Company News, Patents

3M Patents Surfactant-Free Topical Insect Repellent

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By: TOM BRANNA

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US Patent No. 8,114,386 B2; 3M Innovative Properties Company, St. Paul, MN, has patented a single phase, surfactant-free, topical insect repellent composition. It is comprised of an effective amount of one or more film-forming methyl vinyl ether-maleic acid monobutyl or monoethyl ester copolymers comprising neutralized carboxylic acid groups; an effective amount of one or more insect repellents selected from the group consisting of sec-butyl 2-(2-hydroxyethyl)piperidine-1-carboxylate, ethyl N-bu...

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