Patent · US Expired

Substituted urea accelerator with dicyandiamide for epoxy resin systems

US7750107B2 · kind B2 · utility

7Cited by

1References

7Claims

0Family size

Assignee

Alzchem Trostberg GmbH · DE

Inventors

Bjorn Antelmann · Celle, DE
Sylvia Huber · Zwingenberg, DE
Thomas Güthner · Trostberg, DE

Key dates

Filing date	May 28, 2004
Grant date	Jul 6, 2010
Priority date	—
Expiry date	Aug 3, 2025

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G59/4021
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A description is given of the use of asymmetrically substituted urea derivatives of the general formula (I)where R1 and R2 each independently are a linear or branched aliphatic hydrocarbon radical having 1 to 4 carbon atoms as accelerators in combination with dicyandiamide as latent hardener for epoxy resin systems based on unhalogenated or halogenated bisphenols of type A or F and also based on resorcinol or tetrakisphenylolethane. The advantages of the inventively proposed accelerator/hardener combination are, for example, the excellent reactivity and very good storage stability. Moreover, the mechanical properties of the resins cured accordingly are likewise outstanding.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.