LDPE for use as a blend component in shrinkage film applications
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-110/02
C08F-210/02
C08L-023/04
C08F-210/16
C08J-005/18
C08L-023/02
C08L-023/06
C08L-023/08
출원번호
US-0382010
(2010-08-04)
등록번호
US-9068032
(2015-06-30)
국제출원번호
PCT/US2010/044389
(2010-08-04)
§371/§102 date
20120103
(20120103)
국제공개번호
WO2011/019563
(2011-02-17)
발명자
/ 주소
Karjala, Teresa P.
Tice, Colleen M.
Kardos, Lori L.
Ortega, Jose
Yau, Wallace W.
Wang, Jian
출원인 / 주소
Dow Global Technologies LLC
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (Mw/Mn) from about 4 to about 10, a melt index (I2) from about 0.05 to about 2 grams per 10 minutes, a gpcBR value greater than 0.05 as determined by a
An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (Mw/Mn) from about 4 to about 10, a melt index (I2) from about 0.05 to about 2 grams per 10 minutes, a gpcBR value greater than 0.05 as determined by a gpcBR Branching Index and a Y value greater than 0.4 is disclosed. This ethylene-based polymer is especially useful for blending with other polymers such as LLDPE. When converting the blends into film, especially shrink film, the film shows good optics, good shrink tension, high stiffness, high tensile modulus, and tensile strength. When this resin is blended at with a LLDPE on a blown film line, improvements are seen in haze, gloss, clarity, and MD and CD tear as compared to a comparative LDPE.
대표청구항▼
1. An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (Mw/Mn) from about 4 to about 10, a melt index (I2) from about 0.05 to less than 0.8 grams per 10 minutes, a gpcBR value greater than 0.05, as deter
1. An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (Mw/Mn) from about 4 to about 10, a melt index (I2) from about 0.05 to less than 0.8 grams per 10 minutes, a gpcBR value greater than 0.05, as determined by a gpcBR Branching Index, and a GPC-LS characterization Y value greater than about 0.4, wherein the GPC-LS characterization Y value is determined according to the following formula; Y=Abs(A/B/(Abs(x)+0.05))wherein A is the area between (a) a straight line between a first intercept point and a second intercept point at the two logarithmic cc-GPC molecular weight values, located on the concentration-normalized LS chromatogram curve, and (b) the concentration-normalized LS chromatogram curve between the two logarithmic cc-GPC molecular weight values, and wherein B is the area under the concentration-normalized LS chromatogram curve between the two logarithmic cc-GPC molecular weight values; and wherein x is determined according to the following formula: x=LSresponse(Point2,CN)-LSresponse(Point1,CN)LSresponse(Point2,CN)logMW(Point2,ccGPC)-logMW(Point1,ccGPC)wherein LSresponse(Point2,CN) is the concentration-normalized (CN) LS response value for Intercept 2, corresponding to logarithmic cc-GPC molecular weight value of 6.0607, LSresponse(Point1,CN) is the concentration-normalized (CN) LS response value for Intercept 1, corresponding to the logarithmic cc-GPC molecular weight value of 5.3010, and log MW(Point2,ccGPC) is the logarithmic cc-GPC molecular weight for Intercept 2, corresponding to the logarithmic cc-GPC molecular weight value 6.0607, log MW(Point1,ccGPC) is the logarithmic cc-GPC molecular weight for Intercept 1 corresponding to the logarithmic cc-GPC molecular weight value of 5.3010; and wherein Abs( ) is the mathematical absolute value function, andwherein the ethylene-based polymer is a homopolymer. 2. The ethylene-based polymer of claim 1, where the Y value is greater than about 0.5. 3. The ethylene-based polymer of claim 1, where the melt index is less than 0.5 grams/10 minutes. 4. The ethylene-based polymer of claim 1 where the molecular weight distribution (Mw/Mn) of the ethylene-based polymer is from about 4 to about 6. 5. A composition comprising the ethylene-based polymer of claim 1 and at least one other natural or synthetic polymer. 6. The composition of claim 5, wherein the synthetic polymer is selected from the group consisting of linear low density polyethylene (LLDPE), high density polyethylene (HDPE), and low density polyethylene (LDPE). 7. The composition of claim 6 wherein the synthetic polymer comprises LLDPE. 8. The composition of claim 7, wherein the LLDPE comprises less than 50 percent by weight of the composition. 9. At least one film layer comprising the composition of claim 7. 10. The film of claim 9, wherein the film has a Surface/Internal haze from 1.20 to 1.79. 11. The polymer of claim 1, wherein the polymer has a cc GPC Mw in g/mol and a zero shear viscosity (ηo)(Pa*s) relationship log (ηo(Pa*s at 190° C.))>12.333*log(ccGPC Mw in g/mol)−56.367. 12. The polymer of claim 11, wherein the melt index is less than 0.7 grams/10 minutes. 13. The polymer of claim 12, wherein the log (ccGPC Mw in g/mol) is greater than 4.88. 14. The polymer of claim 1, wherein the polymer has a melt strength at 190° C. in cN of greater than 9 cN. 15. At least one film layer comprising the ethylene-based polymer of claim 1. 16. The film layer according to claim 15, wherein the film layer has a machine direction (MD) shrink tension greater than 12 psi. 17. The film of claim 15, wherein the film has a Surface/Internal haze from 1.81 to 2.67.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (2)
Juan Manuel Mezquita NL; Karl Zuercher CH; Ronald Wevers NL, Medium density ethylene polymers, a process to prepare these polymers and use of carbonyl group containing chain transfer agents in this process.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.