Patent US4079035A successfully refreshed from Google Patents.
US4079035A
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Halophenoxyphosphazene fire retardants and polyesters containing same
Assignee: Albemarle Corp
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Filing: 1976-02-27
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Granted: 1978-03-14
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Expires: 1996-02-27
Abstract
Abstract The fire retardancy of polyesters is enhanced with halophenoxyphosphazenes which are reaction products of a halogenated phenol and a phosphonitrilic halide. Brominated phenols are preferred although chlorophenols can be used. Of the brominated phenols, preferred starting materials are p-bromophenol, 2,4-dibromophenol and mixtures thereof. Phosphonitrilic chlorides are preferred starting materials. Pure phosphonitrilic halides can be used; however, mixtures are preferred because of their availability. Cyclic and linear phosphonitrilic halides are useful as well as mixtures thereof. Saturated and unsaturated polyesters can be made fire retardant by this invention as can thermoplastic and thermosetting materials. Linear and crosslinked polyesters can be treated. Preferred polyesters are fiber forming polyesters of a diol and dibasic acid, such as poly(ethylene terephthalate) and poly(1,4-cyclohexylenedimethyleneterephthalate).
Inventors
- 👤 David R. Brackenridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:29
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/062; C07F9/065; C07F9/067; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/5399
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
42 words
As a composition of matter, polyester stabilized with a fire retardant amount of a phosphazene that is a reaction product of a phosphonitrilic halide and a chlorinated or brominated monohydroxyaromatic compound, said polyester being selected from unsaturated polyester resin and fiber-forming polyester.
Claim 2
Dependent Claim
42 words
As a composition of matter, polyester stabilized with a fire retardant amount of a phosphazene that is a reaction product of a phosphonitrilic halide and a chlorinated or brominated monohydroxyaromatic compound, said polyester being selected from unsaturated polyester resin and fiber-forming polyester.
Claim 3
Dependent Claim
72 words
A composition of claim 1 comprising (a) a fiber-forming polyester condensation product of a diol and a dicarboxylic acid, or ester of a dicarboxylic acid, selected from the class consisting of isophthalic acid, terephthalic acid and saturated aliphatic dibasic acids of 2 to about 10 carbon atoms, and (b) a fire retardant amount of a phosphazene that is a reaction product of a phosphonitrilic halide and a chlorinated or brominated monohydroxyaromatic compound.
Claim 4
Dependent Claim
20 words
A composition of claim 1 wherein said compound has an isolated benezene nucleus of up to about 10 carbon atoms.
Claim 5
Dependent Claim
20 words
A composition of claim 3 wherein said monohydroxyaromatic compound with an isolated benzene nucleus is a chlorinated or brominated phenol.
Claim 6
Dependent Claim
20 words
A composition of claim 4 wherein said phenol is selected from the class consisting of p-bromophenol, 2,4-dibromophenol, and mixtures thereof.
Claim 7
Dependent Claim
119 words
A composition of matter comprising (a) a fiber-forming polyester of a diol and a dicarboxylic acid selected from the class consisting of isophthalic acid, terephthalic acid and saturated aliphatic dibasic acids of 2 to about 10 carbon atoms, and (b) a fire retardant amount of a phosphazene having the formula ##STR8## where n is 3 or more and T is a monohydroxy aromatic radical having the formula ##STR9## wherein R is an alkyl group of up to about 3 carbon atoms, a is an integer of value 0-4 such that the number of carbon atoms in said aromatic compound does not exceed about 10, X is selected from chlorine and bromine, and y is an integer of value 1-5.
Claim 8
Dependent Claim
119 words
A composition of matter comprising (a) a fiber-forming polyester of a diol and a dicarboxylic acid selected from the class consisting of isophthalic acid, terephthalic acid and saturated aliphatic dibasic acids of 2 to about 10 carbon atoms, and (b) a fire retardant amount of a phosphazene having the formula ##STR8## where n is 3 or more and T is a monohydroxy aromatic radical having the formula ##STR9## wherein R is an alkyl group of up to about 3 carbon atoms, a is an integer of value 0-4 such that the number of carbon atoms in said aromatic compound does not exceed about 10, X is selected from chlorine and bromine, and y is an integer of value 1-5.
Claim 9
Dependent Claim
16 words
A composition of claim 6 wherein said phosphazene has a melting point above about 200° C.
Claim 10
Dependent Claim
46 words
A composition of claim 6 wherein said phosphazene is essentially cyclic and essentially free of trimer, and at least 50 weight percent thereof is composed of cyclic tetramer, cyclic pentamer, or mixture thereof, the molecular weight of said phosphazene being from about 1900 to about 6600.
Claim 11
Dependent Claim
22 words
A composition of claim 6 wherein said phosphazene is essentially linear and the molecular weight is from about 4000 to about 6000.
Claim 12
Dependent Claim
87 words
Polyester stabilized with a flame retardant amount of condensation product of phosphonitrilic dihalide and p-bromophenol, said polyester being selected from the class consisting of saturated polyester fiber made from ethylene glycol and an acid selected from the class consisting of isophthalic and terephthalic acid, an unsaturated polyester resin made from said alcohol and a mixture of maleic acid and another acid selected from the class consisting of isophthalic and terephthalic acid, said mixture being crosslinked with a material selected from the class consisting of divinylbenzene and styrene.
Claim 13
Dependent Claim
87 words
Polyester stabilized with a flame retardant amount of condensation product of phosphonitrilic dihalide and p-bromophenol, said polyester being selected from the class consisting of saturated polyester fiber made from ethylene glycol and an acid selected from the class consisting of isophthalic and terephthalic acid, an unsaturated polyester resin made from said alcohol and a mixture of maleic acid and another acid selected from the class consisting of isophthalic and terephthalic acid, said mixture being crosslinked with a material selected from the class consisting of divinylbenzene and styrene.
Claim 14
Dependent Claim
22 words
A polyester composition of claim 10 wherein the concentration of said condensation product is from about 5 to about 30 weight percent.
Claim 15
Dependent Claim
18 words
A polyester composition of claim 10 wherein said condensation product is a p-bromophenyl derivative of a phosphonitrilic chloride.
Claim 16
Dependent Claim
8 words
An unsaturated polyester resin composition of claim 10.
Claim 17
Dependent Claim
8 words
A saturated polyester fiber composition of claim 10.
Claim 18
Dependent Claim
141 words
Polyester stabilized with a flame retardant amount of condensation product of phosphonitrilic dihalide and a brominated phenol having the formula ##STR10## wherein R is an alkyl radical of up to about 3 carbon atoms, a is an integer of value 0-3 such that the total number of carbon atoms in radicals appended to the ring is not more than about 4 and y is an integer of value 1-5; said polyester being selected from the class consisting of saturated polyester fiber made from ethylene glycol and an acid selected from the class consisting of isophthalic and terephthalic acid, and unsaturated polyester resin made from said alcohol and a mixture of maleic acid and another acid selected from the class consisting of isophthalic and terephthalic acid, said mixture being crosslinked with a material selected from the class consisting of divinylbenzene and styrene.
Claim 19
Dependent Claim
141 words
Polyester stabilized with a flame retardant amount of condensation product of phosphonitrilic dihalide and a brominated phenol having the formula ##STR10## wherein R is an alkyl radical of up to about 3 carbon atoms, a is an integer of value 0-3 such that the total number of carbon atoms in radicals appended to the ring is not more than about 4 and y is an integer of value 1-5; said polyester being selected from the class consisting of saturated polyester fiber made from ethylene glycol and an acid selected from the class consisting of isophthalic and terephthalic acid, and unsaturated polyester resin made from said alcohol and a mixture of maleic acid and another acid selected from the class consisting of isophthalic and terephthalic acid, said mixture being crosslinked with a material selected from the class consisting of divinylbenzene and styrene.
Claim 20
Dependent Claim
22 words
A polyester composition of claim 15 wherein the concentration of said condensation product is from about 5 to about 30 weight percent.
Claim 21
Dependent Claim
17 words
A polyester composition of claim 1 wherein said condensation product is a 2,4-dibromophenyl derivative of phosphonitrilic dichloride.
Claim 22
Dependent Claim
8 words
An unsaturated polyester resin composition of claim 15.
Claim 23
Dependent Claim
8 words
A saturated polyester fiber composition of claim 15.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |