Process of preparing polyamine-epihalohydrin resins with reduced byproduct content

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(11)

EP 1 770 109 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A2)

(48)	Corrigendum issued on:
	25.07.2007 Bulletin 2007/30

(43)	Date of publication:
	04.04.2007 Bulletin 2007/14

(21)	Application number: 07000112.8

(22)	Date of filing: 12.06.2000

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International Patent Classification (IPC):

C08G 73/02^(2006.01)
D21H 17/56^(2006.01)
D21H 27/08^(2006.01)

D21H 17/55^(2006.01)
D21H 27/10^(2006.01)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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Priority:

11.06.1999 US 330200
30.07.1999 US 363224

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	00939450.3 / 1189972

(71)	Applicant: HERCULES INCORPORATED
	Wilmington, Delaware 19894-0001 (US)

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Inventors:

Allen, Anthony J.
Wilmington, DE 19808 (US)
Hoglen, John, James
Newark, DE 19711 (US)
Busink, Ronald
6721 RL Bennekom (NL)
Cheng, Huai, Nan
Wilmington, DE 19803-1606 (US)
Haandrikman, Alfred, Jacques
3823 WZ Amersfoort (NL)
Carlin, Francis, J.,Jr.
Newark, DE 19711 (US)
Hofbauer, Michaela
4708 CC Roosendaal (NL)
Crisp, Mark, T.
3816 HH Amersfoort (NL)
Lapre, John, Arthur
6715 HB Ede (NL)
Jabloner, Harold
Landenburg, PA 19350 (US)
Riehle, Richard, James
Wilmington, DE 19807 (US)

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


	Remarks:
	This application was filed on 04 - 01 - 2007 as a divisional application to the application mentioned under INID code 62.

(54)	Process of preparing polyamine-epihalohydrin resins with reduced byproduct content

(57) A process for rendering a polyamine-epihalohydrin resin storable stable, comprising: treating a composition containing a polyamine-epihalohydrin resin which includes CPD-forming species with at least one acidic agent, wherein the pH during treatment is about 1.1 or less; the time is for at least about 2 hours to at least about 24 hours, and the temperature is at least about 30 °C to at least about 90 °C, wherein the temperature range is combined with the time period range in an inverse relationship, to at least one of inhibit, reduce and remove the CPD-forming species to obtain a gelation storage stable reduced CPD-forming resin so that the composition containing the reduced CPD-forming polyamine-epihalohydrin resin, when stored at pH 1 for 24 hours at 50 °C and measured at 24 hours, produces less than about 500 ppm dry basis of CPD.