Platinum complex formulations

Abstract

The present invention relates to a preparation comprising: (A) 30% to 90% by weight of at least one organic solvent; (B) 10% to 70% by weight of at least one [L1L2Pt[O(CO)R1]X] n A platinum complex of the type, wherein L1 and L2 represent identical or different monoolefin ligands or collectively represent a compound L1L2 acting as a diene ligand, wherein X is selected from bromide, chloride, iodide and -O(CO)R2, wherein -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or collectively represent non-aromatic C8-C18 dicarboxylic acid groups -O(CO)R1R2(CO)O-, wherein it is a mononuclear platinum complex with n=1, or wherein in the presence of L1L2 and / or -O(CO)R1R2(CO)O-, it may be a polynuclear platinum complex with an integer n>1; and (C) 0 wt % to 10 wt % of at least one additive.

Description

[0001] The invention relates to preparations of platinum complexes and to the use of said preparations for producing platinum layers on substrates.

[0002] WO90 / 07561 A1 discloses a compound of the formula LM[O(CO)R] 2 A platinum complex of wherein L represents a nitrogen-free cyclic polyolefin ligand, preferably cyclooctadiene (COD) or pentamethylcyclopentadiene, and M represents platinum or iridium, and wherein R represents a benzyl group, an aryl group or an alkyl group having four or more carbon atoms, particularly preferably a phenyl group. The platinum complex is used as a fuel additive.

[0003] The object of the present invention is to find formulations which can be used for producing platinum layers on substrates, including temperature-sensitive substrates.

[0004] This object can be achieved by providing a preparation, which comprises or consists of the following components:

[0005] (A) 30 to 90 wt % (weight percent, wt %) of at least one organic solvent;

[0006] (B) 10 to 70 wt% of at least one [L1L2Pt[O(CO)R1]X] n Type platinum complex,

[0007] wherein L1 and L2 represent identical or different monoolefin ligands or together represent a compound L1L2 acting as a diene ligand,

[0008] wherein X is selected from bromide, chloride, iodide and -O(CO)R2,

[0009] wherein -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or preferably C8-C18 monocarboxylic acid groups, or together represent non-aromatic C8-C18 dicarboxylic acid groups -O(CO)R1R2(CO)O-,

[0010] wherein n=1 is a mononuclear platinum complex, or wherein in the presence of L1L2 and / or -O(CO)R1R2(CO)O-, an integer n>1 may be a polynuclear platinum complex; and

[0011] (C) 0 to 10 wt % of at least one additive.

[0012] In a preferred embodiment, the formulation is such that 10% to 70% by weight of component (B) consists of at least one [L1L2Pt[O(CO)R1]X] n Type platinum complex, wherein L1 and L2 together represent a compound L1L2 acting as a diene ligand,

[0013] wherein X is selected from bromide, chloride, iodide and -O(CO)R2,

[0014] wherein -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or preferably C8-18 monocarboxylic acid groups, and

[0015] Here, it is a mononuclear platinum complex with n=1 or a polynuclear platinum complex with an integer n>1. L1L2 here represents a compound that serves as a diene ligand.

[0016] In the case of a polynuclear platinum complex, the number n generally represents an integer in the range of, for example, 2 to 5. In other words, the integer n>1 is generally in the range of 2 to 5; in particular, n is then equal to 2 and is a binuclear platinum complex. In particular, the compound L1L2 or the dicarboxylic acid group -O(CO)R1R2(CO)O- acts as a bridging ligand in the polynuclear platinum complex. X can also play a bridging role.

[0017] Platinum exists in platinum complexes in the oxidation state +2.

[0018] In the preparations according to the invention, component (B) is present dissolved in component (A). In the case of the presence of optional component (C) in the preparations according to the invention, this component (C) is therefore also preferably present dissolved in component (A). In other words, in the absence of optional component (C), the preparations according to the invention are organic solutions, more precisely, non-colloidal organic solutions; the same applies in the case of the presence of optional component (C) in the preferred form, i.e. dissolved in component (A).

[0019] The preparation according to the invention comprises 30% to 90% by weight of at least one organic solvent (A). The one or several organic solvents can be selected from a variety of conventional organic solvents, since the platinum complex is well to unlimitedly soluble in such organic solvents. Suitably, the one or several organic solvents are substantially volatile under the processing conditions of the preparation according to the invention, which applies in particular to the stage after the preparation according to the invention is applied to the substrate. Typically, the boiling point of the one or several organic solvents is in the range of 50° C. to 200° C. or higher, for example 50° C. to 300° C. Examples of the organic solvent (A) include aliphatics and alicyclics each having 6 to 12 carbon atoms; halogenated hydrocarbons such as dichloromethane, trichloromethane and tetrachloromethane; aromatic compounds; aromatic aliphatics such as toluene or xylene; alcohols such as ethanol, n-propanol, isopropanol; ethers; glycol ethers such as mono-C1-C4 alkyl glycol ethers and di-C1-C4 alkyl glycol ethers, for example, ethylene glycol mono-C1-C4 alkyl ether, ethylene glycol di-C1-C4 alkyl ether, diethylene glycol mono-C1-C4 alkyl ether, diethylene glycol di-C1-C4 alkyl ether, propylene glycol mono-C1-C4 alkyl ether, propylene glycol di-C1-C4 alkyl ether, dipropylene glycol mono-C1-C4 alkyl ether and dipropylene glycol di-C1-C4 alkyl ether; esters having 2 to 12 carbon atoms; and ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone. Preferred here are aromatic aliphatics such as toluene or xylene, alcohols such as ethanol, n-propanol and isopropanol and glycol ethers such as mono-C1-C4-alkyl glycol ethers and di-C1-C4-alkyl glycol ethers, for example ethylene glycol mono-C1-C4-alkyl ether, ethylene glycol di-C1-C4-alkyl ether, diethylene glycol mono-C1-C4-alkyl ether, diethylene glycol di-C1-C4-alkyl ether, propylene glycol mono-C1-C4-alkyl ether, propylene glycol di-C1-C4-alkyl ether, dipropylene glycol mono-C1-C4-alkyl ether and dipropylene glycol di-C1-C4-alkyl ether. Particularly preferably, component (A) or the at least one organic solvent (A) consists of at least one alcohol, in particular at least one of the alcohols mentioned by way of example, and / or of at least one glycol ether, in particular at least one of the glycol ethers mentioned by way of example. Particularly preferred as component (A) are corresponding mixtures of 30% to 70% by weight of alcohols and the remainder 100% by weight of glycol ethers.

[0020] The preparation according to the invention comprises 10 to 70% by weight of at least one [L1L2Pt[O(CO)R1]X] n The platinum content of the preparation according to the invention originating from the at least one platinum complex can be, for example, in the range from 2.5% to 25% by weight.

[0021] In a first embodiment of the mononuclear platinum complex of the type L1L2Pt[O(CO)R1]X, L1 and L2 are identical or different monoolefin ligands; X represents bromide, chloride, iodide or -O(CO)R2; and -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or preferably C8-C18 monocarboxylic acid groups, preferably excluding phenylacetic acid groups in each case.

[0022] In a second and simultaneously preferred embodiment of the mononuclear platinum complex of the type L1L2Pt[O(CO)R1]X, L1 and L2 are together the compound L1L2 which acts as a diene ligand at the same platinum central atom; X represents bromide, chloride, iodide or -O(CO)R2; and -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or preferably C8-C18 monocarboxylic acid groups, preferably excluding phenylacetic acid groups in each case.

[0023] In a third embodiment of the mononuclear platinum complex of type L1L2Pt[O(CO)R1]X, L1 and L2 are identical or different monoolefin ligands; X represents -O(CO)R2; -O(CO)R1 and -O(CO)R2 together represent a non-aromatic C8-C18 dicarboxylic acid group -O(CO)R1R2(CO)O- acting as a bidentate ligand at the same platinum central atom.

[0024] In a fourth embodiment of the mononuclear platinum complex of type L1L2Pt[O(CO)R1]X, L1 and L2 are together a compound L1L2 acting as a diene ligand at the same platinum central atom; X represents -O(CO)R2; and -O(CO)R1 and -O(CO)R2 together represent a non-aromatic C8-C18 dicarboxylic acid group -O(CO)R1R2(CO)O- acting as a bidentate ligand at the same platinum central atom.

[0025] In a first and at the same time preferred embodiment of a binuclear or polynuclear platinum complex of the type [L1L2Pt[O(CO)R1]X]n, L1 and L2 together represent a compound L1L2 bridging different platinum centers, which compound acts as a diene ligand; X represents bromide, chloride, iodide or -O(CO)R2; n represents 2, 3, 4 or 5, preferably 2; and -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or preferably C8-C18 monocarboxylic acid groups, preferably excluding phenylacetic acid groups in each case.

[0026] In [L1L2Pt[O(CO)R1]X] nIn a second embodiment of the binuclear or polynuclear platinum complex of the type, L1 and L2 together represent a compound L1L2 bridging different platinum centers, which acts as a diene ligand; X represents -O(CO)R2; n represents 2, 3, 4 or 5, preferably 2; and -O(CO)R1 and -O(CO)R2 together represent a non-aromatic C8-C18 dicarboxylic acid group -O(CO)R1R2(CO)O- bridging different platinum centers.

[0027] In [L1L2Pt[O(CO)R1]X] n In a third embodiment of the binuclear or polynuclear platinum complex of the type, L1 and L2 represent the same or different monoolefin ligands; X represents -O(CO)R2; n represents 2, 3, 4 or 5, preferably 2; and -O(CO)R1 and -O(CO)R2 together represent a non-aromatic C8-C18 dicarboxylic acid group -O(CO)R1R2(CO)O- bridging different platinum centers.

[0028] The platinum complexes can be present in the preparations according to the invention in individualized form, but also in socialized form, ie individually or as separate compounds each containing [L1L2Pt[O(CO)R1]X] n There are mixtures of several different species of the type.

[0029] L1 and L2 individually represent identical or different, preferably identical, monoolefins, or together represent polyolefinically unsaturated compounds L1L2, for example dienes or polyolefins which can serve as diene ligands. Preference is given here to polyolefinically unsaturated compounds L1L2 which can serve as diene ligands.

[0030] Examples of monoolefins include C2-C18 hydrocarbons having a single olefinically unsaturated double bond. These may be straight-chain compounds, branched compounds or compounds having a cyclic structure. Preference is given to pure hydrocarbons; however, the presence of heteroatoms is also possible, for example also in the form of functional groups. Preferred examples of monoolefins include ethylene, propylene and cyclohexene.

[0031] Examples of dienes or L1L2 type compounds that can act as diene ligands include hydrocarbons such as COD (1,5-cyclooctadiene), NBD (norbornadiene), COT (cyclooctatetraene) and 1,5-hexadiene, in particular COD and NBD. Preference is given to pure hydrocarbons; however, the presence of heteroatoms is also possible, for example also in the form of functional groups.

[0032] X may represent bromide, chloride, iodide or -O(CO)R2, preferably chloride or -O(CO)R2, especially -O(CO)R2.

[0033] The non-aromatic monocarboxylic acid groups -O(CO)R1 and -O(CO)R2 individually represent in each case identical or different non-aromatic C6-C18 monocarboxylic acid groups or preferably C8-C18 monocarboxylic acid groups, preferably excluding in each case the phenylacetic acid group, or they together represent non-aromatic C8-C18 dicarboxylic acid groups of the type -O(CO)R1R2(CO)O-. The term "non-aromatic" as used in this text excludes purely aromatic monocarboxylic acid and dicarboxylic acid groups, but does not exclude aromatic aliphatic monocarboxylic acid groups and dicarboxylic acid groups whose carboxyl function is bonded to an aliphatic carbon. -O(CO)R1 and -O(CO)R2 each preferably do not represent a phenylacetic acid group. Preferably, -O(CO)R1 and -O(CO)R2 represent identical or different non-aromatic C6-C18 monocarboxylic acid groups or in particular C8-18 monocarboxylic acid groups, preferably excluding phenylacetic acid groups in each case; particularly preferably, -O(CO)R1 and -O(CO)R2 represent identical non-aromatic C6-C18 monocarboxylic acid groups or in particular C8-C18 monocarboxylic acid groups and preferably do not represent phenylacetic acid groups.

[0034] Examples of nonaromatic C6-C18 monocarboxylic acids or preferably C8-C18 monocarboxylic acids having -O(CO)R1 or -O(CO)R2 groups include the isomeric hexanoic acids (including n-hexanoic acid), the isomeric heptanoic acids (including n-heptanoic acid), the isomeric octanoic acids (including n-octanoic acid and 2-ethylhexanoic acid), the isomeric nonanoic acids (including n-nonanoic acid) and the isomeric decanoic acids (including n-decanoic acid), to name just a few. These include not only straight-chain representatives, but also such representatives with branched and / or cyclic structures, such as 2-ethylhexanoic acid, cyclohexanecarboxylic acid and neodecanoic acid. The R1 and R2 groups, each bonded to the carboxyl group, contain 5 to 17 and 7 to 17 carbon atoms, respectively; benzyl is preferably excluded in each case here.

[0035] Examples of non-aromatic C8-C18 dicarboxylic acids of the HOOCR1R2COOH type include correspondingly substituted malonic acid, correspondingly substituted 1,1-cyclobutanedicarboxylic acid, cyclohexanedicarboxylic acid, to name a few. The structural element -R1R2- carrying the two carboxyl groups comprises 6 to 16 carbon atoms.

[0036] Preferred examples of the platinum complex (B) include [(COD)Pt[O(CO)R1] 2 ] n and [(NBD)Pt[O(CO)R1] 2 ] n , wherein n is 1 or 2, in particular 1, and wherein R1 represents a non-aromatic C5-C17 hydrocarbon group or a C7-C17 hydrocarbon group, preferably excluding benzyl.

[0037] Platinum complexes [L1L2Pt[O(CO)R1]X] can be prepared in a simple manner by ligand exchangen , in particular no silver carboxylates are used here. The preparation method comprises mixing or suspending or emulsifying a two-phase system. One phase here comprises [L1L2PtX 2 ] n A type reactant, X is selected from bromide, chloride and iodide, preferably chloride, either as such or in the form of an organic solution of such reactant which is at least substantially immiscible with water. Preferred reactants include [L1L2PtCl 2 ] n , n is an integer from 1 to 5, in particular n=1. In addition to aromatic compounds and chlorinated hydrocarbons such as toluene, xylene, dichloromethane, chloroform and tetrachloromethane, examples of suitable at least substantially water-immiscible organic solvents also include oxygen-containing solvents, such as corresponding ketones, esters and ethers that are immiscible with water. In contrast, the other phase comprises an aqueous solution of an alkali metal salt (in particular a sodium salt or potassium salt) and / or a magnesium salt of a C6-C18 monocarboxylic acid or a C8-C18 monocarboxylic acid of the R1COOH type, and, if necessary, an aqueous solution of an alkali metal salt and / or a magnesium salt of the R2COOH type or an aqueous solution of a corresponding alkali metal salt and / or a magnesium salt of a C8-C18 dicarboxylic acid of the HOOCR1R2COOH type. The type of one or more carboxylates is selected depending on the type of platinum complex to be prepared or the type of platinum complex group to be prepared. The two phases are mixed intensively to form a suspension or emulsion, for example by shaking and / or stirring. In order to maintain the suspension or emulsion state, mixing is carried out, for example, over a period of 0.5 hours to 24 hours, for example at a temperature in the range of 20° C. to 50° C. A ligand exchange takes place in this process, wherein the formed platinum complex or complexes are dissolved in the organic phase, while the likewise formed alkali metal X salt or MgX 2 The salt is dissolved in the aqueous phase. After the suspension or emulsification is complete, the organic phase and the aqueous phase are separated from one another. The platinum complex or complexes formed can be obtained from the organic phase and, if necessary, subsequently purified by conventional methods.

[0038] This can be done, for example, by replacing (COD)PtCl 2 The (COD)Pt[O(CO)CH(C 2 H 5 )C 4 H 9 ] 2 After the emulsification is completed, the salt solution formed by ligand exchange can be separated from the dichloromethane phase, and (COD)Pt[O(CO)CH(C 2 H 5 )C 4 H 9 ] 2, and, if necessary, purified by conventional purification methods. Similarly, for example, the platinum complex (COD)Pt[O(CO)CH(C 2 H 5 )C 4 H 9 ]Cl.

[0039] In addition to the above-mentioned solubility in customary organic solvents, an important property is the relatively low decomposition temperature of the platinum complex or complexes (B), for example, the decomposition already begins at 150° C. to 250° C., usually not above 200° C. This combination of properties allows such platinum complexes to be used as component (B) of the preparations according to the invention for producing platinum layers on substrates; for this type of use, the preparations according to the invention are plating agents (coating agents), that is to say, the preparations are then prepared as and can be used as plating agents.

[0040] The formulations according to the invention contain 0% to 10% by weight, preferably 0% to 3% by weight, of at least one additive (C). Thus, the formulations according to the invention may be free of additives or contain up to 10% by weight of at least one additive. Examples of additives include wetting additives, rheological additives, defoamers, oxygen scavengers, additives for influencing surface tension, odorants.

[0041] The preparations according to the invention can be prepared by simply mixing components (A), (B) and (if desired) (C). The person skilled in the art selects the quantitative ratio of the components which is adapted to the respective intended use and / or the application method used therein.

[0042] The preparations according to the invention can be used to produce platinum layers on substrates, in particular also on temperature-sensitive substrates. In this case, the preparations according to the invention can first be used to produce coatings (coatings), which can then be subjected to thermal decomposition. During the thermal treatment, the coating decomposes to form platinum, i.e. the coating is ultimately converted into a platinum layer. The invention therefore also relates to a method for producing a platinum layer on a substrate, which comprises the following steps:

[0043] (1) applying a coating made from the preparation according to the invention to a substrate, and

[0044] (2) Thermally decompose the plating layer to form a platinum layer.

[0045] The substrate on which the coating is to be provided in step (1) may be a substrate comprising various materials. The substrate may here comprise only one or several materials. Examples of materials include, but are not limited to: glass; carbide substrates, such as titanium carbide, molybdenum carbide, tungsten carbide, silicon carbide; nitride substrates, such as aluminum nitride, titanium nitride, silicon nitride; boride substrates, such as titanium boride, zirconium boride; ceramic substrates, including substrates based on oxide ceramics and substrates generally used as catalyst supports; semiconductor substrates, such as silicon substrates; metals; plastics; modified or unmodified polymers of natural origin; carbon substrates; wood; cardboard and paper. The substrate may be provided with a coating on the inner surface and / or the outer surface or on a portion of the inner surface and / or the outer surface.

[0046] When the coating is prepared according to step (1), an application method known per se can be used.

[0047] The first application method is impregnation. Here, the substrate to be provided with a coating or ultimately a platinum layer is immersed in and then leached out of the preparation according to the invention. Preferably, during the impregnation, the proportion of component (A) is in the range of 30% to 90% by weight of the preparation according to the invention, and the proportion of component (B) is in the range of 10% to 70% by weight.

[0048] A second application method is spraying. Here, the substrate to be provided with a coating or ultimately a platinum layer is sprayed with the formulation according to the invention using conventional spraying tools. Examples of spraying tools are pneumatic spray guns, airless spray guns, rotary atomizers or the like. Preferably, during spraying, the proportion of component (A) is in the range of 50% to 90% by weight of the formulation according to the invention, and the proportion of component (B) is in the range of 10% to 50% by weight.

[0049] A third application method is printing. Here, the substrate to be provided with a coating or ultimately a platinum layer is printed with the preparation according to the invention. In this case, a preferred printing method is inkjet printing. In this case, a further preferred printing method is screen printing. Preferably, during printing, the proportion of component (A) is in the range of 50% to 90% by weight of the preparation according to the invention, and the proportion of component (B) is in the range of 10% to 50% by weight.

[0050] A fourth application method is application by means of an application tool, such as a brush, a brush, a felt or a cloth, which is impregnated with the preparation according to the invention. Here, the preparation according to the invention is transferred from the application tool to the substrate on which the coating or ultimately the platinum layer is to be provided. Preferably, in such an application technique, the proportion of component (A) is in the range of 30% to 90% by weight of the preparation according to the invention, and the proportion of component (B) is in the range of 10% to 70% by weight.

[0051] The coating applied by the formulation according to the invention comprising at least one [L1L2Pt[O(CO)R1]X] n The method comprises forming a layer of a platinum complex of the type described in the present invention and partially or completely removing the organic solvent, and then subjecting it or the dried residue to thermal decomposition to form metallic platinum in the form of a layer. The thermal treatment for thermal decomposition comprises heating to a body temperature above the decomposition temperature of the at least one platinum complex. In the presence of several different [L1L2Pt[O(CO)R1]X] n In the case of platinum complexes of type (A), the person skilled in the art will select a body temperature which is above the decomposition temperature of the platinum complex of type (B) with the highest decomposition temperature. Typically, for this purpose, heating is carried out, for example briefly, to a body temperature above the decomposition temperature, for example to a body temperature in the range of 150° C. to 200° C. or 150° C. to 250° C. or higher, for example up to 1000° C., within a period of 1 minute to 30 minutes. The heating can in particular be carried out in a furnace and / or by infrared radiation. Typically, a body temperature is selected which is slightly above the relevant decomposition temperature. Typically, the heating, more precisely, is carried out while the body temperature is maintained for no more than 15 minutes.

[0052] It is also advantageous when producing a platinum layer with the aid of the formulation according to the invention that it is not necessary to use formulations containing colloidal platinum or nano-platinum, so that possible risks associated with this can be avoided. In addition, in the second and third of the above-mentioned application methods, clogging of the application tool, more precisely of the fine openings or nozzles of the spray application tool or inkjet nozzle, can be avoided by using the formulation according to the invention; finally, there is no problem of drying or agglomeration of the colloidal platinum or nano-platinum.

[0053] The platinum layers thus obtained are characterized by a high metallic luster comparable to that of a mirror, provided that a substrate with a smooth, not too rough surface is used; the platinum layer is homogeneous in the sense of a smooth, particle-free outer surface. The thickness of the platinum layer obtainable with the method according to the invention may, for example, be in the range from 50 nm to 5 μm, and the platinum layer may be of a planar nature, with or without the desired interruptions within the plane, or may have a desired pattern or design. As can be seen from the above examples of substrates, it is even possible to produce platinum layers on temperature-sensitive substrates, i.e., substrates which are temperature-unstable above 200° C., for example; these may be temperature-sensitive polymer substrates, for example based on polyolefins or polyesters. Example

[0054] Example 1 (Slide made of glass equipped with a platinum layer) :

[0055] Stir 65 mmol of (COD)PtCl 2A solution of 260 mmol of sodium 2-isodecanoate in 500 ml of water was added. The two-phase mixture was emulsified with vigorous stirring at 20° C. for 24 hours. During this time, the dichloromethane phase turned yellow.

[0056] The dichloromethane phase was separated and the solvent was distilled off. The viscous yellow residue was dissolved in 150 ml of petroleum gasoline (40-60), and the solution was dried over magnesium sulfate and filtered. The petroleum gasoline was then completely distilled off. A viscous yellow residue (COD)Pt[O(CO)(CH 2 ) 5 C(CH 3 ) 3 ] 2 .

[0057] 10 g of the yellow residue were dissolved in 20 g of a solvent / additive mixture (50% by weight of ethanol, 49.9% by weight of propylene glycol monopropyl ether, 0.1% by weight of BYK-333 (surface additive from BYK). The solution containing 10% by weight of platinum was sprayed onto a glass slide using a spray gun. The coated glass slide was heated to an object temperature of 200° C. in a laboratory furnace and kept at this temperature for 15 minutes. A shiny, conductive platinum layer formed on the glass slide.

[0058] Examples 2a to 2d (Equipping an Alumina Flake with a Platinum Layer) :

[0059] 2a: An unglazed aluminum oxide sheet (50 mm x 50 mm) was immersed in the solution of Example 1 and heated to an object temperature of 200° C. in a laboratory furnace after leaching and kept at this temperature for 15 minutes. A shiny platinum conductive layer was formed on the sheet.

[0060] 2b: Experiment 2a was repeated at an object temperature of 900°C to obtain similar results.

[0061] 2c and 2d: Experiments 2a and 2b were repeated with glazed flakes made of aluminum oxide, similar results being obtained in each case, but here, unlike the results of experiments 2a and 2b, in the form of a mirror-like conductive layer made of platinum.

[0062] Example 3 (Polyurethane hose equipped with platinum layer) :

[0063] A 5 mm thick polyurethane tube was drawn three times in succession through a felt sheet impregnated with the solution from Example 1. The hose coated in this way was heated in a laboratory furnace to an object temperature of 175° C. and kept at this temperature for 5 minutes. A shiny, conductive platinum layer formed on the hose.

[0064] Example 4 (Polyimide film equipped with a patterned platinum layer) :

[0065] Printing with the solution from Example 1 with a resolution of 1270 dpi using an inkjet printer in a zigzag design Film (polyimide). The film printed in this way was heated in a laboratory furnace to an object temperature of 200° C. and kept at this temperature for 5 minutes. A shiny platinum conductive layer was formed on the film in the shape of a meander design with a conductor track width of 2.5 mm.

[0066] Example 5 (Slide made of glass equipped with a platinum layer) :

[0067] Similar to Example 1, 32.5 mmol of (COD)PtCl 2 The mixture was reacted with 130 mmol of sodium cyclohexanoate in 200 ml of water in 100 ml of dichloromethane to obtain a yellow residue (COD)Pt[O(CO)C 6 H 11 ] 2 .

[0068] 2 g of the yellow residue were dissolved in 4.86 g of dipropylene glycol monopropyl ether. A glass slide was immersed in this solution containing 10% by weight of platinum and, after leaching, heated in a laboratory furnace to an object temperature of 200° C. and kept at this temperature for 15 minutes. A shiny platinum conductive layer was formed on the slide.

[0069] Example 6 (Polyimide film equipped with a platinum layer) :

[0070] Similar to Example 1, 65 mmol of (COD)PtCl 2 The mixture was reacted with 260 mmol of sodium 2-ethylhexanoate in 500 ml of water in 100 ml of dichloromethane to obtain a yellow residue (COD)Pt[O(CO)CH(C 2 H 5 )C 4 H 9 ] 2 .

[0071] 10 g of the yellow residue was dissolved in a mixture of 15 g of propylene glycol monopropyl ether and 15 g of ethanol. A 10 mm x 40 mm strip of the film was dipped into the solution containing 8.2 wt. % platinum and, after leaching, heated in a laboratory furnace to an object temperature of 200° C. and kept at this temperature for 3 minutes. A shiny, conductive platinum layer was formed on the film.

[0072] Example 7 (Enameled Alumina Sheet with Platinum Layer) :

[0073] The glazed alumina flakes were dipped into the solution of Example 6 and, after leaching, heated in a laboratory furnace to an object temperature of 200° C. and kept at this temperature for 5 minutes. A shiny, conductive layer of platinum was formed on the flakes.

[0074] Example 8 (Polyimide film equipped with a platinum layer) :

[0075] Similar to Example 1, 27.3 mmol of (NBD)PtCl 2 The mixture was reacted with 110 mmol of sodium 2-ethylhexanoate in 100 ml of water in 100 ml of dichloromethane to obtain a yellow residue (NBD)Pt[O(CO)CH(C 2 H 5 )C 4 H 9 ] 2 The yellow residue was further processed similarly to Example 6 to obtain a platinum conductive layer provided with a glossy film.

Claims

1. A preparation comprising or consisting of the following components: (A) 30% to 90% by weight of at least one organic solvent; (B) 10 to 70 wt% of at least one [L1L2Pt[O(CO)R1]X] n Type platinum complex, wherein L1L2 together represent a compound acting as a diene ligand, Wherein X is -O(CO)R2, wherein -O(CO)R1 and -O(CO)R2 represent the same or different non-aromatic C6-C18 monocarboxylic acid groups, and It is a mononuclear platinum complex with n=1 or a polynuclear platinum complex with an integer n>1; and (C) 0 to 10 wt % of at least one additive.

2. The formulation according to claim 1, wherein -O(CO)R1 and -O(CO)R2 represent the same or different non-aromatic C8-C18 monocarboxylic acid groups.

3. The formulation of claim 1, wherein the integer n>1 is in the range of 2 to 5.

4. The preparation according to claim 1, which is in the form of a non-colloidal organic solution.

5. The preparation according to claim 3, which is in the form of a non-colloidal organic solution. 6 . The preparation according to claim 1 , having a platinum content in the range from 2.5% to 25% by weight originating from the at least one platinum complex.

7. The formulation according to one of claims 1 to 5, wherein the at least one platinum complex has the formula [(COD)Pt[O(CO)R1]2] n or [(NBD)Pt[O(CO)R1]2] n , wherein n is 1 or 2, and wherein R1 is a non-aromatic C5-C17 hydrocarbon group.

8. The formulation of claim 7, wherein R1 is a non-aromatic C7-C17 hydrocarbon group.

9. Formulation according to one of claims 1 to 5, 8, wherein the decomposition temperature of the at least one platinum complex is in the range of 150°C to 200°C.

10. Formulation according to one of claims 1 to 5, 8, wherein the decomposition temperature of the at least one platinum complex is in the range of 150°C to 250°C.

11. Formulation according to one of claims 1 to 5, 8, wherein the at least one additive (C) is selected from the group consisting of wetting additives, rheological additives, defoamers, oxygen scavengers, additives for influencing surface tension, odorants.

12. A method for preparing a platinum layer on a substrate, the method comprising the steps of: (1) applying a coating made of a preparation according to one of claims 1 to 11 to a substrate, and (2) Thermally decomposing the plated layer to form a platinum layer.

13. The method according to claim 12, wherein the substrate comprises one or more materials selected from the group consisting of glass, ceramics, semiconductor substrates, metals, plastics, modified or unmodified polymers of natural origin, carbon substrates, cardboard and paper.

14. The method according to claim 12, wherein the substrate is provided with the coating on an inner surface and / or an outer surface or on a portion of an inner surface and / or a portion of an outer surface.

15. The method according to claim 13, wherein the substrate is provided with the coating on an inner surface and / or an outer surface or on a portion of an inner surface and / or an outer surface.

16. The method according to one of claims 12 to 15, wherein the application method for producing the coating is selected from the group consisting of dipping, spraying, printing, application by means of a brush, application by means of a felt and application by means of a cloth.

17. The method according to one of claims 12 to 15, wherein the application method for producing the coating is application by means of a brush.

18. The method according to claim 12, wherein the coating applied in step (1) is first dried and the organic solvent is partially or completely removed in the process and then the coating is subjected to the thermal decomposition in step (2).

19. The method according to claim 16, wherein the coating applied in step (1) is first dried and the organic solvent is partially or completely removed in the process, and then the coating is subjected to the thermal decomposition in step (2).

20. The method according to claim 17, wherein the coating applied in step (1) is first dried and the organic solvent is partially or completely removed in the process, and then the coating is subjected to the thermal decomposition in step (2).

21. The method according to one of claims 12 to 15, 19 to 20, wherein the thermal decomposition in step (2) is performed by a thermal treatment comprising heating to a body temperature above the decomposition temperature of the at least one platinum complex.

22. The method of claim 18, wherein the thermal decomposition in step (2) is performed by heat treatment, the heat treatment comprising heating to a body temperature higher than a decomposition temperature of the at least one platinum complex.

23. The method of claim 21, wherein said heating to said object temperature is performed in a furnace.

24. The method of claim 21, wherein said heating to said object temperature is performed by infrared radiation.

25. The method of claim 22, wherein said heating to said object temperature is performed in a furnace.

26. The method of claim 22, wherein said heating to said object temperature is performed by infrared radiation.

27. The method according to one of claims 12 to 15, 19 to 20, 22 to 26, wherein The platinum layer is 50 nm to 5 μm thick.