Foam material on the basis of phenolic resin

US9464152B2 · kind B2 · utility

Assignee

• HEXION INC. · US

Inventors

• Daniel Dahlhaus · Heiden, DE
• Gunda Kuhlmann · Hamm, DE
• Rosel Bölke · Herdecke, DE

Key dates

• Filing date: Nov 14, 2012
• Grant date: Oct 11, 2016
• Expiry date: Dec 2, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2361/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is a method of preparing a bio-based thermosetting foam material with improved properties, in particular improved flame retardant properties, which method includes the steps of a) producing a prepolymer by condensation of at least one phenolic compound and formaldehyde in a ratio of 1:1.0 to 3.0 using 0.15 to 5 wt % of an alkaline catalyst in the temperature range of 50 to 100° C. until the refractive index of the reaction mixture is 1.4990 to 1.5020, b) adding 2 to 40 wt % of at least one natural polyphenol at a temperature of 50 to 100° C., c) adding 2 to 10 wt % of one or more emulsifiers and mixtures thereof, d) adding 2 to 10 wt % of one or more foaming agents and mixtures thereof and e) adding 10 to 20 wt % of a curing agent and f) curing. All wt % being related to the amount of the raw materials used.