申请人:ExxonMobil Chemical Patents Inc.
公开号:US20190144577A1
公开(公告)日:2019-05-16
The present disclosure provides iron-containing catalyst compounds having a carbene ligand. Catalyst compounds of the present disclosure can be asymmetric, having an electron donating side of the catalyst and an electron deficient side of the catalyst. In some embodiments, catalysts of the present disclosure provide catalyst productivity values of 500 gPgcat−1hr−1 or greater and polyolefins, such as polyethylene copolymers, having comonomer content of 8 wt % or greater, a g′ vis value of 0.95 or greater, internal unsaturation content greater than 0.2 unsaturations per 1,000 carbons, broad orthogonal composition distribution, an Mn of 20,000 g/mol or greater, an Mw of 200,000 g/mol or greater, and an Mz/Mw from 2 to 5 or greater.
本公开提供具有卡宾配体的含铁催化剂化合物。本公开的催化剂化合物可以是不对称的,具有催化剂的电子给予侧和电子亏缺侧。在某些实施例中,本公开的催化剂提供500 gPgcat−1hr−1或更高的催化生产率值,以及聚烯烃,如共聚乙烯,其共聚物含量为8 wt %或更高,g′ vis值为0.95或更高,内部不饱和度大于每1,000个碳原子中的0.2个不饱和度,广泛的正交组成分布,Mn为20,000 g/mol或更高,Mw为200,000 g/mol或更高,且Mz/Mw为2至5或更高。