Back to results
US 4,228,067 AGranted
UV Light stabilized polycarbonate composition
AssigneeBayer Aktiengesellschaft
InventorsBurkhard Lachmann, Hans Rudolph, Wolfgang Cohnen
Life of this patent
Estimating the term…
Abstract
Object of the invention are UV absorbents for numerous polymers which are distinguished by their comparative lack of self-color, high light absorption and good compatibility with the polymers as well as with other additives.
Claims4
A composition comprising an aromatic mixture of a polycarbonate subject to degradation by UV light and a light stabilizing amount of a UV absorbent compound of the formula ##STR9## wherein R is hydrogen, alkyl having 1 to 12 carbon atoms or cyclohexyl.
Dependencies are inferred from the claim text.