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Ethylene copolymer having excellent processability

A technology of ethylene copolymer and olefin copolymerization, which is applied in the field of ethylene copolymer and can solve the problems of impact strength, tear strength drop, low DRI, etc.

Active Publication Date: 2017-05-17
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an indicator of the degree of long-chain branching, DRI (Dow Rheology Index) is used, and 02 2 = The DRI at the level of 1 is too low, as low as about 0.2 to 0.3, and it is difficult to expect the effect of greatly improving extrusion processability
[0010] U.S. published patents US 005962598 A1 and US 0035545 A1 proposed the technology of adding a small amount of organic peroxide to improve the foaming stability of polyethylene, but the film produced in this way produces mechanical properties such as impact strength and tear strength. The problem of sharp decline

Method used

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  • Ethylene copolymer having excellent processability
  • Ethylene copolymer having excellent processability
  • Ethylene copolymer having excellent processability

Examples

Experimental program
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Effect test

manufacture example

[0111] Non-halogenated monocyclopentadienyl group 4 metal compound (dimethylsilylene(tert-butylamino)-(tetramethylcyclopentadienyl)-titanium dibenzyl:Me 2 Si(NtBu)(Cp*)Ti(Bn) 2 )Synthesis

[0112] Measure out Ti(CH 2 Ph) 4 5.2mmol and dimethylsilylene (t-butylamino)-(tetramethylcyclopentadienyl) (Dimethylsilylene (t-butylamido) (tetramethycyclopentadienyl)) 4.0mmol, injected with Schlenk Line ) 50mL of refined toluene, which was completely dissolved. The temperature of the reactor blocked from sunlight was raised to 60° C. and allowed to react for 12 hours.

[0113] The reaction was dried in vacuo. The dried reaction was extracted again with pentane, which was dried again in vacuo to finally give Me 2 Si(NtBu)(Cp*)Ti(Bn) 2 . The yield was greater than 90%. The structure of the compound through 1 Confirmed by H NMR.

[0114] 1 H NMR (400MHz, C6D6) 7.16 (Ph, 4H, d), 6.95 (Ph, 4H, t), 6.90 (Ph, 2H, t), 2.58 (CH 2 Ph,2H,d),2.25(CH 2 Ph,2H,d),1.81(C 5 Me 4 ,6H,s),1....

Embodiment 1

[0116] [Manufacture of Metallocene Supported Catalyst]

[0117] For trade name XPO-2402 (Grace Company (USA), average particle size ~ 50 μ m, surface area 300 m 2 / g, fine pore volume 1.6ml / g, OH concentration 1mmol / g) dehydrated silica, quantitatively 500g under anhydrous conditions, stirred with toluene to form a slurry state. It was injected into a 10 L reactor with stirrer and condenser. The methylaluminoxane solution (10% by weight) (methylaluminoxane / g silica=15 mmol / g silica) was quantified with a graduated cylinder, and injected into the reactor. Then, the temperature of the reactor was raised to 110° C. while stirring. The loading reaction was allowed to proceed for 90 minutes at this temperature. After the reaction was completed, the reactant was placed, and the upper solution was decanted. Inject 500 mL of toluene solution, wash the reactant, place the reactant, and decant the upper solution. This operation was repeated twice.

[0118] A quantitative amount of...

Embodiment 2

[0148] In Example 1, no ethylenebis(4,5,6,7-tetrahydroindenyl)zirconium dichloride (Et(THI) 2 ZrCl 2 ) as a metallocene catalyst component, a catalyst was produced using bis(n-butylcyclopentadienyl) zirconium dichloride under the same conditions as in Example 1, and polymerization was carried out under the same conditions as in Example 1.

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Abstract

The invention relates to an ethylene copolymer having excellent processability, and more particularly, relates to an ethylene copolymer having excellent extrusion processability and being prepared in a gas-phase reactor with a metallocene catalyst. The metallocene catalyst includes (A) a metallocene catalyst component, (B) a non-halogenated mono-ring pentadiene 4-group metal compound, (C) activative cocatalyst, and (D) a carrier component.

Description

technical field [0001] The present invention relates to ethylene copolymers for warm water and heating pipes, and specifically relates to rigidity, impact resistance, etc. compared with existing ethylene copolymers having the same melt index, molecular weight distribution, and density in metallocene catalyst technology An ethylene copolymer with excellent processability while maintaining physical properties. Background technique [0002] As raw materials for plastic pipes for warm water and heating tanks, several plastic materials such as polyethylene, polyvinyl chloride, polypropylene, and polybutylene are used. Among these materials, when comparing polyethylene with other materials, if you compare the advantages and disadvantages, the advantages Dominant and therefore have an advantage in the market. Polyethylene raw materials include cross-linked polyethylene and non-cross-linked polyethylene. Cross-linked polyethylene must add a cross-linking process in the material pro...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/14C08F4/6592C08F4/659
CPCC08F210/16C08F210/14C08F2500/12C08F2500/18C08F2500/20C08F2500/17C08F2500/03C08F2500/09C08F4/65927C08F4/6592C08F4/65916C08F4/65925
Inventor 杨春柄李泳周李殷雄
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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