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US 5,962,592 AGranted
Ethylene copolymer compositions
AssigneePhillips Petroleum Company
InventorsKevin J. Hess, Charles D. Houser, Rolf L. Geerts
Life of this patent
Estimating the term…
Abstract
An ethylene copolymer composition is provided that comprises: (a) an ethylene copolymer that has been produced with a metallocene catalyst system; (b) a crosslinking agent; and (c) a crosslinking coagent. This composition when crosslinked exhibits outstanding physical properties.
Claims48
An ethylene copolymer composition that comprises:
- (a) an ethylene copolymer that has been produced with a metallocene catalyst system, wherein said ethylene copolymer comprises ethylene and an alpha-olefin selected from the group consisting of 1-butene, 3-methyl-1-butene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-hexene, 3-ethyl-1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene, and wherein said ethylene copolymer has a density in the range of about 0.85 to about 0.96 grams per cubic centimeter and a melt index in the range of about 0.01 to about 100 grams per 10 minutes;
- (b) a crosslinking agent, wherein said crosslinking agent is an organic peroxide, and wherein said organic peroxide is present in said composition in an amount in the range of from about 0.05 weight percent to about 0.8 weight percent based on the weight of said copolymer;
- and
- (c) a coagent selected the group consisting of organic compounds that have allyl (CH.sub.2 CH.dbd.CH.sub.2) groups, 1.2 polybutadiene, and mixtures thereof, wherein said coagent is present in said composition in an weight ratio of the coagent to crosslinking agent from about 0.2 to about 4.
1 more element
An ethylene copolymer composition that comprises:
- (a) an ethylene copolymer that has been produced with a metallocene catalyst system, wherein said ethylene copolymer comprises ethylene and an alpha-olefin selected from the group consisting of 1-butene, 3-methyl-1-butene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-hexene, 3-ethyl-1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene, and wherein said ethylene copolymer has a density in the range of about 0.85 to about 0.96 grams per cubic centimeter and a melt index in the range of about 0.01 to about 100 grams per 10 minutes;
- (b) a crosslinking agent, wherein said crosslinking agent is an organic peroxide, and wherein said organic peroxide, which contains active oxygen, is present in an amount that supplies said composition with an amount of active oxygen, and wherein said amount of active oxygen is in the range of about 50 to about 750 parts per million by weight based on the weight of said copolymer;
- and
- (c) a coagent selected the group consisting of organic compounds that have allyl (CH.sub.2 CH.dbd.CH.sub.2) groups, 1,2 polybutadiene, and mixtures thereof, wherein said coagent is present in said composition in an weight ratio of the coagent to crosslinking agent from about 0.2 to about 4.
1 more element
A process to produce an ethylene copolymer composition said process comprising crosslinking an ethylene copolymer composition that comprises:
- (a) an ethylene copolymer that has been produced with a metallocene catalyst system, wherein said ethylene copolymer comprises ethylene and an alpha-olefin selected from the group consisting of 1-butene, 3-methyl-1-butene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-hexene, 3-ethyl-1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene, and wherein said ethylene copolymer has a density in the range of about 0.85 to about 0.96 grams per cubic centimeter and a melt index in the range of about 0.01 to about 100 grams per 10 minutes;
- (b) a crosslinking agent, wherein said crosslinking agent is an organic peroxide wherein said organic peroxide is present in said composition in an amount in the range of from about 0.05 weight percent to about 0.8 weight percent based on the weight of said copolymer;
- and
- (c) a coagent selected the group consisting of organic compounds that have allyl (CH.sub.2 CH.dbd.CH.sub.2) groups, 1,2 polybutadiene, and mixtures thereof, wherein said coagent is present in said composition in an weight ratio of the coagent to crosslinking agent from about 0.2 to about 4.
1 more element
A process to produce an ethylene copolymer composition said process comprising crosslinking an ethylene copolymer composition that comprises:
- (a) an ethylene copolymer that has been produced with a metallocene catalyst system, wherein said ethylene copolymer comprises ethylene and an alpha-olefin selected from the group consisting of 1-butene, 3-methyl-1-butene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-hexene, 3-ethyl-1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene, and wherein said ethylene copolymer has a density in the range of about 0.85 to about 0.96 grams per cubic centimeter and a melt index in the range of about 0.01 to about 100 grams per 10 minutes;
- (b) a crosslinking agent, wherein said crosslinking agent is an organic peroxide, wherein said organic peroxide, which contains active oxygen, is present in an amount that supplies said composition with an amount of active oxygen, and wherein said amount of active oxygen is in the range of about 50 to about 750 parts per million by weight based on the weight of said copolymer;
- and
- (c) a coagent selected the group consisting of organic compounds that have allyl (CH.sub.2 CH.dbd.CH.sub.2) groups, 1,2 polybutadiene, and mixtures thereof, wherein said coagent is present in said composition in an weight ratio of the coagent to crosslinking agent from about 0.2 to about 4.
1 more element
Dependencies are inferred from the claim text.