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US4075147A
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Polypropylene/pelargonate divalent metal salt
Assignee: BP Corp North America Inc
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Filing: 1976-10-20
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Granted: 1978-02-21
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Expires: 1996-10-20
Abstract
Abstract Composition comprising resinous polymer of propylene and divalent metal salt of pelargonic acid.
Inventors
- 👤 Donald F. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
In the process of producing polypropylene films by extruding a resinous polymer of propylene into an aqueous quench bath the improvement which comprises using a resinous polymer of propylene having at least 75 percent by weight propylene containing a divalent salt of pelargonic acid as a halide scavenger, wherein said divalent metal salt comprises at least one member selected from the group consisting of barium, calcium, strontium, zinc and magnesium.
Claim 2
Dependent Claim
70 words
In the process of producing polypropylene films by extruding a resinous polymer of propylene into an aqueous quench bath the improvement which comprises using a resinous polymer of propylene having at least 75 percent by weight propylene containing a divalent salt of pelargonic acid as a halide scavenger, wherein said divalent metal salt comprises at least one member selected from the group consisting of barium, calcium, strontium, zinc and magnesium.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein said divalent salt is present in a concentration of from about 0.001 to 5 parts by weight per 100 parts by weight resinous polymer of propylene.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein said resinous polymer of propylene is a homopolymer.
Claim 5
Dependent Claim
15 words
The process of claim 2 wherein said divalent salt is an alkaline earth metal salt.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said divalent salt is calcium.
Claim 7
Dependent Claim
11 words
The process of claim 2 wherein said divalent salt is zinc.
Claim 8
Dependent Claim
11 words
The process of claim 2 wherein said divalent salt is magnesium.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein said divalent salt is calcium.
References Cited (Backward Citations)
CA716151A
Cited
CA897843A
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US2985617A
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US2984634A
Cited
US3238163A
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GB982208A
Cited
US3335104A
Cited
US3367926A
Cited
US3622530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |