Aminourethane hardeners, epoxide-based coating media and the use thereof

US6008314A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Wilfried Collong · Wermelskirchen, DE
• Werner Lenhard · Wuppertal, DE
• Robert Besold · Nürnberg, DE
• Uwe Neumann · Coburg, DE

Key dates

• Filing date: May 14, 1998
• Grant date: Dec 28, 1999
• Expiry date: May 14, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/184
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aminourethane hardeners, suitable for aqueous epoxide-based coating media, otainable by the reaction of PA1 A) aminourethanes which are obtainable by the reaction of PA2 a) compounds comprising at least one cyclic carbonate group, and PA2 b) amines comprising at least one primary amino group wherein the ratio of the number of carbonate groups to that of amino groups is 1:10 to 1:1.1, with PA1 B) water-thinnable epoxide compounds, obtainable from PA2 c) polyalkylene polyethers comprising a primary and/or secondary .alpha.-amino group and an .omega.-alkyl ether or aryl ether group and/or polyatkylene polyethers comprising two primary and/or secondary .alpha.,.omega.-amino groups, each with a weight average molecular weight of 200 to 20,000, with PA2 d) epoxide compounds comprising at least two epoxide groups per molecule and an equivalent weight of 100 to 2000, wherein the ratio of the number of amino groups of component c) to the epoxide groups of component d) is 1:2 to 1:20, and the epoxide equivalent weight of the condensation products obtained from c) and d) is between 150 and 8000.