NOVEL VINYL (AND ALLYL) CARBONATE AND CARBAMATE CONTACT LENS MATERIAL MONOMERS

摘要

Novel monomers of the general formula where b is 0 or 1, a is 1, 2, 3 or 4, R<2> is a monovalent alkyl radical and R is an organic radical. The novel monomers may be employed to produce novel copolymers useful as hydrogel, soft non-hydrogel and/or rigid gas permeable contact lens materials.