Invention Grant
- Patent Title: Polypropylene composition and molded article
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Application No.: US16981092Application Date: 2019-03-15
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Publication No.: US11306198B2Publication Date: 2022-04-19
- Inventor: Takeshi Tsukahara , Nobuyuki Tsurumi , Shitoshi Kanno , Kunio Yamamoto , Takeshi Nakajima
- Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
- Applicant Address: IT Milan
- Assignee: BASELL POLIOLEFINE ITALIA S.R.L.
- Current Assignee: BASELL POLIOLEFINE ITALIA S.R.L.
- Current Assignee Address: IT Milan
- Priority: JPJP2018-050028 20180316
- International Application: PCT/JP2019/012288 WO 20190315
- International Announcement: WO2019/177180 WO 20190919
- Main IPC: C08L23/14
- IPC: C08L23/14

Abstract:
A polypropylene composition made from or containing (i) component (1) made from or containing a propylene/ethylene copolymer containing 2 to 4% by weight of an ethylene-derived unit, based upon the total weight of the propylene/ethylene copolymer; and (ii) component (2) made from or containing an ethylene/propylene copolymer containing 65 to 87% by weight of an ethylene-derived unit, based upon the total weight of the ethylene/propylene copolymer; wherein the polypropylene composition has 1) a weight ratio of component (1) to component (2) in the range of 65:35 to 77:23, 2) an intrinsic viscosity of xylene solubles (XSIV) in the range of 0.8 to 1.4 dl/g, 3) a MFR (at 230° C. under a load of 2.16 kg) in the range of 15 to 40 g/10 min., and 4) the absence of a crystal nucleating agent.
Information query