Title:
光互変性ポリウレタンラテックスの調製方法およびその眼用光学物品への適用方法
Document Type and Number:
Japanese Patent JP2004502842
Kind Code:
A
Abstract:
The method of the invention comprises: a) forming a hydrophilic polyurethane prepolymer with isocyanate end groups, by the polyaddition reaction of at least one polyol and at least one diisocyanate in the presence of at least one internal emulsifying agent; b) mixing the polyurethane prepolymer with a photochromic agent; c) adding water or a mixture of water and solvent, under agitation, to the mixture of the polyurethane prepolymer and the photochromic agent, to form an emulsion; and d) adding at least one chain extension agent to the emulsion and performing a chain extension reaction to give the final photochromic polyurethane latex. Application to the production of ophthalmic articles having photochromic properties.
Inventors:
Vasal Natalie
Veron Jean-Pierre
Charles Vernadette
Tardu pascal
Maisonie Sylvette
Cano Jean-Paul
Veron Jean-Pierre
Charles Vernadette
Tardu pascal
Maisonie Sylvette
Cano Jean-Paul
Application Number:
JP2002509394A
Publication Date:
January 29, 2004
Filing Date:
July 06, 2001
Export Citation:
Assignee:
Essilor Aterna Zionard Company Generale De Optics
International Classes:
G02C7/02; C08G18/00; C08G18/08; C08G18/12; C08G18/42; C08G18/66; C08K5/3437; C08K5/357; G02C7/10; G02B5/23; (IPC1-7): C08G18/00; G02C7/02; G02C7/10
Attorney, Agent or Firm:
Nozomi Watanabe
Haruko Sanwa
Haruko Sanwa