Patent US3879752A successfully refreshed from Google Patents.
Patent US4430477A successfully refreshed from Google Patents.
US4430477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene composition
Assignee: JNC Corp
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Filing: 1983-05-26
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Granted: 1984-02-07
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Expires: 2003-05-26
Abstract
Abstract A propylene composition having a notably improved high-impact strength and elongation at break, with a relatively slight reduction in rigidity is provided, which composition is a high-impact polypropylene composition comprising 60 to 95 parts by weight of polypropylene and 40 to 5 parts by weight of a chlorinated polyolefin having styrene graft-polymerized thereon.
Inventors
- 👤 Kohichi Kunimune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:26
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08F; C08F255/00; C08F255/02; C08F255/023; C08L23/26; C08L23/28; C08L23/286; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
A high-impact polypropylene composition comprising 60 to 95 parts by weight of polypropylene and 40 to 5 parts by weight of a chlorinated polyolefin having styrene graft-polymerized thereon (hereinafter abbreviated to Cl.PO-g-St).
Claim 2
Dependent Claim
32 words
A high-impact polypropylene composition comprising 60 to 95 parts by weight of polypropylene and 40 to 5 parts by weight of a chlorinated polyolefin having styrene graft-polymerized thereon (hereinafter abbreviated to Cl.PO-g-St).
Claim 3
Dependent Claim
34 words
A polypropylene composition according to claim 1 wherein the chlorine content of said chlorinated polyolefin is 5 to 50% by weight and the styrene content of said Cl.PO-g-St is 5 to 40% by weight.
Claim 4
Dependent Claim
19 words
A polypropylene composition according to claim 1 wherein said chlorinated polyolefin is a chlorinated polyethylene or a chlorinated EPM.
Claim 5
Dependent Claim
19 words
A polypropylene composition according to claim 2 wherein said chlorinated polyolefin is a chlorinated polyethylene or a chlorinated EPM.
Claim 6
Dependent Claim
68 words
A polypropylene composition according to claim 1 wherein said Cl.PO-g-St is obtained by graft-polymerizing styrene on a chlorinated polyolefin in the presence of a catalyst having as its main component, an organoaluminum compound expressed by the general formula AlR.sub.n X.sub.3-n wherein R represents the same or different alkyl, aryl or aralkyl groups; X represents a halogen atom; and n represents a number of 1, 1.5, 2 or 3.
Claim 7
Dependent Claim
68 words
A polypropylene composition according to claim 2 wherein said Cl.PO-g-St is obtained by graft-polymerizing styrene on a chlorinated polyolefin in the presence of a catalyst having as its main component, an organoaluminum compound expressed by the general formula AlR.sub.n X.sub.3-n wherein R represents the same or different alkyl, aryl or aralkyl groups; X represents a halogen atom; and n represents a number of 1, 1.5, 2 or 3.
Claim 8
Dependent Claim
68 words
A polypropylene composition according to claim 3 wherein said Cl.PO-g-St is obtained by graft-polymerizing styrene on a chlorinated polyolefin in the presence of a catalyst having as its main component, an organoaluminum compound expressed by the general formula AlR.sub.n X.sub.3-n wherein R represents the same or different alkyl, aryl or aralkyl groups; X represents a halogen atom; and n represents a number of 1, 1.5, 2 or 3.
Claim 9
Dependent Claim
68 words
A polypropylene composition according to claim 4 wherein said Cl.PO-g-St is obtained by graft-polymerizing styrene on a chlorinated polyolefin in the presence of a catalyst having as its main component, an organoaluminum compound expressed by the general formula AlR.sub.n X.sub.3-n wherein R represents the same or different alkyl, aryl or aralkyl groups; X represents a halogen atom, and n represents a number of 1, 1.5, 2 or 3.
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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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |