Curing of epoxy resin compositions comprising cyclic carbonates using mixtures of amino hardeners

US8586653B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rainer Klopsch · Worms, DE
• Miran Yu · Worms, DE

Key dates

• Filing date: Sep 13, 2012
• Grant date: Nov 19, 2013
• Expiry date: Sep 13, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/56
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for curing an epoxy resin composition containing an epoxy resin and a compound of the general formula I:where R1 and R2 independently are hydrogen, C1-C6-alkyl, C1-C4-alkoxy-C1-C4-alkyl, C5-C6-cycloalkyl, phenyl, phenyl-C1-C4-alkyl, C2-C6-alkenyl or C2-C6-alkynyl, or R1 and R2 together are a C3-C11-alkylene group; and where R3 and R4 independently are hydrogen, C1-C6-alkyl, C1-C4-alkoxy-C1-C4-alkyl, C5-C6-cycloalkyl, phenyl, phenyl-C1-C4-alkyl, C2-C6-alkenyl or C2-C6-alkynyl, or R3 and R4 together are a C4-C6-alkylene group. The process includes adding amino hardeners, where 0.1% to 50% by weight of the amino hardeners are aliphatic, cycloaliphatic or aromatic amine compounds having 1 to 4 primary amino groups and optionally further functional groups, selected from secondary amino groups, tertiary amino groups, and hydroxyl groups. In the case of the cycloaliphatic and aromatic amine compounds, the primary amino groups are attached as aminomethylene groups (H2N—CH2—) to the cycloaliphatic or aromatic ring system (referred to below for short as co-hardeners).