US4147741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-drip additive system for fire retardant polypropylene
Assignee: BP Corp North America Inc
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Filing: 1977-02-25
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Granted: 1979-04-03
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Expires: 1997-02-25
Abstract
Abstract Non-dripping, preferably fire retardant polypropylene compositions comprising modified polypropylene component and a cross-linker. Conventional fire retardants can also be present.
Inventors
- 👤 Francis J. Slama
- 👤 Ivor R. Fielding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A composition comprising: (a) a resinous polymer of propylene comprising an alpha, beta-ethylenically unsaturated carboxylic acid modified resinous polymer of propylene; and (b) a polyfunctional aliphatic polyamine cross-linker containing at least two primary amino groups in a concentration of 0.5 to 15 parts by weight cross-linker per 100 parts by weight resinous polymer of propylene, wherein crosslinking occurs when said composition is exposed to fire.
Claim 2
Dependent Claim
65 words
A composition comprising: (a) a resinous polymer of propylene comprising an alpha, beta-ethylenically unsaturated carboxylic acid modified resinous polymer of propylene; and (b) a polyfunctional aliphatic polyamine cross-linker containing at least two primary amino groups in a concentration of 0.5 to 15 parts by weight cross-linker per 100 parts by weight resinous polymer of propylene, wherein crosslinking occurs when said composition is exposed to fire.
Claim 3
Dependent Claim
38 words
The composition of claim 1, wherein a fire retardant is present in a concentration of 0.5 to 50 parts by weight per 100 parts by weight of the total concentration of resinous polymer of propylene and polyfunctional cross-linker.
Claim 4
Dependent Claim
38 words
The composition of claim 1, wherein said resinous polymer of propylene comprises an unmodified resinous polymer of propylene in a concentration of 0.5 to 3 parts by weight per each part by weight modified resinous polymer of propylene.
Claim 5
Dependent Claim
38 words
The composition of claim 2, wherein said resinous polymer of propylene comprises an ummodified resinous polymer of propylene in a concentration of 0.5 to 3 parts by weight per each part by weight modified resinous polymer of propylene.
Claim 6
Dependent Claim
19 words
The composition of claim 4, wherein said unmodified resinous polymer of propylene comprises at least 75% by weight propylene.
Claim 7
Dependent Claim
48 words
The composition of claim 4, wherein said modified resinous polymer of propylene comprises a backbone polymer containing at least 75% by weight propylene and the pendant acid moieties provided by alpha, beta-ethylenically unsaturated carboxylic acid in said polymer comprise from 0.5 to 25% by weight of said polymer.
Claim 8
Dependent Claim
18 words
The composition of claim 6, wherein said fire retardant comprises an antimony compound and a halogenated organic compound.
Claim 9
Dependent Claim
16 words
The composition of claim 6, wherein said alpha, beta-ethylenically unsaturated carboxylic acid moieties are methacrylic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |