One-component polyurethane compositions with improved curing

US6414045B1 · kind B1 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Franz Heimpel · Affing, DE
• Silvia Huber · Alzenau, DE
• Peter Vogel · Diepersdorf, DE

Key dates

• Filing date: Jun 8, 2000
• Grant date: Jul 2, 2002
• Expiry date: Jun 8, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A one-component polyurethane foam composition is described, which contains at least one prepolymer (isocyanate prepolymer), which has isocyanate groups, at least one blowing agent and known auxiliary and additive materials containing at least one ester, free of reactive hydrogens, of a polycarboxylic C2 to C7 acid and a monohydric C1 to C7 alcohol and/or a monocarboxylic C1 to C7 acid with a multihydric C2 to C7 alcohol as means for improving the complete and embrittlement-free curing even at low temperatures and/or low ambient humidities, as well as the use of these esters, which are free of reactive hydrogen atoms, for improving the embrittlement-free curing of such one-component polyurethane foam compositions under unfavorable conditions (low temperature and little available ambient humidity).