[특허]Ethylene copolymers, film and polymerization process

Ethylene copolymers, film and polymerization process 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-027/32 C08F-210/16 C08F-004/6592 C08J-005/18 C08F-004/659
출원번호	US-0718604 (2015-05-21)
등록번호	US-9382394 (2016-07-05)
우선권정보	CA-2780508 (2012-06-21); CA-2798855 (2012-12-14)
발명자 / 주소	Ker, Victoria Lam, Patrick Jiang, Yan Hoang, Peter Phung Minh Morrison, Darryl J. Carter, Charles Ashton Garret
출원인 / 주소	NOVA Chemicals (International) S.A.
대리인 / 주소	Heinrich, Julie L.
인용정보	피인용 횟수 : 0 인용 특허 : 78

초록

Ethylene copolymers having a relatively high melt flow ratio and a multimodal profile in a temperature rising elution fractionation (TREF) plot are disclosed. The copolymers can be made into film having good dart impact values and good stiffness properties under decreased extruder pressures.

대표청구항 ▼

1. A film layer having a dart impact of greater than 500 g/mil, a 1% MD secant modulus of greater than 150 MPa, a 1% TD secant modulus of greater than 175 MPa and a ratio of MD tear to TD of 0.75 or less; wherein the film layer comprises an ethylene copolymer having a density of from 0.916 g/cc to 0.930 g/cc, a melt index (I2) of from 0.1 g/10 min to 1.0 g/10 min, a melt flow ratio (I21/I2) of from 32 to 50, a molecular weight distribution (Mw/Mn) of from 3.6 to 6.5, a reverse comonomer distribution profile as determined by GPC-FTIR, a multimodal TREF profile, and a composition distribution breadth index CDBI50 of from 35 wt % to 70 wt % as determined by TREF; and wherein the ethylene copolymer is made by a process for polymerizing ethylene and an alpha olefin having 3-8 carbon atoms in a single reactor in the presence of a polymerization catalyst system comprising a single transition metal catalyst, a support, and a catalyst activator; and wherein the single transition metal catalyst is a group 4 phosphinimine catalyst. 2. The film layer of claim 1 wherein the ratio of MD tear to TD tear is from 0.2 to 0.6. 3. The film layer of claim 1 wherein the ratio of MD tear to TD tear is 0.45 or less. 4. The film layer of claim 1 wherein the ethylene copolymer has a density of from 0.917 g/cc to 0.927 g/cc. 5. The film layer of claim 1 wherein the polymerization catalyst system further comprises a catalyst modifier. 6. A film layer having a dart impact of greater than 500 g/mil, a 1% MD secant modulus of greater than 150 MPa, a 1% TD secant modulus of greater than 175 MPa and a ratio of MD tear to TD of 0.75 or less; wherein the film layer comprises an ethylene copolymer which is not a blend, having a density of from 0.916 g/cc to 0.930 g/cc, a melt index (I2) of from 0.2 g/10 min to 0.85 g/10 min, a melt flow ratio (I21/I2) of from 36 to 50, a molecular weight distribution (Mw/Mn) of from 4.0 to 6.0, a Z-average molecular weight distribution (Mz/Mw) of from 2.0 to 4.0, a reverse comonomer distribution profile as determined by GPC-FTIR, a multimodal TREF profile comprising three intensity peaks occurring at elution temperatures T(low), T(med) and T(high), where T(low) is from 62° C. to 82° C., T(med) is from 76° C. to 89° C. but higher than T(low), and T(high) is from 90° C. to 100° C., and a composition distribution breadth index CDBI50 of from 35 wt % to 70 wt % as determined by TREF. 7. The film layer of claim 6 wherein the ethylene copolymer has a density of from 0.917 g/cc to 0.927 g/cc.

이 특허에 인용된 특허 (78)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Ethylene copolymers, film and polymerization process 원문보기

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Ethylene copolymers, film and polymerization process 원문보기

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