Propylene Homopolymer for Capacitors

A homopolymer and capacitor technology, applied in circuits, electrical components, insulators, etc., can solve the problem of not meeting the withstand voltage, and achieve the effect of excellent withstand voltage

Active Publication Date: 2011-12-21
MITSUI CHEM INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, only reducing the sintering residue (ash content) in polypropylene, improving the stereoregularity of polypropylene, and controlling the soluble part of p-heptane or xylene cannot meet the characteristics required by today's rapidly increasing withstand voltage. Material

Method used

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  • Propylene Homopolymer for Capacitors
  • Propylene Homopolymer for Capacitors
  • Propylene Homopolymer for Capacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] [Manufacture of propylene homopolymer (PP1)]

[0140] (1) Manufacture of solid catalyst carrier

[0141] Load SiO in a 1 L branched flask 2 (AGC Si-Tech Sunsphere H121) 300g was added to 800mL of toluene to make a slurry. Next, the liquid was transferred to a 5 L 4-neck flask, and 260 mL of toluene was added thereto. 2830 mL of a methylaluminoxane (hereinafter, MAO)-toluene solution (10 wt % solution) was introduced. Keep stirring at room temperature for 30 minutes. The temperature was raised to 110° C. over 1 hour, and the reaction was performed for 4 hours. After the reaction, cool to room temperature. After cooling, the supernatant toluene was removed and replaced with fresh toluene until the replacement rate reached 95%.

[0142] (2) Manufacture of solid catalyst (loading of metal catalytic component on carrier)

[0143] In the glove box, weigh dimethylmethylene (3-tert-butyl-5-methylcyclopentadienyl) (3,6-di-tert-butylfluorenyl) di Zirconium chloride 1.0g. ...

Embodiment 2

[0166] Polymerization was carried out as follows, except that the obtained propylene homopolymer (PP2) was used, and a stretched film was obtained in the same manner as in Example 1. The withstand voltage of the obtained stretched film was measured by the method described above. The results are shown in Table 1.

[0167] [Manufacture of propylene homopolymer (PP2)]

[0168] (1) Manufacture of solid catalyst carrier

[0169] Load SiO in a 1 L branched flask 2 (AGC Si-Tech Sunsphere H121) 300g was added to 800mL of toluene to make a slurry. Next, the liquid was transferred to a 5 L 4-neck flask, and 260 mL of toluene was added thereto. 2830 mL of a methylaluminoxane (hereinafter, MAO)-toluene solution (10 wt % solution) was introduced. Keep stirring at room temperature for 30 minutes. The temperature was raised to 110° C. over 1 hour, and the reaction was performed for 4 hours. After the reaction, cool to room temperature. After cooling, the supernatant toluene was remov...

Embodiment 3

[0183] Polymerization was carried out as follows, except that the obtained propylene homopolymer (PP3) was used, and a stretched film was obtained in the same manner as in Example 1. The withstand voltage of the obtained stretched film was measured by the method described above. The results are shown in Table 1.

[0184] [Manufacture of propylene homopolymer (PP3)]

[0185] (1) Manufacture of solid catalyst carrier

[0186] Load SiO in a 1 L branched flask 2 (AGC Si-Tech Sunsphere H121) 300g was added to 800mL of toluene to make a slurry. Next, the liquid was transferred to a 5 L 4-neck flask, and 260 mL of toluene was added thereto. 2830 mL of a methylaluminoxane (hereinafter, MAO)-toluene solution (10 wt % solution) was introduced. Keep stirring at room temperature for 30 minutes. The temperature was raised to 110° C. over 1 hour, and the reaction was performed for 4 hours. After the reaction, cool to room temperature. After cooling, the supernatant toluene was remov...

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Abstract

Provided is a propylene homopolymer suitably usable in a film for condensers having a high voltage resistance. Also provided is an oriented film obtained by orienting said propylene homopolymer. A propylene homopolymer for condensers satisfies the following requirements (i) to (v) and (ix)that : (i) the MFR is 1-10 g / 10 min; (ii)the mesopentad fraction (mmmm) measured by 13C-NMR is 0.940-0.995; (iii) the integrated elution amount measured by CFC at 90 DEG C is less than or equal to 0.5% by weight; (iv) the melting point measured by DSC is higher than or equal to 152 DEG C; (v) the chlorine content is less than or equal to 2 ppm by weight; and (ix) the peak half-width of eluted component amount to elution temperature measured by cross fractionation chromatography (CFC) with the use of o-dichlorobenzene is lower than or equal to 7.0 DEG C and the peak top temperature being 105-130 DEG C.

Description

technical field [0001] The present invention relates to a propylene homopolymer suitable for a film for capacitors excellent in voltage resistance and a stretched film for capacitors obtained therefrom. Background technique [0002] Since polypropylene has excellent tensile properties, it can be formed into a uniform film, and it is widely used in various fields utilizing its excellent properties. In addition, polypropylene has excellent electrical properties, so it is widely used in capacitor films. Recently, in the fields of home appliances and automobiles, the demand for capacitor films is increasing, and further improvement in withstand voltage of capacitor films made of polypropylene is desired. [0003] In order to further improve the withstand voltage of a capacitor film obtained from polypropylene, various polypropylenes have been proposed. For example, a polypropylene in which the stereoregularity is improved by making the isotactic pentad ratio of the part insolu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06H01B17/56
CPCH01B3/441C08F110/06C08F2500/12C08F2500/15C08F2500/20C08F2500/26C08J5/18B29C55/02H01B17/56
Inventor 田村聪板仓启太桥诘聪
Owner MITSUI CHEM INC
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