Title:
【発明の名称】共重合法及びそれにより製造された光学共重合体
Document Type and Number:
Japanese Patent JPH06500811
Kind Code:
A
Abstract:
PCT No. PCT/EP91/01691 Sec. 371 Date Apr. 16, 1993 Sec. 102(e) Date Apr. 16, 1993 PCT Filed Sep. 5, 1991 PCT Pub. No. WO92/05209 PCT Pub. Date Apr. 2, 1992.A process for preparing a copolymer suitable for use in an optical element which comprises the step of radically-polymerizing a composition which comprises at least one first monomer represented by formula (I), at least one second monomer represented by any one of formulas (II, III, and IV), and 0,005 to 1.0 weight percent of said polymerizable composition of an organic chain transfer agent having a chain transfer coefficient at 50 DEG -60 DEG C. of greater than 0.6 with acrylic monomer or styrenic monomer; in the presence of a radical polymerization initiator, is disclosed. Also disclosed is a copolymer suitable for use as an optical element obtained by the foregoing process and an optical element comprising this copolymer. The process of the disclosure provides essentially striation-free polymers which can be used to fabricate optical elements including thick lenses for glasses.
Inventors:
Brand, johans
Brewer, Wilfridas, Maria
Brewer, Wilfridas, Maria
Application Number:
JP51434591A
Publication Date:
January 27, 1994
Filing Date:
September 05, 1991
Export Citation:
Assignee:
Akzo Namrose Fennaught Shap
International Classes:
C08F212/14; C08F2/38; C08F12/00; C08F20/10; C08F20/22; C08F212/00; C08F212/32; C08F212/34; C08F220/22; C08F220/28; C08F220/30; C08F290/00; C08F299/02; G02B1/04; G02C7/02; G03F7/004; G03F7/027; (IPC1-7): C08F212/34; C08F212/14; C08F212/32; C08F220/22; C08F220/28; C08F299/02; G02B1/04; G02C7/02; G03F7/004; G03F7/027
Attorney, Agent or Firm:
Mitsuo Matsui