Corrosion inhibiting pigment comprising nanoreservoirs of corrosion inhibitor

US9340676B2 · kind B2 · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Dmitry Shchukin · Berlin, DE
• Helmuth Möhwald · Bingen, DE
• Mario Ferreira · Lisbon, PT
• Mikhail Zheludkevich · Aveiro, PT

Key dates

• Filing date: Mar 7, 2007
• Grant date: May 17, 2016
• Expiry date: Aug 21, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K9/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A corrosion inhibiting pigment includes nanoscale reservoirs (nanoreservoirs) of corrosion inhibitor for active corrosion protection of metallic products and structures, wherein the nanoreservoirs include a polymer or polyelectrolyte shell which is sensitive to a specific trigger and capable of releasing the inhibitor after action of the trigger. An anti-corrosive coating with self-healing properties includes the pigment, methods for preparing the pigment, in particular by layer-by-layer deposition, as well as methods of use of the pigment.