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Highly viscous, largely amorphous polyolefin

A technology of polyolefin and polypropylene polymer, applied in the field of preparing such polyalpha-olefin, can solve the problems of poor operability, narrow molecular weight distribution, adverse effect of viscosity, etc.

Inactive Publication Date: 2009-04-22
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has a very narrow molecular weight distribution, up to 4, which adversely affects viscosity
Furthermore, no melting point appears in DSC measurements, and is also completely amorphous, with all the disadvantages associated with it, such as poor workability and low heat resistance

Method used

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  • Highly viscous, largely amorphous polyolefin
  • Highly viscous, largely amorphous polyolefin
  • Highly viscous, largely amorphous polyolefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 8

[0078] Examples 1 to 8: Preparation of polyolefins

[0079] Using TiCl reduced with Al 4 (TiCl 3 0.33AlCl 3 ) form of crystalline titanium trichloride and triisobutylaluminum (weight ratio 1:4) composition of the mixed catalyst, the monomer in n-butane given in Table 1 at the temperature given in Table 1, in The polymerization was carried out in a laboratory autoclave, optionally using hydrogen as molar mass regulator. The pressure is 22 to 25 bar. The monomers ethylene and propylene were metered in continuously over a reaction time of 3 hours; the monomer 1-butene and optionally higher olefins were added first. After 3 hours, the reaction mixture was mixed with isopropanol to terminate the reaction. Unreacted monomers and the solvent n-butane were evaporated in an evaporator. The polyolefin melt exits at a temperature of about 190°C.

[0080] The analytical values ​​of the obtained products are listed in Table 1.

[0081] Measurement method 1 For determining solubi...

Embodiment 9

[0087] Mixtures of Sabic PP520P, isotactic polypropylene and the product from Example 1 in different quantitative ratios were prepared on an ENTEX extruder at 190° C. and a mixing time of 10 minutes. Table 2 gives details and results.

Embodiment 10

[0089] As Example 9; instead of the product from Example 1, the product from Example 2 was used. Table 3 gives details and results.

[0090] As can be seen from Examples 9 and 10, in the scope of mixing a small amount of the polyolefin of the present invention (up to about 30% by weight), compared with the corresponding composition ratio, the elongation at break is obviously improved, and the glass transition point T g Significantly lower. Elongation at break is e.g. related to films, while T g The position of α significantly affects the low temperature impact toughness. The melt flow in this range is surprisingly small, so that this molding compound is well suited for extrusion.

[0091]

[0092]

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Abstract

The invention relates to a polyolefin containing the following monomer units: a) a maximum of 25 wt. % of units derived from ethene, b) a maximum of 75 wt. % of units derived from propene, and c) between 5 and 100 wt. % of units derived from an a-olefin containing between 4 and 20 C atoms. The inventive polyolefin has the following parameters: d) a weight-average molecular weight of between 70,000 and 10,000,000 g / mol, e) a polydispersity of between 4 and 60, f) a melting viscosity, measured by oscillation rheometry with a shearing speed of 1 Hz at 190 DEG C, of between 100,000 and 100,000,000 mPa s, g) a needle penetration of between 3 and 70 0.1 mm, h) a melting enthalpy of between 2 and 100 J / g, i) a glass transition temperature Tg of between -15 DEG C and -80 DEG C, and j) an end of the crystalline part melting range at between 85 and 175 DEG C. The inventive polyolefin is compatible both with ethylene polymers and propylene polymers, and is suitable for using in films, sealing strips, and moulded parts.

Description

technical field [0001] The present invention relates to a substantially amorphous and also high molecular weight polyalphaolefin suitable for use, for example, in polymer films and thermal and insulating films due to its properties. In order to meet the requirements of the stated fields of application, particular proportions of molecular weight, molecular weight distribution (polydispersity), degree of branching (α-value), degree of crystallinity, glass transition temperature and viscosity (structural viscosity) must be present, which can be determined by means of a single The parameters of the body composition and preparation method were adjusted. The invention also relates to a process for preparing such polyalphaolefins. Background technique [0002] Substantially amorphous polyalphaolefins have long been disclosed. DE-A-1442831 already describes a catalyst system comprising, on the one hand, the reaction product of a titanium trihalide with an aluminum compound and, on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/06C08L23/10C08J5/00C09K3/10
CPCC08F297/08C08F297/083C08F210/16C08L23/083C08F10/08C08F210/06C08F110/08C08L23/04C08L23/10C08L2205/02C08L2666/06C08F2500/11C08F2500/01C08F2500/17C08F2500/20C08F210/08C08F2500/36C08F210/14C08F210/00C08F210/02C08F210/04C08J5/18
Inventor H·G·贝克H·G·魏W·基利安T·施托耶茨基M·福恩霍尔特M·费J·德尔克斯H·-D·查格夫卡
Owner EVONIK OPERATIONS GMBH
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