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WO 2015/168096 Al 5 November 2015 (05.11.2015) P O P C T

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WO 2015/168096 Al 5 November 2015 (05.11.2015) P O P C T (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2015/168096 Al 5 November 2015 (05.11.2015) P O P C T (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every H01B 3/44 (2006.01) C08K 5/09 (2006.01) kind of national protection available): AE, AG, AL, AM, C08K 5/01 (2006.01) AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, (21) Number: International Application DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, PCT/US20 15/027950 HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, (22) International Filing Date: KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, 28 April 2015 (28.04.2015) MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, (25) Filing Language: English SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, (26) Publication Language: English TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: (84) Designated States (unless otherwise indicated, for every 61/987,716 1 May 2014 (01.05.2014) US kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, (71) Applicant: E. I. DU PONT DE NEMOURS AND COM¬ TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, PANY [US/US]; 1007 Market Street, Wilmington, DE TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, 19898 (US). DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, (72) Inventors: ROLLAND, Loic, Pierre; 98 Chemin du Re- SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, credoz Vesenex, 01220 Divonne les Bains (FR). ROULIN, GW, KM, ML, MR, NE, SN, TD, TG). Jacques; 42 E route d'Hermance, 1222 Vesenaz (CH). AN¬ DRE, Jacques; 12 Impasse du Chenet, 74100 Vetraz Published: Monthoux (FR). — with international search report (Art. 21(3)) (74) Agent: LAMMING, John, H.; E. I. du Pont de Nemours and Company, Legal Patent Records Center, Chestnut Run Plaza 721/2340, 974 Centre Road, PO Box 2915 Wilming ton, DE 19805 (US). © 00 o (54) Title: CABLES MADE OF PHASE CHANGE MATERIAL (57) Abstract: Disclosed is a cable comprising a core and a PCM layer surrounding the core wherein the PCM layer consists of a PCM composition wherein the PCM composition comprises a PCM and an ethylene copolymer; and the core consists of a yarn, strand, or wire each made of a natural or synthetic polymeric material or a metal. The invention is useful for thermal management in a variety of applications in such as, for example, automotive, building, packaging, garments, and footwear. CABLES MADE OF PHASE CHANGE MATERIAL RELATED APPLICATION This application claims priority under 35 U.S.C. § 119(e) from U.S. provisional application number 61/987,176 filed May 1, 2014, which is incorporated by reference herein in its entirety. BACKGROUND OF THE INVENTION The present invention relates to the field of phase change material (PCM) for thermal management in different applications like for example automotive, building, packaging, garments and footwear. In particular, the present invention relates to cables comprising a phase change material, the process of making thereof and their use in applications such as automotive. Phase change materials (PCM) are latent thermal storage materials that are capable of absorbing and releasing high amounts of latent heat during melting and crystallization, respectively. The thermal energy transfer occurs when a material is transformed from a solid to a liquid phase or from a liquid to a solid phase. During such phase changes, the temperature of the PCM material remains nearly constant as does the space surrounding the PCM material, the heat flowing through the PCM being "entrapped" within the PCM itself. Among other well- known PCM, paraffin is frequently used as PCM because of its low cost and low toxicity. PCM can be introduced in matrices made of different materials or applied to a coating. See, e.g., US4003426, US4528328, US5053446, US2006/0 124892 (WO2006/062610), WO98/04644, and WO2004/044345. In order to conveniently use the PCM in thermal management applications, the PCM have been so far incorporated into matrix polymers that absorb and retain the phase change materials, even at temperatures above the melting point of the PCM, thus making it possible to manufacture the resulting PCM composite materials into slabs, panels or other shapes that are easily mounted in a wall. However, most matrix polymers suffer from multiple drawbacks such as limited PCM absorption capacity, and substantial loss of PCM by exudation during lifetime. A partial solution to the above problems has been proposed in WO2006/062610, WO201 1/143278 and WO201 1/014636. However, there is still a need for PCM containing materials that provides high heat storage capacity, high surface contact for optimum thermal exchange, that may be resistant to temperatures from -20°C to 130°C under permanent exposure to air but also to chemicals, in particular to lubricating oil and/or to ethylene glycol, that may remain efficient with time and that may provide high thermal conductivity. SUMMARY OF THE INVENTION This aim has been achieved with a cable described herein wherein the cable can comprise a core and a PCM layer surrounding the core wherein the PCM layer consists of a PCM composition wherein a) the PCM composition comprises a PCM and an ethylene copolymer; and b) the core consists of a yarn, strand or wire made of a natural or synthetic polymeric material or a metal. Preferably, the amount of ethylene copolymer in the PCM composition can be lower or equal to 30 weight percent based on the total weight of the PCM composition. In a preferred embodiment, the ethylene copolymer is ethylene vinyl acetate (EVA). Preferably, the yarn, strand or wire in the cables of the present invention is made of polyparaphenylene terephtalamide (para-aramid). In another embodiment, the cables of the present invention further comprise one or more layer(s) of a protective polymer. Preferably the cables of the present invention comprise one layer of a protective polymer. Preferably, the protective polymer is made of a blend of ionomer and polyamide. Even more preferably, the cables of the present invention comprise two layers of a protective polymer. Preferably, the first layer of protective polymer is made of a blend of ionomer and polyamide and the second layer is made of a polymer selected from the group consisting of grafted or non-grafted polypropylene homopolymer, grafted or non-grafted polypropylene copolymer, perfluoro ethylene-propylene (FEP), perfluoroalkoxy alkane (PFA), ethylene tetrafluoroethylene (ETFE), ethylene acrylate rubber (AEM), and combinations of two or more thereof. Preferably, each layer of protective polymer may have a thickness of between 50 to 300 µιη. More preferably, when two layers are present, the thickness is between 50 to 600 µιη. Preferably, in the cables of the present invention, the amount of PCM is at least 70 weight percent based on the total weight of the cable. Preferred cables of the present invention have a diameter of 3 to 6 mm. Also disclosed herein is a process for making the cables of the present invention wherein the process comprises the steps of: a) providing a core consisting of yarn, strand or wire made of a natural or synthetic polymeric material or a metal and b) extruding a PCM composition onto the core. Optionally, the process further comprises a step c) wherein one or more layer(s) of one or more protective polymers are extruded onto the PCM composition and the core. Preferably two layers of protective polymer are extruded onto the PCM composition and the core. More preferably, the first layer is made of a blend of ionomer and polyamide and the second layer is made a polymer selected from the group consisting of grafted or non-grafted polypropylene homopolymer, grafted or non-grafted polypropylene copolymer, perfluoro ethylene-propylene (FEP), perfluoroalkoxy alkane (PFA), ethylene tetrafluoroethylene (ETFE), ethylene acrylate rubber (AEM), and combinations of two or more thereof. Also disclosed herein is the use of the cables of the present invention in thermal management, in particular in automotive. DETAILED DESCRIPTION Definitions As used herein, the term "a" refers to one as well as to at least one and is not an article that necessarily limits its referent noun to the singular. As used herein, the terms "about" and "at or about" are intended to mean that the amount or value in question may be the value designated or some other value about the same. The phrase is intended to convey that similar values promote equivalent results or effects according to the invention. As used herein, the term "acrylate" means an ester of acrylic acid with an alkyl group. Preferred in the invention are acrylates with alkyl groups having 1 to 4 carbon atoms. As used herein, the term, the term "(meth)acrylic acid" refers to methacrylic acid and/or acrylic acid, inclusively. Likewise, the term "(meth)acrylate" means methacrylate and/or acrylate and "poly(meth)acrylate" means polymers derived from the polymerization of either or a mixture of both corresponding type of monomers. As used herein, the term "copolymer" refers to polymers comprising copolymerized units resulting from copolymerization of two or more comonomers.
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