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Patent US5384369A successfully refreshed from Google Patents.
US5384369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially crosslinked composition comprising polymers of propylene and of ethylene
Assignee: BASF SE
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Filing: 1994-05-06
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Granted: 1995-01-24
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Expires: 2014-05-06
Abstract
Abstract A partially crosslinked polymer composition comprising a) a polymer comprising from 25 to 95% by weight of polypropylene and from 5 to 75% by weight of a propylene copolymer with copolymerized C 2 -C 10 -alk-1-enes, the comonomer content being from 1 to 45% by weight, based on the total polymer, b) a random ethylene copolymer containing from 5 to 20% by weight of copolymerized C 3 -C 10 -alk-1-enes and having a density at room temperature of from 0.89 to 0.925 g/cm 3 , and c) an organosilane compound of the formula (I) A.sub.4-n SiR.sub.n (I) where A are identical or different acrylates or methacrylates or vinyl groups, R are identical or different C 1 -C 8 -alkoxy or C 1 -C 8 -acetoxy groups, and n is 1, 2 or 3, can be obtained by reacting a polymer mixture of the polymer a) and the random ethylene copolymer b) with the organosilane compound c) in the presence of a free-radical initiator and in the presence of a condensation catalyst at from 180° to 280° C., at from 1 to 100 bar and at a mean residence time of the reaction mixture of from 0.2 to 10 minutes.
Inventors
- 👤 Sibylle Brosius
- 👤 Erhard Seiler
- 👤 Harald Schwager
- 👤 Gerhard Kress
- 👤 Lothar Schlemmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:55
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F230/00; C08F230/04; C08F230/08; C08F230/085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
236 words
A partially crosslinked polymer composition having a degree of crosslinking such that the melt flow index at 230° C. and a weight of 2.16 kg is from 0.01 to 10 g/min., said composition comprising a) a polymer which is the result of a multi-step sequential polymerization reaction and comprises from 25 to 95% by weight of polypropylene and from 5 to 75% by weight of propylene copolymer with copolymerized C 2 -C 10 -alk-1-enes, the comonomer content being from 1 to 45% by weight, based on the total polymer, b) a random ethylene copolymer containing from 5 to 20% by weight of copolymerized C 3 -C 10 -alk-1-enes and having a density at room temperature of from 0.89 to 0.925 g/cm 3 , and c) an organosilane compound of the formula I A.sub.4-n SiR.sub.n (I) where A are identical or different acrylates or methacrylates or vinyl groups, R are identical or different C 1 -C 8 -alkoxy or C 1 -C 8 -acetoxy groups, and n is 1, 2 or 3, and obtained by reacting a polymer mixture of the polymer a) and the random ethylene copolymer b) with the organosilane compound c) in the presence of a free-radical initiator and in the presence of a condensation catalyst at from 180° to 280° C., at from 1 to 100 bar and at a mean residence time of the reaction mixture of from 0.2 to 10 minutes.
Claim 2
Dependent Claim
236 words
A partially crosslinked polymer composition having a degree of crosslinking such that the melt flow index at 230° C. and a weight of 2.16 kg is from 0.01 to 10 g/min., said composition comprising a) a polymer which is the result of a multi-step sequential polymerization reaction and comprises from 25 to 95% by weight of polypropylene and from 5 to 75% by weight of propylene copolymer with copolymerized C 2 -C 10 -alk-1-enes, the comonomer content being from 1 to 45% by weight, based on the total polymer, b) a random ethylene copolymer containing from 5 to 20% by weight of copolymerized C 3 -C 10 -alk-1-enes and having a density at room temperature of from 0.89 to 0.925 g/cm 3 , and c) an organosilane compound of the formula I A.sub.4-n SiR.sub.n (I) where A are identical or different acrylates or methacrylates or vinyl groups, R are identical or different C 1 -C 8 -alkoxy or C 1 -C 8 -acetoxy groups, and n is 1, 2 or 3, and obtained by reacting a polymer mixture of the polymer a) and the random ethylene copolymer b) with the organosilane compound c) in the presence of a free-radical initiator and in the presence of a condensation catalyst at from 180° to 280° C., at from 1 to 100 bar and at a mean residence time of the reaction mixture of from 0.2 to 10 minutes.
Claim 3
Dependent Claim
35 words
A partially crosslinked polymer composition as claimed in claim 1, which contains, as a further constituent, d) a random propylene copolymer containing from 1 to 10% by weight of copolymerized C 2 -C 10 -alk-1-enes.
Claim 4
Dependent Claim
31 words
A partially crosslinked polymer composition as claimed in claim 2 which contains, as a further constituent, e) a rubbery polymer material having a Shore A hardness of from 40 to 90.
Claim 5
Dependent Claim
78 words
A partially crosslinked polymer composition as claimed in claim 3, where the polymers a), b), d) and e) are used in the following ratio, based on 100 parts by weight: from 40 to 90 parts by weight of polymer a) from 5 to 60 parts by weight of the random ethylene copolymer b) from 5 to 15 parts by weight of the random propylene copolymer d) from 5 to 25 parts by weight of the rubbery polymer e).
Claim 6
Dependent Claim
37 words
A partially crosslinked polymer composition as claimed in claim 3, where from 0.1 to 4 parts by weight of the organosilane compound c) are used per 100 parts by weight of components a), b), d) and e).
Claim 7
Dependent Claim
26 words
A partially crosslinked polymer composition as claimed in claim 1, in whose organosilane compound c) R is C 1 -C 8 -alkoxy, and n is 3.
Claim 8
Dependent Claim
14 words
A molding produced from a partially crosslinked polymer composition as claimed in claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-23 | 1998-07-25 | 1999-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-23 | 2002-07-25 | 2003-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-23 | 2006-07-25 | 2007-01-24 | $7700.00 | Window Closed / Lapsed |