3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Craig A Burton

Thomas P Klun

Suresh Iyer

Oscar S Benz

Zai-Ming Qiu

Mark J Pellerite

Andrew S Viner

Randall H Helland

Gregory D Clark

Gerald R Hofmann

Gerald RA Hofmann

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.

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

Fluorochemical urethane compounds and coating compositions derived therefrom are described. The compounds and compositions may be used in treating substrates, in particular substrates having a hard surface such as ceramics or glass, to render them water, oil, stain, and soil repellent.

Fluorochemical urethane compounds having pendent silyl groups

A flowable, dry powder of particles of a developing composition are provided. The compositions may be either heat- or pressure-fixable and utilize from about 0.4 to 10 parts by weight of fluorinated carbon per 100 parts by weight of a thermoplastic binder and a magnetically responsive material. The fluorinated carbon has a degree of fluorination in the range of 10% to 100% and an average diameter below about 2 microns. The developing powder compositions possess improved flow humidity resistance and provide dramatically improved copy quality.

Fluorinated carbon-containing developer composition

Growing community of inventors

Woodbury, MN, United States of America

Craig A Burton