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Bopp-film

A thin-layer, ISO1133 technology, applied in the field of polypropylene preparation, can solve the problem of high residual silicon content

Active Publication Date: 2012-10-03
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene in said application has very promising electrical breakdown properties but relatively high residual silicon

Method used

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Examples

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Effect test

preparation example Construction

[0092] The preparation of the polypropylene of the present invention is described in more detail below.

[0093] The polypropylene of the present invention is obtained in particular by a novel catalyst system having a surface area of ​​less than 20 m 2 / g and comprising a catalyst represented by a transition metal compound of formula (I):

[0094] (Cp) 2 wxya 2 (I)

[0095] in:

[0096] X is independently a monovalent anionic ligand, such as a σ ligand,

[0097] Cp is an organic ligand selected from the group consisting of unsubstituted cyclopentadienyl, unsubstituted indenyl, unsubstituted tetrahydroindenyl, unsubstituted fluorenyl, substituted cyclopentadienyl , substituted indenyl, substituted tetrahydroindenyl, and substituted fluorenyl,

[0098] With the proviso that both Cp-ligands are selected from the group mentioned above and that the two Cp-ligands are chemically identical, i.e. identical,

[0099] R is a bridging group connecting two Cp-ligan...

Embodiment

[0187] A. Determination method

[0188] Unless otherwise stated, the following definitions of terms and determination methods are applicable to the above description and the following examples of the present invention.

[0189] Quantification of microstructure by NMR spectroscopy

[0190] Quantitative nuclear magnetic resonance (NMR) spectroscopy was used to quantify the isotacticity, regio-regularity, and comonomer content of the polymers.

[0191] use for 1 H and 13 C Bruker Advance III 400NMR spectrometers operating at 400.15MHz and 100.62MHz respectively to record the quantitative 13 C{ 1 H} NMR spectrum. At 125°C, with nitrogen for all cavities, by using 13 C Optimal 10mm Extended Temperature Probe ( 13 C optimized 10mm extended temperature probehead) to record all spectra.

[0192] For polypropylene homopolymers, dissolve approximately 200 mg of material in 1,2-tetrachloroethane-d 2 (TCE-d 2)middle. To ensure a homogeneous solution, after initial sample prepara...

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Abstract

Polypropylene having a melting temperature (Tm) of at least 151.0 DEG C, a melt flow rate MFR2 (230 DEG C) of more than 2.0 g / 10min, a xylene cold soluble fraction (XCS) of not more than 1.5 wt.-%, 13C-spectroscopy, and a number average molecular weight (Mn) of not more than 110 kg / mol.

Description

technical field [0001] The present invention relates to a new polypropylene and a capacitor film made from said polypropylene, as well as to the preparation of said polypropylene. Background technique [0002] Capacitor films must withstand extreme conditions such as high temperature and high electrical breakdown strength. Furthermore, it is preferred that the capacitor film has better mechanical properties such as higher stiffness and / or temperature resistance. To date, the prevailing opinion in the technical field of capacitor technology is that higher electrical breakdown strengths are only achievable at low levels of conductance caused by residual metals such as titanium, aluminum and chlorine. However, conventional polypropylene produced by Ziegler-Natta catalysts is contaminated with high levels of residual catalyst components. In order to obtain the extremely low levels of impurities desired to make polypropylene suitable for use in capacitor films, polypropylene mu...

Claims

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Application Information

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IPC IPC(8): C08F110/06H01B3/44B32B27/32
CPCC08F2410/01C08F110/06H01B3/441C08F4/65912C08F10/00C08F2500/12C08F2500/02C08F2500/20C08F2500/19C08F2500/26C08F4/65927C08F10/06C08J5/18H01B3/44B32B27/32C08L23/12C08F2500/00C08F4/76
Inventor D·格洛格尔K·克利姆克J·菲比希
Owner BOREALIS AG
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