Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Rita Pitteloud

Paul Dubs

Bernard Gilg

Horst Zinke

Rudolf Maul

Peter Hofmann

Eduard Troxler

Volker Schenk

Raymond R Seltzer

Michael Rasberger

Paul A Odorisio

Sai Ping Shum

Andreas Valet

Hans-Rudolf Meier

Roswell E King, Iii

Wha Chen

The invention relates to novel compounds of the formula I in which the general symbols are as defined in claim 1, as stabilizers for organic materials against oxidative, thermal or light-induced degradation.

HALS phosphites and HALS phosphoramides as stabilizers

Compounds of the formula I ##STR1## in which the general symbols are as defined in claim 1, as stabilizers for organic materials against thermal, oxidative or light-induced degradation are described.

Cyclic diphenylacetonitriles as stabilizers

A mixture containing two different compounds of the formula (I) ##STR1## wherein n is an integer from 2 to 22 and R is hydrogen, C.sub.1 -C.sub.8 alkyl, --O.multidot., --OH, --NO, --CH.sub.2 CN, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.12 cycloalkoxy, C.sub.3 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.8 acyl or C.sub.7 -C.sub.9 phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C.sub.1 -C.sub.4 alkyl; the weight ratio of the two compounds being 1:20 to 20:1, is useful as stabilizer for organic materials against degradation induced by light, heat or oxidation.

Mixtures of polyalkylpiperidin-4-yl dicarboxylic acid esters as

The invention relates to novel compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, as stabilizers for organic materials against oxidative, thermal or light-induced degradation.

Hals phosphorinanes as stabilisers

Novel oligomeric compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, are disclosed as stabilisers for protecting organic material against oxidative, thermal or light-induced degradation.

Oligomeric hals phosphites and hals phosphonites as stabilisers

The invention relates to novel compounds of formula I ##STR1## wherein X is a direct bond, sulfur or --CHR.sub.5 --, R.sub.1 is hydrogen, C.sub.1 -C.sub.25 alkyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.8 cycloalkyl; unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.8 cycloalkenyl; unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted phenyl; C.sub.7 -C.sub.9 phenylalkyl or --CH.sub.2 --S--R.sub.6 ; R.sub.2 is hydrogen, C.sub.1 -C.sub.25 alkyl, C.sub.2 -C.sub.24 alkenyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.8 cycloalkyl; unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.8 cycloalkenyl; unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted phenyl; C.sub.7 -C.sub.9 -phenylalkyl or --CH.sub.2 S--R.sub.6 ; R.sub.3 is hydrogen or methyl; R.sub.4 is C.sub.1 -C.sub.8 alkyl, O.sup..cndot., OH, NO, --CH.sub.2 CN, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.12 cycloalkoxy, C.sub.3 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.87 acyl, C.sub.7 -C.sub.9 phenylalkyl which is unsubstituted or substituted at the phenyl ring by C.sub.1 -C.sub.4 alkyl; R.sub.5 is hydrogen or C.sub.1 -C.sub.8 alkyl; and R.sub.6 is C.sub.1 -C.sub.20 alkyl, as stabilisers for protecting organic materials against oxidalive, thermal or light-induced degradation.

Hals phosphoramides as stabilisers

The invention relates to novel compounds of the formula I ##STR1## in which the general symbols are as defined in claim 1, as stabilizers for organic materials against oxidative, thermal or light-induced degradation.

Hals phosphonites as stabilizers

The invention relates to novel oligomeric compounds of the formula I ##STR1## in which L is a group of the formula ##STR2## where the oxygen in the group L is in each case bonded to the phosphorus in the recurring structural units and the radical R.sub.2 or the carbon in the 4-position of the piperidinyl ring in the group L is in each case bonded to the oxygen in the recurring structural units; and the general symbols are as defined in claim 1, as stabilizers for organic materials against oxidative, thermal or light-induced degradation.

Oligomeric aliphatic HALS phosphites and HALS phosphonites as stabilizers

The novel compounds of the formula I ##STR1## in which A is a group of the formula IIa or IIb, ##STR2## Y is oxygen, methylene, ethylidene or a &gt;C.dbd.C(CH.sub.3).sub.2 group, Z is nitrogen, ##STR3## R.sub.1 and R.sub.2 are, for example C.sub.1 -C.sub.5 alkyl, R.sub.3 and R.sub.4 are, for example, hydrogen or methyl, and R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13 and R.sub.14 are, for example, hydrogen, are suitable for stabilizing organic material against oxidative, thermal or light-induced degradation.

Bisphenol ester derivatives

Stabilisers of formula I ##STR1## wherein R.sub.1 and R.sub.2 may be C.sub.1 -C.sub.5 alkyl, the substituents R.sub.3 to R.sub.8 may be hydrogen, the variable n may be 1 or 2, and, when n is 1, A may be an alkoxy radical, and, when n is 2, A may be a diamine radical.

Selected alkanolamine esters of acyclic phosphites are particularly effective as process stabilizers for polyolefins providing for melt flow stabilization and resistance to discoloration during said processing.

Alkanolamine esters of acyclic phosphites in polyolefin compositions

The novel compounds of the formula I ##STR1## in which n is an integer from the range from 4 to 8 and m is an integer from the range from 1 to 4,

Carboxylic acid esters of hydroxyphenylalkanols as stabilizers

Compositions comprising an organic material which is sensitive to thermal, oxidative and/or actinic degradation and at least one compound of the formula I ##STR1## in which Z.sub.1 and Z.sub.2 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, phenyl-C.sub.1 -C.sub.4 alkyl or (C.sub.1 -C.sub.4 alkyl)phenyl and

Alkanediphenols

Compounds of formula I ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, C.sub.1 -C.sub.24 alkyl, phenyl-substituted C.sub.1 -C.sub.4 alkyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.8 cycloalkyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted phenyl, with the proviso that both substituents R.sub.1 and R.sub.2 are not simultaneously hydrogen,

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Praroman, Switzerland

Rita Pitteloud