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Process for preparing propylene polymer composition

A technology of propylene polymer and composition, which is applied in the field of olefin polymerization, and can solve problems such as the introduction of comonomers with low XS values ​​that have not been disclosed

Inactive Publication Date: 2020-11-10
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Low XS values ​​and simultaneous high comonomer incorporation are not disclosed in prior art documents

Method used

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  • Process for preparing propylene polymer composition
  • Process for preparing propylene polymer composition
  • Process for preparing propylene polymer composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0135] example

[0136] test methods

[0137] If not indicated otherwise, the parameters mentioned in this application were determined by the methods outlined below.

[0138] 1. Determination of comonomer content by IR spectroscopy

[0139] The 1-butene content was determined by quantitative Fourier transform infrared spectroscopy (FTIR) as described below.

[0140] Before the assay, the stabilized powder was compressed in a press as follows:

[0141] Press settings to homogenize the material:

[0142] - Pressing temperature: 210°C

[0143] - Melting time: 90 seconds

[0144] -Cooling rate: 12°C / min

[0145] -Demolding temperature: between 35 and 45°C

[0146] step 1 2 (cooling) Duration (seconds) 90 900 temperature(℃) 210 30 pressure (bar) 0 0

[0147] Press settings for IR tablets:

[0148] - Pressing temperature: 210°C

[0149] - Melting time: 45 seconds

[0150] - Compression pressure: 3 steps (10 / 30 / 90 bar)

[0151] -Coolin...

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Abstract

The present invention relates to a kind of olefin polymerization method, wherein propylene and C 4 to C 10 α-olefin monomers, preferably 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst to obtain polypropylene, wherein the polypropylene comprises C in an amount of 0.5 to 15% by weight 4 to C 10 α-olefin-derived comonomer units, preferably 1-butene-derived comonomer units, and ethylene-derived comonomer units in an amount of 0% to 3% by weight, wherein the Ziegler-Natta catalyst Comprising i) an external donor of formula (I): (R 3 ) z (R 2 O) y Si(R 1 ) x and ii) a solid catalyst component free of external support material.

Description

technical field [0001] The present invention relates to a process for the polymerization of olefins in which propylene and an alpha-olefin of 4 to 10 carbon atoms and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst comprising an external donor. Furthermore, the present invention relates to the propylene polymer composition prepared by the process of the present invention and the use of said propylene polymer composition for the preparation of articles. Background technique [0002] Good comonomer incorporation, ie good comonomer conversion and comonomer response is desirable to achieve better process economics and avoid the need for extensive work-up steps to remove residual hydrocarbons. In particular, higher monomers containing four or more carbon atoms often have low reactivity, causing problems such as deterioration of sensory properties of polymers. On the other hand, however, the use of such monomers is advantageous for many polymer propert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/06C08F4/646
CPCC08F210/06C08F4/6546C08F4/6465C08F4/6494C08F210/08C08F2500/12C08F2500/26C08F4/6545C08F4/651C08F210/16C08F2500/18C08F4/6492B32B27/08B32B27/32B32B2307/518C08F2800/20C08J5/18C08J2323/14
Inventor 威尔弗雷德·托尔奇卢吉·雷斯科尼克里斯汀·莱切尔特
Owner BOREALIS AG
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