Hydrophilic copolymers

Details Hydrophilic copolymers Hydrophilic copolymers

1974-12-09

1977-06-28

Ziegler, J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

351166, 260895, C08L 3312

Patent

active

040325997

ABSTRACT:
A hydrophilic copolymer suitable for contact lenses comprises units derived from acrylic acid or methacrylic acid or from a hydrophilic monomer, such as N-vinyl 2-pyrrolidone or 4-vinyl pyridine, containing at least one heterocyclic group as a major hydrophilic unit. The copolymer preferably contains units derived from a hydrophobic monomer, such as methyl methacrylate, and it may also contain units derived from a crosslinking agent and an ethylene oxide-propylene oxide block copolymer. The copolymers are capable of absorbing large quantities of water and are particularly suitable for use in contact with living tissue.

REFERENCES:
patent: 3530201 (1970-09-01), Schwarcz
patent: 3532679 (1970-10-01), Steckler
patent: 3721657 (1973-03-01), Seiderman

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