Silicone-containing contact lens material and contact lenses made thereof

• US 4,604,479 A
• Filed: 06/03/1983
• Issued: 08/05/1986
• Est. Priority Date: 12/04/1981
• Status: Expired due to Term

• Current Assignee: B&L International Holdings Corp.
• Original Assignee: Polymer Technology Group, Inc. (DSM-Firmenich AG)
• Inventors: Ellis, Edward J.
• Primary Examiner(s): Shaver, Paul F.
• Application Number:
  US06/501,293
• Time in Patent Office: 1,159 Days
• Field of Search: 556/440
• US Class Current: 556/440
• CPC Class Codes: C08F 283/124 on to polysiloxanes having carbon-to-carbon double bonds
• CPC Class Codes: C08F 30/08 containing silicon
• CPC Class Codes: C08L 43/04 Homopolymers or copolymers of monomers containing silicon
• CPC Class Codes: G02B 1/04 made of organic materials, e.g. plastics G02B1/08 takes precedence
• CPC Class Codes: G02C 7/04 Contact lenses for the eyes disinfection or sterilisation of contact lenses A61L12/00

Abstract

According to the invention contact lenses are formed of unsaturated, multifunctional, organosiloxanes alone or mixed with monofunctional organosilanes and in some cases a hardening agent such as methyl methacrylate, hydrophilic monomer wetting agents, and itaconate hydrophilic and hardening agents. The multifunctional organosiloxane adds higher impact strength and reduces brittleness, probably due to greater cross-linking density in the final product and retains the desirable properties of silicone-containing materials for use in contact lenses.

Claims

1. 1,7-Bis(γ

-methacryloxypropyl)-1,1,3,3,5,5,7,7-octa(trimethylsiloxy) tetrasiloxane.

2. 1,7-Bis(γ

-methacryloxypropyl)-1,1,7,7-tetra(pentamethyl disiloxanyl)-3,3,5,5-tetra(trimethylsiloxy)tetrasiloxane.