US4010219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyester composition
Assignee: Toray Industries Inc
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Filing: 1976-01-16
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Granted: 1977-03-01
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Expires: 1996-01-16
Abstract
Abstract A flame retardant polybutyleneterephthalate composition having excellent flame resistance with reduced tendency to drip during combustion, is provided by adding a halogenated diphenylether and a diepoxide compound to a polyester which contains at least 80 mole percent of terephthalic acid based on the total moles of dicarboxylic acid, and at least 80 mole percent 1, 4-butanediol based on the total moles of diol. Decabromodiphenyl is an optional additive.
Inventors
- 👤 Toshikazu Aoyama
- 👤 Hotuma Okasaka
- 👤 Hiroshi Kodama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/15; C08K5/151; C08K5/1515; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
191 words
A flame retardant thermoplastic polyester composition which comprises A. a polyester containing at least about 80 mole percent terephthalic acid based upon the total number of moles of dicarboxylic acid, and at least about 80 mole percent 1,4-butanediol based upon the total number of moles of diol, B. about 4 to 30 weight percent of aromatic halogenated diphenylether represented by the following general formula, said weight percent being based on the weight of the polyester, ##STR4##wherein each of X 1 through X 10 represents a member selected from the group consisting of hydrogen, chlorine and bromine, and at least two X's are chlorine or bromine, and C. about 0.01 to 3 weight percent diepoxy compound based on the weight of the polyester, said diepoxy compound being represented by the general formula ##STR5##wherein R 1 and R 2 represent hydrogen, alkyl, cycloalkyl, aryl, or aralkyl, and R 1 and R 2 may be bonded to each other, and R represents alkylene, cycloalkylene, arylene alkarylene or aralkylene, each of which may optionally have an ether group and/or an ester group, and R may be optionally bonded to R 1 and/or R 2 .
Claim 2
Dependent Claim
191 words
A flame retardant thermoplastic polyester composition which comprises A. a polyester containing at least about 80 mole percent terephthalic acid based upon the total number of moles of dicarboxylic acid, and at least about 80 mole percent 1,4-butanediol based upon the total number of moles of diol, B. about 4 to 30 weight percent of aromatic halogenated diphenylether represented by the following general formula, said weight percent being based on the weight of the polyester, ##STR4##wherein each of X 1 through X 10 represents a member selected from the group consisting of hydrogen, chlorine and bromine, and at least two X's are chlorine or bromine, and C. about 0.01 to 3 weight percent diepoxy compound based on the weight of the polyester, said diepoxy compound being represented by the general formula ##STR5##wherein R 1 and R 2 represent hydrogen, alkyl, cycloalkyl, aryl, or aralkyl, and R 1 and R 2 may be bonded to each other, and R represents alkylene, cycloalkylene, arylene alkarylene or aralkylene, each of which may optionally have an ether group and/or an ester group, and R may be optionally bonded to R 1 and/or R 2 .
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said flame retarding additive further contains decabromodiphenyl.
Claim 4
Dependent Claim
16 words
The composition of claim 1 further comprising D. an antimony-containing compound consisting essentially of antimony trioxide.
Claim 5
Dependent Claim
30 words
The composition of claim 3 wherein the content of said antimony-containing compound is within the range from about 1 to 18 weight percent based on the weight of the polyester.
Claim 6
Dependent Claim
16 words
The composition of claim 1 wherein the halogenated diphenylethers have at least six chlorines or bromines.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein the halogenated diphenylethers are selected from the group consisting of hexabromodiphenylether, octabromodiphenylether, and decabromodiphenylether.
Claim 8
Dependent Claim
21 words
The composition of claim 1 wherein the diepoxy compound is selected from the group consisting of polycondensates of epichlorohydrin with diphenylolpropane.
Claim 9
Dependent Claim
25 words
The composition of claim 2 wherein the ratio by weight of the halogenated diphenylether to decabromodiphenyl is within the range from about 3:7 to 19:1.
Claim 10
Dependent Claim
31 words
The composition of claim 1 wherein the total content of flame retarding additive is within the range from about 5 to 25 weight percent based on the weight of the polyester.
Claim 11
Dependent Claim
29 words
The composition of claim 1 wherein the content of diepoxy compound is within the range from about 0.05 to 2.5 weight percent based on the weight of the polyester.
Claim 12
Dependent Claim
37 words
The composition of claim 1 wherein the diepoxy compound is selected from the group consisting of polycondensates of epihalohydrin with diol, bis-(2,3-epoxy propanol)-esters which are the product of esterification of dicarboxylic acid with 2,3-epoxypropanol, and cycloaliphatic diepoxides.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |