PHOTOCHROMIC BENZOPYRANO-FUSED NAPHTHOPYRANS

Title:

PHOTOCHROMIC BENZOPYRANO-FUSED NAPHTHOPYRANS

Document Type and Number:

WIPO Patent Application WO2000002884

Kind Code:

A3

Abstract:

Described are novel photochromic benzopyrano-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted benzopyran group fused to one side of the naphtho portion of the naphthopyran and having certain substituents at the position ortho to the oxygen atom of the naphthopyran ring. These compounds may be represented by the following graphic formulae (Ia), (Ib), (Ic), (Id). Also described are polymeric organic host materials that contain or that are coated with such compounds or combinations thereof with complementary photochromic compounds, e.g., certain other naphthopyrans, benzopyrans, and spiro(indoline)type compounds.

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Inventors:

KUMAR ANIL

Application Number:

PCT/US1999/015525

Publication Date:

February 24, 2000

Filing Date:

July 09, 1999

Export Citation:

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Assignee:

PPG IND OHIO INC (US)

International Classes:

C07D493/04; G03C1/685; (IPC1-7): C07D493/04; C08K5/15; G02B5/23

Domestic Patent References:

WO1999028323A1	1999-06-10
WO1998028289A1	1998-07-02

Foreign References:

US5679805A	1997-10-21
US5674432A	1997-10-07
US5651923A	1997-07-29
US5451344A	1995-09-19

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