US4761449A
Expired / Lapsed
US
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Flame retardant compositions
Assignee: Shell USA Inc
•
Filing: 1987-10-22
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Granted: 1988-08-02
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Expires: 2007-10-22
Abstract
Abstract Flame retardant compositions comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a minor quantity, relative to the polymer, of an alkaline earth metal carbonate.
Inventors
- 👤 Robert G. Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:23
CPC Classifications
C; C08; C08L; C08L23/00; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
The flame retardant polymer composition comprising a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a flame retarding quantity of an alkaline earth metal carbonate.
Claim 2
Dependent Claim
31 words
The flame retardant polymer composition comprising a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a flame retarding quantity of an alkaline earth metal carbonate.
Claim 3
Dependent Claim
47 words
The composition of claim 1 wherein the polymer is a linear alternating polymer of carbon monoxide, ethylene and propylene incorporating from about 2% by weight to about 30% by weight, based on total composition, of an alkaline earth metal carbonate selected from magnesium carbonate and calcium carbonate.
Claim 4
Dependent Claim
64 words
The polymer composition comprising a linear alternating polymer of the formula ##STR1## wherein B is the moiety of an ethylenically unsaturated α-olefin of at least 3 carbon atoms polymerized through the ethylenic unsaturation, the ratio of y:x is no more than about 0.5, and a quantity of from about 2% by weight to about 30% by weight based on total composition of calcium carbonate.
Claim 5
Dependent Claim
64 words
The polymer composition comprising a linear alternating polymer of the formula ##STR1## wherein B is the moiety of an ethylenically unsaturated α-olefin of at least 3 carbon atoms polymerized through the ethylenic unsaturation, the ratio of y:x is no more than about 0.5, and a quantity of from about 2% by weight to about 30% by weight based on total composition of calcium carbonate.
Claim 6
Dependent Claim
22 words
The composition of claim 3 wherein the α-olefin is propylene and the ratio of y:x is from about 0.01 to about 0.1.
Claim 7
Dependent Claim
7 words
The composition of claim 3 wherein y=0.
Claim 8
Dependent Claim
26 words
The composition of claim 4 wherein the quantity of calcium carbonate is from about 5% by weight to about 15% by weight, based on total composition.
Claim 9
Dependent Claim
14 words
As an article of manufacture, a molded article comprising the composition of claim 1.
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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) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |