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NAPHTHOPYRANS ANNELATED IN C5-C6 WITH AN INDENE-OR DIHYDRONAPHTHALENE-TYPE RING AND COMPOSITIONS AND MATRICES CONTAINING THEM
NAPHTHOPYRANS ANNELATED IN C5-C6 WITH AN INDENE-OR DIHYDRONAPHTHALENE-TYPE RING AND COMPOSITIONS AND MATRICES CONTAINING THEM
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机译:在C5-C6上与茚基或二氢萘基环相连的萘并含有它们的成分和材料
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摘要
The present invention relates to novel naphthopyran-type compounds, annelated in position C5-C6 by an indene- or dihydronaphthalene-type carbocycle, which are of the formulae (I) and (II) given below:These compounds (I) and (II) have interesting photochromic properties. The invention also relates to their preparation, to their applications as photochromes, as well as to the compositions and (co)polymer matrices containing them.
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