Copolimero; copolimero hydrogel; copolimero non hydrogel; contact lens material permeavel gas and compound and their preparation processes;

摘要

Novel monomers of the general formula CHEM where b is 0 or 1, a is 1, 2, 3 or 4, R2 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.