# US 7,608,651 B2 · Flame retardant thermoplastic article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,651 B2 - Document ID: US7608651B2 - Status: Granted - Kind: B2 - Application number: 11/279,148 - Filed: 2006-04-10 - Published: 2006-07-27 - Granted: 2009-10-27 - Earliest claimed: 2004-11-22 - Assignees: Sabic Innovative Plastics IP B.V. - Inventors: Pravin Borade; Manatesh Chakraborty; Anantharaman Dhanabalan; Roshan Kumar Jha; Jaykisor Pal - Web page: https://patentgrep.com/patent/US7608651B2 ## CPC - C08L 71/12: Polyphenylene oxides - C08K 5/0066: {Flame-proofing or flame-retarding additives} - C08K 5/5313: Phosphinic compounds, e.g. R2=P(:O)OR' - C08L 77/00: Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers - C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - C08K 3/38: Boron-containing compounds - C08L 2201/02: Flame or fire retardant/resistant - Y10T 428/31855: Of addition polymer from unsaturated monomers - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An article comprises a compatibilized poly(arylene ether)/polyamide blend, an optional electrically conductive filler, a phosphinate, and flame retardant augment selected from the group consisting of melamine polyphosphate, zinc borate, low melting glass, talc, and combinations of two or more of the foregoing flame retardant augments. ## Claims ### Claim 1 An article comprising a flame retardant thermoplastic composition wherein the thermoplastic composition comprises: a compatibilized poly(arylene ether)/polyamide blend; an electrically conductive filler; a phosphinate; and a flame retardant augment selected from the group consisting of melamine polyphosphate, zinc borate, low melting glass, talc, and combinations of two or more of the foregoing flame retardant augments and further wherein the article is made by profile extrusion. ### Claim 2 (depends on 1) The article of claim 1 wherein the composition further comprises an impact modifier. ### Claim 3 (depends on 2) The article of claim 2 wherein the ratio of the combined weight of phosphinate and flame retardant augment to the combined weight of polyamide, electrically conductive filler and impact modifier is less than 0.20. ### Claim 4 (depends on 1) The article of claim 1 wherein the composition has a flame retardancy rating of V-1 or better according to Underwriter's Laboratory Bulletin 94 entitled “Tests for Flammability of Plastic Materials, UL94” (Dec. 12, 2003 revision) at a thickness of 2 millimeters. ### Claim 5 (depends on 1) The article of claim 1 wherein the composition has a specific volume resistivity less than or equal to 106 ohm-cm. ### Claim 6 (depends on 1) The article of claim 1 wherein the phosphinate is present in an amount of 1 to 11 weight percent and the flame retardant augment or combination of augments is present in an amount of 0.1 to 6 weight percent, based on the total weight of the composition. ### Claim 7 (depends on 1) The article of claim 1 wherein the weight ratio of flame retardant augment to phosphinate is less than or equal to 0.75. ### Claim 8 (depends on 1) The article of claim 1 wherein the total combined amount of phosphinate and flame retardant augment is less than or equal to 12 weight percent, based on the total weight of the composition. ### Claim 9 (depends on 1) The article of claim 1 wherein the composition comprises melamine polyphosphate and zinc borate and the amount of zinc borate is greater than the amount of melamine polyphosphate. ### Claim 10 (depends on 1) The article of claim 1, wherein the article is a unitary, non-enclosed article. ### Claim 11 (depends on 10) A window frame comprising the article of claim 10. ### Claim 12 (depends on 10) A furniture frame comprising the article of claim 10. ### Claim 13 (depends on 10) A room partition comprising the article of claim 10. ### Claim 14 An article comprising a flame retardant thermoplastic composition wherein the composition comprises: a compatibilized poly(arylene ether)/ polyamide blend; a phosphinate; and a flame retardant augment selected from the group consisting of melamine polyphosphate, zinc borate, low melting glass, titanium dioxide, talc, and combinations of two or more of the foregoing flame retardant augments and further wherein the article is made by profile extrusion. ### Claim 15 (depends on 14) The article of claim 14 wherein the composition further comprises an impact modifier. ### Claim 16 (depends on 15) The article of claim 15 wherein the ratio of the combined weight of phosphinate and flame retardant augment to the combined weight of polyamide and impact modifier is less than 0.20. ### Claim 17 (depends on 14) The article of claim 14 wherein the composition has a flame retardancy rating of V-1 or better according to Underwriter's Laboratory Bulletin 94 entitled “Tests for Flammability of Plastic Materials, UL94” (Dec. 12, 2003 revision) at a thickness of 2 millimeters. ### Claim 18 (depends on 14) The article of claim 14 wherein the phosphinate is present in an amount of 1 to 11 weight percent and the flame retardant augment or combination of augments is present in an amount of 0.1 to 6 weight percent, based on the total weight of the composition. ### Claim 19 (depends on 14) The article of claim 14 wherein the weight ratio of flame retardant augment to phosphinate is less than or equal to 0.75. ### Claim 20 (depends on 14) The article of claim 14 wherein the total combined amount of phosphinate and flame retardant augment is less than or equal to 12 weight percent, based on the total weight of the composition. ### Claim 21 (depends on 14) The article of claim 14 wherein the composition comprises melamine polyphosphate and zinc borate and the amount of zinc borate is greater than the amount of melamine polyphosphate. ### Claim 22 (depends on 14) The article of claim 14 wherein the article is a unitary, non-enclosed article. ### Claim 23 (depends on 22) A window frame comprising the article of claim 22. ### Claim 24 (depends on 22) A furniture frame comprising the article of claim 22. ### Claim 25 (depends on 22) A room partition comprising the article of claim 22.