2,2′-MDI-based isocyanate mixtures, polyisocyanate polyaddition products prepared therefrom, processes for making the same and methods for their use

US8097675B2 · kind B2 · utility

Assignees

• Bayer MaterialScience AG · DE
• Polytex Sportbeläge Produktions-GmbH · DE

Inventors

• Zdenka FINDER · Rohrenfels, DE
• Jens Krause · Rahden, DE
• Friedhelm Faehling · Duisburg, DE
• Manfred Schmidt · Krefeld, DE
• Dirk Wegener · Bielefeld, DE

Key dates

• Filing date: Mar 26, 2009
• Grant date: Jan 17, 2012
• Expiry date: Jan 30, 2030

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06N7/0071
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Isocyanate mixtures comprising: (a) NCO prepolymers having an NCO content of 1.5 to 18 wt. %; and (b) 1 to 40 wt. % of monomeric 2,2′-diisocyanatodiphenylmethane, based on the isocyanate mixture; wherein the isocyanate mixture has a total NCO content of from 2 to 22 wt. %; polyisocyanate polyaddition products prepared therefrom; and methods of making the same.