Claims
- 1. An ethylene based hydrocarbon polymer comprising ethylene, C.sub.a monomer and C.sub.b monomer,
- wherein the C.sub.a monomer is selected from propylene, butene-1 and mixtures thereof, and the C.sub.b monomer is selected from one or more C.sub.5 to C.sub.8 alpha monoolefins which contain no branching closer than the fourth carbon atom
- the molar ratio in the polymer of (C.sub.a /C.sub.2) is about 0.006 to 0.09 and the molar ratio of (C.sub.b /C.sub.2) is about 0.003 to 0.07, and the Branch Chain Factor is about 0.2 to 0.8, and said polymer being heterogeneous and having a density of about 0.91 to 0.94,
- n-hexane extractables content at 50.degree. C. of less than about 5.5 weight percent,
- melt index of about 0.5 to 5.0,
- M.sub.w /M.sub.n of about 2.7 to 4.3, and
- melt flow ratio of about 22 to 36.
- 2. A polymer as in claim 1 in which C.sub.a is propylene.
- 3. A polymer as in claim 1 in which C.sub.a is butene-1.
- 4. A polymer as in claim 2 or 3 in which C.sub.b is hexene-1.
- 5. A polymer as in claim 4 having a density of about 0.92 and an Elmendorf tear strength in compression molded film form of about 100 to 800 grams/mil.
- 6. Film formed from the polymer of claim 1.
- 7. Film formed from the polymer of claim 5.
Parent Case Info
This application is a division of our prior U.S. application: Ser. No. 49,555, filing date, June 18, 1979, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
53-24990 |
Jul 1978 |
JPX |
1532780 |
Nov 1978 |
GBX |
1543908 |
Apr 1979 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
49555 |
Jun 1979 |
|