公开(公告)号：US11339280B2

公开(公告)日：2022-05-24

申请号：US16981217

申请日：2019-03-15

Applicant: BASELL POLIOLEFINE ITALIA S.R.L.

Inventor： Takeshi Tsukahara ,  Nobuyuki Tsurumi ,  Shitoshi Kanno ,  Kunio Yamamoto ,  Takeshi Nakajima

IPC: C08L23/16 ,  C08L23/14 ,  C08L23/08

Abstract: A polypropylene composition made from or containing: (i) component (1) made from or containing a propylene/ethylene copolymer containing more than 1.5% by weight and not more than 4% by weight of an ethylene-derived unit; (ii) component (2) made from or containing an ethylene/propylene copolymer containing 65 to 87% by weight of an ethylene-derived unit; and (iii) 0.01 to 0.5 parts by weight of a crystal nucleating agent, based on a total of 100 parts by weight of component (1) and component (2); wherein the polypropylene composition has 1) weight ratio of component (1) to component (2) is in the range of 80:20 to 90:10, 2) intrinsic viscosity of xylene solubles (XSIV) in the range of 0.8 to 1.4 dl/g, 3) MFR (at 230° C. under a load of 2.16 kg) in the range of 5 to 15 g/10 min., 4) viscosity ratio in the range of 0.40 to 0.80 where Viscosity ⁢ ⁢ ratio = XSIV Intrinsic ⁢ ⁢ viscosity ⁢ ⁢ of ⁢ ⁢ component ⁢ ⁢ ( 1 ) .

公开(公告)号：US11306198B2

公开(公告)日：2022-04-19

申请号：US16981092

申请日：2019-03-15

Applicant: BASELL POLIOLEFINE ITALIA S.R.L.

Inventor： Takeshi Tsukahara ,  Nobuyuki Tsurumi ,  Shitoshi Kanno ,  Kunio Yamamoto ,  Takeshi Nakajima

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.