Polyester polyols from terephthalic acid and oligoalkylene oxides

US8334035B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Hartmut Nefzger · Pulheim, DE
• Erika Bauer · Höchst im Odenwald, DE
• Uwe Kuenzel · Leverkusen, DE
• Jürgen Schloβmacher · Bergheim, DE
• Lutz Brassat · Leverkusen, DE

Key dates

• Filing date: Mar 27, 2010
• Grant date: Dec 18, 2012
• Expiry date: Mar 27, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/139
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyester polyols are produced by reacting terephthalic acid with a glycol corresponding to the formula H—(OCH2CH2)n—OH and an aliphatic dicarboxylic acid. These polyester polyols are particularly useful for the production of polyurethane) (PUR) and polyurethane/polyisocyanurate (PUR/PIR) foams for use in insulation applications.