Claims
- 1. An ethylene-.alpha.-olefin-nonconjugated polyene random copolymer having the following properties:
- (i) said copolymer contains units derived from ethylene (a) and units derived from an .alpha.-olefin of 4 or more carbon atoms (b) in a molar ratio, (a)/(b), of 40/60 to 95/5,
- (ii) the iodine value is in the range of 1 to 50,
- (iii) the intrinsic viscosity (.eta.), as measured in decahydronaphthalene at 135.degree. C., is in the range of 0.1 to 8.0 dl/g,
- (iv) the intensity ratio D of T.alpha..beta. to T.alpha..alpha. in the .sup.13 C-NMR spectrum, T.alpha..beta./T.alpha..alpha., is not more than 0.5,
- (v) the B value, as determined by the .sup.13 C-NMR spectrum and the following formula, is in the range of 1.00 to 1.50,
- B value=(P.sub.OE)/(2.(P.sub.E).(P.sub.O))
- wherein
- (P.sub.E) is a molar fraction of the units derived from ethylene (a) in the random copolymer,
- (P.sub.O) is a molar fraction of the units derived from the .alpha.-olefin (b) in the random copolymer, and
- (P.sub.OE) is a proportion of the number of the .alpha.-olefin-ethylene sequences to the number of all the dyad sequences in the random copolymer, and
- (vi) the glass transition temperature Tg, as measured by DSC, is not higher than -50.degree. C.
Priority Claims (3)
Number |
Date |
Country |
Kind |
6-316951 |
Dec 1994 |
JPX |
|
7-59289 |
Mar 1995 |
JPX |
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7-318400 |
Dec 1995 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 08/575,678, filed Dec. 19, 1995, now U.S. Pat. No. 5,696,214, issued Dec. 9, 1997.
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5292845 |
Kawasaki et al. |
Mar 1994 |
|
5491207 |
Hoel |
Feb 1996 |
|
5696214 |
Sagane et al. |
Dec 1997 |
|
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Divisions (1)
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Number |
Date |
Country |
Parent |
575678 |
Dec 1995 |
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