Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Franciszek Sitek

Manfred Rembold

Werner Rutsch

Rinaldo Husler

Rudolf Pfaendner

Heinz Herbst

Kurt Hoffmann

Kurt Dietliker

Godwin Berner

Vincent Desobry

Eginhard Steiner

Martin Riediker

Harry Beyeler

Jean Rody

Mario Slongo

Andreas Valet

Hans-Jurgen Sander

Rinaldo H Usler

Bernd Klingert

Jean-Roch Pauquet

Roberto Todesco

Hans-J&uuml;rgen Sander

Franca Masina

Recycled mixtures of plastics, predominantly thermoplastics, as predominantly produced in the household, in commerce and also in industry and useful material collections, can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and an inorganic compound from the series consisting of metal oxides, hydroxides and carbonates.

Process for the stabilization of a stabilizer mixtures for recycled plastic mixtures

Single-material recycled thermoplastics from commercial and industrial waste can be stabilized against thermal oxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and an inorganic compound from the series consisting of metal oxides, hydroxides and carbonates.

Process for the stabilization of and stabilizer mixtures for single-material recycled plastics

Recycled plastics, predominandy thermoplastics, from domestic, commercial and industrial waste can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and a metal salt of a fatty acid.

Process for the stabilization of and stablizer mixtures for recycled

Stabilized recycled plastics

Process for the stabilization of and stabilizer mixtures for recycled

Compounds of the formula I, II, III and IIIa ##STR1## in which Ar.sup.1 is an unsubstituted or substituted aromatic radical and at least one of the radicals R.sup.1 and R.sup.2 is an alkenyl, cycloalkenyl or arylmethyl group, are effective photoinitiators for photopolymerization of unsaturated compounds. They are particularly suitable for photocuring of pigmented systems.

A-aminoacetophenones as photoinitiators

.alpha.-aminoacetophenones as photoinitiators

Liquid highly active photoinitiators are obtained by dissolving a solid photoinitiator of the titanocene type in liquid photoinitiators of the acetal or ketal type. The liquid mixtures have a long dark storage stability.

Liquid photoinitiator mixtures

Recycled mixed plastics from domestic and commercial waste can be stabilized against thermal oxidative degradation by adding a combination of a sterically hindered phenol with a phosphite or phosphonite.

Process for stabilizing recycled mixed plastics

Compounds of the formula ##STR1## in which a is 1, 2, or 3, R.sup.1 is an uncharged, carbocyclic or heterocyclic aromatic ring, unsubstituted or substituted, R.sup.2 is an unsubstituted or substituted cyclopentadienyl or indenyl anion, and .vertline.X.vertline..sup.a- is an a-valent anion, are suitable for use as latent curing catalysts for two-component polyurethane coatings which are activated by irradiation with actinic light or by heating.

Process for curing polyurethane coatings and compositions

Novel alpha-aminoacetophenones as photoinitiators

Titanocenes containing two 5-membered cyclodienyl gropus, 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 further substituents, a substituted amino radical, are suitable as photoinitiators for radiation-induced polymerization of ethylenically unsaturated compounds.

Titanocenes, the use thereof, and n-substituted fluoroanilines

Titanocenes with, for example, .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 in at least one of the two ortho-positions relative to the matal-carbon bond and being substituted by at least one free or etherified or esterified polyoxaalkylene radical, are suitable as photoinitiators for the photopolymerization of ethylenically unsaturated substrates.

Titanocenes and their use

Growing community of inventors

Therwil, Switzerland

Franciszek Sitek