Long-wearable soft contact lens

• US 20040192872A1
• Filed: 03/19/2004
• Published: 09/30/2004
• Est. Priority Date: 12/16/1999
• Status: Abandoned Application

• Current Assignee: Coopervision International Limited (The Cooper Cos., Inc.)
• Original Assignee: AsahiKasei Aime Co. Ltd. (Asahi Kasei Corporation)
• Inventors: Ikawa, Seiichirou, Iwata, Junichi, Hoki, Tsuneo
• Application Number:
  US10/804,161
• Publication Number:
  US 20040192872A1
• Time in Patent Office: Days
• US Class Current: 528/25
• CPC Class Codes: B29D 11/00125 Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere
• CPC Class Codes: C08F 220/1806 C6-(meth)acrylate, e.g. (cyclo)hexyl (meth)acrylate or phenyl (meth)acrylate
• CPC Class Codes: C08F 220/54 Amides , e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
• CPC Class Codes: C08F 222/102 of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
• CPC Class Codes: C08F 226/02 by a single or double bond to nitrogen
• CPC Class Codes: C08F 226/10 N-Vinyl-pyrrolidone
• CPC Class Codes: C08F 230/08 containing silicon
• CPC Class Codes: C08F 283/12 on to polysiloxanes
• CPC Class Codes: C08F 290/06 Polymers provided for in subclass C08G
• CPC Class Codes: C08F 290/061 Polyesters; Polycarbonates
• CPC Class Codes: C08F 290/065 Polyamides; Polyesteramides; Polyimides
• CPC Class Codes: C08F 290/068 Polysiloxanes
• CPC Class Codes: C08L 43/04 Homopolymers or copolymers of monomers containing silicon
• CPC Class Codes: C08L 51/085 on to polysiloxanes
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: G02B 1/043 Contact lenses
• CPC Class Codes: G02C 7/04 Contact lenses for the eyes disinfection or sterilisation of contact lenses A61L12/00

Abstract

The present invention relates to a soft contact lens, and provides a contact lens which shows small and stable contact angle to water at its surface in water as well as in air, little deposition in wearing, high oxygen permeability, no adhesion of lens to a cornea and superior extended-wearing characteristics. The present invention provides a hydrogel soft contact lens which has contact angle at a lens surface in a range of 10-50° by the captive bubble method in water and 30-90° by the sessile drop method in air, oxygen permeability of not less than 30 and water content of not less than 5%, and also a hydrogel soft contact lens consisting of a polymer comprising a hydrophilic siloxanyl monomer shown by a specified general formula.

Claims

1. A mold for producing a contact lens, which mold is capable of forming both front and rear surfaces of said contact lens from a surface of said mold during polymerization of a monomer composition in said mold and comprises a resin selected from the group consisting of nylon 66 and nylon 6, polyethylene terephthalate and ethylene-vinylalcohol copolymer.

3. The mold according to claim 1, wherein said contact lens is a contact lens with contact angle of a surface in a range of 10-50°

and 30-90°

by the captive bubble method in water and the sessile drop method in air, respectively, oxygen permeability of not less than a dK value of 30 and water content of not less than 5% by weight.

4. A mold for producing a contact lens according to claim 1, wherein said contact lens is a hydrogel soft contact lens manufactured by a polymerization of at least one kind of siloxane monomer.

5. A mold for producing a contact lens according to claim 1, wherein said contact lens is a hydrogel soft contact lens manufactured by a copolymerization of at least one kind of hydrophilic polysiloxane monomer of the formula (1) and at least one kind of a hydrophilic monomer:

2. A mold for producing a contact lens, which mold is capable of forming both front and rear surfaces of said contact lens from a surface of said mold during polymerization of a monomer composition in said mold and comprises a resin comprising ethylene-vinylalcohol copolymer.

6. A mold for producing a contact lens according to claim 2, wherein said contact lens is a contact lens manufactured by a copolymerization of at least a kind of siloxane group-containing monomer and at least one kind of hydrophilic monomer.