Polymers and copolymers based on alkenoyl-oxybenzylidene-malonic esters as UV-absorbers and polymers stabilized therewith
AssigneeBayer Aktiengesellschaft
InventorsDieter Margotte, Burkhard Lachmann, Hugo Vernaleken, Hans Rudolph, Wolfgang Cohnen
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Abstract
Homopolymers and copolymers based on alkenoyloxybenzylidene-malonic esters of the formula ##SPC1## Where R.sup.1 is hydrogen or C.sub.1 to C.sub.4 -alkyl; R.sup.2 is C.sub.1 to C.sub.12 -alkyl or cycloalkyl and R.sup.3 is hydrogen, C.sub.1 to C.sub.8 -alkyl, C.sub.1 to C.sub.8 -alkoxy or halogen, and plastics, i.e., polycarbonates, stabilized therewith.
Claims11
A method of stabilizing synthetic organic polymers comprising blending the polymer with from 0.05 to 10% by weight, based on the weight of the said polymer, of a UV-light absorbing polymer containing groups of the formula:
- ##SPC8##
- wherein
- R.sup.1 is hydrogen or alkyl with C.sub.1 to C.sub.4 ;
- R.sup.2 is alkyl with C.sub.1 to C.sub.12 or cycloalkyl;
- and
- R.sup.3 is hydrogen, alkyl with C.sub.1 to C.sub.8, alkoxy with C.sub.1 to C.sub.8 or halogen.
Polycarbonate molding compositions containing an effective amount of UV-light absorbing polymers, said polymers comprising UV-light absorbing groups of the formula ##SPC9##
- wherein
- R.sup.1 is hydrogen or alkyl with C.sub.1 to C.sub.4 ;
- R.sup.2 is alkyl with C.sub.1 to C.sub.12 or cycloalkyl;
- and
- R.sup.3 is hydrogen, alkyl with C.sub.1 to C.sub.8, alkoxy with C.sub.1 to C.sub.8 or halogen.
Dependencies are inferred from the claim text.