4: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 15 grams of zinc chloride, 15 grams of triethanolamine and 17 grams of the mixture of polyethylene glycol ethers with the fatty alcohols; the mixture is then cooled with agitation.
[0012] Example 5: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 20 grams of zinc chloride, 15 grams of triethanolamine and 13 grams of the mixture of fatty alcohols and fatty acid salts, and 5 grams of the mixture of polyethylene glycol ethers with the fatty alcohols; the mixture is then cooled with agitation.
[0013] Example 6: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 15 grams of zinc chloride, 15 grams of dichloride of zinc and ammonium and 17 grams of the mixture of fatty alcohols and fatty acid salts; the mixture is then cooled with agitation.
[0014] Example 7: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 25 grams of zinc chloride, 5 grams of ammonium chloride, 10 grams of finely powdered mixture of tin, lead and silver, in various proportions, and 17 grams of the mixture of fatty alcohols and fatty acid salts; the mixture is then cooled with agitation.
[0015] Example 8: 100 grams of water are heated to a temperature of 85-90°C and the following components are then added, with mechanical agitation: 15 grams of zinc chloride, 15 grams of paraphenylendiamine hydrochloride and 17 grams of the mixture of fatty alcohols and fatty acid salts; the mixture is then cooled with agitation.
a) Mixture of polyethylene glycol ethers with fatty alcohols of 12 to 14 carbon atoms,
having the following linkage formula 1, originating from a condensate of ethylene oxide on fatty acid C12 to C14:
CH3-(CH2)n-O-CH2-CH2-O-(CH2-CH2-O-)X-CH2-CH2-O-(CH2)n-CH3 1
where n = 11, 12 or 13andx: 1<x<25 or having linkage formula 2:
CH3-(CH2)n-O-(CH2-CH2-O-)X-1-CH2-CH2-OH 2
where n and x have the same values as in 1.
The mixture may contain various polyethylene glycols unetherified with fatty acid,
linkage formula 3 and unreacted fatty alcohols of C12 to C14, linkage formula 4.
HO-(CH2-CH2-O-)X-1-CH2-CH2-OH 3
CH3-(CH2)n-OH 4
where n and x have the same values as in 1.
b) Mixture of polyethylene glycol ethers with fatty alcohols of 16 to 18 carbon atoms,
having the following linkage formula 5, originating from a condensate of ethylene oxide on fatty acid C16 to C18:
CH3-(CH2)n-O-CH2-CH2-O-(CH2-CH2-O-)x-CH2-CH2-O-(CH2)n-CH3 5
where n = 15, 16 or 17and x: 1<x<25 or having linkage formula 6:
CH3-(CH2)n-O-CH2-CH2-O-(CH2-CH2-O-)x-1-CH2-CH2-OH 6
where n and x have the same values as in 5.
The mixture may also contain various polyethylene glycols unesterified with fatty
alcohol, of linkage formula 7, and unreacted fatty alcohols of C16 to C18, linkage formula 8
HO-(CH2-CH2-O-)x-1-CH2-CH2-OH 7
CH3-(CH2)n-OH 8
where n and x have the same values as in 5.
c) Mixture of fatty alcohols of 12 to 18 carbon atoms, having linkage formula 9, and salts of fatty acids of 12 to 18 carbon atoms, having linkage formula 10, as follows:
CH3-(CH2)n-CH2-OH 9
and
CH3-(CH2)n-COOH 10
where n = 10 to 16