发明名称 |
HIGHLY FILLED SOFT POLYOLEFIN COMPOSITION FOR ROOFING MEMBRANE |
摘要 |
The present disclosure relates to highly filled polyolefin compositions with improved balance of properties particularly for applications where puncture and tear resistance is requested comprising a flexible heterophasic polyolefin composition (I), consisting of a crystalline polymer fraction (A) consisting of a copolymer of propylene with ethylene having a fraction insoluble in xylene at 25° C. of at least 90% by weight, and an elastomeric fraction (B) consisting of a copolymer or blend of copolymers of ethylene with propylene; the copolymer or blend containing units derived from ethylene in a quantity lower than 40% by weight. The fraction soluble in xylene at 25° C. of the polyolefin composition having an IVgpc lower than 2.5 dl/g, a broad molecular weight distribution Mw/Mn (GPC) equal to or higher than 4, and a Mz/Mw (GPC) equal to or higher than 2.5. The filled polyolefin composition further comprises inorganic filler (II) and a butene-1 copolymer having: a flexural modulus (ISO 178) lower than 60 MPa, a Shore A (ISO 868) lower than 90 and a Tg (DMTA) lower than −20° C. |
申请公布号 |
US2016257809(A1) |
申请公布日期 |
2016.09.08 |
申请号 |
US201415029470 |
申请日期 |
2014.10.01 |
申请人 |
BASELL POLIOLEFINE ITALIA S.R.L. |
发明人 |
BIONDINI GISELLA;GRAZZI MICHELE;LUNGHI LUCA;CAVALIERI CLAUDIO |
分类号 |
C08L23/16;E04D5/06;E04B1/94;H01B3/44 |
主分类号 |
C08L23/16 |
代理机构 |
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代理人 |
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主权项 |
1. A filled polyolefin composition having a MFR (230° C./2.16 kg) of from 2 to 7/10 min comprising:
a) 35 to 65% by weight of a flexible heterophasic polyolefin composition (I), comprising the following fractions:
A) from greater than 40 to 55% by weight of a crystalline polymer fraction consisting of a copolymer of propylene with ethylene; the copolymer containing at least 85% by weight of units derived from propylene, and the crystalline fraction having a fraction insoluble in xylene at 25° C. of at least 90% by weight;B) from 45 to less than 60% by weight of an elastomeric fraction consisting of a copolymer or blend of copolymers of ethylene with propylene; the copolymer or blend containing units derived from ethylene in a quantity lower than 40% by weight; andthe fraction soluble in xylene at 25° C. of the polyolefin composition (I) having an IVgpc lower than 2.5 dl/g, a broad molecular weight distribution Mw/Mn (GPC) equal to or higher than 4, and a Mz/Mw (GPC) equal to or higher than 2.5; b) 30 to 80% by weight of an inorganic filler (II) selected from flame-retardant inorganic fillers and inorganic oxides or salts; and c) 2 to 25% by weight of a butene-1 copolymer having a flexural modulus (ISO 178) lower than 60 MPa, a Shore A (ISO 868) lower than 90 and a Tg (DMTA) lower than −20° C.; wherein the sum of a), b) and c) is 100%. |
地址 |
Milano IT |