Invention Grant
- Patent Title: Fire resistant cable with ceramifiable layer
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Application No.: US15510078Application Date: 2014-09-12
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Publication No.: US10068684B2Publication Date: 2018-09-04
- Inventor: Vito Scrima , Fabio Tosi
- Applicant: PRYSMIAN S.p.A.
- Applicant Address: IT Milan
- Assignee: PRYSMIAN S.p.A.
- Current Assignee: PRYSMIAN S.p.A.
- Current Assignee Address: IT Milan
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/IB2014/064474 WO 20140912
- International Announcement: WO2016/038427 WO 20160317
- Main IPC: G02B6/44
- IPC: G02B6/44 ; H01B7/295 ; C08L23/08 ; C08K3/08 ; C08K3/36

Abstract:
A fire resistant cable comprising: at least one conducting element; at least one layer, surrounding said conducting element, made of a ceramifiable composition comprising: a polymeric material comprising an ethylene/vinyl acetate copolymer as main polymer; at least 25 wt % of silica; a fluxing agent selected from alkaline metal oxides or precursors thereof; a stabilizing agent comprising at least one of MgO, CaO, PbO, B2O3, or a precursor thereof; from 0.1 wt % to 5 wt % of a hydroxide selected from magnesium hydroxide, aluminum hydroxide and mixtures thereof; the above percentages being expressed with respect to the weight of the ceramifiable composition. Upon exposure to elevated temperatures such as those encountered in case of fire, the ceramifiable composition is transformed into a ceramic material capable of protecting the conducting element from fire and mechanical stresses. The fire resistant cable of the present invention can continue operating under fire conditions for a certain period of time.
Public/Granted literature
- US20170250007A1 FIRE RESISTANT CABLE WITH CERAMIFIABLE LAYER Public/Granted day:2017-08-31
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