Claims
- 1. A radiation-resistant polyolefin composition consisting essentially of
- (i) 100 parts by weight of a polyolefin; and
- (ii) a radiation-stabilizing amount of at least one aliphatic, unsaturated compound having at least one unsaturation site, said compound having a molecular weight of at least 200 and an iodine number of at least 25, wherein said radiation-stabilizing amount is from 0.25 to 7 parts by weight of said unsaturated compound, and said aliphatic, unsaturated compound is at least one member selected from the group consisting of soybean oil and safflower oil.
- 2. The radiation-resistant polyolefin composition of claim 1, wherein said polyolefin comprises a homopolymer or copolymer of propylene.
- 3. The radiation-resistant polyolefin composition of claim 2, wherein said polyolefin comprises a polypropylene homopolymer having a molecular weight distribution Mw/Mn of not greater than 7.0.
- 4. The radiation-resistant polyolefin composition of claim 1, wherein said aliphatic, unsaturated compound comprises soybean oil.
- 5. The radiation-resistant polyolefin composition of claim 1, wherein said aliphatic, unsaturated compound comprises safflower oil.
- 6. The radiation-resistant polyolefin of claim 1, further comprising at least one saturated mobilizing compound selected from the group consisting of hydrocarbon oils, halogenated hydrocarbon oils, phthalic ester oils, vegetable oils, silicone oils, and low molecular weight non-crystalline polymer greases.
Parent Case Info
This application is a continuation of application Ser. No. 08/674,940, filed Jul. 3, 1996 now abandoned, which is a continuation of application Ser. No. 08/414,086, filed Mar. 31, 1995 now abandoned.
US Referenced Citations (28)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0007736 |
Feb 1980 |
EPX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
674940 |
Jul 1996 |
|
Parent |
414086 |
Mar 1995 |
|