The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1996
Filed:
Feb. 22, 1995
Andreas Schulz, Neu-Isenburg, DE;
Marco Hofler, Freigericht, DE;
Cerdec Aktiengesellschaft Keramische Farben, Frankfurt, DE;
Abstract
The invention relates to aqueous precious metal preparations and their use for manufacturing precious metal decorations. Precious metal preparations are known for the manufacture of precious metal decorations on the basis of one or more precious metals from the series gold, silver, platinum and palladium, which have an organic or organic/aqueous solvent system. There is a need for preparations which are essentially free from organic solvents. Preparations according to the invention contain a precious metal thiolate which has at least one functional group capable of salt formation, in the form of a water soluble salt, a water-soluble polymer organic binder, a surfactant in effective quantity and, as solvents, water and less than 2% by weight of organic solvents. Preferred preparations contain a gold thiolate of the formula Au--S--Q--COOH, Q standing for a divalent organic group optionally containing functional groups, polyvinylpyrrolidone and/or hydroxyethylcellulose as binders and as surfactant an alkylbenzene sulphonate or a polyether-polysiloxane copolymer in a quantity of 0.1 to 2.0% by weight. High-gloss, speck-free decorations can be produced by using the preparations which are essentially free from organic solvents.