Title:
偏光光学素子およびポリウレタン含有フィルムを調製する方法
Document Type and Number:
Japanese Patent JP2009540064
Kind Code:
A
Abstract:
Described is a method of preparing a cured, non-elastomeric polyurethane-containing film including: a) providing as a first component comprising a polyurethane material having isocyanate functional groups; b) providing as a second component a material having active hydrogen-containing functional groups that are reactive with isocyanate; c) combining the first and second components to form a reaction mixture; d) casting the reaction mixture onto a support substrate in a substantially uniform thickness to form a film thereon; e) heating the film on the support substrate to a temperature and for a time sufficient to yield a cured film; and f) removing the cured film from the support substrate to yield a non-elastomeric polyurethane-containing free film. The free film is non-birefringent. Optical elements and articles prepared from the films are also provided.
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Inventors:
Nagpal, Biddie Jay.
Kumar, Anil
Knox, Carol El.
Chang, Inchao
Forler, Peter Sea.
Kumar, Anil
Knox, Carol El.
Chang, Inchao
Forler, Peter Sea.
Application Number:
JP2009514528A
Publication Date:
November 19, 2009
Filing Date:
June 07, 2007
Export Citation:
Assignee:
P.P.G Industries Ltd. Ohio Incorporated
International Classes:
C08G18/08; C08J5/18; G02B5/30; G02F1/1335
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita