- 专利标题: Polypropylene based composition with improved paintability
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申请号: US17269208申请日: 2019-08-23
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公开(公告)号: US12084567B2公开(公告)日: 2024-09-10
- 发明人: Jingbo Wang , Klaus Bernreitner , Daniela Mileva , Georg Grestenberger , Markus Gahleitner
- 申请人: BOREALIS AG
- 申请人地址: AT Vienna
- 专利权人: BOREALIS AG
- 当前专利权人: BOREALIS AG
- 当前专利权人地址: AT Vienna
- 代理机构: Tarolli, Sundheim, Covell & Tummino LLP
- 优先权: EP 193004 2018.09.06
- 国际申请: PCT/EP2019/072561 2019.08.23
- 国际公布: WO2020/048794A 2020.03.12
- 进入国家日期: 2021-02-17
- 主分类号: C08L23/14
- IPC分类号: C08L23/14 ; C08K3/34 ; C08L23/08 ; C08L23/16 ; C08L23/18
摘要:
The present invention relates to a polypropylene based composition comprising: (A) from 40.0 to 85.0 wt % of a heterophasic propylene copolymer having a content of xylene cold soluble (XCS) fraction in the range of 15 wt % to 35 wt %, based on the total weight of the heterophasic propylene copolymer; (B) from 5.0 to 15.0 wt % of a random copolymer of propylene with comonomer units selected from ethylene and alpha-olefins having from 4 to 12 carbon atoms which has been polymerized in the presence of a single-site catalyst system and has a melting temperature Tm as measured in differential scanning calorimetry (DSC) of less than 140° C.; (C) from 5.0 to 25.0 wt % of an ethylene copolymer with alpha-olefin comonomer units having from 4 to 12 carbon atoms with a density of from 850 kg/m3 to 900 kg/m3; and (D) from 5.0 to 25.0 wt % of an inorganic filler, wherein the amounts of components (A), (B), (C), and (D) are all based on the total weight amount of the polypropylene based composition, said polypropylene based composition having a melt flow rate (MFR2) as measured at 230° C. and 2.16 kg load in accordance with ISO 1133 in the range of 2.0 g/10 min to 20.0 g/10 min, an article comprising said polypropylene based composition and the use of said copolymer (B) for reducing the paint adhesion failure of an article comprising said polypropylene based composition.
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