Ciba-geigy Corporation

Basf Se Corporation

Ciba Specialty Chemicals Corporation

Huntsman Advanced Materials Americas LLC

Chiron Diagnostics Corporation

Vantico Limited

Ciba-geigy Ag

Ciba Corning Diagnostics Corp.

Ciba Corporation

Basf Italia S.r.l.

Walter Fischer

Jurgen Finter

Carl W Mayer

Vratislav Kvita

Marcus Baumann

Hans Zweifel

Wolfgang Wernet

Heinz Spahni

Abdel-Ilah Basbas

Evelyn Fischer

Rolf Wiesendanger

Martin Roth

Say-Jong Law

Ernst Minder

Qingping Jiang

Manfred Hofmann

Kai-Uwe Schöning

Manuele Vitali

Katharina Fritzsche

Alex Wegmann

John T Unger

Elizabeth K Krodel

Heinz Wolleb

Friedrich Lohse

Beat Schmidhalter

Kurt Meier

Bruno Hilti

Dario Lazzari

Visvanathan Ramanathan

Martin Brunner

Rudolf Duthaler

Bruno Rotzinger

Albert Schneider

Bernd Tieke

Oliver Reich

Kai-Uwe Schoening

Mirko Rossi

Isabelle Frischinger

Cinzia Tartarini

Claudio A Gabutti

Alexander Mantler

Stefan Hauck

Rolf Benz

Manfred Rembold

Adalbert Braig

Barbara Wagner

Jin Mizuguchi

Dirk Simon

Graziano Zagnoni

Reinhold Öhrlein

Louis Felder

Mara Destro

Werner Hölzl

Jurgen Vogt

Reinhard Sommerlade

Markus Frey

Tibor Somlo

Barbara Winkler

Johannes Benkhoff

Karin Powell

Davide Alvisi

James Robbins

Thomas Allmendinger

Jun Xi

Robert Cordova

Alexander Dichtl

Tiziano Nocentini

Bryan Dobinson

Hanspeter Stricker

Joseph A Kotrola

Michael Peter Difazio

Christine Helbling

Evelyn Fischer-Reimann

Reinhard H Sommerlade

A composition, which comprises a) an organic material susceptible to oxidative, thermal or light-induced degradation; and b) a compound of formula I (Formula I) (I) where R, R, R, R, R, R, R, R, Rand Rare independently from each other H, C-C-alkyl, C-C-cycloalkyl, phenyl, C-C-alkoxy or halogen; n is 1, 2, 3, or 4; and when n is 1 A is &#x2014;C(=0)-OR', &#x2014;C(=0)-N(R)(R&#x2032;), &#x2014;CN, phenyl, which is unsubstituted or substituted by one or more C-C-alkyl, C-C-alkoxy, C-C-cycloalkyl or halogen, &#x2014;H or &#x2014;S0-phenyl; when n is 2 A is &#x2014;C(=0)-0-Z&#x2014;O&#x2014;C(=0)-, &#x2014;C(=0)-N(R&#x2033;)&#x2014;Z&#x2014;N(R&#x2033;)&#x2014;C(=0)- or piperazine-N,N&#x2032;-biscarbonyl. 

5H-furan-2-one derivatives stabilization of organic material

Disclosed is the use of benzotropolone derivatives of formula whereinR, Rand Rindependently from each other are hydrogen; C-Calkyl; or COR;Ris hydrogen; or COORRis hydrogen; or C-Calkyl;Ris hydrogen; hydroxy; C-C-alkoxy; or &#x2014;O&#x2014;(CO)&#x2014;R;Ris hydrogen; C-Calkyl; or COR; orRand Rtogether may form a five or six membered ring; orRand Rtogether form a five or six membered ring; andR, R, Rindependently of each other are C-Calkyl;for protecting body-care and household products from photolytic and oxidative degradation.

Stabilization of household, body-care and food products by using benzotropolone containing plant extracts and/or related benzotropolone derivatives

A composition, which comprises a) an organic material susceptible to oxidative, thermal or light-induced degradation; and b) a compound of formula I (Formula I) (I) wherein R, R, R, R, R, R, R, R, Rand Rare independently from each other H, C-C-alkyl, C-C-cycloalkyl, phenyl, C-C-alkoxy or halogen; n is 1, 2, 3, or 4; and when n is 1 A is &#x2014;C(=0)-OR', &#x2014;C(=0)-N(R&#x2032;)(R&#x2032;), &#x2014;CN, phenyl, which is unsubstituted or substituted by one or more C-C-alkyl, C-C-alkoxy, C-C-cycloalkyl or halogen, &#x2014;H or &#x2014;S0-phenyl; when n is 2 A is &#x2014;C(=0)-O&#x2014;Z&#x2014;O&#x2014;C(=0)-, &#x2014;C(=0)-N(R&#x2033;)&#x2014;Z&#x2014;N(R&#x2033;)&#x2014;C(=0)- or piperazine-N,N&#x2032;-biscarbonyl. 

5H-furan-2-one derivatives for stabilization of organic material

The present invention pertains to a reversibly thermochromic system comprising a substituted or an unsubstituted 6,11-dihydroxy-naphthacene-5,12-dione and a base and to a reversibly thermochromic composition comprising the reversibly thermochromic system and a carrier material and to novel substituted 6,11-dihydroxy-naphthacene-5,12-diones.

Reversibly thermochromic compositions

The instant invention pertains to novel bi- or tricyclic sterically hindered alkoxyamines, their precursors, a process for their preparation and their use as light stabilizers for polymers or coatings, as flame retardants, as peroxide substitutes (rheology modifiers) or carbon radical scavengers.

Bi- or tricyclic sterically hindered alkoxyamines and process for their preparation

Disclosed is the use of benzotropolone derivatives of formula (1), wherein R, Rand Rindependently from each other are hydrogen; C-Calkyl; or COR; Ris hydrogen; or COORRis hydrogen; or C-Calkyl; Ris hydrogen; hydroxy; C-C-alkoxy; or -0-(CO)&#x2014;R; Ris hydrogen; C-Calkyl; or COR; or Rand Rtogether may form a five or six membered ring; or Rand Rtogether form a five or six membered ring; and R, R, Rindependently of each other are C-Calkyl; for protecting body-care and household products from photolytic and oxidative degradation. 

The instant invention pertains to novel bi- or tricyclic sterically hindered alkoxyamines, their precursors, a process for their preparation and their use as light stabilizers for polymers or coatings, as flame retardants, as peroxide substitutes (rheology modifiers) or carbon radical scavengers. 

Bi&#x2014;or tricyclic sterically hindered alkoxyamines and process for their preparation

The present invention relates to a novel process for the preparation of specific sterically hindered nitroxyl ethers from their corresponding sterically hindered nitroxyl radicals by reacting it with an aldehyde and a hydroperoxide. This nitroxyl ether formation may be carried out from different starting nitroxyl radicals, which are subsequently further reacted to the desired compounds. The compounds prepared by this process are effective as stabilizers for polymers against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.

Process for the preparation of sterically hindered nitroxyl ethers

The present invention relates to a novel process for the preparation of a sterically hindered nitroxyl ether from the corresponding sterically hindered nitroxyl radical by reacting it with a carbonyl compound and a hydroperoxide. The compounds prepared by this process are effective stabilizers for polymers against harmful effects of light, oxygen and/or heat, as flame-retardants for polymers and as polymerization regulators.

A reversible thermochromic system comprising a) a compound of the formula (IA) or a tautomer thereof or a compound of the formula (IB) or a tautomer thereof (IA) (IB) wherein Ris C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; phenyl, phenyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; Ris hydrogen or a group &#x2014;SO&#x2014;R; Rand Rindependently of one another are hydrogen, C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; phenyl, phenyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; and R is C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; phenyl, phenyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; and b) a compound containing a group of the formula (III). 

The present invention pertains to a reversible thermochromic system comprising a &#x3b2;-phenylvinylketone or a &#x3c9;-phenyl polyacetylenyl ketone with at least one acidic hydrogen and a base and to a reversible thermochromic composition comprising the reversible thermochromic system and a carrier material and to novel substituted &#x3b2;-phenylvinylketones or &#x3c9;-phenyl polyacetylenyl ketones with at least one acidic hydrogen.

Reversible thermochromic compositions

A reversible thermochromic system comprising a) a compound of the formula (I) or a tautomer thereof (I) wherein Ris C-Calkyl, C-Calkenyl, C-Ccycloalkyl, C-Ccycloalkyl substituted by 1, 2 or 3 C-Calkyl; or C-Cphenylalkyl; Rand Rare hydrogen or Rand Rtogether form a group &#x2014;CH&#x2550;CH&#x2014;CH&#x2550;CH&#x2014;; and Ris hydrogen, &#x2014;NO, &#x2014;SO&#x2014;Ror (4-nitrophenyl)azo; and b) a compound containing a group of the formula (II). 

The instant invention relates to new photolatent compounds of the formula I wherein Rand Rare each independently of the other C-Calkyl or C-Ccycloalkyl, Ris hydrogen or C-Calkyl, and wherein the photochemically cleaved group ROH is selected from the group consisting of fragrances, UV absorbers, anti-microbials, anti-fogging agents and clarifiers; with the proviso that, when Rand Rare tert-butyl and Ris hydrogen, Ris not methyl or phenyl. 

Photolatent systems

The invention relates to novel benzotriazole UV-absorbers having a long wavelength shifted absorption spectrum with significant absorbance up to 410-420 nm. Further aspects of the invention are a process for their preparation, a UV stabilized composition containing the new UV-absorbers and the use of the new compounds as UV-light stabilizers for organic materials. 

Long wavelength shifted benzotriazole UV-absorbers and their use

A process for the preparation of bis-acylphosphanes of formula RP(COR)wherein Ris unsubstituted phenyl or phenyl substituted by one to five halogen, C-C-alkyl, C-C-alkylthio and/or C-C-alkoxy; Ris C-C-alkyl or C-C-alkenyl; C-C-alkyl or C-C-alkenyl substituted once or more than once by halogen &#x2014;OR, &#x2014;OCO&#x2014;R, &#x2014;OCO-Hal, &#x2014;COO&#x2014;R, &#x2014;N(R)&#x2014;CO&#x2014;R, &#x2014;N(R)&#x2014;CO-Hal, &#x2014;CO&#x2014;NRR, &#x2014;CH&#x2550;CH&#x2014;CO&#x2014;ORor &#x2014;CH&#x2550;CH-phenyl; &#x2014;C(C-Calkyl)=C(C-Calkyl)-CO&#x2014;ORor &#x2014;C(C-Calkyl)=C(C-Calkyl)-phenyl; C-Ccycloalkyl, C-Calkenyl, phenyl-C-Calkenyl, phenyl, naphthyl, biphenyl or a 5- or 6-membered &#x2014;O&#x2014;, S&#x2014; or N-containing heterocyclic ring, the radicals phenyl, naphthyl, biphenyl or the 5- or 6-membered -0-, S&#x2014; or N-containing heterocyclic ring being unsubstituted or substituted by one to five halogen, C-Calkyl, C-Calkoxy and/or C-Calkylthio; the process comprises the steps in a) selective reduction of dichlorophenylphosphanes of the formula RP(CI)by means of hydrogen at a temperature in the range from 20 to 200&#xb0; C. and under hydrogen pressure of atmospheric pressure to 20 bar in the presence of a hydrogenation catalyst, a tert. aliphatic amine or an aromatic amine and in the presence of a non protic solvent which is unreactive under the hydrogenation conditions to obtain cyclic phenylphosphanes (RP)(n=4 to 6); or b) selective reduction of RP(CI)by means of hydrogen at a temperature in the range from 80 to 250&#xb0; C. and under hydrogen pressure of 25 to 250 bar in the presence of a hydrogenation catalyst, a tert. aliphatic amine or an aromatic amine and in the presence of a non protic solvent which is unreactive under the hydrogenation conditions to obtain RPH; c) subsequent reaction with an acid halide of formula in the presence of an apropriate base RCOHal wherein Ris as defined above.

Process for preparing acylphosphanes and their oxides and sulphides

Growing community of inventors

Reinach, Switzerland

Walter Fischer