Uv absorbing vinyl monomers and polymers and ocular implants prepared therefrom

Abstract From the Canadian patent

The invention provides an ultraviolet light absorbing polymerizable monomer having the structure: or , Wherein: Z is N or -CH-, R is H or CH3 R1 and R2 may be the same or, different and are H alkyl or alkyloxy having from 1, to 20 carbon atoms alkylcarboxy having from 2 to 20, carbon atoms arylcarboxy having from 7 to 25 carbon atoms or hydroxyl;, R3 is H, hydroxyl, hydroxyalkyl having from 1 to 20 carbon atoms or siloxy; R4, R5, R6 and R7 may be, the same or different and as H or halogen; x is an integer from 1 to 20; or, a homopolymer thereof; or a copolymer thereof with an, ethylenically unsaturated comonomer said copolymer, comprising an ultraviolet light absorbing effective amount of …