[특허]Polymer resins having improved barrier properties and methods of making same

[미국특허] Polymer resins having improved barrier properties and methods of making same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08F-210/02 C08F-210/00
출원번호	US-0875373 (2010-09-03)
등록번호	US-8476394 (2013-07-02)
발명자 / 주소	St. Jean, Guylaine Yang, Qing Tso, Chung McDaniel, Max P.
출원인 / 주소	Chevron Philips Chemical Company LP
대리인 / 주소	Conley Rose, P.C.
인용정보	피인용 횟수 : 5 인용 특허 : 56

초록 ▼

A polymeric resin having a lower molecular weight (LMW) component and a higher molecular weight (HMW) component and the resin having a density of from about 0.955 g/cc to about 0.967 g/cc, a melt index of from about 0.5 dg/min to about 4.0 dg/min, and a zero shear viscosity of from about 3.0×103 Pa-s to about 4.0×104 Pa-s. A method comprising providing a catalyst system comprising at least one transition metal complex, an activator support, and a cocatalyst; contacting the catalyst system with an olefin under conditions suitable to form a polyolefin, wherein the polyolefin has a HMW component and a LMW component; and recovering the polyolefin, wherein the polyolefin has a melt index of from about 0.5 dg/min to about 4.0 dg/min, and a zero shear viscosity of from about 3.0×103 Pa-s to about 4.0×104 Pa-s.

대표청구항 ▼

1. A polymeric resin having a lower molecular weight (LMW) component and a higher molecular weight (HMW) component and the resin having a density of from about 0.955 g/cc to about 0.967 g/cc, a melt index of from about 0.5 dg/min to about 4.0 dg/min, a zero shear viscosity of from about 3.0×103 Pa-s to about 4.0×104 Pa-s and a CY-a parameter of from about 0.4 to about 0.7. 2. The resin of claim 1 wherein the HMW component has a weight average molecular weight of from about 120 kg/mol to about 365 kg/mol. 3. The resin of claim 1 wherein the LMW component has a weight average molecular weight of from about 5 kg/mol to about 100 kg/mol. 4. The resin of claim 1 wherein the percentage of HMW is from about 20 wt % to about 80 wt % based on the total weight of the resin. 5. The resin of claim 1 wherein the HMW component has long chain branching in the range greater than about 0 to equal to or less than about 0.10 per about 10,000 carbon atoms. 6. The resin of claim 1 having a polydispersity index of from about 5 to about 12. 7. The resin of claim 1 having a melt index of from about 0.8 dg/min to about 2 dg/min. 8. The resin of claim 1 having a relaxation time of from about 0.01 s to about 0.10 s. 9. The resin of claim 1 having a E100 of from about 5.0×102 Pa-s to about 2.0×103 Pa-s where E100 is the viscosity at 100 s−1. 10. A film produced from the resin of claim 1. 11. The film of claim 10 having a thickness of from about 0.3 mil to about 3 mil. 12. The film of claim 10 having a moisture vapor transmission rate of from about 0.30 g·mil/100 in2/day to about 0.85 g·mil/100 in2/day. 13. A polymeric resin having a lower molecular weight (LMW) component and a higher molecular weight (HMW) component and the resin having a density of from about 0.955 g/cc to about 0.967 g/cc, a melt index of from about 0.5 dg/min to about 4.0 dg/min, a zero shear viscosity of from about 3.0×103 Pa-s to about 4.0×104 Pa-s and a CY-a parameter of from about 0.4 to about 0.7, wherein a film produced from the polymeric resin and having a thickness of from about 0.3 mil to about 3 mil has a moisture vapor transmission rate of from about 0.30 g·mil/100 in1/day to about 0.85 g·mil/100 in2/day. 14. A method comprising: (a) providing a catalyst system comprising at least one transition metal complex, an activator support, and a cocatalyst;(b) contacting the catalyst system with an olefin under conditions suitable to form a polyolefin, wherein the polyolefin has a higher molecular weight (HMW) component and a lower molecular weight (LMW) component; and(c) recovering the polyolefin, wherein the polyolefin has a melt index of from about 0.5 dg/min to about 4.0 dg/min, a zero shear viscosity of from about 3.0×103 Pa-s to about 4.0×104 Pa-s and a CY-a parameter of from about 0.4 to about 0.7. 15. The method of claim 14 wherein the olefin comprises ethylene and the polyolefin comprises polyethylene. 16. The method of claim 15 wherein the polyethylene has a density of from about 0.955 g/cc to about 0.967 g/cc. 17. The method of claim 15 wherein the polyethylene has a HMW component having a weight average molecular weight of from about 120 kg/mol to about 365 kg/mol. 18. The method of claim 15 wherein the polyethylene has a LMW component having a weight average molecular weight of from about 5 kg/mol to about 100 kg/mol. 19. The method of claim 14 further comprising producing a cast film from the polyolefin. 20. The method of claim 19 wherein the cast film has a moisture vapor transmission rate of from about 0.30 g·mil/100 in2/day to about 0.85 g·mil/100 in2/day. 21. The method of claim 19 further comprising forming the film into a food packaging item. 22. The method of claim 14 wherein the catalyst system comprises at least two metallocenes and the resin comprises a blend of polymers. 23. The method of claim 22 wherein the blend of polymers is a physical blend, a reactor blend, or combinations thereof. 24. The method of claim 14 further comprising treating the HMW component to increase long chain branching. 25. The method of claim 24 wherein treating the HMW component to increase long chain branching comprises contacting the HMW component with a dialkyl peroxide.

이 특허에 인용된 특허 (56) 인용/피인용 타임라인 분석

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이 특허를 인용한 특허 (5) 인용/피인용 타임라인 분석

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Sukhadia, Ashish M.; McDaniel, Max P.; Ding, Errun; St. Jean, Guylaine; Yang, Qing; Hert, Daniel G.; Tso, Chung Ching, Low density polyolefin resins with low molecular weight and high molecular weight components, and films made therefrom.
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[미국특허] Polymer resins having improved barrier properties and methods of making same 원문보기

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