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Title:
USE OF HYDROLYSED POLYMERS OF N-VINYL CARBOXYLIC ACID AMIDES AS AGENTS FOR INCREASING THE DRY STRENGTH OF PAPER, CARD AND CARDBOARD
Document Type and Number:
WIPO Patent Application WO1997031518
Kind Code:
A3
Abstract:
Proposed is the use, as agents for increasing the dry strength of paper, card and cardboard, of partially hydrolysed polymers of N-vinyl carboxylic acid amides obtained by the homopolymerization of N-vinyl carboxylic acid amides of the formula (I) in which R<1> and R<2> are H or C1-C6 alkyl and by splitting off 0.5 to 95 mole % of the groups of the formula (II) in which R<1> is H or C1-C6 alkyl.

Inventors:
NIESSNER MANFRED (DE)
NILZ CLAUDIA (DE)
UTECHT JENS (DE)
RUEBENACKER MARTIN (DE)
SCHUHMACHER RUDOLF (DE)
Application Number:
EP9700801W
Publication Date:
September 26, 2002
Filing Date:
February 20, 1997
Export Citation:
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Assignee:
BASF AKTIENGESELLSCHAFT
NIESSNER, MANFRED
NILZ, CLAUDIA
UTECHT, JENS
RUEBENACKER, MARTIN
SCHUHMACHER, RUDOLF
International Classes:
C08F8/12; C08F26/02; D21H17/34; D21H21/18; D21H17/37; (IPC1-7): D21H21/18
Domestic Patent References:
WO1994013882A11994-06-23
Foreign References:
DE4411311A11995-10-05
EP0331047A11989-09-06
EP0262577A21988-04-06
US2721140A1955-10-18
EP0216387A21987-04-01
US4421602A1983-12-20
EP0251182B11991-11-27
DE2741753B11979-03-22
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