Ciba Specialty Chemicals Corporation

Ciba-geigy Corporation

Basf Se Corporation

Ciba Corporation

Basf Se Ludwigshafen

Ciba Specialty Chem. Corp.

Gerrit Knobloch

Hans-Rudolf Meier

Pierre Rota-Graziosi

Samuel Evans

Michèle Gerster

Paul Dubs

Francesco Fuso

Peter Nesvadba

Reto Luisoli

Eva Peregi

Fabio Pizzoli

Heinrich Martin

There are described compositions comprising a) an emulsion crude rubber, synthetic latex or natural rubber latex subject to oxidative, thermal, dynamic and/or light-induced degradation, b) a compound of the formula (I) wherein Ris C-Calkyl, Ris hydrogen, C-Calkyl, cyclohexyl, 1-methylcyclohexyl, benzyl, &#x3b1;-methylbenzyl, &#x3b1;,&#x3b1;-dimethylbenzyl or &#x2014;CH&#x2014;S&#x2014;R, Ris C-Calkyl, benzyl, &#x3b1;-methylbenzyl, &#x3b1;,&#x3b1;-dimethylbenzyl or &#x2014;CH&#x2014;S&#x2014;R, Ris hydrogen or methyl, and c) a styrenated diphenylamine of the formula (II). 

Basic stabilisation systems for emulsion polymerised rubber

The invention describes a process for the manufacture of a filled rubber compound with improved processability which comprises mixing in one-step a) a rubber, b) a white reinforcing filler, and c) a coupling agent of the Formula (I), wherein the general symbols are as defined in claim, or an oligomeric hydrolysis product of the compound of the Formula (I). 

Filled rubber compounds with improved processability

The invention describes an improved method for the preparation of rubber compounds which comprises compounding the rubber and the components at 125-200&#xb0; C. in the presence of an amount of 0.1-2% based on the weight of the rubber of a processing stabilizer of the formula (I) wherein Ris hydrogen, C-Calkyl, styryl, &#x3b1;-methyl-styryl or &#x2014;CH&#x2014;S&#x2014;R; or C-Calkyl substituted with C-Calkenyl, C-Calkinyl, C-Ccycloalkyl, phenyl or tolyl; Ris C-Calkyl or &#x2014;CH&#x2014;S&#x2014;R, Ris C-Calkyl; with phenyl, hydroxyl, cyano, formyl, acetyl or &#x2014;O&#x2014;CO&#x2014;Rsubstituted C-Calkyl; C-Calkenyl, C-Calkinyl, C-Ccycloalkyl; or with hydroxyl, phenyl, 4-chloro-phenyl, 2-methoxycarbonylphenyl, p-tolyl, 1,3-benzthiazol-2-yl, &#x2014;(CHR)COORor &#x2014;(CHR)CONRRsubstituted C-Ccycloalkyl; Ris hydrogen or methyl, Ris hydrogen or C-Calkyl, Ris C-Calkyl; with oxygen or sulfur interrupted C-Calkyl; C-Ccycloalkyl, phenyl, benzyl or tolyl, Rand Rare independently of each other hydrogen or C-Calkyl, and n is 1 or 2. 

Processing stabilizers for rubber compounding

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

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 a composition comprising a) a naturally occurring or synthetic elastomer susceptible to oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation, b) a white reinforcing filler, and c) as coupling agent, at least one compound of the formula (I) wherein the general symbols are as defined in claim, or an oligomeric hydrolysis product of the compound of the formula (I). 

Coupling agents between filler and elastomer

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.

Growing community of inventors

Magden, Switzerland

Gerrit Knobloch