# US 10,501,624 B2 · Flame-retardant polycarbonate-polyester compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,624 B2 - Document ID: US10501624B2 - Status: Granted - Kind: B2 - Application number: 15/736,136 - Filed: 2015-06-18 - Published: 2019-03-14 - Granted: 2019-12-10 - Earliest claimed: 2015-06-18 - Assignees: Covestro Deutschland AG - Applicants: Covestro Deutschland AG - Inventors: Mathieu Jung; Ralf Hufen; Thomas Eckel - Web page: https://patentgrep.com/patent/US10501624B2 ## CPC - C08L 69/005: {Polyester-carbonates} - C08K 5/5399: Phosphorus bound to nitrogen - C08L 27/12: containing fluorine atoms - C08L 51/04: grafted on to rubbers - C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - B29C 51/002: {characterised by the choice of material} - C08K 3/013: Fillers, pigments or reinforcing additives - C08K 5/005: {Stabilisers against oxidation, heat, light, ozone} - C08K 5/0075: {Antistatics} - C08L 2201/02: Flame or fire retardant/resistant - 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) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) ## Abstract Compositions comprising A) at least one polymer selected from the group consisting of aromatic polycarbonate and aromatic polyestercarbonate, B) at least one polyester, wherein the polyester is derived from succinic acid and optionally further dicarboxylic acids and aliphatic, cycloaliphatic, araliphatic diols or aromatic diols, C) at least one cyclic phosphazene of structure (IV) wherein R is in each case identical or different and represents an amine radical, in each case optionally halogenated C1- to C8-alkyl, C1- to C8-alkoxy in each case optionally alkyl- and/or halogen-substituted C5- to C6-cycloalkyl, in each case optionally alkyl- and/or halogen- and/or hydroxyl-substituted C6- to C20-aryloxy, in each case optionally alkyl- and/or halogen- and/or bromine-substituted C7- to C12-aralkyl, a halogen radical or an OH radical, k is a whole number from 1 to 10 D) optionally graft polymer, E) optionally vinyl (co)polymer and/or polyalkylene terephthalate, F) optionally additives and also the use of these flame-retarded polycarbonate/polyester compositions for producing molded articles and the molded articles themselves, wherein the polyester in the composition can be obtained or prepared preferably from renewable raw materials. ## Claims ### Claim 1 A composition comprising A) at least one polymer selected from the group consisting of aromatic polycarbonate and aromatic polyestercarbonate, B) at least one polyester, wherein the polyester is derived from succinic acid and butanediol, C) at least one cyclic phosphazene of structure (IV) wherein R is in each case identical or different and represents an amine radical, in each case optionally halogenated C1- to C8-alkyl, C1- to C8-alkoxy in each case optionally alkyl- and/or halogen-substituted C5- to C6-cycloalkyl, in each case optionally alkyl- and/or halogen- and/or hydroxyl-substituted C6- to C20-aryloxy, in each case optionally alkyl- and/or halogen- and/or bromine-substituted C7- to C12-aralkyl, a halogen radical or an OH radical, k is a whole number from 1 to 10, D) optionally graft polymer, E) optionally vinyl (co)polymer and/or polyalkylene terephthalate, and F) optionally additives. ### Claim 2 (depends on 1) The composition as claimed in claim 1, wherein the proportions of the components are as follows A) 40 to 98 parts by weight, B) 1 to 60 parts by weight, C) 1 to 20 parts by weight, D) 0 to 20 parts by weight, E) 0 to 20 parts by weight, F) 0 to 30 parts by weight, and wherein the sum of the parts by weight of the composition is normalized to 100. ### Claim 3 (depends on 1) The composition as claimed in claim 1, wherein the proportions of the components are as follows A) 50 to 85 parts by weight, B) 5 to 45 parts by weight, C) 3 to 12 parts by weight, D) 0 to 10 parts by weight, E) 0 to 10 parts by weight, F) 0.2 to 10 parts by weight, and wherein the sum of the parts by weight of the composition is normalized to 100. ### Claim 4 (depends on 1) The composition as claimed in claim 1, wherein k is a whole number from 1 to 5. ### Claim 5 (depends on 1) The composition as claimed in claim 1, wherein the proportion of the trimers (k=1) is from 50 to 98 mol % of the component C. ### Claim 6 (depends on 1) The composition as claimed in claim 1, wherein the proportion of the trimers (k=1) is from 70 to 85 mol % of the component C. ### Claim 7 (depends on 1) The composition as claimed in claim 1, wherein the component C is selected from the group consisting of propoxyphosphazenes, phenoxyphosphazenes, methylphenoxyphosphazenes, aminophosphazenes and fluoroalkylphosphazenes. ### Claim 8 (depends on 1) The composition as claimed in claim 1, wherein the weight-average molecular weights Mw of component B are between 40 and 500 kg/mol, determined by gel permeation chromatography against a polystyrene reference. ### Claim 9 (depends on 1) The composition as claimed in claim 1, wherein component F is at least one additive selected from the group consisting of flame retardant synergists, anti-dripping agents, lubricants and mold release agents, nucleating agents, stabilizers, antistats, dyes, pigments, fillers and reinforcing agents. ### Claim 10 (depends on 1) The composition as claimed in claim 1, wherein the acid component of the polyester originates from renewable raw materials. ### Claim 11 (depends on 1) A process for producing injection-molded or thermoformed molded articles which comprises utilizing the composition as claimed in claim 1. ### Claim 12 (depends on 1) A molded article obtainable from the composition as claimed in claim 1. ### Claim 13 A composition consisting of A) 50 to 85 parts by weight of at least one polymer selected from the group consisting of aromatic polycarbonate and aromatic polyestercarbonate, B) 5 to 45 parts by weight of at least one polyester, wherein the polyester is derived from succinic acid and butanediol, and optionally contains a coupling agent, C) 3 to 12 parts by weight of a compound selected from the group consisting of propoxyphosphazenes, phenoxyphosphazenes, methylphenoxyphosphazenes, aminophosphazenes and fluoroalkylphosphazenes, D) 0 to 10 parts by weight of graft polymer, E) 0 to 10 parts by weight of vinyl (co)polymer and/or polyalkylene terephthalate, and F) 0.2 to 10 parts by weight of additives. ### Claim 14 (depends on 13) The composition of claim 13, wherein component C is phenoxyphosphazene having a trimer proportion (k=1) of 65 to 85 mol %, a tetramer proportion (k=2) of 10 to 20 mol %, a proportion of higher oligomeric phosphazenes (k=3, 4, 5, 6 and 7) of 5 to 20 mol % and phosphazene oligomers with k>=8 of 0 to 2 mol % based on component C. ### Claim 15 (depends on 14) The composition of claim 14, wherein the molecular weight of component B is between 80 and 400 kg/mol. ### Claim 16 (depends on 13) The composition of claim 13, wherein the composition is free from vinyl (co)polymers and polyalkylene terephthalates. ### Claim 17 (depends on 14) The composition of claim 14, wherein the coupling agent is hexamethylene diisocyanate os isophorone diisocyanate.