Compositions – Fluent dielectric – O-containing
Patent
1997-12-10
1999-03-09
McPherson, John A.
Compositions
Fluent dielectric
O-containing
359642, 1062872, 549389, 549404, 549 48, 549 58, 549 60, 549366, 546165, 546176, 546196, 5462827, 548444, 548454, C08K 515, C07D31192, C07D31104, G02B 523
Patent
active
058795928
ABSTRACT:
Described are novel water soluble photochromic naphthopyran and benzopyran compounds having an alkylaminoalkylamino group on the naphtho- or benzo-portions and/or pyran portions thereof. These compounds may be represented by one of the following graphic formulae: ##STR1## wherein R.sub.1 is an alkylaminoalkylamino group. Articles such as ophthalmic lenses or other plastic transparencies and coating compositions such as paints and inks that incorporate the novel water soluble compounds are also described.
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Mallak Frank P.
McPherson John A.
PPG Industries Inc.
Stein Irwin M.
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