CROSSLINKABLE POLYOLEFIN COMPOSITIONS FOR WIRE AND CABLE APPLICATIONS

    公开(公告)号:US20240240006A1

    公开(公告)日:2024-07-18

    申请号:US18289819

    申请日:2022-05-18

    申请人: Borealis AG

    IPC分类号: C08L23/08 C08F210/02

    摘要: The present invention relates to a crosslinkable polyolefin composition for wire and cable applications, and particularly for low voltage (LV) and medium voltage (MV) cables, to a cable comprising said compositions and to the use of said compositions for increasing the tensile strength and/or flexibility of a cable. The crosslinkable polyolefin composition of the invention comprises (a) 50 to 99 wt. %, based on the total polyolefin composition, of one or more ethylene copolymer(s) containing monomer units with polar groups and monomer units with hydrolysable silane groups, wherein the monomer units with polar groups are present in an amount of from 1 to 25 mol. % based on the total polyolefin composition, and (b) 1 to 50 wt. %, based on the total polyolefin composition, of a copolymer of ethylene and a C3 to C8 alpha-olefin co-monomer having a density of from 850 to 970 kg/m3 and a MFR2.16 of from 0.1 to 50 g/10 min. determined according to ISO 1133 at a temperature of 190° C. and a load of 2.16 kg. A cable comprising such a crosslinkable polyolefin composition and its use for increasing the tensile strength and/or flexibility of a cable are disclosed as well.

    ADDITIVES FOR HEAT-TREATED FOAMABLE POLYPROPYLENE

    公开(公告)号:US20240124672A1

    公开(公告)日:2024-04-18

    申请号:US17964430

    申请日:2022-10-12

    IPC分类号: C08J9/12 C08J9/14 C08L23/12

    摘要: A composition including a first polypropylene having at least 90 wt. % propylene by weight of the first polypropylene, an alpha nucleation inhibitor, and a beta nucleation additive is provided. Also provided is a method of preparing a foamable polypropylene composition. The method includes the steps: a) compounding a first polypropylene including at least 90 wt. % propylene by weight of the first polypropylene with an alpha nucleation inhibitor to form a polypropylene blend; b) compounding the polypropylene blend with a blowing agent to form a pre-annealed polypropylene composition; and c) annealing the pre-annealed polypropylene composition at an annealing temperature Ta for an annealing time ta to form the foamable polypropylene composition. The foamable polypropylene composition has a first melting peak T1 and a second melting peak T2 as measured by differential scanning calorimetry at a heating rate of 20° C. per minute.