US3859387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization process
Assignee: Phillips Petroleum Co
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Filing: 1974-01-14
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Granted: 1975-01-07
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Expires: 1994-01-14
Abstract
Abstract In a propylene/ethylene batch copolymerization process to produce a high impact block copolymer utilizing a dual component catalyst system, comprising an organometal compound and a metal halide, the ratio of the organo-metal compound to the metal salt is varied during homopolymerization of the propylene. Catalyst activity is thus modulated permitting optimum use of reactor cooling capacity and greater yield of copolymer per batch.
Inventors
- 👤 Robert J Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:46
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F297/083
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
226 words
IN A PROCESS FOR THE COPOLYMERIZATION OF PROPYLENE AND ETHYLENE MONOMERS COMPRISING A FIRST STEP IN WHICH PROPYLENE IS HOMOPOLYMERIZED IN THE PRESENCE OF LIQUID PROPYLENE USING A TWO-COMPONENT CATALYST FORMED BY MIXING MATERIALS COMPRISING (A) A COMPOUND HAVING THE FORMULA RNMXM, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKLY, CYCLOALKYL, AND ARYL RADICALS, X IS HYDROGEN OR A HALIDE, M IS SELECTED FROM THE GROUP CONSISTING OF AL, GA, IN, AND TI, N IS A NUMBER FROM 1 TO 3 INCLUSIVE, M IS A NUMBER FROM 0 TO 2 INCLUSIVE, AND THE SUM OF M AND N IS EQUAL TO THE VALENCE OF THE METAL M, AND (B) A HALIDE OF A MATAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUP IV-A, IV-B, V-B, AND VIII, AND A SECOND STEP IN WHICH ETHYLENE IS POLYMERIZED IN THE PRESENCE OF SAID LIQUID PROPLYENE, AND POLYMER PRODUCED IN SAID FIRST STEP AND IN THE PRESENCE OF SAID CATALYST, THE IMPROVEMENT WHICH COMPRISES COMMENCING SAID HOMOPOLYMERIZATION USING A CATALYST COMPONENT MOLAR RATIO OF A TO BE IN THE RANGE OF 1:1 TO 1.3:3, AND AFTER APPROXIMATELY 15 TO 80 WEIGHT PERCENT OF THE DESIRED TOTAL AMOUNT OF SAID HOMOPOLYMER IS PRODUCED, ADDING ADDITIONAL COMPONENT A SO AS TO INCREASE THE RATIO OF A TO B TO A VALUE IN THE RANGE OF 1:31 TO 4:1
Claim 2
Dependent Claim
226 words
IN A PROCESS FOR THE COPOLYMERIZATION OF PROPYLENE AND ETHYLENE MONOMERS COMPRISING A FIRST STEP IN WHICH PROPYLENE IS HOMOPOLYMERIZED IN THE PRESENCE OF LIQUID PROPYLENE USING A TWO-COMPONENT CATALYST FORMED BY MIXING MATERIALS COMPRISING (A) A COMPOUND HAVING THE FORMULA RNMXM, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKLY, CYCLOALKYL, AND ARYL RADICALS, X IS HYDROGEN OR A HALIDE, M IS SELECTED FROM THE GROUP CONSISTING OF AL, GA, IN, AND TI, N IS A NUMBER FROM 1 TO 3 INCLUSIVE, M IS A NUMBER FROM 0 TO 2 INCLUSIVE, AND THE SUM OF M AND N IS EQUAL TO THE VALENCE OF THE METAL M, AND (B) A HALIDE OF A MATAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUP IV-A, IV-B, V-B, AND VIII, AND A SECOND STEP IN WHICH ETHYLENE IS POLYMERIZED IN THE PRESENCE OF SAID LIQUID PROPLYENE, AND POLYMER PRODUCED IN SAID FIRST STEP AND IN THE PRESENCE OF SAID CATALYST, THE IMPROVEMENT WHICH COMPRISES COMMENCING SAID HOMOPOLYMERIZATION USING A CATALYST COMPONENT MOLAR RATIO OF A TO BE IN THE RANGE OF 1:1 TO 1.3:3, AND AFTER APPROXIMATELY 15 TO 80 WEIGHT PERCENT OF THE DESIRED TOTAL AMOUNT OF SAID HOMOPOLYMER IS PRODUCED, ADDING ADDITIONAL COMPONENT A SO AS TO INCREASE THE RATIO OF A TO B TO A VALUE IN THE RANGE OF 1:31 TO 4:1
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the amount of said catalyst component B is in the range of 1.5 X 10 4 to 10 X 10 4 part/part of said propylene, by weight.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein there is additionally present in at least one of said polymerization steps a catalyst adjuvant.
Claim 5
Dependent Claim
19 words
The process of claim 3 wherein said adjuvant is selected from the group consisting of hydrogen and triphenyl phosphite.
Claim 6
Dependent Claim
27 words
The process of claim 4 wherein said adjuvant is hydrogen, said hydrogen being present in an amount ranging from 0.03 to 1.0 mol percent of said monomers.
Claim 7
Dependent Claim
30 words
The process of claim 4 wherein saId adjuvant is triphenyl phosphite, said adjuvant being present in an amount ranging from 1 to 10 mol percent of said catalyst component B.
Claim 8
Dependent Claim
42 words
The process of claim 1 wherein said catalyst component A is diethylaluminum chloride and said component B is a complex having the approximate formula 3TiCl3.AlCl3, said component B having been prepared by the reduction of titanium tetrachloride in the presence of aluminum.
Claim 9
Dependent Claim
32 words
The process of claim 1 wherein additional propylene is added to the reaction zone during said polymerization process in amount sufficient to maintain a constant reaction mixture volume in said reaction zone.
Claim 10
Dependent Claim
21 words
The process of claim 1 wherein said homopolymerization is carried out at a temperature in the range of 80* to 150*F.
Claim 11
Dependent Claim
21 words
The process of claim 1 wherein said copolymerization is carried out at a temperature in the range of -50* to 75*F.
Claim 12
Dependent Claim
21 words
The process of claim 9 wherein said homopolymerization is carried out at a temperature in the range of 120* to 140*F.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |