US3928283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproof, thermoplastic polyester composition
Assignee: Toyobo Co Ltd
•
Filing: 1971-03-09
•
Granted: 1975-12-23
•
Expires: 1991-03-09
Abstract
Abstract A fireproof, thermoplastic polyester composition which comprises a polyester and a polyaryl phosphonate incorporated therein in an amount of 0.7 to 4.0 weight % as phosphorus to the polyester, the said polyaryl phosphonate being not less than 6 in the degree of polymerization and containing as its diol component at least one of the aromatic diol compounds of the formulae: WHEREIN Y is alkylidene or cycloalkylidene having 1 to 6 carbon atoms and the benzene ring may bear one of more alkyl(s).
Inventors
- 👤 Yukito Masai
- 👤 Yasuo Kato
- 👤 Ken Murayama
- 👤 Nobuhiko Fukui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:41
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4021; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A FIREPROOF, THERMOPLASTIC POLYESTER COMPOSITION HAVING A VISCOSITY AND DEGREE OF POLYMERIZATION SUITABLE FOR MELT SPINNING INTO FILAMENTS, WHICH COMPRISES A POLYESTER AND A POLYARYL PHOSPHONATE INCORPORATED THEREIN IN AN AMOUNT OF 0.7 TO 4.0 WEIGHT % AS PHOSPHORUS TO THE POLYESTER, THE SAID POLYARYL PHOSPHONATE BEING NOT LESS THAN 6 IN THE DEGREE OF POLYMERIZATION AND CONTAINING AS ITS DIOL COMPONENT AT LEAST ONE OF THE AROMATIC DIOL COMPOUNDS OF THE FORMULAE:
Claim 2
Dependent Claim
73 words
A FIREPROOF, THERMOPLASTIC POLYESTER COMPOSITION HAVING A VISCOSITY AND DEGREE OF POLYMERIZATION SUITABLE FOR MELT SPINNING INTO FILAMENTS, WHICH COMPRISES A POLYESTER AND A POLYARYL PHOSPHONATE INCORPORATED THEREIN IN AN AMOUNT OF 0.7 TO 4.0 WEIGHT % AS PHOSPHORUS TO THE POLYESTER, THE SAID POLYARYL PHOSPHONATE BEING NOT LESS THAN 6 IN THE DEGREE OF POLYMERIZATION AND CONTAINING AS ITS DIOL COMPONENT AT LEAST ONE OF THE AROMATIC DIOL COMPOUNDS OF THE FORMULAE:
Claim 3
Dependent Claim
30 words
The fireproof, thermoplastic polyester composition according to claim 1, wherein the polyaryl phosphonate is the one prepared by reacting at least one of the aromatic diol compounds of the formulae:
Claim 4
Dependent Claim
26 words
The fireproof, thermoplastic polyester composition according to claim 1, wherein the polyaryl phosphonate is the one prepared by surface polymerization of a compound of the formula:
Claim 5
Dependent Claim
35 words
The fireproof, thermoplastic polyester composition according to claim 1, wherein the polyester is polyethylene terephthalate, fiber-forming copolymerized polyester containing not less than 80 mol of ethylene terephthalate unit, poly-1,4-cyclohexylidenedimethylene terephthalate, polyethylene sebacate or polyethylene adipate.
Claim 6
Dependent Claim
54 words
The fireproof, thermoplastic polyester composition according to claim 1, wherein the polyaryl phosphponate is obtained from reaction of at least one aromatic diol selected from the group consisting of hydroquinone, resorcinol, 4,4''-dihydroxybiphenyl, 4,4''-methylenebisphenol, 4,4''-ethylidenebisphenol, 4,4''-isopropylidenebisphenol, 4,4''-cyclohexylidenebisphenol, 2,2''-methylenebisphenol, 1,5-dihydroxynaphthalene, and 2,7-dihydroxynaphthalene, and a compound selected from the group consisting of phenyldichlorophosphine oxide and phenyldibromophosphine oxide.
References Cited (Backward Citations)
US3053795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |