Abstract: Hydrophobic polyurethane polymers which may be useful in making synthetic leathers comprising at least two immediately consecutive repeating units according to Formula I: (—OC(O)N—)nA-NC(O)O-L(M)-??(I) wherein n is 1 or 2, A represents the residue of an organic di- or tri-isocyanate compound, L represents a hydrocarbon group that optionally contains one or more catenary or non-catenary hetero-atoms, and M represents an oligomer comprising 2-12 (meth)acrylate units. The polyurethane polymers may additionally comprise end group(s) according to the formula -L?M wherein L? represents a hydrocarbon group that may contain one or more catenary or non-catenary hetero-atoms. In some embodiments, M is according to Formula III: wherein Q is hydrogen or methyl, p is an integer between 2 and 12 inclusive, and Z is a hydrocarbon group which may optionally be substituted.
Type:
Grant
Filed:
December 21, 2018
Date of Patent:
May 25, 2021
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
Inventors:
Walter E. Partlo, Chetan P. Jariwala, Yongshang Lu, Michael T. Hayes
Abstract: Article comprising composite particles in an organic polymer matrix comprising a cured thiol-alkene resin having a Tg>20° C., the composite particles comprising a hydrophobic nonmetallic inorganic matrix, ligands, and quantum dots, wherein the hydrophobic nonmetallic inorganic matrix is present in the composite particles in an amount of up to 40 volume percent. Exemplary articles described herein can be made for use for display applications such as films, LED caps, LED coatings, LED lenses, and light guides. Exemplary articles described herein can be made for use for non-display applications such as security applications where quantum dot phosphors are used to provide fluorescence at selected or tailored wavelengths. In such uses, the organic polymer matrix could be a label or a coating on a label, or other articles such as a card or tag.
Type:
Grant
Filed:
December 20, 2016
Date of Patent:
May 25, 2021
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
Inventors:
Zai-Ming Qiu, Kenton D. Budd, Mahmut Aksit, Neeraj Sharma, Joseph M. Pieper
Abstract: A retarder including first and second outer layers and a birefringent layer disposed between and in direct contact with the first and second outer layers is described. The birefringent layer may include a first polyester having greater than 45 mole percent naphthalate units and greater than 45 mole percent ethylene units. Each of the first and second outer layers includes a second polyester which may include 40 to 50 mole percent naphthalate units, at least 25 mole percent ethylene units, and 10 to 25 mole percent of branched or cyclic C4-C10 alkyl units. The retarder has a retardance in a range of 1 micrometer to 100 micrometers.
Type:
Grant
Filed:
November 19, 2018
Date of Patent:
May 25, 2021
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
Inventors:
Stephen A. Johnson, Derek W. Patzman, Richard Y. Liu, Victor Ho, John F. Van Derlofske, III
Abstract: The disclosure describes techniques for detecting a crack or defect in a material. A computing device may determine whether a tested material includes a crack or other defect based on a temperature-scaled control data set and a measurement data set.
Abstract: A holding material for a pollution control element which can sufficiently suppress scattering of inorganic fibers when the pollution control element is assembled in a casing, and which has a sufficiently high coefficient of friction. The holding material includes: a sheet-like main body made of first inorganic fibers having a minor axis in the range of from about 3 to 10 ?m; and a surface layer which is provided on at least one surface of the main body and contains second inorganic fibers having a minor axis in the range of from about 1 to 15 nm.
Abstract: Various embodiments disclosed relate to a resin including nanoparticles including surface-bonded hydrophobically-modifying alkyl groups. The present invention provides a resin component that includes a curable resin. The resin component also includes nanoparticles dispersed in the resin. The nanoparticles each independently include surface-bonded hydrophobically-modifying (C1-C50)hydrocarbyl groups. At least one of the (C1-C50)hydrocarbyl groups is a (C1-C50)alkyl group and at least one of the surface-bonded hydrophobically-modifying (C1-C50)hydrocarbyl groups is a (C6-C50)aryl group.
Type:
Grant
Filed:
October 17, 2017
Date of Patent:
May 25, 2021
Assignee:
3M Innovative Properties Company
Inventors:
Steven C. Hackett, James M. Nelson, Wendy L. Thompson, Kristin L. Thunhorst
Abstract: The present disclosure relates to a connecting element and to a process for producing said connecting element. The present disclosure further relates to the use of said connecting element for friction-increasing connection of components to be joined in machine, plant and motor vehicle construction and energy generation.
Type:
Grant
Filed:
December 19, 2017
Date of Patent:
May 25, 2021
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
Inventors:
Florian T. Grimm, Martin Engler, Andreas I. Rendtel, Georg P. Victor, Daniel Burtsche, Martin Schweinberger
Abstract: A curved optical film generally lying in a base plane and having a thickness of less than 500 microns, and an average optical absorption of less than 70% for unpolarized normally incident light in a predetermined wavelength range is described. A first cross-section of the optical film in a first plane perpendicular to the base plane has an actual first length AL1 a projected first length PL1, and a first stretch ratio S1 of (AL1?PL1)/PL1. A second cross-section of the optical film in a second plane perpendicular to the first and base planes has an actual second length AL2, a projected second length PL2, and a second stretch ratio S2 of (AL2?PL2)/P2. The optical film may have a maximum thickness variation of less than 20% along each of the first and second cross-sections, S1 may be at least 0.1, and S2 may be at least 0.01 and less than 0.8S1.
Type:
Application
Filed:
May 15, 2019
Publication date:
May 20, 2021
Applicant:
3M Innovative Properties Company
Inventors:
Benjamin G. SONNEK, Daniel J. RICHTER, Gregg A. AMBUR, Chaodi LI, Christopher S. DEGRAW, Jathan D. EDWARDS
Abstract: An optical system including first and second optical elements for guiding light therein. For each optical element, the propagating light enters or exits the optical element through a coupling surface of the optical element. The coupling surfaces of the optical elements face, and align with, each other so that light propagating in one of the optical elements exits the optical element through the coupling surface of the optical element and enters the other optical element through the coupling surface of the other optical element. The coupling surfaces are separated from each other and define a region therebetween. The region is filled with a coolant, the coolant substantially surrounding at least one of the first and second optical elements.
Type:
Grant
Filed:
May 12, 2020
Date of Patent:
May 18, 2021
Assignee:
3M Innovative Properties Company
Inventors:
William J. Clatanoff, Daniel J. Treadwell, Phillip E. Tuma, Terry L. Smith, Donald K. Larson, Barry J. Koch
Abstract: A thermoset adhesive for bonding two materials having different linear expansion coefficients with reduced warping and without spaces being formed therebetween. The thermoset adhesive of the present invention comprises an epoxy resin, a core-shell rubber, thermally expansive microparticles, and a curing agent. The thermally expansive microparticles can have at least one or any combination of an average particle size of from 9 to 19 ?m, an expansion initiation temperature of from 70 to 100° C., and a maximum expansion temperature of from 110 to 135° C.
Abstract: Polymeric multilayer optical films are described. More particularly, polymeric multilayer optical films having a first optical packet and a second optical packet are described. The second optical packet is disposed on the first optical packet. How the configuration of the layers of the optical packets affect hemispheric reflectivity of the overall film is also described. The polymeric multilayer optical film reflects more than 95% of light from 400 nm to 700 nm at normal incidence.
Type:
Grant
Filed:
August 19, 2019
Date of Patent:
May 18, 2021
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
Inventors:
Timothy J. Nevitt, Ryan T. Fabick, Laurence R. Gilbert
Abstract: A method of making a benzophenonyl (alk)acrylic ester comprising adding to a mixing chamber of a microflow reactor a benzophenone alcohol, a benzophenone alcohol or substituted benzophenone alcohol comprising at least one hydroxy moiety, one or more bases, a polar liquid, an (alk)acryloyl halide or 3-haloalkylcarboxyl halide, and an organic liquid that is immiscible with the polar liquid; and producing a product stream comprising one or more benzophenonyl (alk)acrylic esters and one or more salts of the one or more bases; wherein the product stream has an organic portion and a polar portion, the organic portion of the product stream comprising the benzophenonyl (alk)acrylic ester, unreacted benzophenone alcohol or substituted benzophenone alcohol, and organic byproducts in the product stream; and further wherein either (a) the organic liquid comprises a compound of Formula (I); or (b) the method further comprises adding a compound of Formula (I) to the product stream; or (c) the organic liquid comprises a com
Abstract: A wound dressing is provided. The wound dressing includes a moisture-transmissible backing layer having a first major surface, a second major surface, and a backing layer perimeter; an absorbent hydrophilic adhesive adhered to at least a portion of the second major surface of the backing layer, the absorbent hydrophilic adhesive comprising an absorbent hydrophilic adhesive perimeter; an antimicrobial agent disposed in the absorbent hydrophilic adhesive; a porous layer having a first side adhered to the absorbent hydrophilic adhesive, a second side, and a porous layer perimeter; and a second hydrophobic adhesive adhered to the second side of the porous layer. The second major surface has a first hydrophobic adhesive disposed thereon proximate the backing layer perimeter. 100% of the absorbent hydrophilic adhesive perimeter is overlapped by the backing layer. At least 50% of the porous layer perimeter is overlapped by the absorbent hydrophilic adhesive.
Type:
Grant
Filed:
December 28, 2015
Date of Patent:
May 18, 2021
Assignee:
3M Innovative Properties Company
Inventors:
David R. Holm, Simon S. Fung, James M. Sieracki
Abstract: Disclosed is a compression device for applying compression to a body part of a user. The compression devices comprises a sleeve for substantially covering a portion of the body part of a user, wherein the sleeve has an outer surface, an inner surface, an upper edge, a lower edge and two lateral side edges. In the transverse direction from the first lateral side edge to the second lateral side edge the sleeve comprises a first lateral side region, a central region and a second lateral side region. At least the central region of the sleeve comprises a main material having elasticity in at least the transverse direction of the sleeve. A maximum elongation in the transverse direction is from 5% up to and including 30% under a load of 10 N per cm width and a difference quotient of tension in transverse direction from 20% elongation to 25% elongation equal to or greater that 0.6 N per cm width per percent elongation.
Type:
Grant
Filed:
August 20, 2018
Date of Patent:
May 18, 2021
Assignee:
3M Innovative Properties Company
Inventors:
Joannes F. H. M. Schuren, Guido Hitschmann, Edward L. Weaver, II, Kay Mohr
Abstract: An optical stack including an oriented polymeric multilayer optical film and a non-birefringent optical filter is described. The oriented polymeric multilayer optical film has a first reflection band with a first band edge and the non-birefringent optical filter has a first blocking band. In some cases, the first blocking band contains the first band edge and the first blocking band provides a reduction in variation of a band edge of an overall blocking band of the optical stack.
Type:
Grant
Filed:
June 30, 2017
Date of Patent:
May 18, 2021
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
Inventors:
John A. Wheatley, Guanglei Du, Gilles J. Benoit, Rolf W. Biernath, Christopher A. McLaughlin, Sherie A. Kristie
Abstract: An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent is the reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The air filter may be used for capturing e.g. reactive gases.
Type:
Grant
Filed:
March 10, 2017
Date of Patent:
May 11, 2021
Assignee:
3M Innovative Properties Company
Inventors:
Derek M. Maanum, Michael S. Wendland, Michael W. Kobe, Austin D. Groth, Neal A. Rakow