US7951743B2
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Preparation of ultra high molecular weight linear low density polyethylene
Assignee: Equistar Chemicals LP
•
Filing: 2008-07-29
•
Granted: 2011-05-31
•
Expires: 2028-07-29
Abstract
Abstract Disclosed is a method of preparing an ultra-high molecular weight, linear low density polyethylene with a catalyst system that comprises a bridged indenoindolyl transition metal complex, a non-bridged indenoindolyl transition metal complex, an alumoxane activator and a boron-containing activator. The ultra-high molecular weight, linear low density polyethylene has a weight average molecular weight greater than 1,000,000 and a density less than 0.940 g/cm 3 .
Inventors
- 👤 Shaotian Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:18
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/128; B01J31/14; B01J31/143; B01J31/146; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; C; C08; C08F; C08F10/00; C08F10/02; C08F110/00; C08F110/02; B01J2231/00; B01J2231/10; B01J2231/12; B01J2231/122; B01J2531/00; B01J2531/40; B01J2531/46; B01J2531/48; B01J2531/49; C08F210/00; C08F210/16; C08F2420/00; C08F2420/05; C08F2420/06; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65908; C08F4/65912; C08F4/65916; C08F4/6592; C08F4/65922; C08F4/65925; C08F4/65927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A catalyst system comprising a bridged indenoindolyl transition metal complex, a non-bridged indenoindolyl transition metal complex, an alumoxane activator and a boron-containing activator selected from the group consisting of tris(pentafluorophenyl)boron, tris(pentabromophenyl) boron, lithium tetrakis(pentafluorophenyl) borate, anilinium tetrakis(pentafluorophenyl) borate, triphenylcarbenium tetrakis(pentafluorophenyl) borate, and mixtures thereof, wherein the bridged complex has a structure selected from VII or VIII: and the non-bridged complex has a general structure of IX:
Claim 2
Dependent Claim
66 words
A catalyst system comprising a bridged indenoindolyl transition metal complex, a non-bridged indenoindolyl transition metal complex, an alumoxane activator and a boron-containing activator selected from the group consisting of tris(pentafluorophenyl)boron, tris(pentabromophenyl) boron, lithium tetrakis(pentafluorophenyl) borate, anilinium tetrakis(pentafluorophenyl) borate, triphenylcarbenium tetrakis(pentafluorophenyl) borate, and mixtures thereof, wherein the bridged complex has a structure selected from VII or VIII: and the non-bridged complex has a general structure of IX:
Claim 3
Dependent Claim
27 words
The catalyst system of claim 1 , wherein the molar ratio of the bridged complex to the non-bridged complex is within the range of 1:10 to 10:1.
Claim 4
Dependent Claim
29 words
The catalyst system of claim 1 , which is immobilized on a support selected from the group consisting of inorganic oxides, inorganic chlorides, organic polymer resins, and mixtures thereof.
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