发明授权
US06242395B1 Methods for forming amorphous ultra-high molecular weight polyalphaolefin drag reducing agents using non-metallocene catalysts and alkylaluminoxane
有权
使用非金属茂催化剂和烷基铝氧烷形成无定形超高分子量聚α-烯烃减阻剂的方法
- 专利标题: Methods for forming amorphous ultra-high molecular weight polyalphaolefin drag reducing agents using non-metallocene catalysts and alkylaluminoxane
- 专利标题(中): 使用非金属茂催化剂和烷基铝氧烷形成无定形超高分子量聚α-烯烃减阻剂的方法
-
申请号: US09396285申请日: 1999-09-15
-
公开(公告)号: US06242395B1公开(公告)日: 2001-06-05
- 发明人: Gerald B. Eaton , Michael J. Monahan , Robert J. Tipton
- 申请人: Gerald B. Eaton , Michael J. Monahan , Robert J. Tipton
- 主分类号: C10M14306
- IPC分类号: C10M14306
摘要:
A composition including polyalphaolefins that function as drag reducing agents and a process for the preparation of polyalphaolefins that function as drag reducing agents are disclosed. The process includes contacting alpha olefin monomers with a catalyst system, which includes a catalyst and an activator (co-catalyst) in a reactant mixture. The catalyst is a transition metal catalyst, preferably titanium trichloride, and the co-catalyst may include an alkylaluminoxane, alone or in combination, with a dialkylaluminum halide or a halohydrocarbon. The polymerization of the alpha olefin monomers produces a non-crystalline, ultra-high molecular weight polyalphaolefin having an inherent viscosity of at least 10 dL/g. The addition of the alkylaluminoxane during the polymerization process provides for a non-crystalline, ultra-high molecular weight polyalphaolefin and a more uniform molecular weight distribution of the resulting polyalphaolefin, thereby creating a drag reducing agent superior to known drag reducing agents. A process for forming a drag reducing agent comprising a non-crystalline, ultra-high molecular weight polyalphaolefin having an inherent viscosity of about at least 10 dL/g and a process for reducing drag in a conduit are also disclosed.
信息查询