Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Ciba Corporation

Basf Se Ludwigshafen

Ciba Specialty Chem. Corp.

Ciba Holding Inc.

Hans-Rudolf Meier

Gerrit Knobloch

Samuel Evans

Paul Dubs

David G Leppard

Adalbert Braig

Emyr Phillips

Robert C Wasson

Michèle Gerster

Pierre Rota-Graziosi

Peter Hofmann

Peter Nesvadba

Hans-Werner Schmidt

Siegfried Rosenberger

Rita Pitteloud

Ivan Orban

Eduard Troxler

Klaus H Stoll

Reto Luisoli

Werner Stegmann

Markus Blomenhofer

Fabio Pizzoli

Klaus Stoll

Polymers grafted with a compound of formula I, wherein the general symbols are as defined within, have outstanding stability against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation.

Sulfoxides or sulfones grafted onto polymers

The instant invention discloses a process for preventing contact discoloration of substrates coming into contact with elastomers and stabilizing elastomers to prevent oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation, which comprises incorporating into the elastomers, or applying to these, at least a compound of the formula (I) wherein Ris C-Calkyl, Ris C-Calkyl, or Rand Rtogether with the carbon atom to which they are attached form an unsubstituted or with C-Calkyl substituted C-Ccycloalkyl ring; Ris hydrogen or &#x2014;CH&#x2014;S(O)&#x2014;R, Rand Rindependently of each other are unsubstituted or with cyano substituted C-C-alkyl; C-Cphenylalkyl, unsubstituted or with halogen, hydroxyl, cyano or C-Calkyl substituted phenyl or naphthyl; benzothiazolyl or &#x2014;R&#x2014;CO&#x2014;R, Ris C-Calkylene, Ris C-Calkyl, and m is 0, 1 or 2. The instant invention discloses also novel compounds of the formula (I), new mixtures of compounds of the formula (I) and compositions thereof in elastomers. 

Non-staining antidegradants for vulcanized elastomers

A composition containing a) a natural or synthetic polymer and b) one or more compounds of the formula (I), (II) or (III) wherein R, Rand Ror Y, Yand Yor Z, Zand Zare e.g. branched C-Calkyl. 

Amide nucleating agent compositions

The invention describes novel compound of the formula I, wherein the general symbols are as defined in claim, as stabilizers for protecting organic materials, in particular synthetic polymers, against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation.

Graftable hindered amine light stabilizers

The invention describes novel compound of the formula (I), wherein the general symbols are as defined in claim, as stabilizers for protecting organic materials, in particular synthetic polymers, against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation. 

Elastomers which have excellent stability to prevent oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation comprise, as stabilizers, at least one compound of the formula I[R&#x2014;S(&#x2550;O)&#x2014;CH&#x2014;CH(OH)&#x2014;CH]&#x2014;N(R)&#x2014;R, &#x2003;&#x2003;(I)in which and, if n is 1 and Ris hydrogen, R may additionally be 

Stabilizers and antiozonants for elastomers

Polymers grafted with a compound of formula I, formula (I) wherein the general symbols are as defined in claim 1, have outstanding stability against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation[R&#x2014;SOR&#x2014;SO&#x2014;R.&#x2003;&#x2003;(I)

Elastomers which have excellent stability to prevent oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation comprise, as stabilizers, at least one compound of the formula (I): &lsqb;R&mdash;S(&boxH;O) &mdash;CH &mdash;CH(OH)&mdash;CH &rsqb; &mdash;N(R ) &mdash;R , in which R is C -C alkyl, hydroxyl-substituted C -C alkyl; phenyl, benzyl, &agr;-methylbenzyl, &agr;,&agr;-dimethylbenzyl, cyclohexyl or &mdash;(CH ) COOR , and, if m is 0, R may additionally be (a); and, if n is 1 and R is hydrogen, R may additionally be R &mdash;R N&mdash;CH &mdash;CH(OH)&mdash;CH &mdash;S(&boxH;O) &mdash;(CH ) &mdash; or R &mdash;R N&mdash;CH &mdash;CH(OH)&mdash;CH &mdash;S(&boxH;O) &mdash;CH &mdash;CH &mdash;(OCH &mdash;CH ) &mdash;, R is hydrogen, cyclohexyl or C -C alkyl, R is (b), R is C -C alkyl, R is hydrogen or &mdash;CH &mdash;CH(OH)&mdash;CH &mdash;S(&boxH;O) &mdash;R, X is C -C alkyl, Y is C -C alkyl, m is 0 or 1, n is 1 or 2, q is 1 or 2, x is from 2 to 6, and y is 1 or 2. The compounds of the formula (I) are also suitable as stabilizes for elastomers to prevent contact discoloration of substrates coming into contact with elastomers.

Stabilizers for emulsion crude rubbers, synthetic latex and natural rubber latex

Process for the preparation of mercaptomethylphenois

Thiodipropionic acid bisamides as stabilizers for nonblack elastomers

Elastomers that have excellent stability towards oxidative, light- or ozone-induced degradation comprise as stabilizers at least one compound of the benzofuran-2-one type.

Stabilizers and anti-ozonants for elastomers

Antioxidants containing phenol groups and aromatic amine groups

Sulfoxides of alkylthiomethylphenols of the formula I ##STR1## in which R.sub.1 is hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.5 -C.sub.7 cycloalkenyl, phenyl or C.sub.7 -C.sub.9 phenylalkyl, R.sub.2 is hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.5 -C.sub.7 cycloalkenyl, phenyl, C.sub.7 -C.sub.9 phenylalkyl or a radical --CH.sub.2 --SO--R.sub.5, in which R.sub.5 is C.sub.8 -C.sub.20 alkyl which may be interrupted by --O--, --S-- or --SO-- groups, mono- or dihydroxy-substituted C.sub.2 -C.sub.12 alkyl, phenyl, benzyl, --(CH.sub.2).sub.n COOR.sub.6 or --CH(CH.sub.3)COOR.sub.6, in which R.sub.6 is C.sub.1 -C.sub.20 alkyl and n is 1 or 2, R.sub.3 is hydrogen or a group --CH.sub.2 --SO--R.sub.5, in which R.sub.5 is as defined above, and R.sub.4 has the same meanings as R.sub.2 , with the proviso that only one of the radicals R.sub.2, R.sub.3 or R.sub.4 is the group --CH.sub.2 --SO--R.sub.5 and that, if R.sub.4 is --CH.sub.2 --SO--R.sub.5 and R.sub.1 and R.sub.2 are simultaneously tert-butyl or tert-amyl, R.sub.5 is not C.sub.8 -C.sub.14 alkyl, or mixtures of these compounds with the corresponding non-oxidised compounds are suitable for stabilising organic materials which are sensitive to oxidative, thermal and/or light-induced degradation.

Sulfoxides of alkylthiomethylphenols

Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.

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Basel, Switzerland

Hans-Rudolf Meier