US4499242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic propylene block copolymer containing 1-alkene-propylene-diene copolymer block
Assignee: Stamicarbon BV
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Filing: 1983-01-07
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Granted: 1985-02-12
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Expires: 2003-01-07
Abstract
Abstract The invention relates to a thermoplastic propylene block copolymer comprising one or more substantially crystalline polypropylene blocks and one or more 1-alkene-propylene copolymer blocks, in at least one of which 1-alkene-propylene copolymer blocks diene units are present, and to a process for preparing such a propylene block copolymer. According to the invention, as diene, a cyclic hydrocarbon compound is used wherein at least one double bond forms part of a strained structure, particularly a polycyclic compound with 7 to 20 carbon atoms containing at least one 4- and/or 5-ring, with one or more double bonds in or to the ring. The invention offers the advantage that it is possible to prepare block copolymers which can otherwise not or hardly be made, while at the same time only a small quantity is formed of byproducts which are soluble in the dispersant.
Inventors
- 👤 Jacobus A. Loontjens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
34 words
Thermoplastic propylene block copolymer comprising at least one substantially crystalline polypropylene block, at least one 1-alkene-propylene copolymer block, in at least one of which 1-alkene-propylene-blocks diene units are present which possess the bicyclo[2.2.1.]heptene skeleton.
Claim 2
Dependent Claim
34 words
Thermoplastic propylene block copolymer comprising at least one substantially crystalline polypropylene block, at least one 1-alkene-propylene copolymer block, in at least one of which 1-alkene-propylene-blocks diene units are present which possess the bicyclo[2.2.1.]heptene skeleton.
Claim 3
Dependent Claim
24 words
Block copolymer according to claim 1, wherein the block copolymer is built up of a first polypropylene block and at least one poly-ethylene-propylene-diene block.
Claim 4
Dependent Claim
31 words
Block copolymer according to claim 1, wherein the block copolymer is built up of 10-90 % wt polypropylene block, 10-90 % wt poly-ethylene-propylene-diene copolymer block and 0-50 % wt polyethylene block.
Claim 5
Dependent Claim
21 words
Block copolymer according to claim 1, wherein the diene content in the poly-ethylene-propylene-diene blocks is between 0.1 and 5 % wt.
Claim 6
Dependent Claim
37 words
Block copolymer according to claim 1, wherein, as diene, a polycyclic compound with 1-20 carbon atoms is used containing at least a 4- and/or a 5-ring, with at least one double bond in or to the ring.
Claim 7
Dependent Claim
25 words
Block copolymer according to claim 1, wherein said diene units are chosen from the group consisting of: norbornadiene, dicyclopentadiene, tricyclopentadiene, 5-ethylidenenorbornene-2, 5-methylenenorbornene-2, 5-vinylnorbornene-2 and 5-(2-propenyl)norbornene-2.
Claim 8
Dependent Claim
91 words
Process for the preparation of a thermoplastic propylene block copolymer according to claim 1, wherein propylene is polymerized in at least one first step under conditions in which substantially crystalline polypropylene is formed, wherein in at least one subsequent step a mixture of a 1-alkene and propylene is polymerized, and wherein in at least one of said subsequent 1-alkene-propylene polymerization steps a diene is present, this process being characterized in that, as diene, a cyclic hydrocarbon compound is used wherein at least one double bond forms part of a strained structure.
Claim 9
Dependent Claim
25 words
Process according to claim 7, wherein in said first step a polypropylene block and in said at least one subsequent step polyethylene-propylene-diene blocks are prepared.
Claim 10
Dependent Claim
11 words
Block polymer according to claim 2, further including a polyethylene block.
Claim 11
Dependent Claim
17 words
Process according to claim 7, wherein, in at least one final step, propylene, or ethylene is polymerized.
Claim 12
Dependent Claim
17 words
Process according to claim 8, wherein, in at least one final step, a polyethylene block is prepared.
References Cited (Backward Citations)
GB1019167A
Cited
US3957910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |