US3923728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant and self-extinguishing molding compositions
Assignee: BASF SE
•
Filing: 1973-09-24
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Granted: 1975-12-02
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Expires: 1993-09-24
Abstract
Abstract Molding compositions based on polybutylene terephthalate which are flame-retardant and self-extinguishing are obtained by incorporating a mixture of 5 to 30% by weight of a Diels-Alder adduct of hexachlorocyclopentadiene, 1 to 15% by weight of a metal compound having a synergistic action therewith and 1 to 10% by weight of a natural silicate into the polycondensate, the percentages by weight being relative to the amount of polyester used.
Inventors
- 👤 Wolfgang Seydl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:02
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
MOLDING COMPOSITIONS BASED ON POLYBUTYLENE TEREPHTHALATE WHICH ARE FLAME-RETARDANT AND SELF-EXTINQUISHING AND TO NOT DRIP DURING AND AFTER FLAMING, AND WHICH COMPRISE A. 5 TO 30% BY WEIGHT OF A DIELS-ALDER ADDUCT OF 2 MOLES OF HEXACHLOROCYCLOPENTADIENE AND EITHER 1 MOLE OF CYCLOPENTADIENE, FURAN, DICYCOPENTADIENE, 1,5-CYCLOOCTADIENE OR DICYCLO-(2,2,1)-HEPTADIENE, B. 1 TO 15% BY WEIGHT OF A NATURAL SILICATE, THE PERCENTAGES TIC ACTION AND, C. 1 TO 10% BTY WEIGHT OF A NATURAL SILICATE, THE PERCENTAGES BY WEIGHT OF COMPONENTS A, B AND C BEING RELATIVE TO THE AMOUNT OF POLYESTER USED.
Claim 2
Dependent Claim
91 words
MOLDING COMPOSITIONS BASED ON POLYBUTYLENE TEREPHTHALATE WHICH ARE FLAME-RETARDANT AND SELF-EXTINQUISHING AND TO NOT DRIP DURING AND AFTER FLAMING, AND WHICH COMPRISE A. 5 TO 30% BY WEIGHT OF A DIELS-ALDER ADDUCT OF 2 MOLES OF HEXACHLOROCYCLOPENTADIENE AND EITHER 1 MOLE OF CYCLOPENTADIENE, FURAN, DICYCOPENTADIENE, 1,5-CYCLOOCTADIENE OR DICYCLO-(2,2,1)-HEPTADIENE, B. 1 TO 15% BY WEIGHT OF A NATURAL SILICATE, THE PERCENTAGES TIC ACTION AND, C. 1 TO 10% BTY WEIGHT OF A NATURAL SILICATE, THE PERCENTAGES BY WEIGHT OF COMPONENTS A, B AND C BEING RELATIVE TO THE AMOUNT OF POLYESTER USED.
Claim 3
Dependent Claim
96 words
Molding compositions based on polybutylene terephthalate which are flame-retardant and self-extinguishing and do not drip during and after flaming, and which comprise a mixture consisting of A. 5 to 30% by weight of a Diels-Alder adduct of 2 moles of hexachlorocyclopentadiene and either 1 mole of cyclopentadiene, furan, dicyclopentadiene, 1,5-cyclooctadiene or dicyclo-(2,2, 1)-heptadiene, B. 1 to 15% by weight of a metal compound having synergistic action and C. 1 to 10% by weight of a natural silicate, the percentages by weight of the components A, B and C being relative to the amount of polyester used.
Claim 4
Dependent Claim
96 words
Molding compositions based on polybutylene terephthalate which are flame-retardant and self-extinguishing and do not drip during and after flaming, and which comprise a mixture consisting of A. 5 to 30% by weight of a Diels-Alder adduct of 2 moles of hexachlorocyclopentadiene and either 1 mole of cyclopentadiene, furan, dicyclopentadiene, 1,5-cyclooctadiene or dicyclo-(2,2, 1)-heptadiene, B. 1 to 15% by weight of a metal compound having synergistic action and C. 1 to 10% by weight of a natural silicate, the percentages by weight of the components A, B and C being relative to the amount of polyester used.
Claim 5
Dependent Claim
44 words
Molding compositions as claimed in claim 1, wherein the Diels-Alder adduct of hexaclorocyclopentadiene consists of an adduct of 2 moles of hexachlorocyclopentadiene and 1 mole of 1, 5-cyclooctadiene or furan or of an adduct of 1 mole of hexachlorocyclopentadiene and 1 mole of tetrabromostyrene.
Claim 6
Dependent Claim
17 words
Molding compositions as claimed in claim 1, wherein the synergistically active metal compound consists of antimony trioxide.
Claim 7
Dependent Claim
14 words
Molding compositions as claimed in claim 1, wherein the natural silicate consists of asbestos.
Claim 8
Dependent Claim
23 words
Molding composition as set forth in claim 1 wherein said metal compound (B) is an oxide of iron, zinc, antimony, tin or bismuth.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |