Title:
【発明の名称】新規置換ナフトピラン
Document Type and Number:
Japanese Patent JPH11510815
Kind Code:
A
Abstract:
Described are novel reversible photochromic 2H-naphtho[1,2-b]pyran compounds. Certain substituents are present at the 2 and 5 positions and sometimes at the 6 position of the naphthopyran ring. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.
Inventors:
Kumar, Anil
Knowles, David Bee
Ban Jemart, Barry
Knowles, David Bee
Ban Jemart, Barry
Application Number:
JP52221996A
Publication Date:
September 21, 1999
Filing Date:
December 12, 1996
Export Citation:
Assignee:
PPG INDUSTRIES, INCORPORATED
International Classes:
G02C7/10; C07D307/77; C07D311/78; C07D311/92; C07D311/94; C07D311/96; C07D405/04; C07D407/04; C07D413/04; C07D491/052; C07D493/04; C07D493/10; C07D495/04; C08K5/00; C08K5/15; C08K5/1545; C08L101/00; C09K9/02; G02B5/23; G02F1/17; G03C1/73; (IPC1-7): C07D311/92; C07D311/96; C07D405/04; C07D407/04; C07D413/04; C07D493/04; C09K9/02; G02F1/17
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)
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