Water-dilutable binder agent composition

US6566444B1 · kind B1 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Armin Gobel · Syke, DE
• Hermann Schaffer · Wuppertal, DE
• Bettina Vogt-Birnbrich · Solingen, DE

Key dates

• Filing date: Sep 27, 2001
• Grant date: May 20, 2003
• Expiry date: Sep 27, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Water-dilutable binder composition containing one or more water-dilutable hydroxy-functional polyurethane urea paste resins having a urea group content (calculated as —NHCONH—) of from 10 to 300 mmol, a urethane group content (calculated as —NHCOO—) of from 20 to 300 mmol, in each case in 100 g of solid resin, an OH number of from 20 to 250, an acid number of from 15 to 80 and a molar mass Mn of from 1000 to 20,000, obtainable byI) preparing an NCO-group-containing polyurethane prepolymer by reactinga1) hydroxy-functional compounds having a molar mass (Mn) of from 360 to 8000 witha2) polyisocyanates anda3) compounds having at least one group that is able to react with isocyanates and at least one ionic group,II) subsequently reacting the polyurethane prepolymer witha4) hydroxy-functional monoamines and, optionally, polyols, andIII) neutralising groups that can be converted into ionic groups, and from 2.0 to 25 wt. %, based on the solids content of polyurethane urea resin, of one or more polyether polyols having a molar mass of from 400 to 5000.