Polymers having terminal amino groups and use thereof as additives for zinc and zinc alloy electrodeposition baths

US9322107B2 · kind B2 · utility

Assignee

• Atotech Deutschland GmbH & Co. KG · DE

Inventors

• Heiko Brunner · Berlin, DE
• Lars Kohlmann · Berlin, DE
• Ellen Habig · Berlin, DE
• Björn Dingwerth · Berlin, DE
• Lukas Bedrnik · Tanvald, CZ

Key dates

• Filing date: Sep 3, 2010
• Grant date: Apr 26, 2016
• Expiry date: Jun 18, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D3/22
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Additives for electrolyte baths for the electrodeposition of zinc or zinc alloy layer are described. The additives are polymers with terminal amino groups. These polymers are obtainable by reaction of at least one diamino compound (having two tertiary amino groups) with at least one di(pseudo)halogen compound, wherein the diamino compound is used in stoichiometric excess. The additives effect, in particular, a very little formation of bubbles and only few burnings as well as a uniform distribution of layer thickness in the electrodeposition of zinc or zinc alloy layers.