3m Innovative Properties Company

Other

Thu-Van T Tran

Audrey A Sherman

Michael Alan Meis

Kevin R Schaffer

Marie A Boulos

Albert I Everaerts

Jayshree Seth

Douglas Eugene Weiss

David James Yarusso

Ellen O Aeling

Michael D Determan

Kevin Michael Lewandowski

Jeffrey O Emslander

Karl E Benson

James L Bries

Craig E Hamer

Matthew T Scholz

Caroline M Ylitalo

Jason D Clapper

Neeraj Sharma

Soemantri Widagdo

Ross E Behling

Mark D Purgett

Soyoung Kim

Vivek Bharti

Daniel J O'Neal

Karl B Richter

Sasha B Myers

Dennis Edward Vogel

William H Moser

Kevin D Landgrebe

Wendi J Winkler

Richard B Ross

Arlin Lee Weikel

Joaquin Delgado

Eumi Pyun

Bruce A Sventek

Maria A Appeaning

Marie Aloshyna Ep Lesuffleur

Narina Y Stepanova

Adam S Cantor

Anthony R Plepys

Patrick J Yeshe

Hye-Ok Choi

Chan U Ko

Jeremy P Gundale

Haohao Lin

Jenna L Richardson

Tabitha A Clem

James A Bergman

Karen J Leisinger

Michiko Yamanaka

Peter J Harrison

Daniel J Renninger

David A Gries

Daniel J O'neal

Naiyong Jing

An adhesive tape and methods of use in cold or hot environments, such as in the construction industry, wherein the adhesive tape includes a pressure sensitive adhesive layer (preferably, an acrylic pressure sensitive adhesive layer) disposed on a backing (preferably, a multilayer backing).

Adhesive tapes and methods of use in construction

Described are viscoelastic damping materials and constructions which may demonstrate low temperature performance and adhesion and which may be used in making vibration damping composites. Viscoelastic damping materials and constructions may include polymers or copolymers of monomers according to formula I:CH&#x2550;CHR&#x2014;COOR&#x2003;&#x2003;[I]wherein Ris H, CHor CHCHand Ris a branched alkyl group containing 12 to 32 carbon atoms.

Low temperature vibration damping pressure sensitive adhesives and constructions

A halogen-free flame retardant adhesive comprises an acrylic copolymer preparable by polymerization of monomers comprising a first monomer which comprises a low glass transition temperature (Tg) monomer, a second monomer which comprises a high Tg monomer, wherein at least one of the first and second monomers comprises a (meth)acrylate, and a phosphinate containing monomer.

Halogen-free flame retardant pressure sensitive adhesive and tape

Described herein is a composition comprising a polymeric blend of: (i) a first polymer comprising at least one acrylic block copolymer, wherein the at least one acrylic block copolymer comprises: (a) at least two A block polymeric units wherein each A block has a glass transition temperature of at least 90 C and each A block is independently derived from a monoethylenically unsaturated monomer comprising a first (meth)acrylate monomer; and (b) at least one B block polymeric unit wherein the at least one B block has a glass transition temperature no greater than &#x2212;30 C and wherein the at least one B block is derived from a monoethylenically unsaturated monomer comprising a second (meth)acrylate monomer; and (ii) a second polymer selected from at least one of a polyvinyl acetal resin, a polyvinyl acetate, and a cellulose ester.

Compositions based on acrylic block copolymer blends

An adhesive composition includes a first acrylic polymer preparable from first components and a second acrylic polymer. The first components comprising i) a branched first alkyl (meth)acrylate having from 4 to 22 carbon atoms, and ii) at least one of acrylic acid and methacrylic acid. The second acrylic polymer is preparable from second components comprising iii) at least one second alkyl (meth)acrylate having from 4 to 22 carbon atoms, iv) a (meth)acrylamide represented by the formula wherein Ris H or methyl, and Rand Reach independently represents H or an alkyl group having from 1 to 8 carbon atoms, or taken together Rand Rmay form a divalent alkylene group having from 4 to 6 carbon atoms, and v) at least one high Tmacromer having a terminal free-radically polymerizable unsaturated group, the high Tmacromer having a Tof at least 45&#xb0; C. Based on the combined total weight of the at least one first acrylic polymer and the at least one second acrylic polymer, the at least one second acrylic polymer is present at a level of from 5 to 40 percent by weight. Methods of making the adhesive composition are also disclosed.

Adhesive compositions and articles, and methods of making and using the same

Disclosed herein is an optical device having a light source and a viscoelastic lightguide. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The viscoelastic lightguide may comprise a pressure sensitive adhesive. The optical device may be used in a variety of constructions wherein the device emits light being transported within the viscoelastic lightguide. Constructions include those used for signs, markings, illumination devices, display devices, keypad assemblies and tail light assemblies for vehicles.

Light source and optical article including viscoelastic lightguide disposed on a substrate

Disclosed herein is an optical device having a light source, a viscoelastic lightguide and a retroreflective film suitable for retroreflecting light. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The optical device may have a 'front lit' configuration such that light being transported within the lightguide is extracted and retroreflected by the film toward a viewer. The optical device may have a 'back lit' configuration such that light being transported within the lightguide is extracted and transmitted through the film toward a viewer. The retroreflective film may comprise beaded retroreflective sheeting such as that used in traffic signs and markings.

Retroreflective articles and devices having viscoelastic lightguide

Methods of (co)polymerizing ethylenically-unsaturated materials, including the steps of providing a non-deaerated mixture of free radically (co)polymerizable ethylenically-unsaturated material in a batch reactor, exposing the non-deaerated mixture to a source of ionizing radiation for a time sufficient to initiate (co)polymerization of at least a portion of the free radically (co)polymerizable ethylenically-unsaturated material, and allowing the free radically (co)polymerizable ethylenically-unsaturated material to (co)polymerize under essentially adiabatic conditions while continuing to expose the mixture to the source of ionizing radiation for a time sufficient to yield an at least partially (co)polymerized (co)polymer. The ethylenically-unsaturated materials are selected from vinyl-functional monomers, vinyl-functional oligomers, vinyl-functional macromers, and combinations thereof. The mixture is preferably free of thermally-induced or UV-induced free radical polymerization initiators. The source of ionizing radiation may be a gamma ray source, an x ray source, an electron beam source with an emission energy greater than 300 keV, and combinations thereof.

Method of polymerizing ethylenically-unsaturated materials using ionizing radiation

Methods of forming an adhesive composition including the steps of (a) combining a non-deaerated mixture comprising at least one free radically (co)polymerizable ethylenically-unsaturated material with a sealable packaging, wherein the packaging contains the non-deaerated mixture; (b) sealing the non-deaerated mixture in the packaging to form a sealed packaging; and (c) exposing the non-deaerated mixture in the sealed packaging to a source of ionizing radiation for a time sufficient to initiate (co)polymerization of at least a portion of the at least one free radically (co)polymerizable ethylenically-unsaturated material to form an adhesive composition in the sealed packaging. The (co)polymerization takes place essentially non-adiabatically. At least a portion of the packaging is meltable and mixable with the adhesive composition so as to provide a flowable coatable adhesive composition when the sealed packaging containing the adhesive composition is heated to a temperature sufficient to melt at least a portion of the packaging.

Method of making package viscoelastic compositions by polymerizing ethylenically-unsaturated materials using ionizing radiation

Disclosed herein is an optical device having a light source, a viscoelastic lightguide and a retroreflective film suitable for retroreflecting light. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The transported light is extracted from the lightguide and retroreflected at a structured surface of the retroreflective film. The optical device may have a 'front lit' or a 'back lit' configuration depending on the relative positioning of the lightguide and the retroreflective film. The retroreflective film may include prismatic retroreflective sheeting, holographic film or film structured with diffraction gratings. The optical device may be used, for example, as a sign or marking, a license plate assembly, a tail light assembly for vehicles, a security laminate for protection of documents against tampering, or an illumination device.

Light-activated antimicrobial devices and articles are disclosed. The devices include a light source and a light-activated antimicrobial article comprising a photosensitizer and a viscoelastic material such as a pressure sensitive adhesive adapted to receive light from the light source. The viscoelastic material may be adapted to transport light by total internal reflection. The photosensitizer may comprise a dye, a metal oxide or a composition that comprises anions that oxidize or react to form a gas. Upon activation of the light source, the photosensitizer absorbs light from the light source such that antimicrobial activity is exhibited. The photosensitizer may be included in the light-activated antimicrobial article or it may be provided as a topical composition that is separate from the article. The light-activated antimicrobial articles and devices may have constructions similar to those of wound dressings.

Light-activated antimicrobial article and method of use

An adhesive tape that is stretch releasable, articles that contain the adhesive tape, and uses of the adhesive tape are disclosed. The adhesive tapes include a backing layer that is adjacent to at least one pressure-sensitive adhesive layer. The backing layer typically is optically clear and includes a poly(alkylene) copolymer. The pressure-sensitive adhesive layer is a silicone-based adhesive composition. In many embodiments, the adhesive tape is optically clear.

Stretch releasable adhesive tape

An electroactive polymer device is described that includes at least one layer of a dielectric polymer that is a polymerized product of at least one ethylenically unsaturated nitrogen-containing monomer. Also disclosed is a transducer that includes the electroactive polymer as disclosed.

Electroactive polymers and articles containing them

Growing community of inventors

Maplewood, MN, United States of America

Thu-Van T Tran