Ciba Specialty Chemicals Corporation

Andreas M&uuml;hlebach

Andreas Hafner

Paul Adriaan Van Der Schaaf

Roman Kolly

Peter Nesvadba

Andreas Kramer

Michael Roth

Alfred Steinmann

Werner Stauffer

Fran&ccedil;ois Rime

Polymeric stabilizers having low polydispersity

The invention relates to compositions of hexacoordinated ruthenium and osmium carbenes with a carbonyl group as ligand and a vinyl group as substituent on the carbene group as catalysts for the photoinduced ring-opening metathesis of strained cycloolefins. It also relates to novel hexacoordinated ruthenium and osmium carbenes having a carbonyl group as ligand and a vinyl group as substituent on the carbene group, to compositions of the catalyst with cycloolefins, and to the polymerization process.

Ruthenium and osmium carbene carbonyl catalysts

The invention relates to a process for the preparation of polymers containing N&rarr;O terminal groups and to compositions comprising polymers obtained by this process. The process comprises polymerizing by atom transfer radical polymerization (ATRP) an aliphatic monomer of oligomer containing ethylene groups in the presence of a polymerization initiator.

Process for the preparation of polymers containing N-O terminal groups

Heterocyclyl ligand containing ruthenium and osmium catalysts

The invention relates to penta- and hexacoordinated ruthenium and osmium carbene catalysts, in which a sulfur, oxygen or nitrogen atom is attached to the carbene group which is coordinated with the central ruthenium or osmium atom, to their preparation and to their use for synthesizing polymers, for ring-closing metathesis of olefins and for isomerizing olefins.

Ruthenium and osmium carbene catalysts

Composition comprising (a) catalytic amounts of a one-component catalyst for metathesis polymerization and (b) at least one polymer with strained cycloalkenylene radicals bonded to the polymer backbone via a divalent bridge group, alone or as a mixture with strained cycloolefins. The composition can be polymerized thermally or photochemically by metathesis polymerization and is suitable for the production of shaped articles, coatings and relief images. The polymers (b) are likewise claimed.

Polymerizable composition, process for producing cross-linked polymers and crosslinkable polymers

Disclosed is a compound of formula (I), and its use in preparing metathesis polymers of dicyclopentadiene and/or other strained cycloolefins

Ruthenium and osmium catalysts

Composition comprising (a) catalytic amounts of a one-component catalyst for metathesis polymerization and (b) at least one polymer with strained cycloalkenylene radicals bonded in the polymer backbone, alone or as a mixture with strained cycloolefins. The composition can be polymerized thermally or photochemically by metathesis polymerization and is suitable for the production of shaped articles, coatings and relief images. The catalyst is selected from Ruthenium and Osmium compounds.

Polymerizable composition, process for producing cross linked polymers, and cross-linkable polymers

Polymerizable composition and polymerization method

Composition of (a) dicyclopentadiene, by itself or in a mixture with a strained cycloolefin, and (b) a catalytic amount of at least one carbene-free, divalent-cationic ruthenium or osmium compound as a single-component catalyst, which contains at least one phosphine group and a total of 2 to 5 ligands bonded to the metal atom, and which contains acid anions for charge balancing. The compositions can be polymerized by means of heat (metathesis polymerization) and are suitable for the production of shaped articles and coatings.

Growing community of inventors

Frick, Switzerland

Andreas Mühlebach

Growing community of inventors

Frick, Switzerland

Andreas M&uuml;hlebach

Andreas Mühlebach