发明名称 |
Impact copolymer compositions for use in corrugated board |
摘要 |
The present invention relates to polymer compositions comprising a propylene impact copolymer and a processing aid, as well as corrugated boards made from such compositions. The impact copolymer has a melt flow range of from 1.5 to 3.5 g/10 min and a dispersed phase content of from 5 to 30% by weight. The dispersed phase of the impact copolymer has an ethylene content of from 30- to 70% by weight of the dispersed phase. The matrix phase of the impact copolymer is a propylene homopolymer or a random copolymer comprising units derived from propylene and a second copolymer selected from either ethylene or 1-butene wherein the units derived from the second copolymer comprise from 0 to 5% by weight of the dispersed phase. |
申请公布号 |
US9109106(B2) |
申请公布日期 |
2015.08.18 |
申请号 |
US201113115619 |
申请日期 |
2011.05.25 |
申请人 |
Braskem America, Inc. |
发明人 |
Dias Peter S.;Tau Li-Min;Kaarto John |
分类号 |
B32B3/28;C08L23/00;C08L23/04;C08F8/00;C08F214/26;C08L27/12;C08L23/12 |
主分类号 |
B32B3/28 |
代理机构 |
Duane Morris LLP |
代理人 |
Duane Morris LLP |
主权项 |
1. A corrugated board comprising an impact copolymer and a processing aid, wherein the impact copolymer has a melt flow range of from 1.5 to 3.5 g/10 min, and a dispersed phase content of from 5 to 30% by weight, wherein the dispersed phase has an ethylene content of from 30 to 70% by weight of the dispersed phase; and wherein a matrix phase comprises a propylene polymer derived from units of propylene and from 0 to 5% by weight of the dispersed phase of a second comonomer comprising ethylene or 1-butene, and the corrugated board is characterized by having a wall thickness of less than 0.3 mm. |
地址 |
Philadelphia PA US |