Hydrolyzed polymers of N-vinylcarboxamides as paper, paperboard and cardboard dry strength enhancers

US6159340A · kind A · utility

Assignee

• BASF SE

Inventors

• Manfred Niessner · Schifferstadt, DE
• Claudia Nilz · Rödersheim-Gronau, DE
• Jens Utecht · Neulußheim, DE
• Martin Rubenacker · Altrip, DE
• Rudolf Schuhmacher · Böhl-Iggelheim, DE

Key dates

• Filing date: Aug 31, 1998
• Grant date: Dec 12, 2000
• Expiry date: Aug 31, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/37
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Partially hydrolyzed polymers of N-vinylcarboxamides obtainable by sole polymerization of N-vinylcarboxamides of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or C.sub.1 - to C.sub.6 -alkyl, and elimination from the polymers of from 0.5 to 95 mol % of the groups of the formula ##STR2## where R.sup.1 is hydrogen or C.sub.1 - to C.sub.6 -alkyl, can be used as paper, paperboard and cardboard dry strength enhancers.