Filler-modified polyurethane foam supports for bioconversion processes

US5366999A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Edmund Giez · Leichlingen, DE
• Imre Pascik · Monheim, DE
• Joachim Priemer · Odenthal, DE

Key dates

• Filing date: Jul 9, 1993
• Grant date: Nov 22, 1994
• Expiry date: Jul 9, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/10
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A polyurethane foam web with a thickness of 5 mm to 30 mm is passed continuously through a dipping bath and is thereby impregnated with 10% to 1000% by weight of a polymer dispersion consisting of the components A) and B) defined below: PA1 A) 30% to 65% by weight, preferably 40% to 60% by weight and particularly preferably 45% to 50% by weight of a cationic styrene/butadiene copolymer latex containing about 50% of dry substance, or of an anionic butadiene/acrylonitrile copolymer latex, and PA1 B) 10% to 50% by weight, preferably 15% to 40% by weight and particularly preferably 25% to 35% by weight of an inorganic and/or organic pulverulent filler, and the foam web treated in this way is compressed to remove excess liquid and then dried in a drying oven at temperatures of 80.degree. C. to 120.degree. C.