Title:
PRODUCTION OF CONTACT LENS
Document Type and Number:
Japanese Patent JPH03288816
Kind Code:
A
Abstract:
PURPOSE:To assure graft polymn. and to uniformize the graft of a lens surface as well as to prevent the fluctuation with each solid by setting the polymn. time of a stage for graft polymn. of acrylamide on the lens surface at 5 to 90 minutes. CONSTITUTION:The polymer of the ester compd. of methacrylic acid which is the copolymer of at least the alkyl methacrylate and siloxanyl methacrylate of formula I (in the formula I, X and Y are selected from a group consisting of 1 to 5C alkyl group and Z group; Z is a group having formula II; A denotes 1 to 5C alkyl group; m, n denote 0 or positive integer) is used as a raw material. The polymn. time of the production process for the contact lens consisting of the stage for subjecting the surface of the base material of the contact lens to a discharge treatment under atm. pressure or reduced pressure and the stage for graft polymn. of the acrylamide on the lens surface is set at 5 to 90 minutes. The permanent enhancement of the effect of the subsequent surface reforming is possible in this way and the treatment in a large quantity and a drastic cost reduction are possible.
Inventors:
KIGUCHI HIROSHI
Application Number:
JP9071790A
Publication Date:
December 19, 1991
Filing Date:
April 05, 1990
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G02C7/04; B29D11/00; C08J7/18; G02C13/00; (IPC1-7): B29D11/00; C08J7/18; G02C7/04; G02C13/00
Domestic Patent References:
| JPS6210616A | 1987-01-19 | |||
| JPS6294819A | 1987-05-01 | |||
| JPS5142553A | 1976-04-10 |
Attorney, Agent or Firm:
Kazuo Sato (5 others)