公开(公告)号：US09522984B2

公开(公告)日：2016-12-20

申请号：US14344553

申请日：2012-10-17

Applicant: JAPAN POLYPROPYLENE CORPORATION

Inventor： Motoki Kaneno ,  Koji Yamashita ,  Hiroshi Tsuji ,  Akihiro Suzuki ,  Shinichi Kitade ,  Masaru Aoki ,  Isamu Terayama

IPC: C08J9/06 ,  B29C51/02 ,  C08L23/12 ,  B29C47/00 ,  B29C47/92 ,  C08J9/00 ,  C08J9/08 ,  B29C44/20 ,  B29C44/50 ,  C08J5/18 ,  C08L23/14 ,  B29C49/04 ,  B29K23/00 ,  B29K105/00 ,  B29K105/04

CPC classification number: B29C44/505 ,  B29C47/0004 ,  B29C47/0026 ,  B29C47/0042 ,  B29C47/0054 ,  B29C47/92 ,  B29C49/04 ,  B29C51/02 ,  B29C2947/922 ,  B29C2947/92695 ,  B29K2023/12 ,  B29K2023/14 ,  B29K2105/0085 ,  B29K2105/0088 ,  B29K2105/04 ,  C08J9/0061 ,  C08J9/08 ,  C08J2201/03 ,  C08J2323/14 ,  C08J2423/12 ,  C08L23/12 ,  Y10T428/1376 ,  C08F210/06 ,  C08F210/16 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/17 ,  C08L23/14

Abstract: A polypropylene-based resin composition is provided that can provide a foam molding that exhibits an excellent closed cell characteristic and excellent extrusion characteristics, that is light weight and has a rigid feel, and that has an excellent recyclability.This polypropylene-based resin composition contains 100 weight % or is less than 100 weight % but at least 70 weight % of component (A) below and contains 0 weight % or is greater than 0 weight % but not more than 30 weight % of component (B) below, component (A): a propylene-based resin composition that comprises at least the following two components: a propylene-α-olefin copolymer (A1) satisfying conditions (A-1) to (A-3) and a propylene homopolymer (A2), (A1) and (A2) being obtained by polymerization by a multistage polymerization method, and this propylene-based resin composition having a content of (A1) of 1 to 20 weight % and a content of (A2) of 99 to 80 weight %, having a melt flow rate in the range from 5 to 20 g/10 minutes and exhibiting strain hardening in a measurement of extensional viscosity at a temperature of 180° C. and a strain rate of 10 s−1, (A-1) an α-olefin content of 15 to 85 weight %, (A-2) an intrinsic viscosity η of 5 to 20 dL/g, (A-3) a Mw/Mn of 5 to 15; component (B): a propylene-based resin composition comprising at least the following two components: a propylene homopolymer or a propylene-α-olefin copolymer having a content of non-propylene α-olefin of less than 1 weight % (B1), which has an MFR of 10 to 1000 g/10 minutes, and a propylene-α-olefin copolymer (B2) that has a weight-average molecular weight of 500,000 to 10,000,000 and a content of non-propylene α-olefin of 1 to 15 weight %, (B1) and (B2) being obtained by polymerization by a multistage polymerization method, and this propylene-based resin composition having a content of (B1) of 50 to 90 weight % and a content of (B2) of 50 to 10 weight %, and satisfying prescribed conditions (B-1) to (B-3).

公开(公告)号：US20150044405A1

公开(公告)日：2015-02-12

申请号：US14344553

申请日：2012-10-17

Applicant: JAPAN POLYPROPYLENE CORPORATION

Inventor： Motoki Kaneno ,  Koji Yamashita ,  Hiroshi Tsuji ,  Akihiro Suzuki ,  Shinichi Kitade ,  Masaru Aoki ,  Isamu Terayama

IPC: C08J9/06 ,  C08J5/18 ,  C08L23/14 ,  C08L23/12 ,  B29C44/20 ,  B29C44/50

CPC classification number: B29C44/505 ,  B29C47/0004 ,  B29C47/0026 ,  B29C47/0042 ,  B29C47/0054 ,  B29C47/92 ,  B29C49/04 ,  B29C51/02 ,  B29C2947/922 ,  B29C2947/92695 ,  B29K2023/12 ,  B29K2023/14 ,  B29K2105/0085 ,  B29K2105/0088 ,  B29K2105/04 ,  C08J9/0061 ,  C08J9/08 ,  C08J2201/03 ,  C08J2323/14 ,  C08J2423/12 ,  C08L23/12 ,  Y10T428/1376 ,  C08F210/06 ,  C08F210/16 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/17 ,  C08L23/14

Abstract: A polypropylene-based resin composition is provided that can provide a foam molding that exhibits an excellent closed cell characteristic and excellent extrusion characteristics, that is light weight and has a rigid feel, and that has an excellent recyclability.This polypropylene-based resin composition contains 100 weight % or is less than 100 weight % but at least 70 weight % of component (A) below and contains 0 weight % or is greater than 0 weight % but not more than 30 weight % of component (B) below, component (A): a propylene-based resin composition that comprises at least the following two components: a propylene-α-olefin copolymer (A1) satisfying conditions (A-1) to (A-3) and a propylene homopolymer (A2), (A1) and (A2) being obtained by polymerization by a multistage polymerization method, and this propylene-based resin composition having a content of (A1) of 1 to 20 weight % and a content of (A2) of 99 to 80 weight %, having a melt flow rate in the range from 5 to 20 g/10 minutes and exhibiting strain hardening in a measurement of extensional viscosity at a temperature of 180° C. and a strain rate of 10 s−1, (A-1) an α-olefin content of 15 to 85 weight %, (A-2) an intrinsic viscosity q of 5 to 20 dL/g, (A-3) a Mw/Mn of 5 to 15; component (B): a propylene-based resin composition comprising at least the following two components: a propylene homopolymer or a propylene-α-olefin copolymer having a content of non-propylene α-olefin of less than 1 weight % (B1), which has an MFR of 10 to 1000 g/10 minutes, and a propylene-α-olefin copolymer (B2) that has a weight-average molecular weight of 500,000 to 10,000,000 and a content of non-propylene α-olefin of 1 to 15 weight %, (B1) and (B2) being obtained by polymerization by a multistage polymerization method, and this propylene-based resin composition having a content of (B1) of 50 to 90 weight % and a content of (B2) of 50 to 10 weight %, and satisfying prescribed conditions (B-1) to (B-3).