Ciba Specialty Chemicals Corporation

Manfred K&ouml;hler

Jean-Pierre Wolf

David G Leppard

Andreas Valet

Nils Hoeck

Andr&eacute; Litzler

Guido Tolotti

Peter Nesvadba

Raymond R Seltzer

Clemens Auschra

Glen T Cunkle

Martin Kunz

Martin Holer

Michael Bauer

Ernst Eckstein

Beat Michael Aebli

Ljubomir Misev

Aqueous storage-stable, non-sedimenting photoinitiator suspensions comprising (a) a mono- or bis-acylphosphine oxide of formula (I), wherein R is C -C alkyl; C -C alkyl interrupted by one or more O atoms; C -C alkoxy; phenyl-C -C alkyl; or phenyl that is unsubstituted or substituted by C C alkyl, C -C alkoxy, halogen, cyclopentyl, cyclohexyl, C -C alkenyl, C -C alkyl interrupted by one or more O atoms, and/or by phenyl-C -C alkyl; or R is biphenylyl; R is an aromatic radical or has one of the meanings give for R ; R and R are each independently of the other C -C alkyl, C -C alkoxy or halogen; and R is hydrogen, C -C alkyl, C -C alkoxy or halogen; (b) a dispersant; and (c) water are suitable especially in the photopolymerisation of aqueous formulations comprising ethylenically unsaturated monomers.

Photoinitiator formulations

The invention relates to a method of protecting wood against light-induced degradation by treatment with an impregnation which penetrates the surface of the wood comprising a) water without an organic solvent and b) a selected sterically hindered amine N-oxyl or N-hydroxyl. A further subject is the use of a sterically hindered amine N-oxyl or N-hydroxyl for the stabilization of wood.

Stabilization of wood substrates

Method for producing adhesive surface coatings

Mono-and Bis-acylphosphine oxide photoinitiator combinations

Photoinitiator mixtures and compositions with alkylphenylbisacylphosphine oxides

Alkylphenylbisacylphosphine oxides and photoinitiator mixtures

Photoinitiator combinations

Growing community of inventors

Freiburg, Germany

Manfred Köhler

Growing community of inventors

Freiburg, Germany

Manfred K&ouml;hler

Manfred Köhler