Patent ID: 7049381

Claim:
A polymerized monomeric composition comprising: (a) from 35 to 70 parts by weight of one or more monomers (I) of formula: wherein R 1 and R 2 represent H or CH 3 , A is a divalent moiety of formula: m1 and m2 each are an integer in the range of 4 to 20, (b) from 5 to 50 parts by weight of a monomer (II) comprising a formula: wherein Q moiety is a divalent moiety comprising a formula: wherein X represents a straight or a branched divalent alkyl chain comprising 1 to 12 carbon atoms, and R′ 1 and R′ 2 independent from one another represent H or CH 2 ; W is a divalent alkyl moiety, with a straight or branched structure, comprising from 1 to 5 carbon atoms; n varies from 2 to 4; R represents H or CH 3 ; and R 1 represents H or a valence link; and (c) from 5 to 40 parts by weight of a monomer (III) with a high Abbe number comprising at least one non aromatic cyclic or polycyclic hydrocarbon moiety and further comprising one or more methacrylate functions, the total of the monomers (I), (II), and (III) representing 100 parts by weight.