Use of polyamidoamines as curing agents for epoxy resins and curable mixtures containing these substances wherein the acid component has oxyalkylene(repeating)units

US5017675A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Manfred Marten · Mainz, DE
• Claus Godau · Kiedrich, DE
• Heinz Schmelzer

Key dates

• Filing date: Jan 16, 1990
• Grant date: May 21, 1991
• Expiry date: Jan 16, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L79/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Use of polyamidoamines as curing agents for epoxy resins and curable mixtures containing these substances. The invention relates to the use of polyamidoamines (A) containing primary and/or secondary amino groups as curing agents for epoxy-containing compounds (B), wherein the polyamidoamines (A) used are those compounds which have been obtained by polycondensation of (a) compounds from the group of dicarboxylic acids containing oxyalkylene groups, or derivatives thereof (esters), with (b) polyamines containing at least two amino groups which are condensable with (a). The invention furthermore relates to curable mixtures containing the abovementioned components (A) and (B). The cured products obtainable according to the invention have advantages with regard to impact strength and shock resistance, to flexibility even at relatively low temperatures and crack-bridging properties.