发明申请
US20100105848A1 Propylene Impact Copolymers With Balanced Impact Strength And Stiffness
有权
丙烯冲击共聚物具有均衡的冲击强度和刚度
- 专利标题: Propylene Impact Copolymers With Balanced Impact Strength And Stiffness
- 专利标题(中): 丙烯冲击共聚物具有均衡的冲击强度和刚度
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申请号: US12258981申请日: 2008-10-27
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公开(公告)号: US20100105848A1公开(公告)日: 2010-04-29
- 发明人: Prasadarao Meka , Kevin Wayne Lawson
- 申请人: Prasadarao Meka , Kevin Wayne Lawson
- 主分类号: C08F2/38
- IPC分类号: C08F2/38 ; C08F210/06
摘要:
Disclosed is a propylene impact copolymer comprising a first polypropylene having an MFR1 within the range from 15 to 40 dg/min; a second polypropylene having an MFR2 within the range from 50 to 190 dg/min; an elastomeric polymer; and wherein the propylene impact copolymer has an MFRICP within the range from 6 to 18 dg/min; a 1% Secant Flexural Modulus of greater than 150 kpsi (1030 MPa); and an Izod Impact at 25° C. of greater than 10 ft-lbs/in (530 J/m). The impact copolymer may be produced in a two or three tandem-reactor system wherein the catalyst composition used in the second reactor to produce the second polypropylene is different from the catalyst composition used in the first reactor to produce the first polypropylene.
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