Sandoz Gmbh

Sandoz Ltd., (sandoz Ag)

Kurt Hofer

Lajos Avar

Guenther Tscheulin

Martin Preiswerk

Rudolf Moesch

Anton Voykowitsch

Aryl phosphonites and thiophosphonites of the formula, ##STR1## in which the or each R, independently, is alkyl, alkoxy, chlorine or dialkylamino, there being at the most one dialkylamino group, at the 4-position and unaccompanied by any other substituents, on the benzene nucleus,

Aryl phosphonites and thiophosphonites useful as antioxidants

Fluorene phosphonites and thiophosphonites of the formula, ##STR1## in which each R, independently, is alkyl or optionally substituted phenyl, each Y, independently, is oxygen or sulphur, and n is zero or 1, are useful as antioxidants. Organic materials, which are susceptible to the degradative effects of oxygen, are treated with one or more of such compounds e.g. by incorporation into the body of the organic material, in order to be stabilized against such effects.

Fluorene phosphonites and thiophosphonites as antioxidants for organic

Novel compounds based on a hydroxybiphenyl nucleus in which the hydroxy group is in the para position relative to the other phenyl ring and has an adjacent tertiary alkyl radical, are useful stabilizers for organic compounds against heat, light or oxygen.

N-(Para-hydroxybiphenyl)amides

The present invention concerns novel photopolymerizable formulations which comprise a photopolymerizable system in association with a photosensitizing amount of the compound of formula ##STR1## WHEREIN R is an unsubstituted or substituted binuclear aromatic group, e.g. phenoxy phenyl,

Photo-polymerizable systems containing 2-haloacetophenone derivatives as

The present invention concerns certain novel compounds falling under the general formula: ##STR1## WHEREIN R.sub.1, R.sub.2 and R.sub.3 are substituents, e.g. alkyl and Me is hydrogen or a metal cation. The compounds are useful stabilizers of organic material against the degradative effect of heat, oxidation and U.V. light.

Pyrazole compounds as stabilizers for organic materials

Organic materials are stabilized against the effects of heat, light or oxygen by addition of a compound of the formula ##STR1## WHEREIN X is --CH.sub.2 --, --O-- or -- S--,

Phosphonous and thiophosphonous acid ethers as stabilizers for organic

New ultraviolet light-absorbing compounds of the formula ##STR1## IN WHICH R.sub.1 is a substituent, e.g. alkyl,

Pyrazole derivatives

The purpose of the invention are new benzene phosphonous acid compounds in which two to four benzene nuclei are bound together and which contain one to three phosphorus atoms. The new compounds are free acids, their salts with inorganic cations, their esters, thioesters or amides. The invention concerns also the manufacture of these benzene phosphonous acid compounds and their use for the stabilization of organic materials.

Benzene phosphonous acid compounds, their production and use as

The present invention concerns novel nitrogen-containing aromatic heterocyclic compounds of the formula: ##STR1## wherein R is a group of the formula ##STR2## wherein R.sub.1 and R.sub.2 are substituents, e.g. alkyl and R.sub.3 is hydrogen or a substituent, e.g. alkyl; R.sub.4 is a group R.sub.14 --X--, wherein R.sub.14 is a substituent, e.g. alkyl and X is --O--, --S-- or ##STR3## wherein R.sub.6 is hydrogen or a substituent, e.g. alkyl, or R.sub.4 is a heterocyclic ring or has one of the significances of R; R.sub.5 has one of the significances of R.sub.4 ; and Y is --N.dbd. or --CH.dbd..

Nitrogen-containing aromatic heterocyclic compounds as anti-oxidants

New antistatic compounds of formula ##STR1## WHEREIN R.sub.1 is alkyl optionally interrupted by 1 or 2 S, SO or SO.sub.2 moieties or 1 COO moiety, any alkyl(ene) being optionally hydroxyl-substituted; cycloalkyl; alkylcycloalkyl; or a mono- or polyoxyalkylene group terminated by alkyl, optionally alkyl-substituted phenyl or phenylalkyl:,

Polyoxy sulfoxides and sulfones as antistatic agents

The present invention concerns novel nickel complexes (I) possessing U.V. stabilizing properties characterized by bearing per molecule 2 monodentate nickel coordinated 1,3-hydrocarbyl-4-(greater than C.sub.1)-acyl-pyrazole-5-oxy ligands and one bidentate or two monodentate nickel coordinated primary or secondary amine ligands, and their use as U.V. stabilizers for e.g. plastics materials.

Method of stabilizing organic materials employing pyrazole nickel

Triazine derivatives of formula ##STR1## in which R.sub.1 is a tertiary alkyl radical,

Triazine derivatives as stabilizers for organic materials

The present invention concerns novel 2-hydroxybenzophenone derivatives and metal complexes thereof of the formula: ##STR1## wherein Z.sub.1, Z.sub.2, Y.sub.1 and Y.sub.2 are each, independently, hydrogen or a substituent, at least one of Y.sub.1 and Y.sub.2 being a group ##STR2## wherein, R.sub.1 is alkyl R.sub.2 is hydrogen or a substituent and A is oxygen, sulphur or ##STR3## The compounds are useful for stabilizing organic material, e.g. plastics, against degradation under the influence of U.V. radiation.

2-Hydroxybenzophenone derivatives

The present invention concerns a novel method of stabilizing organic material susceptible to degradation under the effect of heat, oxidation or ultra-violet light which comprises treating said material with a compound of the formula: ##STR1## WHEREIN R.sub.1, R.sub.2 and R.sub.3 are substituents, e.g. alkyl and Me is hydrogen or a metal cation.

Method of stabilizing organic materials employing pyrazole compounds and

New ultraviolet light-absorbing compounds of the formula ##SPC1## In which

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Munchenstein, Switzerland

Kurt Hofer