Graft polymers of polymers containing vinyl ester and/or vinyl alcohol units and ethylenically unsaturated compounds, their preparation and their use

US6060566A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Denzinger · Speyer, DE
• Martin Rubenacker · Altrip, DE
• Claudia Nilz · Rödersheim-Gronau, DE
• Primoz Lorencak · Ludwigshafen, DE
• Dietmar Monch · Weinheim, DE
• Rudolf Schuhmacher · Böhl-Iggelheim, DE
• Andreas Stange · Mannheim, DE

Key dates

• Filing date: Jan 21, 1998
• Grant date: May 9, 2000
• Expiry date: Jan 21, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/18
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Graft polymers are obtainable by free radical polymerization of PA0 (A) monomers or monomer mixtures comprising PA1 (a) from 1 to 100% by weight of N-vinylcarboxamides of the formula ##STR1## where R.sup.1 and R.sup.2 are each H or C.sub.1 -C.sub.6 -alkyl, (b) from 0 to 99% by weight of other monoethylenically unsaturated monomers copolymerizable with the monomers (a) and PA1 (c) from 0 to 5% by weight of monomers having at least two ethylenically unsaturated, nonconjugated double bonds in the molecule, in the presence of PA0 (B) polymers which contain units of vinyl esters of saturated C.sub.1 -C.sub.4 -carboxylic acids and/or vinyl alcohol units, or of mixtures which contain these polymers and polymers having at least 3 alkylene oxide units or polytetrahydrofuran, in a weight ratio (A):(B) of from 95:5 to 10:90 and, if required, subsequent elimination of the group ##STR2## from the polymerized monomers (I) of the graft polymer with formation of units of the formula ##STR3## and the graft polymers described above are used in the production of paper, board and cardboard as dry and wet strength agents, as retention and drainage aids and as promoters in diketene sizing and as starch …