Aqueous dispersions of hydrophilic polyurethane resins

US6677400B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Thomas Munzmay · Dormagen, DE
• Uwe Klippert · Burscheid, DE
• Frank Kobor · Shanghai, CN
• Claus Kobusch · Meerbusch, DE
• Gerald Kurek · Leverkusen, DE

Key dates

• Filing date: Aug 5, 2002
• Grant date: Jan 13, 2004
• Expiry date: Aug 5, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31573
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous polyurethane resin dispersions containingi) a polyol component with a molecular weight above 300 daltons, containing a polyether diol initiated on an aromatic diol,ii) a polyol component with a molecular weight of 62 to 299 daltons,iii) a monofunctional isocyanate-reactive compound with an ethylene oxide content of at least 50 wt. % and a molecular weight of at least 400 daltons,iv) a polyisocyanatev) an aliphatic polyamine with a molecular weight of 60 to 300 daltons or hydrazine, andvi) a hydrophilic aliphatic diamine,a process for making the dispersion and substrates primed with the dispersion.