Patent ID: 6478988
Filing Date: 2002-11-12
Classification: G02B,Y10T

Abstract:
A photochromic article comprising a transparent substrate having at least one coating comprising an optical organic resin and a photochromic amount of a photochromic naphthopyran comprising a 3,3-[substituted]-naphtho[2,1-b]pyran or a 2,2-[substituted]-naphtho[1,2-b] wherein:a) one 3-position substituent on a 3,3-[substituted]-naphtho[2,1-b]pyran comprises a phenyl group or b) one 2-position on a 2,2-[substituted]-naphtho[1,2-b]pyran comprises a phenyl group and another of the 3-positions on the 3,3-[substituted]-naphtho[2,1-b]pyran or another of the 2-positions on the 2,2-[substituted]-naphtho[1,2-b]pyran comprises a substituted phenyl group having a substituent on the substituted phenyl group selected from the group consisting of an anthranilyl, azepinyl, benzoxazolyl, diazepinyl, diazolyl, imidazolidinyl, imidazolyl, imidazolinyl, indazolyl, indoleninyl, indolinyl, indolizinyl, indolyl, indoxazinyl, isobenzazolyl, isoindolyl, isooxazolyl, isooxazyl, isopyrrol, isoquinolyl, isothiazolyl, morpholino, morpholinyl, oxadiazolyl, oxathiazolyl, oxathiazyl, oxathiolyl, oxatriazolyl, oxazolyl, piperazinyl, piperazyl, piperidyl, purinyl, pyranopyrrolyl, pyrazinyl, pyrazolidinyl, pyrazolinyl, pyrazolyl, pyrazyl, pyridazinyl, pyridazyl, pyridyl, pyrimidinyl, pyrimidyl, pyridenyl, pyrrolidinyl, pyrrolinyl, pyrroyl, quinolizinyl, quinocyclidinyl, quinolyl, thiazolyl, triazolyl and triazyl groups.