EP0677590A1 - Precious metal-containing material for decorative articles and process for its manufacture - Google Patents
Precious metal-containing material for decorative articles and process for its manufacture Download PDFInfo
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- EP0677590A1 EP0677590A1 EP95104115A EP95104115A EP0677590A1 EP 0677590 A1 EP0677590 A1 EP 0677590A1 EP 95104115 A EP95104115 A EP 95104115A EP 95104115 A EP95104115 A EP 95104115A EP 0677590 A1 EP0677590 A1 EP 0677590A1
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- European Patent Office
- Prior art keywords
- precious metal
- jewelry
- weight
- containing material
- gold
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0094—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with organic materials as the main non-metallic constituent, e.g. resin
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/059—Making alloys comprising less than 5% by weight of dispersed reinforcing phases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49588—Jewelry or locket making
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12049—Nonmetal component
Definitions
- the invention relates to a noble metal-containing material for jewelry made of powdered noble metals and a non-metallic additive. It also relates to a process for producing these materials and the jewelry items.
- Jewelry has always been made from precious metals such as gold, silver, platinum, palladium and especially from their alloys.
- precious metals such as gold, silver, platinum, palladium and especially from their alloys.
- a number of noble metal alloys are known which are used for such purposes, the noble metal portion normally predominating.
- the gold-containing alloys in particular are divided into 8,9,14,18 and 20 carat alloys according to their activity (i.e. their gold content).
- the addition of non-precious metals is necessary to improve the mechanical properties of the jewelry alloys, such as hardness and abrasion resistance.
- Some of these alloys contain heavy metal components, such as nickel or lead, which can cause allergies. There is therefore a need for heavy metal-free jewelry materials.
- a jewelry material which contains a glass component in addition to precious metal.
- this material has the disadvantage that only about 5-6% by weight of glass can be added without drastically impairing the processing properties of the material.
- the material due to the glass component, the material contains heavy metal oxides of lead, zinc or tin, which can trigger allergies.
- the jewelry industry strives to use lighter precious metal materials and hollow jewelry parts in order to increase the wearing comfort through a lower weight (e.g. earrings, pendants etc.).
- Galvanic hollow jewelry has become increasingly important in this sector in recent years. Methods for producing electroformed hollow gold jewelry are described, for example, in DE-PS 33 09 397. In general, however, hollow jewelry has the disadvantage that it has a low strength and is easily deformed under impact and pressure. It also sounds hollow and tinny on impact.
- the material consists of 33 to 99% by weight of noble metal powder or alloy powder containing high noble metals with more than 60% by weight of noble metal, 1 to 67% by weight of a thermosetting plastic and 0 to 10% by weight of a finely divided, inorganic Filler exists.
- thermosets can be used as curable organic plastics. However, casting resins which can be cured by appropriate additives are preferably used.
- the materials known in plastics technology can be used as fillers, in particular finely dispersed silicas, silicates or aluminum powder.
- Gold, silver or platinum are used in particular as precious metals, preferably in a powder size of 1 to 100 ⁇ m.
- the precious metals can have a few percent of toxic non-precious metals that are harmless.
- the materials and jewelry articles are advantageously produced by mixing the precious metal powder and the thermosetting plastic together, introducing them into a shape corresponding to the piece of jewelry or into the cavities of a hollow jewelry and allowing them to harden by the action of chemical reagents and / or energy.
- the precious metal-containing material is liquid to pasty, homogeneous in its composition and can be cast and shaped as required. After a certain time it hardens, whereby solid, true-to-size pieces of jewelry are obtained, which can then also be electroplated with a layer of precious metal.
- Organic casting resins which cure at room temperature and have a sufficiently long pot life are advantageously used as organic plastics.
- Examples are two-component epoxy resin systems, Two-component acrylate systems, polyurethanes, phenolic resins or silicone casting resins.
- the mixture is then poured into a silicone mold, for example, or placed in an electroformed piece of jewelry. During the subsequent curing at room temperature, there is no shrinkage and no blistering. Surprisingly, it has been shown that the shape accuracy of the mixture is excellent.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Adornments (AREA)
- Powder Metallurgy (AREA)
Abstract
Einen edelmetallhaltigen Werkstoff für Schmuckgegenstände mit geringem spezifischen Gewicht, großer Korrosionsbeständigkeit trotz niedrigem Edelmetallgehalt und frei von toxisch bedenklichen Bestandteilen besteht aus 33 bis 99 Gew.% Edelmetallpulver, 1 bis 67 Gew.% eines aushärtbaren organischen Kunststoffs und 0 bis 10 % Füllstoff.A precious metal-containing material for jewelry items with a low specific weight, great corrosion resistance despite a low precious metal content and free of toxic-harmful components consists of 33 to 99% by weight of precious metal powder, 1 to 67% by weight of a curable organic plastic and 0 to 10% filler.
Description
Die Erfindung betrifft einen edelmetallhaltigen Werkstoff für Schmuckgegenstände aus pulverförmigen Edelmetallen und einem nichtmetallischen Zusatzstoff. Außerdem betrifft sie ein Verfahren zur Herstellung dieser Werkstoffe und der Schmuckgegenstände.The invention relates to a noble metal-containing material for jewelry made of powdered noble metals and a non-metallic additive. It also relates to a process for producing these materials and the jewelry items.
Schmuckgegenstände werden seit altersher aus Edelmetallen, wie Gold, Silber, Platin, Palladium und insbesondere aus deren Legierungen gefertigt. Es sind eine Reihe von Edelmetall-Legierungen bekannt, die für solche Zwecke eingesetzt werden, wobei der Edelmetallanteil normalerweise überwiegt. Speziell die goldhaltigen Legierungen werden dabei nach ihrer Karätigkeit, (d.h. nach ihrem Goldanteil) in 8,9,14,18 und 20 Karat-Legierungen eingeteilt. Die Zulegierung von Nichtedelmetallen ist notwendig, um die mechanischen Eigenschaften der Schmucklegierungen, wie Härte und Abriebfestigkeit zu verbessern.Jewelry has always been made from precious metals such as gold, silver, platinum, palladium and especially from their alloys. A number of noble metal alloys are known which are used for such purposes, the noble metal portion normally predominating. The gold-containing alloys in particular are divided into 8,9,14,18 and 20 carat alloys according to their activity (i.e. their gold content). The addition of non-precious metals is necessary to improve the mechanical properties of the jewelry alloys, such as hardness and abrasion resistance.
Einige dieser Legierungen enthalten Schwermetall-Bestandteile, wie beispielsweise Nickel oder Blei, die Allergien auslösen können. Es besteht daher Bedarf an schwermetallfreien Schmuckwerkstoffen.Some of these alloys contain heavy metal components, such as nickel or lead, which can cause allergies. There is therefore a need for heavy metal-free jewelry materials.
Der Verkaufspreis von Schmuckgegenständen aus Edelmetallen ist heute zu einem hohen Maße vom Preis der darin enthaltenen Edelmetalle bestimmt. Die Schmuckindustrie ist daher bestrebt, Materialien mit niedrigem Edelmetallgehalt einzusetzen. Diesen Bestrebungen sind jedoch Grenzen gesetzt, da niederkarätige Legierungen (8 kt, 9 kt) keine zufriedenstellenden physikalischen und chemischen Eigenschaften mehr besitzen und insbesondere zur Oxydation und Korrosion neigen.The selling price of jewelry made of precious metals is today largely determined by the price of the precious metals they contain. The jewelry industry therefore strives to use materials with a low precious metal content. There are limits to these efforts, however, since low-carat alloys (8 kt, 9 kt) have none have more satisfactory physical and chemical properties and are particularly prone to oxidation and corrosion.
Aus der DE-PS 31 35 034 ist ein Schmuckwerkstoff bekannt, der neben Edelmetall eine Glaskomponente enthält. Dieser Werkstoff hat jedoch den Nachteil, daß nur etwa 5-6 Gew.% Glasanteile zugefügt werden können, ohne die Verarbeitungseigenschaften des Werkstoffs drastisch zu verschlechtern. Darüberhinaus enthält der Werkstoff aufgrund der Glaskomponente Schwermetalloxide von Blei, Zink oder Zinn, die Allergien auslösen können.From DE-PS 31 35 034 a jewelry material is known which contains a glass component in addition to precious metal. However, this material has the disadvantage that only about 5-6% by weight of glass can be added without drastically impairing the processing properties of the material. In addition, due to the glass component, the material contains heavy metal oxides of lead, zinc or tin, which can trigger allergies.
Weiterhin ist die Schmuckindustrie bestrebt, leichtere Edelmetallwerkstoffe und hohle Schmuckteile zu verwenden, um durch ein geringeres Gewicht den Tragekomfort zu erhöhen (z.B. Ohrringe, Anhänger etc.).Furthermore, the jewelry industry strives to use lighter precious metal materials and hollow jewelry parts in order to increase the wearing comfort through a lower weight (e.g. earrings, pendants etc.).
Auf diesem Sektor hat in den letzten Jahren der galvanische Hohlschmuck immer größere Bedeutung gewonnen. Verfahren zur Herstellung von galvanogeformtem Goldhohlschmuck sind beispielsweise in der DE-PS 33 09 397 beschrieben. Ganz allgemein besitzt Hohlschmuck jedoch den Nachteil, daß er eine geringe Festigkeit besitzt und bei Stoß und Druck leicht deformiert wird. Außerdem klingt er beim Aufprall hohl und blechern.Galvanic hollow jewelry has become increasingly important in this sector in recent years. Methods for producing electroformed hollow gold jewelry are described, for example, in DE-PS 33 09 397. In general, however, hollow jewelry has the disadvantage that it has a low strength and is easily deformed under impact and pressure. It also sounds hollow and tinny on impact.
Es war Aufgabe der vorliegenden Erfindung, einen edelmetallhaltigen Werkstoff für Schmuckgegenstände aus pulverförmigen Edelmetallen und einem nichtmetallischen Zusatzstoff zu entwickeln, der trotz niedrigem Edelmetallgehalt korrosionsbeständig ist, ein geringes spezifisches Gewicht aufweist, keine toxisch bedenklichen Bestandteile enthält und punzierbar ist. Außerdem sollte er zum Ausfüllen der Hohlräume von Hohlschmuck geeignet sein. Weiterhin sollte ein Verfahren zur Herstellung dieser Werkstoffe und der Schmuckgegenstände entwickelt werden.It was an object of the present invention to develop a noble metal-containing material for jewelry items made from powdered noble metals and a non-metallic additive which, despite the low noble metal content, is corrosion-resistant, has a low specific weight, contains no toxic questionable constituents and can be punctured. It should also be suitable for filling hollow spaces in hollow jewelry. Furthermore, a process for the production of these materials and the jewelry articles should be developed.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Werkstoff aus 33 bis 99 Gew.% Edelmetallpulver oder hochedelmetallhaltigem Legierungspulver mit mehr als 60 Gew.% Edelmetall, 1 bis 67 Gew.% eines duroplastischen Kunststoffs und 0 bis 10 Gew.% eines feinteiligen, anorganischen Füllstoffs besteht.This object is achieved according to the invention in that the material consists of 33 to 99% by weight of noble metal powder or alloy powder containing high noble metals with more than 60% by weight of noble metal, 1 to 67% by weight of a thermosetting plastic and 0 to 10% by weight of a finely divided, inorganic Filler exists.
Als aushärtbare organische Kunststoffe lassen sich hierfür alls Duroplaste einsetzen. Vorzugsweise verwendet man jedoch Gießharze, die sich durch entsprechende Zusätze aushärten lassen. Als Füllstoffe können die in der Kunststofftechnologie bekannten Materialien verwendet werden, insbesondere feindisperse Kieselsäuren, Silikate oder Aluminiumpulver.All thermosets can be used as curable organic plastics. However, casting resins which can be cured by appropriate additives are preferably used. The materials known in plastics technology can be used as fillers, in particular finely dispersed silicas, silicates or aluminum powder.
Als Edelmetalle verwendet man insbesondere Gold, Silber oder Platin, vorzugsweise in einer Pulvergröße von 1 bis 100 µm. Außerdem können den Edelmetallen einige Prozent toxisch unbedenklicher Nichtedelmetalle zulegiert sein.Gold, silver or platinum are used in particular as precious metals, preferably in a powder size of 1 to 100 μm. In addition, the precious metals can have a few percent of toxic non-precious metals that are harmless.
Die Herstellung der Werkstoffe und Schmuckgegenstände erfolgt vorteilhafterweise durch Zusammenmischen der Edelmetallpulver und des duroplastischen Kunststoffs, Einbringen in eine dem Schmuckstück entsprechende Form oder in die Hohlräume eines Hohlschmucks und Aushärtenlassen durch Einwirkung chemischer Reagenzien und/oder Energie.The materials and jewelry articles are advantageously produced by mixing the precious metal powder and the thermosetting plastic together, introducing them into a shape corresponding to the piece of jewelry or into the cavities of a hollow jewelry and allowing them to harden by the action of chemical reagents and / or energy.
Der edelmetallhaltige Werkstoff ist bei der Herstellung flüssig bis pastös, homogen in der Zusammensetzung und läßt sich beliebig gießen und formen. Nach einer gewissen Zeit härtet er aus, wobei man feste, maßgetreue Schmuckstücke erhält, die sich anschließend auch noch galvanisch mit einer Edelmetallschicht überziehen lassen.The precious metal-containing material is liquid to pasty, homogeneous in its composition and can be cast and shaped as required. After a certain time it hardens, whereby solid, true-to-size pieces of jewelry are obtained, which can then also be electroplated with a layer of precious metal.
Als organische Kunststoffe werden vorteilhafterweise kalthärtende organische Gießharze verwendet, die bei Raumtemperatur aushärten und eine genügend lange Topfzeit besitzen. Beispiele sind Zweikomponenten-Epoxidharzsysteme, Zweikomponenten-Acrylatsysteme, Polyurethane, Phenolharze oder Silikongießharze.Cold-curing organic casting resins which cure at room temperature and have a sufficiently long pot life are advantageously used as organic plastics. Examples are two-component epoxy resin systems, Two-component acrylate systems, polyurethanes, phenolic resins or silicone casting resins.
Zur Herstellung der Werkstoffe werden Edelmetallpulver und organisches Gießharz entsprechend dem gewünschten Edelmetallgehalt (z.B. 18 kt = 75 % Au, 25 % Gießharz) eingewogen und homogenisiert. Anschließend wird die Mischung beispielsweise in eine Silikonform gegossen oder in ein galvanogeformtes Schmuckstück eingebracht. Bei der anschließenden Aushärtung bei Raumtemperatur findet keine Schrumpfung und keine Blasenbildung statt. Überraschenderweise hat sich gezeigt, daß die Formabnahmegenauigkeit der Mischung ausgezeichnet ist.To manufacture the materials, precious metal powder and organic casting resin are weighed out and homogenized according to the desired precious metal content (e.g. 18 kt = 75% Au, 25% casting resin). The mixture is then poured into a silicone mold, for example, or placed in an electroformed piece of jewelry. During the subsequent curing at room temperature, there is no shrinkage and no blistering. Surprisingly, it has been shown that the shape accuracy of the mixture is excellent.
Die erfindungsgemäßen Werkstoffe besitzen bei gleichem Edelmetallgehalt eine geringere Dichte als die bekannten Schucklegierungen. Sie sind gut verarbeitbar und korrosionsbeständig.With the same noble metal content, the materials according to the invention have a lower density than the known jewelry alloys. They are easy to process and corrosion-resistant.
Folgende Beispiele sollen die Erfindung näher erläutern:
- 1. In einem Behälter werden folgende Komponenten eingewogen und gut homogenisiert:
7,50 gr Goldpulver (Korngröße ≦ 30 µm);
0,83 gr Methylmethacrylat/Styrolgießharz, Komponente 1;
1,67 gr Methylmethacrylat/Styrolgießharz, Komponente 2;
0,075 gr Härterpulver (Benzoylperoxid).
Man erhält ein pastöses, homogenes Gemisch, das zur weiteren Verarbeitung in eine Dosierspitze (Kartusche) gefüllt wird. Die Verarbeitungszeit nach der Härterzugabe beträgt 30 min. Es können hiermit 18-karätige Goldschmuckstücke hergestellt werden. - 2. Es werden getrennt zwei Komponenten hergestellt:
Komponente A
15,7 gr Goldpulver (Korngröße ≦ 45 µm);
4,3 gr Epoxidharz (Bisphenol-A-typ, Epoxiequivalentgewicht 180-250).
Komponente B
14,3 gr Goldpulver (Korngröße ≦ 45 µm);
5,7 gr Epoxihärter (organisches Amin, flüssig).
Nach dem Mischen der beiden Komponenten enthält man eine Gold-Epoxidharzpaste mit einem Goldgehalt von 75 % (18 kt). Das pastöse Material wird in eine Dosiervorrichtung gegeben und weiter verarbeitet. Die Topfzeit ist gleich der Verarbeitungszeit; sie beträgt ca. 30 Minuten. - 3. Die nach Beispiel 1 hergestellte pastöse Gold/Acrylharzzubereitung wird mittels einer Dosiervorrichtung in ein galvanogeformtes Hohlschmuckteil gefüllt. Blasenfreies Füllen erreicht man durch das Anlegen eines leichten Vakuums. Durch Feststellen der Füllmenge (Gewicht des Schmuckstückes vor und nach der Füllung) läßt sich die vollständige Füllung des Teiles überprüfen. Nach der Füllung wird überschüssiges Gold/Acrylharz durch Lösungsmittel entfernt, danach erfolgt die Aushärtung des Werkstoffes bei Raumtemperatur in ca. 24 h. Nach erfolgter Aushärtung kann das Schmuckstück punziert und gegebenenfalls galvanisch nachvergoldet werden. Das Schmuckstück weist einen massiven Klang auf und ist wesentlich unempfindlicher gegen Stoß- und Druckbelastung als das entsprechende ungefüllte Hohlschmuckteil.
- 4. Die nach Beispiel 1 hergestellte pastöse Gold/Acrylharzzubereitung wird mittels einer Dosierspitze direkt in die Silikongießform eines Schmuckstückes gefüllt. Die Silikonform wurde vorher mit einem Trennmittel (z.B. Teflonspray) behandelt. Die Formabnahmegenauigkeit der Zubereitung ist ausgezeichnet. Nach dem Einfüllen des Werkstoffes erfolgt die Aushärtung bei Raumtemperatur in ca. 24 h. Danach wird die Silikonform entfernt, der Angußkanal abgetrennt und das Schmuckstück galvanisch nachvergoldet. Dabei liegt die Schichtdicke des Überzuges zwischen 3-10 µm. Auch dickere Schichten sind möglich. Man erhält ein massives Schmuckstück, das keine Schwermetalle enthält und ein geringes Gewicht besitzt. Der Goldgehalt beträgt 75 % (18 kt).
- 5. In einem Behälter werden folgende Komponenten eingewogen und gut homogenisiert:
8,5 gr Platinpulver (Korngröße ≦ 30 µm);
0,5 gr Acrylatharz, Komponente 1, analog Beispiel 1;
1,0 gr Acrylatharz, Komponente 2, analog Beispiel 1;
0,045 gr Härterpulver (Benzoylperoxid).
Man erhält ein pastöses, homogenes Gemisch, das zur weiteren Verarbeitung in eine Dosierspritze (Kartusche) gefüllt wird.
Die weitere Verarbeitung der Zubereitung erfolgt analog der Beispiele 3 und 4. Man erhält Schmuckstücke mit einem Platingehalt von 850/1000.
- 1. The following components are weighed into a container and homogenized well:
7.50 g gold powder (grain size ≦ 30 µm);
0.83 gr methyl methacrylate / styrene casting resin, component 1;
1.67 g methyl methacrylate / styrene casting resin, component 2;
0.075 gr hardener powder (benzoyl peroxide).
A pasty, homogeneous mixture is obtained which is filled into a dosing tip (cartridge) for further processing. The processing time after adding the hardener is 30 min. It can be used to produce 18-carat gold jewelry. - 2. Two components are manufactured separately:
Component A
15.7 g gold powder (grain size ≦ 45 µm);
4.3 gram of epoxy resin (bisphenol A type, epoxy equivalent weight 180-250).
Component B
14.3 g gold powder (grain size ≦ 45 µm);
5.7 gr epoxy hardener (organic amine, liquid).
After mixing the two components, a gold epoxy resin paste with a gold content of 75% (18 kt) is contained. The pasty material is placed in a dosing device and processed further. The pot life is equal to the processing time; it is about 30 minutes. - 3. The paste-like gold / acrylic resin preparation produced according to Example 1 is filled into an electroformed hollow jewelry part by means of a metering device. Bubble-free filling is achieved by applying a slight vacuum. The complete filling of the part can be checked by determining the filling quantity (weight of the piece of jewelry before and after filling). After filling, excess gold / acrylic resin is removed by solvent, then the material is cured at room temperature in about 24 hours. After curing, the piece of jewelry can be hallmarked and, if necessary, galvanized again. The piece of jewelry has a massive sound and is much less sensitive to shock and pressure than the corresponding unfilled hollow jewelry part.
- 4. The pasty gold / acrylic resin preparation produced according to Example 1 is filled directly into the silicone mold of a piece of jewelry by means of a dosing tip. The silicone mold was previously treated with a release agent (eg Teflon spray). The shape accuracy of the preparation is excellent. After filling in the material, curing takes place at room temperature in about 24 hours. Then the silicone mold is removed, the sprue is cut off and the piece of jewelry is galvanized. The layer thickness of the coating is between 3-10 µm. Thicker layers are also possible. You get a solid piece of jewelry that contains no heavy metals and is light in weight. The gold content is 75% (18 kt).
- 5. The following components are weighed into a container and homogenized well:
8.5 gr of platinum powder (grain size ≦ 30 µm);
0.5 gr of acrylic resin, component 1, analogous to Example 1;
1.0 gr of acrylic resin, component 2, analogous to Example 1;
0.045 gr hardener powder (benzoyl peroxide).
A pasty, homogeneous mixture is obtained which is filled into a dosing syringe (cartridge) for further processing.
The further processing of the preparation is carried out analogously to Examples 3 and 4. Jewelery with a platinum content of 850/1000 is obtained.
Claims (4)
dadurch gekennzeichnet,
daß er aus 33 bis 99 Gew.% Edelmetallpulver oder hochedelmetallhaltigem Legierungspulvern mit mehr als 60 Gew.% Edelmetall, 1 bis 67 Gew.% eines duroplastischen Kunststoffs und 0 bis 10 Gew.% eines feinteiligen, anorganischen Füllstoffs besteht.Precious metal-containing material for jewelry made from powdered precious metals and a non-metallic additive,
characterized by
that it consists of 33 to 99% by weight of precious metal powder or alloy powder containing high precious metals with more than 60% by weight of precious metal, 1 to 67% by weight of a thermosetting plastic and 0 to 10% by weight of a finely divided, inorganic filler.
dadurch gekennzeichnet,
daß als Kunststoff aushärtbare Gießharze verwendet werden.Precious metal-containing material according to claim 1,
characterized by
that curable casting resins are used as plastic.
dadurch gekennzeichnet,
daß als Edelmetalle Gold, Silber oder Platin mit Teilchengrößen von 1 bis 100 µm eingesezt werden.Precious metal-containing material according to claim 1 or 2,
characterized by
that gold, silver or platinum with particle sizes of 1 to 100 microns are used as noble metals.
dadurch gekennzeichnet,
daß die Komponenten homogen vermischt, in eine dem Schmuckstück entsprechende Form oder in die Hohlräume eines Hohlschmucks eingebracht und durch Einwirken chemischer Reagenzien und/oder Energie ausgehärtet werden.A method of manufacturing a material according to claims 1 to 3,
characterized by
that the components are mixed homogeneously, placed in a shape corresponding to the piece of jewelry or in the cavities of a hollow jewelry and cured by the action of chemical reagents and / or energy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4412715 | 1994-04-13 | ||
| DE4412715A DE4412715C1 (en) | 1994-04-13 | 1994-04-13 | Noble metal material free from allergenic heavy metal for making jewellery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0677590A1 true EP0677590A1 (en) | 1995-10-18 |
Family
ID=6515288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95104115A Withdrawn EP0677590A1 (en) | 1994-04-13 | 1995-03-21 | Precious metal-containing material for decorative articles and process for its manufacture |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5578383A (en) |
| EP (1) | EP0677590A1 (en) |
| JP (1) | JPH07278603A (en) |
| BR (1) | BR9501548A (en) |
| DE (1) | DE4412715C1 (en) |
| IL (1) | IL113342A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3896181B2 (en) * | 1997-01-30 | 2007-03-22 | 相田化学工業株式会社 | Manufacturing method of precious metal products |
| DE19709280B4 (en) * | 1997-03-07 | 2004-03-04 | Heraeus Kulzer Gmbh & Co. Kg | Process for the production of decorated metallic jewelry articles and use of a photopolymerizable composition for the decoration of metallic jewelry articles m |
| CA2410813A1 (en) * | 2001-03-28 | 2002-11-27 | Phild Co., Ltd. | Health ornament containing titanium powder and method for manufacture thereof |
| SE527986C2 (en) * | 2003-09-17 | 2006-07-25 | Particular Ab C O Norlen | Metal powder blend for the production of precious metal products and products |
| FR2866820B1 (en) * | 2004-02-27 | 2006-12-01 | Renou Caroline Pandolfo | METHOD FOR JEWELERY AND ACCESSORIES |
| JP2006000147A (en) * | 2004-06-15 | 2006-01-05 | Fuairudo Kk | Health accessory using silicone elastomer and manufacturing method thereof |
| KR100750635B1 (en) | 2006-01-18 | 2007-08-20 | 최철웅 | Manufacturing method of artificial gemstones containing gold in soda-lime glass and crystal glass |
| DE602007001180D1 (en) | 2007-04-13 | 2009-07-09 | Lorenzo Brunetti | A method for producing an alloy for decorative articles and alloy for decorative articles, which can be produced in particular by this method |
| ITPD20070137A1 (en) * | 2007-04-13 | 2008-10-14 | Lorenzo Brunetti | PROCEDURE FOR THE REALIZATION OF A LEAGUE FOR ORNAMENTAL ITEMS AND ALLOY FOR ORNAMENTAL ITEMS OBTAINABLE IN PARTICULAR THROUGH THIS PROCEDURE |
| US20110064937A1 (en) * | 2008-05-28 | 2011-03-17 | Aida Chemcial Industries Co. Ltd | Composition for precious metal sintering, process for producing precious metal sinter and precious metal sinter |
| ITBO20090119A1 (en) * | 2009-03-02 | 2010-09-03 | Giuseppe Gardini | ACCESSORY, OF THE TYPE OF A JEWEL. |
| CH704429B1 (en) | 2011-01-26 | 2016-03-31 | Ecometal Sa | Composite material for the production of ornamental articles and procedure for the production of an ornamental article. |
| DE102011015223B4 (en) | 2011-03-25 | 2024-10-31 | Kulzer Gmbh | Dual-curing composition, process for its preparation and use for the production of coatings |
| DE102011015224A1 (en) | 2011-03-25 | 2012-09-27 | Heraeus Kulzer Gmbh | Dual-curable composition, process for its preparation and its use in the manufacture of embedments, in particular in metallography |
| WO2015155594A1 (en) | 2014-04-10 | 2015-10-15 | Artitec S.R.L. | Process for producing a composite material for decorative articles and composite material obtained by means of such process |
| EP3674816B1 (en) * | 2018-12-24 | 2022-04-27 | The Swatch Group Research and Development Ltd | External part of a timepiece or jewelry made of a heavy composite material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1355167A (en) * | 1962-04-13 | 1964-03-13 | Polymer Processes | Process for manufacturing a self-lubricating article, in particular a self-lubricating sintered metal support, and products conforming to those obtained by the present process or similar process |
| US3678145A (en) * | 1969-12-23 | 1972-07-18 | Us Air Force | A method for preparing metal matrix composites containing modified polytetrafluoroethylene |
| FR2390260A1 (en) * | 1977-05-13 | 1978-12-08 | Johnson Matthey Co Ltd | METHOD FOR MANUFACTURING METAL ARTICLES, ESPECIALLY FOR JEWELERY |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3932311A (en) * | 1974-07-29 | 1976-01-13 | Eastman Kodak Company | Electrically conducting adhesive composition |
| US4150995A (en) * | 1977-11-23 | 1979-04-24 | Okuno Chemical Industry Co., Ltd. | Vitreous enamel composition containing palladium powder |
| US4401767A (en) * | 1981-08-03 | 1983-08-30 | Johnson Matthey Inc. | Silver-filled glass |
| DE3135034C2 (en) * | 1981-09-04 | 1984-02-23 | Degussa Ag, 6000 Frankfurt | Material for jewelry and articles of daily use and process for its manufacture |
| US5183784A (en) * | 1990-02-21 | 1993-02-02 | Johnson Matthey Inc. | Silver-glass pastes |
-
1994
- 1994-04-13 DE DE4412715A patent/DE4412715C1/en not_active Expired - Fee Related
-
1995
- 1995-03-21 EP EP95104115A patent/EP0677590A1/en not_active Withdrawn
- 1995-04-10 US US08/421,157 patent/US5578383A/en not_active Expired - Fee Related
- 1995-04-11 JP JP7085810A patent/JPH07278603A/en active Pending
- 1995-04-12 BR BR9501548A patent/BR9501548A/en not_active Application Discontinuation
- 1995-04-12 IL IL11334295A patent/IL113342A/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1355167A (en) * | 1962-04-13 | 1964-03-13 | Polymer Processes | Process for manufacturing a self-lubricating article, in particular a self-lubricating sintered metal support, and products conforming to those obtained by the present process or similar process |
| US3678145A (en) * | 1969-12-23 | 1972-07-18 | Us Air Force | A method for preparing metal matrix composites containing modified polytetrafluoroethylene |
| FR2390260A1 (en) * | 1977-05-13 | 1978-12-08 | Johnson Matthey Co Ltd | METHOD FOR MANUFACTURING METAL ARTICLES, ESPECIALLY FOR JEWELERY |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9501548A (en) | 1995-11-14 |
| DE4412715C1 (en) | 1995-08-17 |
| IL113342A0 (en) | 1995-07-31 |
| JPH07278603A (en) | 1995-10-24 |
| US5578383A (en) | 1996-11-26 |
| IL113342A (en) | 1999-04-11 |
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