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The award-winning Phase Change Matters blog tracks the latest news and research on phase change materials and thermal energy storage. E-mail tips and comments to Ben Welter, communications director at Entropy Solutions. Follow the blog on Twitter at @PureTemp. Subscribe to the weekly PCM newsletter. Or join the discussion on LinkedIn.

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Patent application: Personal cooling device with PCM

Ben Welter - Friday, October 12, 2018

U.S. patent application 20180289531 (applicant Relief Technologies Inc., San Francisco, Calif.):

Relief Technologies patent drawing"A cooling device includes a package substrate, a plurality of cooling units, and device electronics. The plurality of cooling units are configured to cool a user's body. Each cooling unit includes a plurality of semiconductor cooling elements sandwiched between a first cooling unit substrate and a second cooling unit substrate. Each of the cooling units is connected to the package substrate. The device electronics are coupled to the cooling units. The device electronics are configured to store a first cooling device profile that includes data indicating an amount of power to deliver to each of the cooling units over a period of time. The device electronics are configured to deliver power to the cooling units according to the first cooling device profile, wirelessly receive a second cooling device profile from an external computing device, and deliver power to the cooling units according to the second cooling device profile."

http://www.freepatentsonline.com/20180289531.pdf

Patent application: Cooling circuit and method on a vehicle

Ben Welter - Friday, October 12, 2018

U.S. patent application 20180291798 (applicant Hutchinson SA, Paris, France):

"A temperature management system on a vehicle cooling circuit using a heat transfer liquid, the circuit comprising a path for circulating the liquid and, arranged on the path: in series, a means for circulating the liquid along the path, an engine for moving the vehicle, whose components are to be placed in a heat exchange relationship with the liquid, and a heat exchanger having an inlet and an outlet for said liquid in order to place this liquid in a heat exchange relationship with another fluid within the exchanger, mounted on a first leg, between the inlet and the outlet of the heat exchanger, a heat store into which said liquid can enter and from which it can exit, and valves positioned so that liquid arriving from the engine flows toward the heat exchanger and/or the heat store, the heat store being a latent heat storage and thermal energy release unit containing at least one volume: enclosing elements made of phase change material (PCM) for storing and releasing the thermal energy contained in said liquid in view of a heat exchange with this liquid (9), and around which is installed a thermal barrier comprising at least one first layer containing a phase change material and which is surrounded by one second layer containing a porous thermally insulating material to thermally isolate said volume from the outside."

http://www.freepatentsonline.com/20180291798.pdf

Patent application: Insulating plastic foams based on polyolefins

Ben Welter - Thursday, October 11, 2018

U.S. patent application 20180291166 (applicant Qatar University, Doha, Qatar):

"A method of manufacturing an article or material, the method comprising: forming a blend composition, the blend composition comprising a polyolefin, a phase change material, and an optional cross-linking agent, and an optional additive material; executing an operation comprising cross-linking the polyolefin to form a cross-linked intermediate composition; executing an operation comprising foaming the cross-linked intermediate composition to form a foamed article or material."

http://www.freepatentsonline.com/20180291166.pdf

Patent application: Even carbon number paraffin composition

Ben Welter - Thursday, October 11, 2018

U.S. patent application 20180290946 (applicant REG Synthetic Fuels LLC, Ames, Iowa):

"Paraffin compositions including mainly even carbon number paraffins, and a method for manufacturing the same, is disclosed herein. In one embodiment, the method involves contacting naturally occurring fatty acid/glycerides with hydrogen in a slurry bubble column reactor containing bimetallic catalysts with equivalent particle diameters from about 10 to about 400 micron. The even carbon number compositions are particularly useful as phase change material."

http://www.freepatentsonline.com/20180290946.pdf

Patent application: Protective gear and operating control method thereof

Ben Welter - Thursday, October 11, 2018

U.S. patent application 20180290044 (applicant Boe Technology Group Co. Ltd., Beijing, China):

Boe patent drawing"Protective gears and operating control methods thereof are provided. The protective gear includes at least one impact-resistant pad, containing a phase-change material and capable of at least partially wrapping a protected area; a phase-change controller, including a heating device and a cooling device configured to control the phase-change material; and a control circuit, configured to send a signal to the phase-change controller to control the phase-change material to be in a solid phase state after detecting a fall-down of the protected area, and send another signal to the phase-change controller to control the phase-change material to be in a liquid phase state after detecting an un-fall-down of the protected area."

http://www.freepatentsonline.com/20180290044.pdf

Patent application: Thermal interface composite material

Ben Welter - Friday, September 28, 2018

U.S. patent application 20180277910 (applicant Regents of the University of California, Oakland, Calif.):

"A composite thermal interface material and methods are shown. Devices such as lithium ion batteries incorporating composite thermal interface materials show significant improvement in cooling performance. In one example, composite thermal interface materials shown provide cooling through both a phase change mechanism, and a heat conducting mechanism which directs heat away from the device to be cooled, such as electrochemical cells in a battery, to an external housing and/or a coupled heat exchange device such as radiating fins."

http://www.freepatentsonline.com/20180277910.pdf

Patent application: Thermal energy storage phase change materials comprising triamines

Ben Welter - Friday, September 28, 2018

U.S. patent application 20180273819 (applicant Entropy Solutions LLC, Plymouth, Minn.)

"This invention generally relates to phase change materials, thermoregulation, thermal protection and insulation. In particular, in alternative embodiments, provided are organic Phase Change Materials having different chemical moieties including triamines, nitriles, anhydrides and/or benzoic acid and combinations thereof. ... In alternative embodiments, the Phase Change Material (PCMs) compositions and products of manufacture are used for thermal energy management and temperature stabilization in various applications such as building and insulation materials, automotive, airline, weapons systems, computers and electronics, clothing, packaging, cookware, garment and footwear, pharmaceuticals and drug storage systems, and other food and energy storage and temperature stabilization systems."

http://www.freepatentsonline.com/20180273819.pdf

Patent application: Low remnant free microcapsules and method of making same

Ben Welter - Friday, September 28, 2018

U.S. patent application 20180273820 (applicant Microtek Laboratories Inc., Dayton, Ohio)

"A microcapsule or microcapsule having a polymer wall comprising a melamine formaldehyde reacted with a crosslinking agent to form a unit cell according to a general formula (II) and/or the polymer wall has a FT-IR Spectrum as shown in FIG. 4. The crosslinking agent is a mixture of a reaction product of a cyclic urea (U) and a multifunctional aldehyde (A), and at least one crosslinker selected from the following group: a reaction products of (i) an aminotriazine and at least one aldehyde selected from the group consisting of aliphatic monoaldehydes and multifunctional aliphatic aldehydes, (ii) urea and/or cyclic ureas and formaldehyde, or (iii) phenols and aliphatic monoaldehydes, or from alkoxycarbonylaminotriazines, or multifunctional isocyanates, epoxides, aziridines, and carbodiimides."

http://www.freepatentsonline.com/20180273820.pdf

Patent application: Articulated panel for thermal insulation

Ben Welter - Sunday, September 23, 2018

Hutchinson patent drawingU.S. patent application 20180266619 (applicant Hutchinson, Paris, France):

"An assembly comprising a structure provided with an interior volume in which is present for example at least one fluid capable of circulating in said volume and under the action of circulation means. Thermally insulating elements of VIP construction are arranged around a layer containing a PCM and extending around the peripheral wall that surrounds the volume. Protrusions fixed to the peripheral wall delimited spaces in which the thermally insulating elements are positioned."

http://www.freepatentsonline.com/20180266619.pdf

Patent application: Body support cushion with multiple layers of phase change material

Ben Welter - Sunday, September 23, 2018

U.S. patent application 20180263377 (applicant Tempur-Pedic Management LLC, Lexington, Ky.):

"A body support cushion, e.g., mattress, has multiple foam layers, including a viscoelastic foam layer and a reticulated foam layer, and an outer cover. At least one of the foam layers and the outer cover each includes phase change material having latent heat properties that provide two intervals of dermal cooling."

http://www.freepatentsonline.com/20180263377.pdf