Ciba Specialty Chemicals Corporation

Basf Se Corporation

Beat Michael Aebli

Jean-Pierre Wolf

Samuel Evans

Gebhard Hug

David Eliezer Chasan

Martin Holer

Marc Ribeaud

Manfred K&ouml;hler

Ernst Eckstein

Sandor Gati

The invention relates to a composition comprising a mixture of alkylated N-&#x3b1;-naphthyl-Nphenylamine (PANA) and alkylated diphenylamine (DPA), the product obtainable by alkylating PANA or a mixture of PANA and DPA with alkenes and the process for alkylating PANA or a mixture of PANA and DPA with alkenes. The compositions according to the present invention have an outstanding anti-oxidative action, which can be demonstrated by established test methods.

Alkylated PANA and DPA compositions

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

Organometallic monoacylarylphosphines

The invention relates to a mixture of nonylated diphenylamines, especially dinonylated diphenylamines, and to a technically advantageous methodological process for the preparation of that mixture by using acid catalysts in small quantities. The mixture is used as an additive for stabilizing organic products that are subjected to oxidative, thermal and/or light-induced degradation.

Nonylated diphenylamines

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Basel, Switzerland

Beat Michael Aebli