Ciba Specialty Chemicals Corporation

Ciba-geigy Corporation

Margot Clauss

Michael Roth

Francesco Fuso

Wiebke Wunderlich

Gerhard Rytz

Bernard Gilg

Werner Stauffer

The present invention relates to a polymerizable composition, comprising Further objects of the present invention are a process for polymerization and the use of compounds of formula I for the polymerization of ethylenically unsaturated monomers.

Use of 2,2,6,6 tetraalkylpiperidine-N-oxyl radicals having long alkyl chains as polymerization regulators

The present invention relates to a polymerizable composition, comprising a) at least one ethylenically unsaturated monomer or oligomer, b) a radical source capable of starting polymerization of the ethylenically unsaturated monomer or oligomer and c) at least one compound of formula (I), wherein n is 1 or 2; R , R , R , R are each independently of one another C -C alkyl, C -C alkenyl or C -C alkinyl; or R and R and/or R and R form together with the linking carbon atom a C -C cycloakyl radical; R , R , R , R are each independently of one another hydrogen, C -C alkyl, C -C alkenyl or C C alkinyl; X is &mdash;O&mdash;, &mdash;O&mdash;C(O)&mdash;, &mdash;NR &mdash; or &mdash;NR &mdash;C(O)&mdash;; R is hydrogen, C -C alkyl or phenyl; if n is 1, R is C -C alkyl, C -C alkenyl or C -C alkinyl; if n is 2, R is C -C alkylen, C -C alkenylen or C -C alkinylen. Further objects of the present invention are a process for polymerization and the use of compounds of formula (I) for the polymerization of ethylenically unsaturated monomers.

Described are compositions protected against thermal and oxidative degradation, comprising

Polyether polyol and polyurethane compositions protected against

ABS copolymers and similar styrene or .alpha.-methylstyrene copolymers which contain an elastomer phase are stabilized against light-induced degradation by a) incorporation of a copolymerizable sterically hindered amine in, and b) addition of a non-copolymerizable sterically hindered amine to, the copolymer. Preferred sterically hindered amines are polyalkylpiperidines.

Process for the preparation of stabilized styrene copolymers containing

ABS copolymers and similar styrene or .alpha.-methylstyrene copolymers with contain an elastomer phase are stabilized against light-induced degradation by a) incorporation of a copolymerizable sterically hindered amine in, and b) addition of a non-copolymerizable sterically hindered amine to, the copolymer. Preferred sterically hindered amines are polyalkylpiperidines.

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Riedisheim, France

Margot Clauss