| US 7,538,174 B2 | ||
| Isotactic 1-butene copolymers | ||
| Luigi Resconi, Ferrara (Italy); Anteo Pelliconi, Occhiobello (Italy); and Enea Garagnani, Ferrara (Italy) | ||
| Assigned to Basell Polyolefine GmbH, Wesseling (Germany) | ||
| Filed on Oct. 30, 2007, as Appl. No. 11/981,497. | ||
| Application 11/981497 is a division of application No. 10/536857, previously published as PCT/EP03/12944, filed on Nov. 14, 2003. | ||
| Claims priority of provisional application 60/431802, filed on Dec. 09, 2002. | ||
| Claims priority of application No. 02080121 (EP), filed on Dec. 04, 2002. | ||
| Prior Publication US 2008/0249273 A1, Oct. 09, 2008 | ||
| Int. Cl. C08F 210/08 (2006.01); C08F 4/642 (2006.01); C08F 4/6592 (2006.01) | ||
| U.S. Cl. 526—348.6 [526/160; 526/161; 526/165; 526/348.2; 526/943; 502/155] | 7 Claims |
| 1. An isotactic 1-butene copolymer having a content up to 30% by mol of at least one alpha-olefin of formula CH2═CHZ derived units, wherein Z is a C3-C20 hydrocarbon group, having the following features:
isotactic pentads (mmmm)>90%; and
a percentage of soluble fraction in diethylether (% SD) and a molar content of said alpha olefins (% O) in the polymer chain
meeting the following relation:
% SD>2.8% O+8.
|