Tub sizes for paper

US4771097A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gunter Sackmann · Leverkusen, DE
• Ulrich Beck · Bornheim, DE
• Joachim Konig
• Heinz Baumgen · Leverkusen, DE
• Klaus Albrecht · Mainz, DE

Key dates

• Filing date: Mar 16, 1987
• Grant date: Sep 13, 1988
• Expiry date: Mar 16, 2007

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/16
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Tub sizes for paper, containing aqueous or aqueous-alcoholic alkali metal, amine or ammonium salt solutions of copolymers of maleic anhydride and diisobutylene and, if appropriate, a vinyl monomer of the formula ##STR1## in which R designates H, --CH.sub.3, --C.sub.2 H.sub.5, --OR.sub.2, --OCOCH.sub.3, ##STR2## --CH.sub.2 OH or --CH.sub.2 --O--COCH.sub.3, R.sub.1 designates H or --CH.sub.3 and PA1 R.sub.2 designates alkyl, the anhydride groups of the copolymers being bis-esterified to the extent of about 3 to about 20 mol %, relative to the anhydride groups, with aliphatic monoalcohols having 1 to 12 C atoms.