PROCESS TO ENHANCING DRY STRENGTH OF PAPER BY TREATMENT WITH VINYLAMINE-CONTAINING POLYMERS AND ACRYLAMIDE CONTAINING POLYMERS - Patent 2519692

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EP 2 519 692 A1

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(43)	Date of publication:
	07.11.2012 Bulletin 2012/45

(21)	Application number: 10799243.0

(22)	Date of filing: 22.12.2010

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International Patent Classification (IPC):

D21H 21/18^(2006.01)

(86)	International application number:
	PCT/US2010/061750

(87)	International publication number:
	WO 2011/090672 (28.07.2011 Gazette 2011/30)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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Priority:

29.12.2009 US 290670 P

(71)	Applicant: Hercules Incorporated
	Wilmington, DE 19808 (US)

(72)	Inventors:
	BRUNGARDT, Clement, L. Oxford, PA 19363 (US) MCKAY, Jonathan, M. Wilmington, DE 19808 (US) RIEHLE, Richard, J. Wilmington, DE 19807 (US)

(74)	Representative: HOFFMANN EITLE
	Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)

(54)	PROCESS TO ENHANCING DRY STRENGTH OF PAPER BY TREATMENT WITH VINYLAMINE-CONTAINING POLYMERS AND ACRYLAMIDE CONTAINING POLYMERS