Title:
CYCLOOLEFIN ADDITION POLYMER FILM OR SHEET
Document Type and Number:
Japanese Patent JP3832398
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a film or sheet which is prepared from a composition having excellent optical properties and heat resistance and containing a cycloolefin addition polymer prepared by using a norbornene monomer as the main material, is prepared by solution casting, has a decreased remaining solvent content without being thermally degraded, and is useful for an optical material.
SOLUTION: The composition containing a specific cycloolefin addition polymer is dissolved at 25°C in a solvent (1) capable of dissolving the polymer; then, the resultant solution is subjected to solution casting and brought into contact with a solvent (2) which does not dissolve the polymer but homogeneously mixes with solvent (1) and has a boiling point of 150°C or lower under the atmospheric pressure, thus giving the objective cycloolefin addition polymer film or sheet.
Inventors:
Katsutoshi Sawada
Youichi Ogata
Noboru Oshima
Youichi Ogata
Noboru Oshima
Application Number:
JP2002216682A
Publication Date:
October 11, 2006
Filing Date:
July 25, 2002
Export Citation:
Assignee:
JSR CORPORATION
International Classes:
C08J5/18; G02B1/04; B29C41/12; C08F32/00; B29K45/00; B29L7/00; (IPC1-7): C08J5/18; B29C41/12; C08F32/00; G02B1/04; //B29K45:00; B29L7:00; C08L45:00
Domestic Patent References:
| JP2001516804A |
Attorney, Agent or Firm:
Shigetaka Shirai