US3883481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-retardant polyolefin compositions
Assignee: Huels AG
•
Filing: 1973-07-27
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Granted: 1975-05-13
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Expires: 1993-07-27
Abstract
Abstract Flame retardants for polyolefins comprising a mixture of (a) 220 percent of brominated organic compounds and (b) 2-9 percent antimony trioxide by weight based on the polyolefin, the brominated organic compounds containing aliphatically as well as aromatically bound bromine atoms in the same molecule, such as Beta -bromoethyl-4-bromobenzene.
Inventors
- 👤 Kurt Kopetz
- 👤 Willi Ziegenbein
- 👤 Anton Schick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/02; C08K5/03; C08K5/10; C08K5/11
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
22 words
A FLAME-RESISTANT POLYOLEFIN COMPOSITION COMPRISING ON A WEIGHT BASIS 100 PARTS OF A POLYOLEFIN, 2-9 PARTS ANTIMONY OCIDE, AND 2-20 PARTS OF
Claim 2
Dependent Claim
22 words
A FLAME-RESISTANT POLYOLEFIN COMPOSITION COMPRISING ON A WEIGHT BASIS 100 PARTS OF A POLYOLEFIN, 2-9 PARTS ANTIMONY OCIDE, AND 2-20 PARTS OF
Claim 3
Dependent Claim
28 words
A composition as defined by claim 1, wherein said compound is 2,2''-bis(4( Beta , gamma -dibromopropoxy)-3,5-dibromophenyl)-propane; 2,2''-bis-( 4( Beta , gamma -dibromobutoxy)-3,5-dibromophenyl)-propane; or -bis-(4( Alpha , Beta -dibromoethoxy)-3,5-dibromophenyl)-methane.
Claim 4
Dependent Claim
17 words
A composition as defined by claim 1 wherein said organic compound is 2,2''-bis(4-( Beta , gamma -dibromopropoxy)-3,5-dibromophenyl)-propane.
Claim 5
Dependent Claim
13 words
A flame-resistant composition as defined by Claim 1 wherein the polyolefin is polypropylene.
Claim 6
Dependent Claim
13 words
A flame-resistant composition as defined by Claim 1, wherein the polyolefin is polybutene.
Claim 7
Dependent Claim
38 words
A FLAME-RESISTANT POLYOLEFIN COMPOSITION COMPRISING ON A WEIGHT BASIS 100 PARTS OF A POLYOLEFIN, 2-9 PARTS ANTIMONY OXIDE, AND 2-20 PARTS OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF: 2,2''-BIS-(4-(B,Y-DIBROMOBUTYYRIC ACID ESTER)-3,5DIBROMOPHENYL!-PROPANE; AND 2,2''-BIS 4-(A,B-DIBROMOPROPIONIC ACID ESTER)-3,5DIBROMOPHENYL!-ETHANE.
Claim 8
Dependent Claim
38 words
A FLAME-RESISTANT POLYOLEFIN COMPOSITION COMPRISING ON A WEIGHT BASIS 100 PARTS OF A POLYOLEFIN, 2-9 PARTS ANTIMONY OXIDE, AND 2-20 PARTS OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF: 2,2''-BIS-(4-(B,Y-DIBROMOBUTYYRIC ACID ESTER)-3,5DIBROMOPHENYL!-PROPANE; AND 2,2''-BIS 4-(A,B-DIBROMOPROPIONIC ACID ESTER)-3,5DIBROMOPHENYL!-ETHANE.
References Cited (Backward Citations)
US2676946A
Cited
US3075944A
Cited
US3419518A
Cited
US3372141A
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US3210315A
Cited
US3275578A
Cited
US3660351A
Cited
US3728304A
Cited
US3808171A
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US3658634A
Cited
US3830766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |