US4395519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Physically blended propylene polymer composition
Assignee: Mitsui Chemicals Inc
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Filing: 1980-10-14
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Granted: 1983-07-26
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Expires: 2000-10-14
Abstract
Abstract A physically blended propylene polymer composition composed of (A) 100 parts by weight of crystalline polypropylene containing 0 to 10 mole % of ethylene and/or another alpha -olefin, (B) 1 to 30 parts by weight of a propylene/ethylene random copolymer composed of 30 to 85 mole % of propylene, said copolymer containing 0 to 10 mole % of a diene component and having (i) a micro-isotacticity of at least 0.8 and (ii) a boiling n-cyclohexane insolubles content of 0 to 10% by weight, and (C) 0 to 30 parts by weight of polyethylene containing 0 to 15 mole % of an alpha -olefin, said components (A) and (B) having been physically mixed with each other.
Inventors
- 👤 Syuji Minami
- 👤 Norio Kashiwa
- 👤 Akifumi Kato
- 👤 Junichi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/16; Y; Y10; Y10S; Y10S2/00; Y10S2/912; Y10S2/918
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
A physically blended propylene polymer composition comprising (A) 100 parts by weight of crystalline polypropylene containing 0 to 10 mole% of a member selected from the group consisting of ethylene, another α-olefin, and a mixture thereof, (B) 1 to 30 parts by weight of a propylene/ethylene random copolymer composed of 30 to 85 mole% of propylene, said copolymer containing 0 to 10 mole% of a diene component and having (i) a micro-isotacticity of at least 0.8 and (ii) a boiling n-cyclohexane insolubles content of 0 to 10% by weight, said random copolymer being prepared by using a catalyst comprising a carrier-supported solid titanium catalyst component containing magnesium, halogen, titanium and an electron donor, and an organoaluminum compound catalyst component, and (C) 0 to 30 parts by weight of polyethylene containing 0 to 15 mole% of an α-olefin, said components (A) and (B) having been physically mixed with each other.
Claim 2
Dependent Claim
149 words
A physically blended propylene polymer composition comprising (A) 100 parts by weight of crystalline polypropylene containing 0 to 10 mole% of a member selected from the group consisting of ethylene, another α-olefin, and a mixture thereof, (B) 1 to 30 parts by weight of a propylene/ethylene random copolymer composed of 30 to 85 mole% of propylene, said copolymer containing 0 to 10 mole% of a diene component and having (i) a micro-isotacticity of at least 0.8 and (ii) a boiling n-cyclohexane insolubles content of 0 to 10% by weight, said random copolymer being prepared by using a catalyst comprising a carrier-supported solid titanium catalyst component containing magnesium, halogen, titanium and an electron donor, and an organoaluminum compound catalyst component, and (C) 0 to 30 parts by weight of polyethylene containing 0 to 15 mole% of an α-olefin, said components (A) and (B) having been physically mixed with each other.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein said propylene/ethylene random copolymer (B) has an intrinsic viscosity, measured in decalin at 135° C. of 1 to 15.
Claim 4
Dependent Claim
32 words
The composition of claim 1 wherein said propylene/ethylene random copolymer (B) has (i) a micro-isotacticity of at least 0.9 and (ii) a boiling n-cyclohexane insolubles content of 0 to 5% by weight.
Claim 5
Dependent Claim
46 words
The composition of claim 1 wherein the amount of said propylene/ethylene random copolymer (B) and the amount of said polyethylene (C) are 3 to 20 parts by weight and 0 to 15 parts by weight, respectively, per 100 parts by weight of said crystalline polypropylene (A).
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein said polyethylene (C) has been chemically mixed with said crystalline polypropylene (A).
References Cited (Backward Citations)
US4059651A
Cited
US3998911A
Cited
US4087486A
Cited
US4078131A
Cited
US4128606A
Cited
US4087485A
Cited
US4140732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |