Antifouling method and composition using chromen-4-one derivatives

US8557331B2 · kind B2 · utility

Assignee

• The Hong Kong University of Science and Technology

Inventors

• Peiyuan Qian · Hong Kong, CN
• Xiaojian Zhou · Kunming, CN
• Hongping He · Hong Kong, CN
• Ying-Zi Xu · South San Francisco, US

Key dates

• Filing date: Mar 20, 2009
• Grant date: Oct 15, 2013
• Expiry date: Mar 6, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N43/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method to utilize a chemical genus of chromen-4-one derivatives as non-toxic, environment friendly antifouling agent, a coating material for objects submerged under the water and subject to biofouling based on the chromen-4-one compounds, as well as a method of obtaining one of such chromen-4-one antifouling compounds, 4′,5,7-trihydroxy-isoflavone, from a natural source. Particularly exemplary of such substituted chromen-4-one antifouling compounds are provided and they are 4′,5,7 -trihydroxy-isoflavone, 4′,5-dihydroxy-3,6,7,8 tetramethoxy-flavone, 3′,5-dihydroxy-3,4′,6,8 tetramethoxy-flavone, 4′,5-dihydroxy-3,6,7-trimethoxy-flavone, 4′,5,7-trihydroxy-flavone, 3′,4′,6,7-tetrahydroxy-flavone, and 5-monohydroxy-flavone.