OPTICAL BRIGHTENER AND METHOD OF PREPARING IT - Patent 1694759

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EP 1 694 759 A1

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(43)	Date of publication:
	30.08.2006 Bulletin 2006/35

(21)	Application number: 04813296.3

(22)	Date of filing: 08.12.2004

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International Patent Classification (IPC):

C08K 5/00^(2006.01)
C08L 29/04^(2006.01)
D21H 19/00^(2006.01)

C08L 29/00^(2006.01)
D21H 17/00^(2006.01)
D21H 21/00^(2006.01)

(86)	International application number:
	PCT/US2004/040963

(87)	International publication number:
	WO 2005/056658 (23.06.2005 Gazette 2005/25)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

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Priority:

09.12.2003 US 731495
16.06.2004 US 869120

(71)	Applicant: Celanese International Corporation
	Dallas, Texas 75234 (US)

(72)	Inventors:
	MILLER, Gerald, D. Humble, TX 77346 (US) MITCHELL, Craig, E. Highland Village, TX 75077-1819 (US)

(74)	Representative: Kirsch, Susan Edith et al
	Carpmaels & Ransford 43-45 Bloomsbury Square LONDON WC1A 2RA LONDON WC1A 2RA (GB)

(54)	OPTICAL BRIGHTENER AND METHOD OF PREPARING IT