PHOTOCHROMIC COMPOUNDS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN POLYMERIC MATERIALS - Patent 1084208

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EP 1 084 208 A1

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(43)	Date of publication:
	21.03.2001 Bulletin 2001/12

(21)	Application number: 99924854.5

(22)	Date of filing: 03.05.1999

(51)	International Patent Classification (IPC)⁷: C09K 9/02, C07D 498/20, G03C 1/685

(86)	International application number:
	PCT/EP9902/952

(87)	International publication number:
	WO 9957/219 (11.11.1999 Gazette 1999/45)

(84)	Designated Contracting States:
	DE FR GB

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Priority:

07.05.1998 IT MI980991

(71)	Applicant: Great Lakes Chemical (Europe) GmbH
	8500 Frauenfeld (CH)

(72)	Inventors:
	MALATESTA, Vincenzo I-20090 San Maurizio al Lambro (IT) SALEMI-DELVAUX, Christiane F-13008 Marseille (FR) DENIEL, Marie-Hélène F-47140 Penne d'Agenais (FR)

(74)	Representative: De Gregori, Antonella et al
	Ing. Barzano & Zanardo Milano S.p.A.Via Borgonuovo 10 20121 Milano 20121 Milano (IT)

(54)	PHOTOCHROMIC COMPOUNDS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN POLYMERIC MATERIALS