Production of melamine-formaldehyde foams

US11254795B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Johann Martin Szeifert · Mannheim, DE
• Bernhard Vath · Mannheim, DE
• Tobias Heinz Steinke · Speyer, DE
• Bettina Wester · Frankenthal (Pfalz), DE
• Cecile Schneider · Bischofswerda, DE
• Sebastian Alexander Weisse · Ludwigshafen am Rhein, DE
• Peter Wolf · Gaithersburg, US
• Werner Lenz · Bad Dürkheim, DE
• Axel Kirste · Ludwigshafen am Rhein, DE
• David John Pung · Loveland, US
• Megan Showell Roberts · Overland Park, US

Key dates

• Filing date: Nov 14, 2017
• Grant date: Feb 22, 2022
• Expiry date: Dec 20, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2471/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for producing a melamine-formaldehyde foam by heating and foaming an aqueous mixture M using microwave radiation, said mixture M comprising at least one melamine-formal-dehyde precondensate, at least one curative, at least one surfactant, at least one blowing agent and at least one linear polymer with a number average molecular weight Mn in the range from 500 to 10,000 g/mol and at least two functional groups selected from OH, NH2 or COOH as well as a melamine-formaldehyde foam obtainable by this process and its use.