Patent US3923728A successfully refreshed from Google Patents.
US3923728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant and self-extinguishing molding compositions
Assignee: BASF SE
•
Filing: 1973-09-24
•
Granted: 1975-12-02
•
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 11:55
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.
References Cited (Backward Citations)
US2779701A
Cited
US3287395A
Cited
US3362928A
Cited
US3403036A
Cited
US3814725A
Cited
US3624024A
Cited
US3632544A
Cited
US3711562A
Cited
US3751396A
Cited
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 |