Ciba-geigy Corporation

Ciba-geigy Ag

Ciba Specialty Chemicals Corporation

David G Leppard

Jean Rody

Manfred Kohler

Vien V Toan

Roland A Winter

Ramanathan Ravichandran

Mario Slongo

Adalbert Braig

Hugh Stephen Laver

Gebhard Hug

Pascal Hayoz

Andreas Valet

Joseph E Babiarz

Emyr Phillips

Hans-Rudolf Meier

Volker H Von Ahn

Mark S Holt

Paul Tschopp

Robert C Wasson

Ljubomir Misev

Eric Vieira

Kurt Burdeska

Mario Fryberg

Gerhard Rytz

Reto Luisoli

Werner Stegmann

Michela Bonora

Eugen Eichenberger

Urs Schwendimann

Norbert Wurms

Robert E Detlefsen

François Gugumus

Dario Lazzari

David H Steinberg

Graziano Zagnoni

Manuele Vitali

Thomas Stauner

Massimiliano Sala

Gianluca Ferri

Graham Evans

Manfred K&ouml;hler

Henri Dubas

René Kaeser

Peter Nesvadba

Michael Rasberger

Stephen Mark Andrews

Dirk Simon

Thomas Bolle

Christophe Bulliard

Suruliappa Gowper Jeganathan

Frédérique Wendeborn

Markus Grob

Roland A E Winter

Ronald Salathe

Robert E Detiefsen

René´ Kaeser

Thomas Lloyd James

Nils Hock

Stéphan Biry

The present invention relates to highly compatible hydroxyphenyltriazine UV-absorbers and to their use in protecting plants in green houses and the protection of foodstuffs, beverages, pharmaceuticals, cosmetics, personal care products, shampoos and the like from the deleterious effects of ultraviolet radiation. It has been found that certain highly compatible tris-aryl-s-triazines are especially effective towards this end when incorporated in the containers or films in which such materials are stored.

Highly compatible hydroxyphenyltriazine UV-absorbers

A stabilizer composition comprising (A) a compound of the formula (I) wherein R is (CH&#x2014;CH&#x2014;O&#x2014;), &#x2014;R; &#x2014;CH&#x2014;CH(OH)&#x2014;CH&#x2014;O&#x2014;R; or &#x2014;CH(R)&#x2014;CO&#x2014;O&#x2014;R; n is 0 or 1; Ris C-Calkyl or C2Calkenyl or C-Caryl or CO&#x2014;C-Calkyl; Ris H or C-Calkyl; Ris C-Calkyl or C-Calkenyl or CCcycloalkyl; and (B) one or more compounds selected from benzotriazoles of the formula (IIa), 2-hydroxybenzophenones of the formula (IIb), oxalanilides of the formula (IIc), 2-hydroxyphenyltriazines of formula (IId), cinnamates of formula (IIe), and benzoates of formula (IIf) as defined in claimis especially effective towards stabilizing organic materials against degradation induced by light, heat or oxidation.

Synergistic UV absorber combination

The novel transparent polyolefin, polyester or polyamide article disclosed is stabilized against the effects of light, oxygen, heat and agressive chemicals by addition of 0.005-0.30% by weight the polymeric substrate of a hydroxyphenyl triazine UV absorber, and is characterized by its thickness between 1 and 500 &#x3bc;m. Preferred polyolefin articles thus stabilized are agricultural films containing as further stabilizer a sterically hindered amine. The novel compositions act as selective UV filter especially useful in agriculture.

Transparent polymer articles of low thickness

Compounds of the general formula I' in which R, Rand Rindependently of one another, are H or &#x2014;Y&#x2014;T as defined in claimwhere T is a reactive group selected from OH, acryl- and methacryloxy and arylcarbonate groups, and further symbols are as defined in claimare effective as crosslinking agents for polymeric networks, especially as in flexographic printing plates, coatings, and plastic containers or films. Further provided is a method of protecting the content of a clear or lightly colored plastic container or film against the deleterious effects of ultraviolet radiation, which method comprises permanently and covalently bonding one or more UV absorbing moieties of a durable s-triazine UV absorber via condensation to a suitable polymer component.

2-hydroxyphenyl-s-triazine crosslinkers for polymer networks

A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.

Process for the preparation of acylphosphines, acyl oxides and acyl sulfides

The novel transparent polyolefin, polyester or polyamide article disclosed is stabilized against the effects of light, oxygen, heat and agressive chemicals by addition of 0.005&#x2013;0.30% by weight the polymeric substrate of a hydroxyphenyl triazine UV absorber, and is characterized by its thickness between 1 and 500 &#x3bc;m. Preferred polyolefin articles thus stabilized are agricultural films containing as further stabilizer a sterically hindered amine. The novel compositions act as selective UV filter especially useful in agriculture.

A color photographic material is described containing a compound of formula (I) wherein, if n=1, Ris, inter alia, a radical of formula (II), and, if n=2, Ris unsubstituted or C&#x2013;Calkyl- or hydroxy-substituted phenylene or naphthylene; or &#x2014;R&#x2014;X&#x2014;R&#x2014;, and other residues are as defined in claim 1. The compound of formula (I) is effective as scavenger of the oxidized form of the developer (Dox scavenger), especially when contained in an interlayer between light sensitive layers. Selected compounds of this class can also be used as additives, for example as dye stabilizer, in color photographic materials, or as an antioxidant for organic materials. 

Color photographic material

Dimeric light stabilizers for polyolefines and polyolefine copolymers

Photoinitiator mixtures and compositions with alkylphenylbisacylphosphine oxides

Alkylphenylbisacylphosphine oxides and photoinitiator mixtures

Compounds of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are, for example, a group of the formula II ##STR2## R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 independently of one another are, for example, hydrogen, C.sub.1 -C.sub.12 alkyl, OR.sub.8, SR.sub.9, NR.sub.10 R.sub.11, halogen or phenyl; R.sub.8, R.sub.9, R.sub.10, R.sub.11 independently of one another are, for example, hydrogen or C.sub.1 -C.sub.12 alkyl; R.sub.12 is, for example, C.sub.1 -C.sub.8 alkyl; R.sub.13 is, for example, C.sub.1 -C.sub.12 alkyl; R.sub.14 is, for example, hydrogen; Y is C.sub.1 -C.sub.12 alkylene, C.sub.4 -C.sub.8 alkenylene, C.sub.4 -C.sub.8 alkynylene or cyclohexylene, or is phenylene or C.sub.4 -C.sub.40 alkylene interrupted one or more times by --O--, --S-- or --NR.sub.15 --, or Y is a group of the formula III, IV, V, VI, VII, VIII, IX, X or XI ##STR3## Y.sub.1 is as defined for Y with the exception of the formula V; R.sub.15 is hydrogen, C.sub.1 -C.sub.12 alkyl or phenyl; and R.sub.16 is hydrogen, CH.sub.2 OH or C.sub.1 -C.sub.4 alkyl; and mixtures of these compounds with further photoinitiators are suitable for photopolymerizing compounds having ethylenically unsaturated double bonds.

Non-volatile phenylglyoxalic esters

Compounds of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.4 alkyl, R.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy and R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 independently of one another are hydrogen, halogen, C.sub.1 -C.sub.20 alkyl, cyclopentyl, cyclohexyl, C.sub.2 -C.sub.12 alkenyl, C.sub.2 -C.sub.18 alkyl which is interrupted by one or more oxygen atoms, or are phenyl-substituted C.sub.1 -C.sub.4 alkyl, or are phenyl which is unsubstituted or is mono- or disubstituted by C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy with the provisos that at least one of the radicals R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 is other than hydrogen and that, if R.sub.1 and R.sub.2 are methyl, R.sub.3 and R.sub.6 are not methyl, and mixtures of such compounds with .alpha.-hydroxy ketones, benzophenones and .alpha.-amino ketones, are suitable as photoinitiators.

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Marly, Switzerland

David G Leppard