US4005248A
Expired / Lapsed
US
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Smoke-inhibited polymer compositions
Assignee: Bridgestone Firestone Inc
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Filing: 1975-06-10
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Granted: 1977-01-25
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Expires: 1995-06-10
Abstract
Abstract The evolution of smoke from the combustion of organic polymers which contain aromatic moieties, especially polymers of styrene, with and without other monomers, is reduced materially by forming a complex of the polymer and chromium carbonyl.
Inventors
- 👤 David Francis Lawson
- 👤 Jung Wong Kang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
C; C08; C08G; C08G85/00; C08G85/004; C08C; C08C19/00; C08C19/26; C08F; C08F8/00; C08F8/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
Smoke-inhibited combustible composition containing polymeric materials having a backbone or network containing repeating aromatic units, either incorporated in the backbone or network or pendant to the backbone or network, at least a portion of said aromatic units being complexed with chromium tricarbonyl so as to form π-phenyl chromium tricarbonyl units, in which composition the chromium content is chemically bonded to said aromatic units, and is 0.4 to 10 percent of the weight of the polymeric material, as determined by IR analysis.
Claim 2
Dependent Claim
81 words
Smoke-inhibited combustible composition containing polymeric materials having a backbone or network containing repeating aromatic units, either incorporated in the backbone or network or pendant to the backbone or network, at least a portion of said aromatic units being complexed with chromium tricarbonyl so as to form π-phenyl chromium tricarbonyl units, in which composition the chromium content is chemically bonded to said aromatic units, and is 0.4 to 10 percent of the weight of the polymeric material, as determined by IR analysis.
Claim 3
Dependent Claim
14 words
The composition of claim 1 in which the complexed repeating units are styrene units.
Claim 4
Dependent Claim
21 words
The composition of claim 1 which includes 40 to 100 parts of alumina trihydrate per 100 parts of the polymeric material.
Claim 5
Dependent Claim
13 words
The composition of claim 1 in which the polymeric material is butadiene-styrene copolymer.
Claim 6
Dependent Claim
27 words
The composition of claim 4 in which the copolymer contains about 40 percent of styrene and about 90 percent of the butadiene units are in the 1,2-configuration.
Claim 7
Dependent Claim
26 words
The composition of claim 1 which includes as filler, silica, glass fiber or glass fabric, and an agent to bond the filler to the polymeric material.
Claim 8
Dependent Claim
18 words
The composition of claim 1 which includes a lubricant which is a metal derivative of a fatty acid.
Claim 9
Dependent Claim
22 words
The composition of claim 1 in which the chromium tricarbonyl complex is chemically bound to the backbone or network of the polymer.
Claim 10
Dependent Claim
25 words
The composition of claim 1 in which the chromium tricarbonyl complex is incorporated by reaction of an uncomplexed polymer with an additive containing the complex.
References Cited (Backward Citations)
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US3637543A
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US3746664A
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US3729436A
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US3725319A
Cited
US3766157A
Cited
US3903028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |