Ciba-geigy Corporation

Other

Ciba Specialty Chemicals Corporation

Metco S.r.l.

Vignali, Graziano

Graziano Vignali

Valerio Borzatta

Fabrizio Guizzardi

Ramanathan Ravichandran

Joseph Suhadolnik

Roberto Scrima

Giuseppe Cantatore

Graziano Zagnoni

Michele Giorgi

Paul Dubs

Peter Baumeister

Elisa Canto

Iuri Bernardi

Giovanni De Roit

Described is a production process for the preparation of an organic titanium derivative useful for the preparation of yellow inks for digital printing on ceramics, comprising the following steps:  Also described are the titanium derivative obtainable by means of the above-reported process, an ink that contains the derivative and a method of digital printing on ceramics that uses said ink.

Organic titanium derivative and process for the preparation thereof, ink containing the derivative and ceramic digital printing method that uses the ink

The present invention relates to an ink set containing chromophoric metals for digital printing on ceramic materials additive-treated with silica and titanium dioxide, a process for decorating ceramic materials by digital printing using said ink set and decorated ceramic articles obtainable by said process.

Inks for digital printing on ceramic materials, a process for digital printing on ceramic materials using said inks, and ceramic material obtained by means of said printing process

The invention relates to a new process for coloring ceramic materials by using aqueous solutions of chromophore ions. In particular, certain types of silica are added to the ceramic mixes which are to be colored, after which aqueous or organic solutions comprising inorganic salts of Fe (II) and/or Fe (III), or organic derivatives of Fe (II) and/or Fe (III) are applied to the surface of the said additive-containing ceramic mixes.

Process for colouring ceramic materials

Composition whereby ceramic manufactured articles are colored in shades from pink to violet, such composition includes of a monovalent gold thiolate water solution or mixture of water with a water soluble organic solvent according to the following formulas Au&mdash;S&mdash;R&mdash;X and Au&mdash;S&mdash;R&mdash;H, where R stands for a linear or branched bivalent radical of aliphatic or aromatic or cycloaliphatic or heterocyclic type optionally with substituents, such as for example aminic, amidic, hydroxylic, carboxylic, hydrocarbylic or carbonylic groups or CONH&mdash;, in the chain; X stands for a monovalent group selected out of &mdash;COOH, SO OH, &mdash;OH, &mdash;CONH , &mdash;NH ; O&mdash;P(O)(OH) , in which H atoms may be replaced by alkyl groups and wherein acid group may be salified with amines or alkaline or alkaline earth metals and basic groups may optionally be salified with organic acids

Formulations based on water soluble gold compounds suitable for coloring ceramic manufactured articles

Composition whereby ceramic manufactured articles, obtained by molding pressing a ceramic mixture added with 1% to 10% TiO,by wt., are colored in shades from yellow ocher to sienna, said composition being an aqueous or hydroalcoholic solution including tungsten and chromium inorganic compounds or organic derivatives, which is applied by controlled absorption to the surface of the ceramic material before firing.

Composition based on tungsten and chromium aqueous solutions suitable for coloring ceramic manufactured articles and relevant high temperature coloring process

Composition whereby ceramic manufactured articles, obtained by moulding a conventional ceramic mixture without added TiO,., are colored from yellow to orange, said composition consisting of an aqueous solution of inorganic compounds or organic complexes of titanium and chromium combined with antimony or tungsten or mixtures thereof, in quantities corresponding to 2 to 6% by wt. Ti, 3 to 12% Sb (or 4 to 14% tungsten) and 0.2 to 2.5% chromium.

Formulations based on water soluble compounds of titanium and chromium combined with antimony or tungsten or mixtures thereof suitable for coloring ceramic manufactured articles and relevant high temperature coloring process

Ceramic high-temperature coloring process

Composition whereby ceramic manufactured articles, obtained by molding pressing a ceramic mixture added with 1% to 10% TiO.sub.2 by wt., are colored in shades from yellow ocher to sienna, said composition being an aqueous or hydroalcoholic solution including tungsten and chromium inorganic compounds or organic derivatives, which is applied by controlled absorption to the surface of the ceramic material before firing.

Composition based on tungsten and chromium aqueous solutions suitable

Novel piperidine-triazine compounds of the formula (Ia) and (Ib) suitable for use as light stabilisers, heat stabilisers and oxidation stabilisers for organic materials. The meanings of R.sub.1, R.sub.2, R.sub.3, G.sub.1, G.sub.2, L.sub.1, L.sub.2, m and n are defined in the text. ##STR1##

Piperidine-triazine compounds suitable for use as stabilisers for

Compounds possessing both a hindered amine moiety, such as a derivative of 2,2,6,6-tetramethylpiperidine, and a hydroxylamine moiety where the N-hydroxy group is not attached to a nitrogen atom in a piperidine ring are valuable stabilizers for protecting polymer compositions against the deleterious effects of actinic light and from the adverse effects of high temperature polymer processing environments.

Polymer stabilizers containing both hindered amine and hydroxylamine

Novel process for the preparation of 2,2,6,6-tetramethyl-4-piperidyloxy-1,3,5-triazines, based on the reaction of cyanuric chloride with C.sub.1 -C.sub.4 alkanols or with sodium or potassium C.sub.1 -C.sub.4 alkoxides and subsequent reaction with 2,2,6,6-tetramethyl-4-piperidinols in the presence of a transesterification catalyst. The various reactions can be carried out in the same reactor, without isolation of the intermediates. ##STR1##

Process for the preparation of

Novel piperidine-triazine compounds of the formula (Ia) and (Ib) suitable for use as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials. The meanings of R.sub.1, R.sub.2, R.sub.3, G.sub.1, G.sub.2, L.sub.1, L.sub.2, m and n are defined in the text. ##STR1##

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Sasso Marconi, Italy

Graziano Vignali