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Polyethylene and catalyst composition for its preparation

A technology of polymerization catalyst and catalyst, which is applied in the direction of transportation and packaging, thin material processing, etc., and can solve unsatisfactory problems

Inactive Publication Date: 2011-01-05
BASELL POLYOLEFINE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand it is not possible to adjust the upper cooling lip and thus the bubble shape on all extrusion lines
[0013] Known ethylene copolymer blends are still unsatisfactory in terms of good mechanical properties, good processability and high optical quality

Method used

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  • Polyethylene and catalyst composition for its preparation
  • Polyethylene and catalyst composition for its preparation
  • Polyethylene and catalyst composition for its preparation

Examples

Experimental program
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preparation example Construction

[0290] Preparation of each component

[0291] 2,6-bis[1-(2-tert-butylphenylimino)ethyl]pyridine was prepared according to the method in Example 6 of WO 98 / 27124 and according to the method in Example 15 of WO 98 / 27124 Methods Preparation of dichloro·2,6-bis[1-(2-tert-butylphenylimino)ethyl]pyridinium iron(II).

[0292] 2,6-bis[1-(2,4,6-trimethylphenylimino)ethyl]pyridine was prepared according to the method in Example 1 of WO 98 / 27124 and reacted with ferric chloride ( II) reaction to give dichloro 2,6-bis[1-(2,4,6-trimethylphenylimino)ethyl]pyridinium iron(II), likewise according to WO 98 / 27124 disclosed method.

[0293] According to the method of Qian et al., Organometallics 2003, 22, 4312-4321, dichloro-2,6-bis[1-(2,4-dichloro-6-methylphenylimino)ethyl]pyridine iron (II). Here, 65.6 g of 2,6-diacetylpyridine (0.4 mol), 170 g of 2,4-dichloro-6-methylaniline (0.483 mol), 32 g of silica gel type 135 and 160 g of molecular sieves (4 Å ) in 1500 ml of toluene was stirred at...

Embodiment 1

[0296] a) Carrier pretreatment

[0297] XPO-2107, a spray-dried silica gel obtained from Grace, was baked at 600°C for 6 hours, and then 252.2 g of the dried silica gel was blended with 164.5 ml of MAO (4.75M in toluene, 0.78 mol). The mixture was stirred for one hour, filtered and the solid was washed with toluene and dried under reduced pressure.

[0298] b) Preparation of mixed catalyst system

[0299] 1.48g (2.45mmol) of dichloro 2,6-bis[1-(2,4-dichloro-6-methylphenylimino)ethyl]pyridinium iron (II), 3.61g (7.34mmol ) of dichlorobis(n-butylcyclopentadienyl)hafnium and 159.6ml of MAO (4.75M in toluene, 0.76mol) was stirred at room temperature for 1 hour, and then added to the 237.1 g of pretreated support material a) were suspended in 800 ml of toluene. The mixture was stirred at room temperature for another 3 hours and the resulting solid was filtered off and washed with toluene. The solid was dried under reduced pressure until free flowing. This gave 256.7 g of catal...

Embodiment 2

[0301] a) Carrier pretreatment

[0302] XPO-2107, spray-dried silica gel obtained from Grace, baked at 600°C for 6 hours.

[0303] b) Preparation of mixed catalyst system

[0304] 5.35g (9.69mmol) of dichloro-2,6-bis[1-(2-tert-butylphenylimino)ethyl]pyridinium iron (II), 7.49g (15.22mmol) of dichloro-bis A mixture of (n-butylcyclopentadienyl)hafnium and 472 ml of MAO (4.75 M in toluene, 2.24 mol) was stirred at room temperature for 30 minutes, and was then added to 276.8 g of in a suspension of the pretreated support material a) ((Fe+Hf):Al=1:90). The solid was dried under reduced pressure until free flowing. This gave 609 g of catalyst, which still contained 31.5% by weight of solvent (based on the total weight and calculated on the basis of complete loading of all components on the support).

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Abstract

The invention relates to a polyethylene and catalyst composition for its preparation. Polyethylene which comprises ethylene homopolymers and / or copolymers of ethylene with 1- alkenes and has a molar mass distribution width MW / Mn of from 3 to 30, a density of from 0.945 to 0.965 g / cm3, a weight average molar mass Mw of from 50 000 g / mol to 200 000 g / mol, a HLMI of from 10 to 300 g / 10 min and has from 0.1 to 15 branches / 1000 carbon atoms, wherein the 1 to 15 % by weight of the polyethylene having the highest molar masses have a degree of branching of more than 1 branch of side chains larger than CH3 / 1000 carbon atoms, a process for its preparation, catalysts suitable for its preparation and also injection moldings in which this polyethylene is present.

Description

[0001] This application is a divisional application of the invention patent application of PCT / EP2005 / 004406 with the application date of April 25, 2005 and the title of the invention is "Polyethylene and Catalyst Composition for its Preparation", the Chinese patent application of the original application The number is 200580021368.5. technical field [0002] The present invention relates to novel polyethylenes, catalyst compositions and processes for their preparation, and to fibers, molded articles, films or polymer mixtures in which the polyethylenes are present. Background technique [0003] There are continuously higher demands on the mechanical strength of films comprising polyethylene. In particular, there is a need for products having high stress crack resistance, impact toughness and rigidity which are particularly suitable in the production of films for food packaging. Simultaneously good stress crack resistance and rigidity are not easy to meet because these prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F210/16C08F4/6192C08F4/70C08F4/6392C08F4/659C08F4/6592C08F4/76C08F4/80C08F10/02C08F210/02
CPCC08F210/16C08F4/65912C08F4/65916C08F4/65925C08F10/02C08F210/02Y10T428/1345C08F4/61904C08F210/14C08F2500/04C08F2500/12C08F2500/17C08F2500/10C08F4/7042C08F220/10C08F2500/19C08F2500/20C08F2500/26C08F4/64C08F4/00
Inventor J·基普克S·米汉R·卡雷尔D·利尔格
Owner BASELL POLYOLEFINE GMBH
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