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Polypropylene copolymer

A technology of polypropylene copolymer and propylene, which is applied in the field of propylene copolymer and its preparation, and can solve the problems of unsatisfactory reduction of melting point of comonomers, poor impact strength, processability, and damage to transparency, etc.

Inactive Publication Date: 2012-10-10
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this improvement in impact strength comes at the cost of poorer processability as the material becomes significantly more viscous, leading to reactor fouling
Also, considerable amounts of comonomers such as ethylene impair clarity
It must also be taken into account that the melting point of propylene copolymers is known to be very sensitive to an increase in comonomer content, i.e. a high content of comonomer undesirably lowers the melting point and / or crystallization point

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0537] Example 1: DIPDES; MFR 10 g / 10 min; C2 content 6.5% by weight (invention)

[0538] The propylene polymers used in the present invention are prepared according to the following procedure:

[0539] Raw materials:

[0540] - Hexane dried over molecular sieves (3 / 10A)

[0541] -TEAL: 93%, from Sigma-Aldrich

[0542] - electron donor: diisopropyldiethoxysilane from Wacker Chemie (the preparation of this electron donor is described in DE 38 21 483 A1)

[0543] -N 2 : Supplier AGA, quality 5.0; with catalyst BASF R0311, catalyst G132 (CuO / ZnO / C), molecular sieve (3 / 10A) and P 2 o 5 Purify.

[0544] - Hydrogen: Supplier AGA, quality 6.0

[0545] - Propylene: Supplier Borealis

[0546] - Vinyl: Supplier Air Liquide 3.5

[0547] - Catalyst Polytrack 8502 is commercially available from Grace.

[0548] -Sandos tab P-EPQ is an antioxidant and commercially available from Clariant

[0549] -Millad 3988 is a nucleating agent and is commercially available from Milliken

[...

Embodiment 2

[0560] Embodiment 2: DCPDMS; MFR 9 grams / 10 minutes; C2 content 6.5% by weight (the present invention)

[0561] The propylene polymers used in the present invention are prepared according to the following procedure:

[0562] Raw materials:

[0563] - Hexane dried over molecular sieves (3 / 10A)

[0564] -TEAL: 93%, from Sigma-Aldrich

[0565] - electron donor: diisopropyldiethoxysilane from Wacker Chemie (the preparation of this electron donor is described in DE 38 21 483 A1)

[0566] -N 2 : Supplier AGA, quality 5.0; with catalyst BASF R0311, catalyst G132 (CuO / ZnO / C), molecular sieve (3 / 10A) and P 2 o 5 Purify.

[0567] - Hydrogen: Supplier AGA, quality 6.0

[0568] - Propylene: Supplier Borealis

[0569] - Vinyl: Supplier Air Liquide 3.5

[0570] - Catalyst Polytrack 8502 is commercially available from Grace.

[0571] -Sandostab P-EPQ is an antioxidant and commercially available from Clariant

[0572] -Millad 3988 is a nucleating agent and is commercially availab...

Embodiment 3

[0583] Example 3: DIPDES; MFR 11 g / 10 min; C2 content 4.5% by weight (invention)

[0584] The propylene polymers used in the present invention are prepared according to the following procedure:

[0585] Raw materials:

[0586] - Hexane dried over molecular sieves (3 / 10A)

[0587] -TEAL: 93%, from Sigma-Aldrich

[0588] - electron donor: diisopropyldiethoxysilane from Wacker Chemie (the preparation of this electron donor is described in DE 38 21 483 A1)

[0589] -N 2 : Supplier AGA, quality 5.0; with catalyst BASF R0311, catalyst G132 (CuO / ZnO / C), molecular sieve (3 / 10A) and P 2 o 5 Purify.

[0590] - Hydrogen: Supplier AGA, quality 6.0

[0591] - Propylene: Supplier Borealis

[0592] - Vinyl: Supplier Air Liquide 3.5

[0593] - Catalyst Polytrack 8502 is commercially available from Grace.

[0594] -Sandostab P-EPQ is an antioxidant and commercially available from Clariant

[0595] -Millad 3988 is a nucleating agent and is commercially available from Milliken

[0...

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Abstract

A polypropylene copolymer comprising monomer units of propylene and at least one other a-olefin as a comonomer, wherein (a) the weight ratio of the a-olefin to the sum of monomers present in said polypropylene copolymer (a-olefin / (a-olefin + propylene)) is at least 2.0 wt.-%, and (b) the temperature rising elution fractionation (TREF) curve of said propylene copolymer comprises at least two localmaxima (i) one absolute maximum over 100 DEG C, and (ii) one relative maximum between 50 and 80 DEG C.

Description

technical field [0001] The present invention relates to a new class of propylene copolymers and their preparation. Background technique [0002] Known commercial propylene copolymers are characterized by improved impact strength and lower brittleness compared to propylene homopolymer counterparts. Accordingly, propylene copolymers, especially propylene copolymers containing ethylene as an α-olefin comonomer, have been widely used in the production of, for example, polymer films, articles made by blow molding or injection molding, fibers and pipes. Among these applications, the most important is for the preparation of thin films. Such films are useful in packaging, such as food packaging. Generally, to prepare propylene copolymers, propylene is copolymerized with alpha-olefins in a slurry or gas phase polymerization in the presence of a suitable catalyst. The amount of comonomer, ie alpha-olefin, generally does not exceed 10 mole percent of the total polymer. [0003] Com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/06C08F4/646C08F4/654
CPCC08F210/06C08F10/00C08F2410/01C08F4/651C08F4/6543C08F4/6465C08F210/16C08F2500/17C08F2500/12C08F2500/20C08F2500/11
Inventor K·里彻尔特K·伯恩雷特内M·劳赫
Owner ボレアリステクノロジーオイ
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