US5077334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retarded formulations of thermoplastics and decabromodiphenylethane
Assignee: Albemarle Corp
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Filing: 1991-01-07
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Granted: 1991-12-31
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Expires: 2011-01-07
Abstract
Abstract This invention relates to a process for preparing a product which is predominant in decabromodiphenyl alkane. The process comprises: forming a stirrable reaction mass by adding a solution containing methylene bromide and diphenylalkane to a reaction vessel containing elemental bromine (Br 2 ) and a bromination catalyst; maintaining the reaction mass for a period of time sufficient to achieve perbromination of substantially all of said diphenylalkane; and recovering from the reaction mass the product which is predominant is decabromodiphenyl alkane.
Inventors
- 👤 Saadat Hussain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
A thermoplastic formulation comprising: (a) a flammable macromolecular material; and (b) a flame retardant amount of a decabromodiphenylethane product containing a predominate amount of decabromodiphenylethane and a lesser amount of impurities, said decabromodiphenylethane being produced by the bromination of diphenylethane, and said decabromodiphenylethane product being oven-aged and thereafter having a melting point within the range of from about 344° C. to about 355° C.
Claim 2
Dependent Claim
64 words
A thermoplastic formulation comprising: (a) a flammable macromolecular material; and (b) a flame retardant amount of a decabromodiphenylethane product containing a predominate amount of decabromodiphenylethane and a lesser amount of impurities, said decabromodiphenylethane being produced by the bromination of diphenylethane, and said decabromodiphenylethane product being oven-aged and thereafter having a melting point within the range of from about 344° C. to about 355° C.
Claim 3
Dependent Claim
15 words
The thermoplastic formulation of claim 1 wherein the flammable macromolecular material is high impact polystyrene.
Claim 4
Dependent Claim
14 words
The thermoplastic formulation of claim 1 wherein the flammable macromolecular material is acrylonitrile butadiene-styrene.
Claim 5
Dependent Claim
14 words
The thermoplastic formulation of claim 1 wherein the flammable macromolecular material is a polyolefin.
Claim 6
Dependent Claim
63 words
A thermoplastic formulation comprising: (a) a flammable macromolecular material; and (b) a flame retardant amount of a decabromodiphenylethane product of decabromodiphenylethane and a lesser amount of impurities, said decabromodiphenylethane being produced by the bromination of diphenylethane, and said decabromodiphenylethane product being oven-aged and thereafter exhibiting a weight loss of less than about 20 wt. % at 400° C. when subjected to thermogravimetric analysis.
Claim 7
Dependent Claim
63 words
A thermoplastic formulation comprising: (a) a flammable macromolecular material; and (b) a flame retardant amount of a decabromodiphenylethane product of decabromodiphenylethane and a lesser amount of impurities, said decabromodiphenylethane being produced by the bromination of diphenylethane, and said decabromodiphenylethane product being oven-aged and thereafter exhibiting a weight loss of less than about 20 wt. % at 400° C. when subjected to thermogravimetric analysis.
Claim 8
Dependent Claim
15 words
The thermoplastic formulation of claim 5 wherein the flammable macromolecular material is high impact polystyrene.
Claim 9
Dependent Claim
14 words
The thermoplastic formulation of claim 5 wherein the flammable macromolecular material is acrylonitrile butadiene-styrene.
Claim 10
Dependent Claim
14 words
The thermoplastic formulation of claim 5 wherein the flammable macromolecular material is a polyolefin.
Claim 11
Dependent Claim
75 words
A thermoplastic formulation comprising: (a) a flammable macromolecular material; and (b) a flame retardant amount of a decabromodiphenylethane product containing a predominate amount of decabromodiphenylethane ethane and a lesser amount of impurities, said decabromodiphenylethane being produced by the bromination of diphenylethane, and said deecabromodiphenylethane product being oven-aged and thereafter having the following weight loss profile when subjected to thermogravimetric analysis, ______________________________________
300° C.
350° C.
400° C.
______________________________________
Percent Weight Loss
<0.5 <4.5 <20.0
______________________________________
Claim 12
Dependent Claim
75 words
A thermoplastic formulation comprising: (a) a flammable macromolecular material; and (b) a flame retardant amount of a decabromodiphenylethane product containing a predominate amount of decabromodiphenylethane ethane and a lesser amount of impurities, said decabromodiphenylethane being produced by the bromination of diphenylethane, and said deecabromodiphenylethane product being oven-aged and thereafter having the following weight loss profile when subjected to thermogravimetric analysis, ______________________________________
300° C.
350° C.
400° C.
______________________________________
Percent Weight Loss
<0.5 <4.5 <20.0
______________________________________
Claim 13
Dependent Claim
15 words
The thermoplastic formulation of claim 9 wherein the flammable macromolecular material is high impact polystyrene.
Claim 14
Dependent Claim
14 words
The thermoplastic formulation of claim 9 wherein the flammable macromolecular material is acrylonitrile butadiene-styrene.
Claim 15
Dependent Claim
14 words
The thermoplastic formulation of claim 9 wherein the flammable macromolecular material is a polyolefin.
References Cited (Backward Citations)
JPS5670059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |