US4056508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Difficultly inflammable polyester molding compositions
Assignee: Dynamit Nobel AG
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Filing: 1975-10-06
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Granted: 1977-11-01
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Expires: 1995-10-06
Abstract
Abstract A flame stabilized molding composition comprising: 1. A polyester which is the condensation product of an aromatic dicarboxylic acid, acid halide or ester and an aliphatic diol having more than 2 atoms in the chain, and 2. 1,4-bis-(β,γ,γ-trichloroallyl)-2,3,5,6-tetrachlorobenzene of the formula ##STR1## SAID 1,4-BIS-(β,γ,γ-TRICHLOROALLYL)-2,3,5,6-TETRACHLOROBENZENE PRESENT IN SAID MOLDING COMPOSITION IN AN AMOUNT OF 5-30 WEIGHT PERCENT, PREFERABLY 10-25%, BASED UPON THE WEIGHT OF SAID POLYESTER.
Inventors
- 👤 Werner Schmidt
- 👤 Egon Norbert Petersen
- 👤 Hermann Richtzenhain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:34
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A flame stabilized molding composition comprising: 1. A polyester which is the condensation product of an aromatic dicarboxylic acid, acid-halide or ester and an aliphatic diol having more than 2 carbon atoms in the chain; and 2. 1,4-bis-(β,γ,γ-trichloroallyl)-2,3,5,6-tetrachlorobenzene, as flameproofing agent, which has the formula: ##STR3## said 1,4-bis-(β,γ,γ-trichloroallyl)-2,3,5,6-tetrachlorobenzene being present in said composition in an amount of 5-30 weight percent based upon the weight of said polyester.
Claim 2
Dependent Claim
67 words
A flame stabilized molding composition comprising: 1. A polyester which is the condensation product of an aromatic dicarboxylic acid, acid-halide or ester and an aliphatic diol having more than 2 carbon atoms in the chain; and 2. 1,4-bis-(β,γ,γ-trichloroallyl)-2,3,5,6-tetrachlorobenzene, as flameproofing agent, which has the formula: ##STR3## said 1,4-bis-(β,γ,γ-trichloroallyl)-2,3,5,6-tetrachlorobenzene being present in said composition in an amount of 5-30 weight percent based upon the weight of said polyester.
Claim 3
Dependent Claim
32 words
A flame stabilized molding composition according to claim 1 wherein said 1,4-bis-(β,γ,γ-trichloroallyl)-2,3,5,6-tetrachlorobenzene is present in said molding composition in an amount of 10-25 weight percent based upon the weight of said polyester.
Claim 4
Dependent Claim
29 words
A flame stabilized molding composition according to claim 1 wherein said polyester is the condensation product of: a. dimethylterephthalate, and b. a diol having 3 or 4 carbon atoms.
Claim 5
Dependent Claim
54 words
A polyester molding composition according to claim 1 wherein said molding composition contains, as a polyester component, a polytetramethylene terephthalate having a reduced viscosity of 1.2 to 2.0, determined at 25° C employing 1 gm. of polyester in 100 ml. of solvent which solvent is a 40:60 weight percent mixture of 1,1,2,2-tetrachloroethane and phenol.
Claim 6
Dependent Claim
19 words
A polyester molding composition according to claim 4 wherein the polyester has a reduced viscosity of 1.3 to 1.6.
Claim 7
Dependent Claim
32 words
A polyester molding composition according to claim 1 containing an antimony compound in an amount of 0.5 to 15 weight percent based upon the weight of the polyester in the molding composition.
Claim 8
Dependent Claim
37 words
A molding composition according to claim 6 wherein said antimony compound is present in said molding composition in an amount of 2 to 12 weight percent based upon the weight of the polyester in said molding composition.
Claim 9
Dependent Claim
34 words
A molding composition according to claim 7 wherein said antimony compound is selected from the group consisting of sodium antimonite, potassium antimonate, antimony sulfide, an antimony salt of an organic acid, and antimony trioxide.
Claim 10
Dependent Claim
31 words
A molding composition according to claim 1 containing a boron flameproofing compound in an amount of 0.5 to 15 weight percent based upon the weight of polyester in the molding composition.
Claim 11
Dependent Claim
30 words
A molding composition according to claim 1 containing between 2 and 12 weight percent of a boron flameproofing agent, based upon the weight of the polyester in the molding composition.
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |