Polypropylene for film capacitor, biaxially stretched film for film capacitor, film capacitor, and process for producing the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01G-004/18
C08J-005/18
C08K-005/156
C08L-023/12
C08F-110/06
C08K-005/1575
H01G-004/33
C08J-003/20
C08K-005/053
B29C-047/00
B29C-055/14
B29K-023/00
B29L-031/34
출원번호
US-0562796
(2016-03-30)
등록번호
US-10256041
(2019-04-09)
우선권정보
JP-2015-073210 (2015-03-31)
국제출원번호
PCT/JP2016/060304
(2016-03-30)
국제공개번호
WO2016/159044
(2016-10-06)
발명자
/ 주소
Tamura, Satoshi
Birukawa, Jun
Shimizu, Hiroki
출원인 / 주소
PRIME POLYMER CO., LTD.
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A polypropylene (F) for film condensers having the following requirements: (1) an MFR (JIS K 7210, 230° C., 2.16 kg load) in the range of 1-10 (g/10 min), (2) an mmmm fraction that is at least 93%, (3) a 2,1erythro position defect amount as measured using 13C-NMR that is less than 0.1 mol %, (4) ash
A polypropylene (F) for film condensers having the following requirements: (1) an MFR (JIS K 7210, 230° C., 2.16 kg load) in the range of 1-10 (g/10 min), (2) an mmmm fraction that is at least 93%, (3) a 2,1erythro position defect amount as measured using 13C-NMR that is less than 0.1 mol %, (4) ash content obtained by complete combustion in atmosphere that is at most 50 ppm, (5) chlorine content as measured by ion chromatography that is at most 5 ppm; and (6) is obtained by including a propylene homopolymer for which Mw/Mn as measured via GPC is 6.5-12 and an α-crystal nucleating agent with a melting point of at most 290° C.
대표청구항▼
1. A polypropylene for a film capacitor, comprising a propylene homopolymer and an α crystal nucleating agent having a melting point of not more than 290° C., wherein the propylene homopolymer satisfies at least that: (1) the melt flow rate (MFR) is within a range of 1 to 10 (g/10 min), as determine
1. A polypropylene for a film capacitor, comprising a propylene homopolymer and an α crystal nucleating agent having a melting point of not more than 290° C., wherein the propylene homopolymer satisfies at least that: (1) the melt flow rate (MFR) is within a range of 1 to 10 (g/10 min), as determined at 230° C. under a load of 2.16 kg in accordance with JIS K 7210;(2) the isotactic pentad fraction (mmmm fraction) is not less than 93%, as determined using 13C-NMR;(3) the proportion of erythro regio defects is less than 0.1% by mol, as determined using 13C-NMR;(4) the ash amount is not more than 50 ppm, as obtained by completely burning the propylene homopolymer in the air;(5) the chlorine amount is not more than 5 ppm, as determined by ion chromatography; and(6) the molecular weight distribution Mw/Mn is 6.5 to 12, as measured by gel permeation chromatography (GPC). 2. The polypropylene for a film capacitor according to claim 1, which is obtained by melt-kneading at least the propylene homopolymer and the α crystal nucleating agent. 3. The polypropylene for a film capacitor according to claim 1, wherein the α crystal nucleating agent is at least one member selected from a nonitol derivative and a sorbitol derivative. 4. The polypropylene for a film capacitor according to claim 1, wherein the amount of the α crystal nucleating agent is 1 to 2000 ppm based on 100% by weight of the propylene homopolymer. 5. A biaxially stretched film for a film capacitor, which is obtained by biaxially stretching the polypropylene for a film capacitor according to claim 1. 6. A film capacitor, comprising the biaxially stretched film for a film capacitor according to claim 5. 7. A process for producing a polypropylene for a film capacitor, comprising melt-kneading at least a propylene homopolymer satisfying the following requirements (1) to (6) and an α crystal nucleating agent having a melting point of not more than 290° C., (1) the melt flow rate (MFR) is within a range of 1 to 10 (g/10 min), as determined at 230° C. under a load of 2.16 kg in accordance with JIS K 7210;(2) the isotactic pentad fraction (mmmm fraction) is not less than 93%, as determined using 13C-NMR;(3) the proportion of erythro regio defects is less than 0.1% by mol, as determined using 13C-NMR;(4) the ash amount is not more than 50 ppm, as obtained by completely burning the propylene homopolymer in the air;(5) the chlorine amount is not more than 5 ppm, as determined by ion chromatography; and(6) the molecular weight distribution Mw/Mn is 6.5 to 12, as measured by gel permeation chromatography (GPC). 8. A process for producing a biaxially stretched film for a film capacitor, comprising biaxially stretching the polypropylene for a film capacitor according to claim 1.
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