US3928277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moulding compositions
Assignee: Sumika Polymer Compounds UK Ltd
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Filing: 1974-08-02
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Granted: 1975-12-23
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Expires: 1994-08-02
Abstract
Abstract Fire resistant compositions comprising a thermoplastic polymer, chrysotile asbestos, and an additive mixture of an antimony compound and a halogenated hydrocarbon.
Inventors
- 👤 George L Wicker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:32
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08K13/00; C08K13/04; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A FIRE RESISTANT THERMOPLASTIC COMPOSITION COMPRISING A. FROM 40 TO 90 PECENT BY WEIGHT OF A THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE, COPOLYMERS OF PROPYLENE, POLYETHYLENE, POLYSTYRENE, STYRENE/ACRYLONITRILE COPOLYMERS, POLYAMIDES AND MIXTURES THEREOF; AND B. A FIRE-RETARDANT ADDITIVE CONSISTING ESSENTIALLY OF I. FROM 5 TO 40 PERCENT BY WEIGHT OF CHRYSOTILE ASBESTOS FIBRES; AND II. FROM 2.5 TO 20 PERCENT BY WEIGHT OF AN ADDITIVE MIXTURE OF ANTIMONY TRIOXIDE AND AT LEAST ONE HALOGENATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF DECABROMODIPHENYL AND THE DOUBLE DIELS-ALDER CONDENSATION PRODUCT OF HEXACHOROCYCLOPENTADIENE AND CYCLOOCTADIENE.
Claim 2
Dependent Claim
95 words
A FIRE RESISTANT THERMOPLASTIC COMPOSITION COMPRISING A. FROM 40 TO 90 PECENT BY WEIGHT OF A THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE, COPOLYMERS OF PROPYLENE, POLYETHYLENE, POLYSTYRENE, STYRENE/ACRYLONITRILE COPOLYMERS, POLYAMIDES AND MIXTURES THEREOF; AND B. A FIRE-RETARDANT ADDITIVE CONSISTING ESSENTIALLY OF I. FROM 5 TO 40 PERCENT BY WEIGHT OF CHRYSOTILE ASBESTOS FIBRES; AND II. FROM 2.5 TO 20 PERCENT BY WEIGHT OF AN ADDITIVE MIXTURE OF ANTIMONY TRIOXIDE AND AT LEAST ONE HALOGENATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF DECABROMODIPHENYL AND THE DOUBLE DIELS-ALDER CONDENSATION PRODUCT OF HEXACHOROCYCLOPENTADIENE AND CYCLOOCTADIENE.
Claim 3
Dependent Claim
31 words
The fire-resistant composition of claim 1 containing from 20 to 40 percent by weight of the chrysotile asbestos fibres and from 5 to 10 percent by weight of said additive mixture.
Claim 4
Dependent Claim
46 words
The fire-resistant composition of claim 1 wherein the additive mixture consists of at least 2.5 percent by weight, based on the total weight of the composition, of a mixture of 3 parts by weight of a halogenated hydrocarbon and one part by weight of antimony trioxide.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |