3m Innovative Properties Company

Michael S Newman

Lianzhou Chen

Jung-Sheng Wu

A multi-tool device is disclosed including a separable hinge architecture and an open-ended wrench mechanism. The open-ended wrench mechanism including a frame member with integrated or separate outer jaw, and a sliding and rotating inner jaw, and a spring to bias the jaws closed. Various means to arrest the motion on the stroke are presented. The hinge embodies two parallel rotational joints through positive or negative orifice allowing mechanical fastening of two multi-tool modules to be paired and locked rotationally through common means in selectable positions.

Multi-tool device

Provided are aqueous primer compositions and methods that can be useful for protecting primary structures on an aircraft. The primer composition can contain a thermosetting resin dispersion in water, a coalescent solvent in which the thermosetting resin is at least partially soluble, a first curative that is substantially water-insoluble, and a second curative that is substantially water-soluble. Optionally, the primer composition further contains an epoxy silane, where the primer composition is substantially free of any liquid or water-soluble curatives containing a primary or secondary amine group.

Aqueous primer composition and related methods

Provided are curable compositions including a base part comprising an amine-reactive curable resin and a curative part comprising a polymeric toughener dissolved in an amine. The polymeric toughener, optionally a rubbery polymer or thermoplastic polymer, is solid at ambient conditions with a weight average molecular weight of at least 5,000 g/mol while the amine is a liquid at ambient conditions. The curable composition is cured by mixing the base and curative parts with each other. Hardened compositions obtained thereof can achieve increased toughener loading, resulting in high peel and shear strength performance over a wide range of temperatures, including at temperatures exceeding 180&#xb0; F. (82&#xb0; C.).

Growing community of inventors

Woodbury, MN, United States of America

Michael S Newman