Hydrophilic-core microcapsules and their formation

US9227221B2 · kind B2 · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• Luz M. Calle · Merritt Island, US
• Wenyan Li · Orlando, US
• Jerry W. Buhrow · Viera, US
• Scott T. Jolley · Mentor, US

Key dates

• Filing date: Aug 16, 2010
• Grant date: Jan 5, 2016
• Expiry date: Jun 29, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K9/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Hydrophilic-core microcapsules and methods of their formation are provided. A hydrophilic-core microcapsule may include a shell that encapsulates water with the core substance dissolved or dispersed therein. The hydrophilic-core microcapsules may be formed from an emulsion having hydrophilic-phase droplets dispersed in a hydrophobic phase, with shell-forming compound contained in the hydrophilic phase or the hydrophobic phase and the core substance contained in the hydrophilic phase. The shells of the microcapsules may be capable of being broken down in response to being contacted by an alkali, e.g., produced during corrosion, contacting the shell.