EP0747424A1
Expired / Lapsed
EP
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Phosphate flame retardant polymer
Assignee: SABIC Global Technologies BV
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Filing: 1996-05-31
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Granted: —
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Expires: 2016-05-31
Abstract
Abstract A flame retardant moldable thermoplastic resin composition consisting of a thermoplastic resin and a flame retardant consisting of a combination of a low molecular weight phosphate having a molecular weight of about 500 to about 2000 and a high molecular weight phosphate having a molecular weight of about 2300 to about 11,000 and to articles molded therewith. The composition has a high heat deflection temperature, good impact resistance, excellent flame retardancy and good flow for easier processing.
Inventors
- 👤 Qamar Singh Bhatia
- 👤 Robert L. Howe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08K5/523; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A moldable flame retardant thermoplastic resin composition comprising in admixture a moldable thermoplastic resin and a sufficient amount of a flame retardant to render the composition flame retardant which flame retardant consists essentially of, in combination, a low molecular phosphate having a molecular weight of at least about 500 and a high molecular weight phosphate having a molecular weight of at least about 2300, providing that the molecular weights do not overlap each other.
Claim 2
Dependent Claim
21 words
The composition of claim 1 wherein the low molecular weight phosphate has a molecular weight of about 500 to about 2000.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein the high molecular weight phosphate has a molecular weight of about 2300 to about 11,000.
Claim 4
Dependent Claim
48 words
The composition of claim 1 wherein the flame retardant consists essentially of about 10 to 90 weight % of the low molecular weight phosphate and, correspondingly, about 90 to 10 weight % of the high molecular weight phosphate based on the total weight of the phosphate flame retardant.
Claim 5
Dependent Claim
32 words
The compositions of claim 1 wherein the thermoplastic resin is selected from the group consisting of aromatic polycarbonates, polyphenylene ethers, polyalkylene terephthates, polyetherimides, polyetherimide esters, polyamides, styrene containing polymers and blends thereof.
Claim 6
Dependent Claim
21 words
The composition of claim 5 wherein the thermoplastic resin is an admixture of an aromatic polycarbonate and a styrene containing polymer.
Claim 7
Dependent Claim
22 words
The composition of claim 5 wherein the thermoplastic resin is an admixture of a polyphenylene ether resin and a high impact polystyrene.
Claim 8
Dependent Claim
32 words
The composition of claim 1 consisting essentially of about 75 to about 97 weight % of the thermoplastic resin and, correspondingly, about 25 to about 3 weight % of the flame retardant.
Claim 9
Dependent Claim
63 words
The composition of claim 1 wherein the low molecular weight phosphate is of the following formula: Wherein R1, R2, R3 and R4 are independently selected from the group consisting of an aryl or an alkyaryl group; X is an arylene group; m is an integer of from 0 and 1; n is an integer of from 1 to 5; and P is phosphorous.
Claim 10
Dependent Claim
26 words
The composition of claim 9 wherein the high molecular weight phosphate is of the same formula and n is an integer of from 6 to 35.
References Cited (Backward Citations)
JPS57207641A
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EP0103230A2
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EP0103231A2
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EP0363608A1
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WO1993004119A1
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JPH0873654A
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