N-alkylimide copolymers and their use as sizing agents

US4596863A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gunter Sackmann · Leverkusen, DE
• Ulrich Beck · Bornheim, DE
• Heinz Baumgen · Leverkusen, DE

Key dates

• Filing date: May 4, 1984
• Grant date: Jun 24, 1986
• Expiry date: May 4, 2004

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/43
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to new copolymers based on maleic anhydride/.alpha.,.beta.-unsaturated compounds and characterized in that they consist of PA0 (A) 10 to 40 mol percent of the structural element ##STR1## (B) 40 to 80 mol percent of the structural element ##STR2## and (C) 10 to 50 mol percent of the structural element ##STR3## where the total of mol percentages of (A), (B) and (C) is 100 and where PA0 R.sub.1 =hydrogen or alkyl, PA0 R.sub.2 =hydrogen, alkyl or optionally substituted aryl, PA0 R.sub.3 =a hydrocarbon radical having 10 to 22 C atoms, PA0 R.sub.4 =a hydrocarbon radical having 10 to 22 C atoms, and PA0 X=an oxygen atom or an NR.sub.5 group where R.sub.5 represents a hydrocarbon radical having 1 to 18 C atoms. The copolymers in question are excellent active ingredients for sizing agents for paper and are suitable not only for pulp-sizing but also for surface-sizing.