发明授权
- 专利标题： Photochromic naphthacenequinones, process for their preparation and the use thereof
- 专利标题（中）： 光致变色石墨烯，其制备方法及其用途
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申请号： US639463申请日： 1991-01-10
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公开(公告)号： US5177227A公开(公告)日： 1993-01-05
- 发明人: Walter Fischer , Evelyn Fischer , Ernst Minder , Manfred Hofmann , Jurgen Finter , Heinz Spahni
- 申请人： Walter Fischer , Evelyn Fischer , Ernst Minder , Manfred Hofmann , Jurgen Finter , Heinz Spahni
- 申请人地址： NY Ardsley
- 专利权人： Ciba-Geigy Corporation
- 当前专利权人： Ciba-Geigy Corporation
- 当前专利权人地址： NY Ardsley
- 优先权： CHX161/90 19900118
- 主分类号： C07C46/00
- IPC分类号： C07C46/00 ; C07C50/22 ; C07C50/24 ; C07C69/95 ; C07C317/24 ; C07C323/22 ; C07C323/62 ; C09K9/02 ; G03C1/73 ; G11B7/24 ; G11B7/244
摘要：
Compounds of formula I or V, or mixtures thereof, ##STR1## wherein R is unsubstituted C.sub.6 -C.sub.14 aryl or C.sub.6 -C.sub.14 aryl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthiol, phenyl, benzyl, --CN,--CF.sub.3, halogen or --COOR.sub.5, and R.sub.5 is H, C.sub.1 -C.sub.18 alkyl, cyclohexyl, cyclopentyl, phenyl, C.sub.1 -C.sub.12 alkylphenyl, benzyl or C.sub.1 -C.sub.12 alkylbenzyl, and at least one of the substituents R.sub.1 to R.sub.4 is an organic thiol, sulfoxyl or sulfonyl group, and the other members R.sub.1 to R.sub.4 are H, F, Cl or Br, are reversible photochromic systems which can be used for contrast formation or light absorption.
公开/授权文献
- US5709723A Method for producing large glass preforms 公开/授权日：1998-01-20