Latently crosslinking aqueous dispersions containing a polyurethane

US6767954B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Bernd Meyer-Roscher · Neustadt, DE
• Andre Burghardt · Frankenthal (Pfalz), DE
• Ulrike Licht · Mannheim, DE

Key dates

• Filing date: Apr 2, 2002
• Grant date: Jul 27, 2004
• Expiry date: Oct 19, 2022

Classification

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

Abstract

Latently crosslinking aqueous polyurethane dispersions containI) a disperse phase (P.I) containingIa) a polyurethane (Ia) which, in addition to hydrophilic groups which produce water dispersibility, carries carbodiimide groups and substantially no carboxyl groups orIb) a physical mixture ofIbi) a polyurethane (Ibi) which carries hydrophilic groups which produce water dispersibility and carries substantially no carbodiimide or carboxyl groups, andIbii) a carbodiimide (Ibii) which carries substantially no hydrophilic groups which produce water dispersibility, andII) a disperse phase (P.II) containing another polymer (II) which carries substantially no carbodiimide groups and is substantially derived fromII.1) from 30 to 99.98% by weight of main monomers selected from C1- to C20-alkyl (meth)acrylates, vinyl esters of carboxylic acids of up to 20 carbon atoms, vinylaromatics of up to 20 carbon atoms, ethylenically unsaturated nitriles, vinyl halides and aliphatic hydrocarbons having 2 to 8 carbon atoms and 1 or 2 double bonds,II.2) from 0.01 to 20% by weight of a carboxylic acid having an olefinic double bond andII.3) from 0.01 to 10% by weight of a monomer differing from the monomers …