Title:
【発明の名称】新規のフォトクロミック有機材料
Document Type and Number:
Japanese Patent JPH11508943
Kind Code:
A
Abstract:
The invention relates to photochromic transparent organic materials presenting an index of refraction of more than 1.55, which are free of optical distortions and are prepared by radical polymerization of a polymerizable composition comprising: a) 80-95 wt. % of at least one monomer represented by general formula (I), where R = H or CH3, and m and n are independently 1 or 2; b) 5-20 wt.% of at least one aromatic monovinyl monomer represented by general formula (II) where R1 = H or CH3; c) an effective quantity of at least one dye that imparts photochromic properties to the material, selected from the groups of spiroxazines, spiropyrans and chromenes; d) an effective quantity of a chain transfer agent; and e) an effective quantity of a radical polymerization initiator, characterized in that the chain transfer agent is a linear alkanethiol and the radical polymerization initiator is a diazo compound.
Inventors:
Henri, David
Vial, jack jean
Vial, jack jean
Application Number:
JP50581797A
Publication Date:
August 03, 1999
Filing Date:
June 20, 1996
Export Citation:
Assignee:
Corning Incorporated
International Classes:
G02C7/10; C08F220/20; C08F222/10; C09K9/02; G02B1/04; G02B5/23; (IPC1-7): C09K9/02; C08F220/20; C08F290/06; G02B1/04; G02B5/23; G02C7/10
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)