Title:
PRODUCTION OF CONTACT LENS
Document Type and Number:
Japanese Patent JPH03288817
Kind Code:
A
Abstract:
PURPOSE:To allow the execution of a stage for graft polymn. of acrylamide on a lens surface at a low temp. by adding ferrous ammonium sulfate (Mohr's salt) to an aq. acrylamide soln. in the above-mentioned stage. 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 ferrous ammonium sulfate (Mohr's salt) is added to the aq. acrylamide soln. in 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. The low-temp. graft treatment is possible in this way and the lens is relieved from severe treating conditions.
Inventors:
KIGUCHI HIROSHI
Application Number:
JP9073090A
Publication Date:
December 19, 1991
Filing Date:
April 05, 1990
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G02C7/04; B29D11/00; C08F275/00; C08F290/06; C08G77/20; C08J7/18; (IPC1-7): B29D11/00; C08J7/18; G02C7/04
Attorney, Agent or Firm:
Kisaburo Suzuki (1 outside)