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US3911052A
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Block copolymers of ethylene and propylene and process for their manufacture
Assignee: Dart Industries Inc
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Filing: 1973-03-12
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Granted: 1975-10-07
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Expires: 1993-03-12
Abstract
Abstract Novel compositions of block copolymers of ethylene and propylene and processes therefor which compositions exhibit improved oriented film shrink properties, improved processability and improved uniformity in gauge when extruded and oriented into films and which exhibit improved impact strenght, improved low temperature brittleness properties and improved parison stability when molded as compared to prior art processes. The compositions comprise: A. 60% TO 96% BY WEIGHT OF A PREPOLYMER BLOCK OF A RANDOM COPOLYMER OF (1) 90 TO 99 MOLE PERCENT OF PROPYLENE AND 1 TO 10 MOLE PERCENT OF ETHYLENE, AND B. 4% TO 40% BY WEIGHT OF A POST BLOCK OF A RANDOM COPOLYMER OF (1) 70 TO 99 MOLE PERCENT OF PROPYLENE AND 1 TO 30 MOLE PERCENT OF ETHYLENE.
Inventors
- 👤 Eugene G Castagna
- 👤 Peter J Perron
- 👤 Ronald I Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:10
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F297/083
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
9 words
A PROCESS FOR PREPARING AN ETHYLENE-PROPYLENE BLOCK COMPOSITION COMPRISING:
Claim 2
Dependent Claim
9 words
A PROCESS FOR PREPARING AN ETHYLENE-PROPYLENE BLOCK COMPOSITION COMPRISING:
Claim 3
Dependent Claim
103 words
COPOLYMERIZING ETHYLENE AND PROPYLENE IN THE PRESENCE OF HYDROGEN AND A CATALYTIC AMOUNT OF A CATALYST FORMED BY ADMIXING A SUBHALIDE OF A METAL SELECTED FROM THE METALS OF GROUPS IVA, VA AND VIA OF THE PERIODIC TABLE ACORDING TO MENDELEEF AND ALUMINUM COMPOUND CONTAINING AT LEAST ONE CARBON TO METAL BOND AND IN A SLURRY TO A SOLIDS CONTENT OF 5 TO 60% BY WEIGHT TO FORMED A RANDOM COPOLYMER PREBLOCK COMPRISING 1 TO 10% ON A MOLAR BASIS OF ETHYLENE DERIVED UNITS AND WHICH HAS AN AVERAGE MOLECUALR WEIGHT OF FROM 50.000 TO 500,000 AND EXHIBITS A CRYSTALLINE STRUCTURE UNDER X-RAYS,
Claim 4
Dependent Claim
103 words
COPOLYMERIZING ETHYLENE AND PROPYLENE IN THE PRESENCE OF HYDROGEN AND A CATALYTIC AMOUNT OF A CATALYST FORMED BY ADMIXING A SUBHALIDE OF A METAL SELECTED FROM THE METALS OF GROUPS IVA, VA AND VIA OF THE PERIODIC TABLE ACORDING TO MENDELEEF AND ALUMINUM COMPOUND CONTAINING AT LEAST ONE CARBON TO METAL BOND AND IN A SLURRY TO A SOLIDS CONTENT OF 5 TO 60% BY WEIGHT TO FORMED A RANDOM COPOLYMER PREBLOCK COMPRISING 1 TO 10% ON A MOLAR BASIS OF ETHYLENE DERIVED UNITS AND WHICH HAS AN AVERAGE MOLECUALR WEIGHT OF FROM 50.000 TO 500,000 AND EXHIBITS A CRYSTALLINE STRUCTURE UNDER X-RAYS,
Claim 5
Dependent Claim
17 words
REMAINING ANY VOLATILES PERCENT WITH SAID PREBLOCK TO A LEVEL OF NO MORE THAN 5% BY WEIGHT,
Claim 6
Dependent Claim
17 words
REMAINING ANY VOLATILES PERCENT WITH SAID PREBLOCK TO A LEVEL OF NO MORE THAN 5% BY WEIGHT,
Claim 7
Dependent Claim
17 words
removing any volatiles present with said preblock to a level of no more than 5% by weight;
Claim 8
Dependent Claim
17 words
removing any volatiles present with said preblock to a level of no more than 5% by weight;
Claim 9
Dependent Claim
21 words
A process according to claim 1 wherein said postblock constitutes 4 to 16% by weight of the total block copolymer composition.
Claim 10
Dependent Claim
74 words
4% to 40% by weight of a post-segment consisting of a random copolymer of 70 to 99 mole percent of propylene derived units and from 1 to 30 mole percent of ethylene derived units, said post segment being formed in the absence of hydrogen in a vapor phase reaction zone subsequent to said first reaction zone and having an average molecular weight of from 20,000 to 2,000,000 and exhibiting a crystalline structure under X-rays.
Claim 11
Dependent Claim
74 words
4% to 40% by weight of a post-segment consisting of a random copolymer of 70 to 99 mole percent of propylene derived units and from 1 to 30 mole percent of ethylene derived units, said post segment being formed in the absence of hydrogen in a vapor phase reaction zone subsequent to said first reaction zone and having an average molecular weight of from 20,000 to 2,000,000 and exhibiting a crystalline structure under X-rays.
Claim 12
Dependent Claim
74 words
4% to 16% by weight of a postsegment consisting of a random copolymer of 85 to 98.5 mole percent of propylene derived units and from 1.5 to 15 mole percent of ethylene derived units, said post segment being formed in the absence of hydrogen in a vapor phase reaction zone subsequent to said first reaction zone and having an average molecular weight of from 20,000 to 2,000,000 and exhibiting a crystalline structure under X-rays.
Claim 13
Dependent Claim
74 words
4% to 16% by weight of a postsegment consisting of a random copolymer of 85 to 98.5 mole percent of propylene derived units and from 1.5 to 15 mole percent of ethylene derived units, said post segment being formed in the absence of hydrogen in a vapor phase reaction zone subsequent to said first reaction zone and having an average molecular weight of from 20,000 to 2,000,000 and exhibiting a crystalline structure under X-rays.
Claim 14
Dependent Claim
37 words
A process according to claim 1 wherein the subhalide of a selected metal is titanium trichloride or titanium trichloride cocrystallized with aluminum chloride according to the formula nTiCl3.AlCl3 wherein n is an number of 1 to 5.
Claim 15
Dependent Claim
15 words
transferring said preblock while it still contains active catalyst to a continuously agitated reaction zone;
Claim 16
Dependent Claim
15 words
transferring said preblock while it still contains active catalyst to a continuously agitated reaction zone;
Claim 17
Dependent Claim
15 words
TRANSFERRING SAID PREBLOCK WHILE IT STILL CONTAINS ACTIVE CATALYST TO A CONTINUOUSLY AGITATED REACTION ZONE,
Claim 18
Dependent Claim
15 words
TRANSFERRING SAID PREBLOCK WHILE IT STILL CONTAINS ACTIVE CATALYST TO A CONTINUOUSLY AGITATED REACTION ZONE,
Claim 19
Dependent Claim
9 words
INTRODUCING ETHYLENE AND PROPYLENE TO SAID REACTION ZONE, AND
Claim 20
Dependent Claim
9 words
INTRODUCING ETHYLENE AND PROPYLENE TO SAID REACTION ZONE, AND
Claim 21
Dependent Claim
9 words
introducing ethylene and propylene to said reaction zone; and
Claim 22
Dependent Claim
9 words
introducing ethylene and propylene to said reaction zone; and
Claim 23
Dependent Claim
39 words
A process according to claim 1 wherein the aluminum compound is a trialkyl aluminum wherein the alkyl groups have 1 to 10 carbon atoms or a dialkyl aluminum monochloride wherein the alkyl groups have 1 to 10 carbon atoms.
Claim 24
Dependent Claim
6 words
An ethylene-propylene block copolymer composition comprising:
Claim 25
Dependent Claim
6 words
An ethylene-propylene block copolymer composition comprising:
Claim 26
Dependent Claim
67 words
block polymerizing said ethylene and propylene of step (4) onto said preblock in the vapor phase to form a random copolymer postblock comprising 1 to 30% on a molar basis of ethylene derived units, said post block having an average molecular weight of from 20,000 to 2,000,000 and exhibiting crystalline structure under X-rays and constituting 4 to 40% by weight of the total ethylene-propylene block copolymer composition.
Claim 27
Dependent Claim
67 words
block polymerizing said ethylene and propylene of step (4) onto said preblock in the vapor phase to form a random copolymer postblock comprising 1 to 30% on a molar basis of ethylene derived units, said post block having an average molecular weight of from 20,000 to 2,000,000 and exhibiting crystalline structure under X-rays and constituting 4 to 40% by weight of the total ethylene-propylene block copolymer composition.
Claim 28
Dependent Claim
67 words
BLOCK POLYMERIZING SAID ETHYLENE AND PROPYLENE OF STEP (4) ONTO SAID PREBLOCK IN THE VAPOUR PHASE TO FORM A RANDOM COPOLYMER POSTBLOCK COMPRISING 1 TO 30% ON A MOLAR BASIS OF ETHYLENE DERIVED UNITS, SAID POST BLOCK HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 20,000 TO 2,000,000 AND EXHIBITING CRYSTALLINE STRUCTURE UNDER XRAYS AND CONSTITUTING 4 TO 40% BY WEIGHT OF THE TOTAL ETHYLENE-PROPYLENE BLOCK COPOLYMER COMPOSITION.
Claim 29
Dependent Claim
67 words
BLOCK POLYMERIZING SAID ETHYLENE AND PROPYLENE OF STEP (4) ONTO SAID PREBLOCK IN THE VAPOUR PHASE TO FORM A RANDOM COPOLYMER POSTBLOCK COMPRISING 1 TO 30% ON A MOLAR BASIS OF ETHYLENE DERIVED UNITS, SAID POST BLOCK HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 20,000 TO 2,000,000 AND EXHIBITING CRYSTALLINE STRUCTURE UNDER XRAYS AND CONSTITUTING 4 TO 40% BY WEIGHT OF THE TOTAL ETHYLENE-PROPYLENE BLOCK COPOLYMER COMPOSITION.
Claim 30
Dependent Claim
22 words
An ethylene-propylene block copolymer composition according to claim 5 wherein the post-segment constitutes 4 to 16% by weight of the total composition.
Claim 31
Dependent Claim
6 words
An ethylene-propylene block copolymer composition comprising:
Claim 32
Dependent Claim
6 words
An ethylene-propylene block copolymer composition comprising:
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |