Composition of epoxy resin, low glass transition temperature copolymer, latent hardener and carboxy-terminated polyamide and/or polyamide

US6884854B2 · kind B2 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Rainer Schoenfeld · Goldkronach, DE
• Hubert Schenkel · Sandhausen, DE
• Harald Kuester · Goldkronach, DE

Key dates

• Filing date: Mar 31, 2001
• Grant date: Apr 26, 2005
• Expiry date: Nov 14, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2463/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Condensation products prepared from cyclic carboxylic anhydrides of dicarboxylic acids, tricarboxylic anhydrides or tetracarboxylic anhydrides and difunctional polyamines, in particular polyoxyalkyleneamines, are suitable as a builder component for epoxy resin compositions. The reaction products based on tricarboxylic anhydrides or tetracarboxylic anhydrides are distinguished by having on average more than one imide group and carboxyl group per molecule. The compositions may optionally also contain condensation products obtained from tri- or poly-functional polyols and/or tri- or poly-functional amino-terminated polymers and cyclic carboxylic anhydrides, wherein the latter reaction products contain on average more than one carboxyl group per molecule. These compositions additionally contain conventional rubber-modified epoxy resins together with liquid and/or solid polyepoxy resins and conventional hardeners and accelerators and optionally fillers and rheology auxiliaries. Such compositions are particularly suitable as impact-resistant, impact/peel-resistant and peel-resistant adhesives in vehicle construction and in electronics. Particularly at very low temperatures, these adhesiv…