Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use

US5578678A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinrich Hartmann · Schifferstadt, DE
• Walter Denzinger · Speyer, DE
• Michael Kroener · Mannheim, DE
• Claudia Nilz · Rödersheim-Gronau, DE
• Friedrich Linhart · Heidelberg, DE
• Andreas Stange · Mannheim, DE

Key dates

• Filing date: Apr 19, 1994
• Grant date: Nov 26, 1996
• Expiry date: Apr 19, 2014

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 of PA1 (a) from 10 to 100% by weight of open-chain N-vinylcarboxamides PA1 (b) from 0 to 90% by weight of other, carboxyl-free monoethylenically unsaturated monomers which are copolymerizable with the monomers (a) and PA1 (c) from 0 to 5% by weight of monomers containing two or more ethylenically unsaturated, non-conjugated double bonds in the molecule, in the presence of PA0 (B) natural substances containing saccharide structures, such as mono-, oligo- and polysaccharides, in a weight ratio (A):(B) of from 95:5 to 20:80 and, if required, subsequent hydrolysis of the amido groups of the polymerized monomers (a) of the graft polymer with formation of amino groups, and said polymers are used as dry and wet strength agents for paper, board and cardboard.