Impact copolymers
First Claim
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1. A continuous process to prepare olefin impact copolymers having a melting point of at least 145°
- C. comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor to produce a low crystallinity olefin polymer in the presence of the semi-crystalline polymer, wherein a fluorinated hydrocarbon is present in a polymerization medium of the first reactor, the second reactor or both reactors.
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Abstract
This invention relates to a continuous process to prepare olefin impact copolymers comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor where a low crystallinity olefin polymer is produced in the presence of the semi-crystalline polymer, where a fluorinated hydrocarbon is present in the polymerization medium of the first reactor, the second reactor or both reactors.
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Citations
44 Claims
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1. A continuous process to prepare olefin impact copolymers having a melting point of at least 145°
- C. comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor to produce a low crystallinity olefin polymer in the presence of the semi-crystalline polymer, wherein a fluorinated hydrocarbon is present in a polymerization medium of the first reactor, the second reactor or both reactors.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22)
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19. A continuous process to prepare olefin impact copolymers comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor to produce a low crystallinity olefin polymer in the presence of the semi-crystalline polymer, wherein a fluorinated hydrocarbon is present in a polymerization medium of the first reactor, the second reactor or both reactors, wherein the first or second reactor is a gas phase reactor.
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21. A continuous process to prepare olefin impact copolymers comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor to produce a low crystallinity olefin polymer in the presence of the semi-crystalline polymer, wherein a fluorinated hydrocarbon is present in a polymerization medium of the first reactor, the second reactor or both reactors, wherein the first or second reactor is a solution phase reactor.
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23. A continuous process to prepare olefin impact copolymers comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor contents to a second reactor to produce a low crystallinity olefin polymer in the presence of the semi-crystalline polymer, wherein a fluorinated hydrocarbon is present in a polymerization medium of the first reactor, the second reactor or both reactors, wherein the reactors operate in different phases.
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24. A continuous process to prepare impact copolymers having a melting point of at least 145°
- C. comprising producing a semi-crystalline polymer in a first reaction zone and then transferring the semi-crystalline polymer to a second reaction zone to produce a low crystallinity polymer in the presence of the semi-crystalline polymer, wherein a fluorinated hydrocarbon is present in a polymerization medium of the first reaction zone, the second reaction zone or both reaction zones.
- View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
Specification