IMIDAZOLIUM ZWITTERIONIC POLYMERISABLE COMPOUNDS AND OPHTHALMIC DEVICES CONTAINING THEREOF Russian patent published in 2025 - IPC C07D231/00 A61F2/14 C08F220/56 C08F26/06 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a zwitterionic polymerisable compound of

formula I

where R¹, R² and R³ independently represent H, C₁-C₆ alkyl; each of L¹ and L² independently represents C₂-C₆ alkylene; and R_g is (meth)acrylamide, also relates to a contact lens comprising a polymer obtained from a zwitterionic polymerisable compound, where the polymer contains a product of a free radical reaction of the compound and one or more monomers suitable for making a contact lens, where the monomer is selected from a hydrophilic component, also relates to a blister package comprising a contact lens and a packaging solution, wherein the packaging solution contains a polymer obtained from a polymerisable zwitterionic compound.

EFFECT: present inventions provide the development of novel zwitterionic polymerisable compounds which are acceptable for use in ophthalmic devices, such as contact lenses, ophthalmic devices, which show favorable properties, including high water content, which is especially desirable for hydrogel contact lenses, blister packaging.

10 cl, 4 tbl, 6 ex