Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Bernd Klingert

Carl W Mayer

Manfred Rembold

Bruno Hilti

Ernst Minder

Adrian Schulthess

Rinaldo Husler

Max Hunziker

Eginhard Steiner

Robert W Lang

Manfred Hofmann

Rolf Wiesendanger

Paul Bernhard

Franciszek Sitek

Jean-Roch Pauquet

Roberto Todesco

Stabilized filled polyolefins

A process is described for the preparation of photopolymerizable compositions, wherein the photopolymerizable compositions can be photopolymerized by the irradiation of emission lines of differing wavelength from a UV/VIS laser light source, and contain a photopolymerizable compound and at least two photoinitiators, by adjusting the sensitivity to radiation. The ratio between the concentrations of the individual photoinitiators is so adjusted that the composition has virtually the same optical density for the radiation of the different emission lines at which the photoinitiators are effective.

Process for adjusting the sensitivity to radiation of photopolymerizable

Radical cation salts having the composition of formula I ##STR1## wherein x has a value from -0.1 to +0.2. These radical cation salts crystallize in needle form and are electric conductors. They can be incorporated in polymers to form conductive networks of crystal needles in a polymer matrix. The polymers can be used for making antistatically treated mouldings or electrodes.

Radical cation salts of tetrathiotetracene and copper chloride, their

Radical cation slats of tetrathiotetracene and copper chloride, their

Titanocenes containing two 5-membered cyclodienyl groups, for example cyclopentadienyl, and one or two 6-membered carbocyclic or 5- or 6-membered heterocyclic aromatic rings which are substituted by a fluorine atom in at least one of the two ortho-positions to the titanium-carbon bond and contain, as a further substituent, unsubstituted or substituted 1-pyrryl, are suitable as photoinitiators for radiation-induced polymerization of ethylenically unsaturated compounds.

Titanocenes, the use thereof, and N-substituted pyrroles

Titanocenes with silylated .pi.-cyclopentadienyl ligands in which one or two carbo- or heterocyclic aromatic rings are bonded to the titanium, the aromatic rings being substituted by fluorine, --CF.sub.3, --C.sub.2 F.sub.5, --CF.sub.2 CL or --CF.sub.2 CH.sub.3 in at least one of the two ortho-positions relative to the metal-carbon bonds, are suitable as photoinitiators for the photopolymerization of ethylenically unsaturated substrates. They are distinguished by a high sensitivity, stability to air and the action of heat, and a high activity in the region of UV light to visible light. They are furthermore readily soluble in the photopolymerizable compositions.

Titanocenes and their use

Process for the preparation of trifluorodichloroethyl-substituted acids

Growing community of inventors

Inzlingen, Germany

Bernd Klingert