Respirator, welding helmet, or face shield that has low surface energy hard-coat lens

US8015970B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Thomas P. Klun · Lakeland, US
• Zai-Ming Qiu · Woodbury, US
• Gerald R. Hofmann · Burlington, US
• Andrew S. Viner · Roseville, US
• Oscar S. Benz · Pittsburgh, US
• Suresh S. Iyer · Woodbury, US
• Gregory D. Clark · Windom, US
• Craig Burton · Newark, US
• Mark J. Pellerite · Woodbury, US

Key dates

• Filing date: Jul 26, 2007
• Grant date: Sep 13, 2011
• Expiry date: Jun 20, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/041
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A personal safety protective device that includes a lens and a support structure onto which the lens is secured. The lens includes a substrate and a hard-coat layer located on the substrate of the lens. The hard-coat layer has a low surface energy outer surface that is derived from a) an additive that includes at least one of i) a perfluoropolyether urethane that includes hydrolysable silane groups, and ii) an acrylate polymer that includes at least one perfluoropolyether moiety and at least one hydrolysable silane group, and b) a silsesquioxane-based hard-coat composition. The provision of such a lens on a personal safety protective device enables the lens to be durable to abrasion and to be easily cleaned without use of solvents that could shorten the service life of the lens.