3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Minneapolis Mining and Manufacturing Company

Robert J DeVoe

Katherine A Brown-Wensley

Gregg D Dahlke

Catherine A Leatherdale

Michael C Palazzotto

Jeffrey M Florczak

Patrick R Fleming

Brian J Gates

Eric G Larson

Craig R Sykora

Jerry W Williams

Craig A Masmar

Fred Boyle McCormick

Ernest L Thurber

Todd A Ballen

Bradford B Wright

Thomas M Clausen

Douglas Scott Dunn

George V Tiers

Naimul Karim

Ilya Gorodisher

Eric Wayne Nelson

Clayton Allen George

Alan R Kirk

Peggy S Willett

John E Potts

Guoping Mao

Don H Kincaid

Tzu-Chen Lee

Przemyslaw Pawel Markowicz

Robert T Krasa

Roy Stubbs

Dean Faklis

Mark R Meierotto

Moses Mekala David

Olester Benson, Jr

Ahmed Salih Abuelyaman

Wayne Scott Mahoney

James Gregory Bentsen

Todd R Williams

Richard B Ross

Jonathan E Janoski

Zeba Parkar

David Adrian Ylitalo

Walter L Harmer

John M Riedesel

Carla S Thomas

Kimberly K Harmon

Harvey Kalweit

Jennifer J Sahlin

Dora M Paolucci

Robert J Webb

Klaus Hintzer

Thomas P Klun

George W Griesgraber

Sumita Basu Mitra

William M Lamanna

Gary Timothy Boyd

Tatsuo Fukushi

Mario Alberto Perez

Guy D Joly

William J Schultz

Sheng Ye

Robin Edgar Wright

Ying-Yuh Lu

Allen Raymond Siedle

Dennis Edward Vogel

Dong-Wei Zhu

Pingfan Peter Wu

Michael D Swan

George F Vesley

Jeffrey L Solomon

Saswata Chakraborty

Brian Kenneth Nelson

David H Redinger

Omar Farooq

Barry S Carpenter

Travis L Potts

James Craig Novack

David S Arney

Feng Bai

Belma Erdogan-Haug

Ryan C Shirk

Patrick G Zimmerman

Robert A Follensbee

David A Kaisaki

Kevin E Kinzer

Xuan Jiang

Tho Q Nguyen

Andrew M Hine

Jeffrey N Bartow

Brook F Duerr

Robert D DeMaster

Fee Zentis

Jonathan P Kitchin

Michael L Teetzel

Jingwen Ma

Kundapur Raveesh Shenoy

Michael C Palazotto

Jeffrey M Olofson

The present disclosure provides a photopolymerizable composition. The photopolymerizable composition includes at least one urethane component, at least one monofunctional reactive diluent, an initiator, and optionally an inhibitor. The present disclosure also provides an article including the reaction product of the photopolymerizable composition. Further, the present disclosure provides a method of making an article. The method includes (i) providing a photopolymerizable composition and (ii) selectively curing the photopolymerizable composition to form an article. The method optionally also includes (iii) curing unpolymerized urethane component and/or reactive diluent remaining after step (ii). Further, methods are provided, including receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying an article; and generating, with the manufacturing device by an additive manufacturing process, the article based on the digital object. A system is also provided, including a display that displays a 3D model of an article; and one or more processors that, in response to the 3D model selected by a user, cause a 3D printer to create a physical object of an article.

Photopolymerizable compositions including a urethane component and a monofunctional reactive diluent, articles, and methods

Article comprising a first microstructured layer comprising a first material, and having first and second opposed major surfaces, the first major surface being a microstructured surface, and the microstructured surface having peaks and valleys, wherein the peaks are microstructural features each having a height defined by the distance between the peak of the respective microstructural feature and an adjacent valley; and a second layer comprising an adhesive material, and having a first and second opposed major surfaces, the adhesive material comprising a reaction product of a mixture comprising (meth)acrylate and epoxy in the presence of each other, wherein at least a portion of the second major surface of the second layer is directly attached to at least a portion of the first major microstructured surface of the first layer.

Article with microstructured layer

Described herein is a curable composition comprising an amorphous fluoropolymer having an iodine, bromine and/or nitrile cure site; a peroxide cure system comprising a peroxide and a Type II coagent; and a photoinitiator, wherein the curable composition is substantially free of a binder material. Also described herein, are methods of curing the curable composition using actinic radiation and articles thereof.

Fluorinated elastomers cured by actinic radiation and methods thereof

A semi-submersible microscope objective includes a microscope objective having a protective barrel with an optical inlet and optical outlet, and a protective element affixed to the microscope objective, sealing the optical exit but not the optical inlet. A transparent portion of the protective element is aligned with the optical exit. The protective element is separable from the microscope objective without damaging the microscope objective. Use of the semi-submersible microscope objective in a multiphoton imaging method is also disclosed.

Semi-submersible microscope objective with protective element and use of the same in multiphoton imaging method

A method of fabricating a structure includes disposing a liquid photoreactive composition on a substrate, exposing a portion of the liquid photoreactive composition to laser light of sufficient intensity and wavelength to cause polymerization via two-photon excitation of the two-photon sensitizer and polymerization of a portion of the liquid photoreactive composition thereby providing an exposed composition; and developing the exposed composition to provide the structure. The liquid composition includes: at least one cationically polymerizable polyepoxide; at least one compound comprising free-radically polymerizable groups; an effective amount of a two-photon photoinitiator system, wherein the weight ratio of component (a) to component (b) is from 25:75 to 75:25, inclusive. The two-photon photoinitiator system includes a two-photon sensitizer and an aromatic onium salt. The liquid photoreactive composition may contain less than about one percent by weight of organic solvent.

Liquid photoreactive composition and method of fabricating structures

Nozzle and a method of making the same are disclosed. The method includes (a) providing a microstructured mold pattern defining at least a portion of a mold and comprising a plurality of replica nozzle holes and replica planar control cavities; (b) molding a first material into a nozzle forming microstructured pattern using the microstructured mold pattern, with the nozzle forming microstructured pattern comprising a plurality of nozzle hole forming features and planar control cavity forming features; (c) forming a second material into a nozzle pre-form using the nozzle forming microstructured pattern, with the nozzle pre-form comprising a plurality of nozzle pre-form holes and sacrificial planar control cavities; and (d) forming a nozzle from the nozzle pre-form, said forming the nozzle comprising removing enough of the second material to remove the sacrificial planar control cavities so as to form a top surface of the nozzle pre-form into a planar top surface of the nozzle, and to form each of the nozzle pre-form holes into a nozzle through hole.

Microstructured pattern for forming a nozzle pre-form

Poly(benzoxazine) polymer are prepared by heating a benzoxazine compound in the presence of a (meth)acrylate copolymer having pendent tosylate groups, resulting in an interpenetrating polymer network of a poly(benzoxazine) and a crosslinked (meth)acrylate copolymer.

Benzoxazine polymerization

A semi-submersible microscope objective () includes a microscope objective having a protective barrel () with an optical inlet () and optical outlet (), and a protective element () affixed to the microscope objective, sealing the optical outlet () but not the optical inlet (). A transparent portion () of the protective element is aligned with the optical exit (). The protective element is separable from the microscope objective without damaging the microscope objective. Use of the semi-submersible microscope objective in a multiphoton imaging method is also disclosed.

A method of forming a working mold including placing a substrate near an electrode in a chamber, the substrate () having at least a first structured surface (); providing power to the electrode to create a plasma, &#x2014;introducing vapor of liquid silicone molecules into the plasma; and depositing a release layer (), the release layer () including a silicone containing polymer, the release layer () being deposited on at least a portion of the first structured surface of the substrate to form the working mold.

Methods of forming molds and methods of forming articles using said molds

A method of forming a working mold including: placing a substrate () on an electrode in a chamber, the substrate having at least a first structured surface () and the substrate including a thermoset polymeric material; introducing a release () layer forming gas into the chamber, wherein the release layer forming gas includes silicon containing gas and oxygen gas in an atomic ratio of not greater than about 200; providing power to the electrode to create a plasma of the release layer forming gas within the chamber; and depositing a release layer formed from the release layer forming gas on at least the first structured surface of the substrate to form a working mold.

Compositions such as photoresists and microfabrication processes are provided that can produce high-fidelity microfabricated structures. The provided photoresists can have reduced swelling during the development phase and can give tight tolerances for products, such as microneedles, that can be used, for example, in the medical field. The provided compositions include a photoresist, a photoinitiator system dispersed in the photoresist, and a polymer-tethered nanoparticle dispersed in the photoresist. The photoresist can be a negative photoresist and the photoinitiator system can include a two-photoinitiator system. The polymer-tethered nanoparticle can include an acrylic polymer and, in some embodiments, can include poly(methyl methacrylate). The nanoparticles can include silica.

Photoresists containing polymer-tethered nanoparticles

Novel benzoxazine-thiol adducts are described, which may be may be cured to produce compositions useful in coating, sealants, adhesive and many other applications.

Benzoxazine-thiol adducts

An exposure system includes a light source emitting a beam along an optical axis that is capable of inducing a multi-photon reaction in a resin. The exposure system further includes a resin undergoing multiphoton reaction, as well as an automated system including a monitor that measures at least one property of the beam selected from power, pulse length, shape, divergence, or position in a plane normal to the optical axis. The monitor generates at least one signal indicative of the property of the beam, and a sub-system adjusts the beam in response to the signal from the monitor.

Multi-photon exposure system

A method for building three-dimensional articles using a thermal polymerization process in provided. The articles are built by using a composition that includes a thermally polymerizable composition, a thermal initiator, and a nonlinear light-to-heat conversion material such as a reverse saturable dye. The article is built by the sequential exposure of adjacent voxels with a laser beam. Microlens arrays can be used to expose more than one voxel at a time.

Three-dimensional articles using nonlinear thermal polymerization

Growing community of inventors

Oakdale, MN, United States of America

Robert J DeVoe