Sandoz Gmbh

Guenther Tscheulin

Kurt Hofer

Rudolf Moesch

Anton Voykowitsch

A filled polyolefin, particularly polypropylene, containing a sterically hindered phenol antioxidant and a compound of formula I and/or II ##STR1## in which R is unsubstituted phenyl or phenyl substituted by 1 or 2 C.sub.1-12 alkyl groups

Filled polyolefins stabilized with a combination of a hindered phenol

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

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

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

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 aromatic heterocyclic hydrazide derivatives of the formula: ##SPC1## Wherein A is a radical ##SPC2## Wherein R.sub.1 is tertiary alkyl and R.sub.2 and R.sub.3 are hydrogen or substituents, e.g. alkyl, R.sub.4 is a group -X-R.sub.14.sub.' wherein X is a bridging function, e.g. O, and R.sub.14 is a substituent, e.g. alkyl, a heterocyclic group --N Z wherein Z, with the nitrogen atom, forms a heterocyclic ring or a radical -NH-A, wherein A is as defined above, R.sub.5 has inter alia one of the significances of R.sub.4 and Y is -N= or -CH=, which are useful antioxidants, e.g. for stabilizing plastics material.

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Frick, Switzerland

Guenther Tscheulin