Process for rigid polyurethane foams

US6339110B1 · kind B1 · utility

Assignee

• IMPERIAL CHEMICAL INDUSTRIES LIMITED · GB

Inventors

• Andrea Cappella · Trento, IT
• Werner Hoffmann · Ludwigshafen, DE
• Silvio Barettini · Varese, IT
• Maria Vittoria Franco · Borgomanero, IT
• Walter Bazzo · Varese, IT

Key dates

• Filing date: Jun 10, 1997
• Grant date: Jan 15, 2002
• Expiry date: Jun 10, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2115/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the preparation of a rigid polyurethane or urethane-modified polyisocyanurate foam in the presence of a hydrocarbon blowing agent using a tolylenediamine-initiated polyether polyol in an amount of between 10 and 40% by weight based on total isocyanate-reactive compounds.