Title:
PRODUCTION OF CONTACT LENS
Document Type and Number:
Japanese Patent JPH04295819
Kind Code:
A
Abstract:
PURPOSE:To allow a sure and uniform surface graft polymn. treatment by immersing a specific lens base material into a monomer soln., then deaerating the soln. by specifying the time for impression of ultrasonic waves under a vacuum. CONSTITUTION:The polymer of the ester compd. of acrylic acid or methacyrlic acid which is a copolymer contg. at least either of the compds. expressed by formulas I, II, etc., is used as a raw material. The dissolved oxygen in the aq. soln. essentially consisting of the hydrophilic monomer is removed by impressing the ultrasonic waves thereto for >=10 seconds and <=10 minutes under the vacuum in a stage for graft polymerizing the hydrophilic monomer to the lens surface after the surface of the base material is subjected to an electric discharge treatment. In the formula I, R denotes CH3 or H; X and Y denote 1 to 6C alkyl, cycloalkyl, phenyl, etc.; m denotes 1 to 3; n denotes 1 to 5. In the formula II, R denotes CH3 or H; A denotes H, cyclohexyl, phenyl or Rf; Rf denotes a polyfluoroalkyl group or pentafluorophenyl group. The compd. expressed by this formula II has fluorine atoms not more than 20 pieces.
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Inventors:
AOYAMA HIROSHI
KIGUCHI HIROSHI
KIGUCHI HIROSHI
Application Number:
JP6190991A
Publication Date:
October 20, 1992
Filing Date:
March 26, 1991
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
C08F220/22; C08F20/22; C08F30/08; C08F32/00; C08F230/08; C08F232/08; C08F265/00; C08F265/06; G02C7/04; (IPC1-7): C08F220/22; C08F230/08; C08F232/08; C08F265/06; G02C7/04
Attorney, Agent or Firm:
Kisaburo Suzuki (1 outside)
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