Patent US4297445A successfully refreshed from Google Patents.
US4297445A
Expired / Lapsed
US
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Continuous production of olefin block copolymers
Assignee: Phillips Petroleum Co
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Filing: 1979-09-28
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Granted: 1981-10-27
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Expires: 1999-09-28
Abstract
Abstract A method for continuous production of block copolymers having a block of propylene homopolymer and blocks of polymer of ethylene. The block copolymers produced thereby. In a first stage a first reaction mixture containing a polymer of ethylene is produced with continuous transfer of a portion of this reaction mixture along with propylene monomer and a catalyst modifier into a second stage in which a block copolymer having a block of propylene homopolymer and blocks of polymer of ethylene is produced. In preferred embodiments the polymer of ethylene is ethylene homopolymer and/or ethylene-propylene random copolymer.
Inventors
- 👤 James N. Short
- 👤 Donald D. Norwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:56
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F297/083
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
223 words
A method for the continuous production of block copolymer comprising: (a) producing in a first zone a first reaction mixture comprising an ethylene homopolymer by reacting ethylene monomer in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 90° to about 200° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said first zone for a time in the range of about 5 to about 20 minutes; (b) continuously introducing a portion of said first reaction mixture, propylene monomer, and a catalyst modifier to a second zone; and (c) producing in said second zone block copolymer comprising blocks of propylene homopolymer and random ethylene-propylene copolymer by reaction in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 100° to about 180° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said second zone for a time in the range of about 30 to about 110 minutes to provide a total copolymer composition of about 10 to about 30 percent by weight of polymers of ethylene and about 70 to about 90 percent by weight of propylene homopolymer.
Claim 2
Independent Claim
223 words
A method for the continuous production of block copolymer comprising: (a) producing in a first zone a first reaction mixture comprising an ethylene homopolymer by reacting ethylene monomer in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 90° to about 200° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said first zone for a time in the range of about 5 to about 20 minutes; (b) continuously introducing a portion of said first reaction mixture, propylene monomer, and a catalyst modifier to a second zone; and (c) producing in said second zone block copolymer comprising blocks of propylene homopolymer and random ethylene-propylene copolymer by reaction in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 100° to about 180° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said second zone for a time in the range of about 30 to about 110 minutes to provide a total copolymer composition of about 10 to about 30 percent by weight of polymers of ethylene and about 70 to about 90 percent by weight of propylene homopolymer.
Claim 3
Independent Claim
222 words
A method for the continuous production of block copolymer comprising: (a) producing in a first zone a first reaction mixture comprising ethylene-propylene copolymer by reacting ethylene propylene monomer in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 90° to about 200° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said first zone for a time in the range of about 5 to about 20 minutes; (b) continuously introducing a portion of said first reaction mixture, propylene monomer, and a catalyst modifier to a second zone; and (c) producing in said second zone a block copolymer comprising blocks of propylene homopolymer and ethylene-propylene copolymer by reaction in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 100° to about 180° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said second zone for a time in the range of about 30 to about 110 minutes to provide a total copolymer composition of about 10 to about 30 percent by weight polymers of ethylene and about 70 to about 90 percent by weight of propylene homopolymer.
Claim 4
Independent Claim
222 words
A method for the continuous production of block copolymer comprising: (a) producing in a first zone a first reaction mixture comprising ethylene-propylene copolymer by reacting ethylene propylene monomer in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 90° to about 200° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said first zone for a time in the range of about 5 to about 20 minutes; (b) continuously introducing a portion of said first reaction mixture, propylene monomer, and a catalyst modifier to a second zone; and (c) producing in said second zone a block copolymer comprising blocks of propylene homopolymer and ethylene-propylene copolymer by reaction in the presence of a catalyst system comprising TiCl 4 , MgCl 2 , and an organo metallic compound at a temperature in the range of about 100° to about 180° F. and a pressure above about 500 psig sufficient to maintain non-boiling liquid conditions in said second zone for a time in the range of about 30 to about 110 minutes to provide a total copolymer composition of about 10 to about 30 percent by weight polymers of ethylene and about 70 to about 90 percent by weight of propylene homopolymer.
Claim 5
Dependent Claim
31 words
A method of claim 1 or 2 wherein said catalyst system in the first zone comprises at least one of the compounds chosen from a Lewis base, durene and aromatic hydrocarbon.
Claim 6
Dependent Claim
31 words
A method of claim 1 or 2 wherein said catalyst system in the second zone comprises at least one of the compounds chosen from Lewis base, durene, and an aromatic hydrocarbon.
Claim 7
Dependent Claim
22 words
A method of claim 1 or 2 wherein said catalyst system is intensively mixed for a time sufficient to provide polymerization activation.
Claim 8
Dependent Claim
22 words
A method of claim 1 or 2 wherein said first zone and said second zone each comprise a liquid full loop reactor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |