Non-inflammable, anti-electrostatic polycarbonate molding materials
AssigneeBayer Aktiengesellschaft
InventorsAndreas Seidel, Thomas Eckel, Michael Zobel, Dieter Wittmann, Manfred Dietrich
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Abstract
The present invention relates to anti-electrostatic polycarbonate compositions which are provided with chlorine- and bromine-free flame resistance and are distinguished by good mechanical and thermal properties and problem-free processability in the injection moulding process, i.e. by a good melt flowability and a low tendency towards juicing. The present invention also relates to the use of the polycarbonate moulding compositions according to the invention for the production of shaped articles and mouldings of all types, and the shaped articles and mouldings themselves.
Claims22
Compositions comprising polycarbonate and/or polyester-carbonate, at least one impact modifier, at least one phosphorus-containing flameproofing agent chosen from at least one of the substance group of oligomeric phosphoric acid esters, phosphazenes and phosphonate-amines and a polyalkylene ether which is optionally modified with agents which form free radicals and is based on propylene oxide and optionally ethylene oxide, with a propylene oxide content, based on the polyalkylene ether, of 60 to 100 wt. %, wherein the moulding compositions are characterized in that they pass the UL94V test at a wall thickness of 1.6 mm with V-0 or V-1.
Compositions comprising polycarbonate and/or polyester-carbonate, at least one impact modifier, at least one phosphorus-containing flameproofing agent chosen from at least one of the substance group of oligomeric phosphoric acid esters, phosphazenes and phosphonate-amines and 0.5 to 3 parts by wt. (based on 100 parts by wt. of a composition) of a polyalkylene ether which is optionally modified with agents which form free radicals and is based on propylene oxide and optionally ethylene oxide, with a propylene oxide content, based on the polyalkylene ether, of 60 to 100 wt. %.
Compositions according to one or more of the preceding claims, comprising 50 to 90 parts by wt. of aromatic polycarbonate, 2 to 25 parts by wt. of at least one graft polymer, 2 to 20 parts by wt. of at least one phosphorus-containing flameproofing agent chosen from the substance groups of oligomeric phosphoric acid esters, phosphazenes and phosphonate-amines and 0.5 to 3 wt. % of a polyalkylene ether which is optionally modified with agents which form free radicals and is based on propylene oxide and optionally ethylene oxide, with a propylene oxide content, based on the polyalkylene ether, of 60 to 100 wt. %.
Compositions according to one or more of the preceding claims, additionally comprising fluorinated polyolefin, optionally as a coagulate, precompound or masterbatch with a graft polymer or a vinyl (co)polymer.
Compositions according to one or more of the preceding claims, additionally comprising vinyl (co)polymers, polyalkylene terephthalates or mixtures thereof.
Compositions according to one or more of the preceding claims, additionally comprising an inorganic material in the form of particles, flakes or fibres.
Compositions according to one or more of the preceding claims, comprising further commercially available additives.
Compositions according to one or more of the preceding claims, comprising as the flameproofing agent a phosphorus-containing compound of the general formula (IV)
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- wherein
- R1, R2, R3 and R4 independently of one another in each case denote C1- to C8-alkyl, or C5- to C6-cycloalkyl, C6- to C20-aryl or C7- to C12-aralkyl, in each case optionally substituted by alkyl, preferably C1-C4-alkyl,
- n independently of one another, denotes 0 or 1,
- N denotes a number between 0.5 and 30 and
- X denotes a mono- or polynuclear aromatic radical having 6 to 30 C atoms or a linear or branched aliphatic radical having 2 to 30 C atoms, which can be OH-substituted and can contain up to 8 ether bonds.
Compositions according to one or more of the preceding claims, comprising as the flameproofing agent a phosphorus-containing compound of the general formula (V)
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- wherein
- R1, R2, R3and in each independently of one another denote C1-C8-alkyl and/or optionally alkyl-substituted C5-C6-cycloalkyl, C6-C10-aryl or C7-C12-aralkyl,
- n independently of one another, denotes 0 or 1,
- q independently of one another, denotes 0, 1, 2, 3 or 4,
- N denotes a number between 0.5 and 30,
- R5 and R6 independently of one another denote C1-C4-alkyl and
- Y denotes C1-C7-alkylidene, C1-C7-alkylene, C5-C 12-cycloalkylene, C5-C12-cycloalkylidene, —O—, —S—, —SO—, SO2 or —CO—.
Compositions according to one or more of the preceding claims, comprising as the flameproofing agent an oligophosphate based on bisphenol A or resorcinol, of the formula
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- where N is between 0.5 and 10.
Compositions according to one or more of the preceding claims, comprising as the impact modifier one or more graft polymers of 5 to 95 wt. % of at least one vinyl monomer on 95 to 5 wt. % of at least one graft base with a glass transition temperature of <10° C.
Compositions according to one or more of the preceding claims, in which the polyalkylene ether is a pure polypropylene oxide which has optionally been reacted with agents which form free radicals.
Process for the preparation of the polycarbonate moulding compositions according to one or more of the preceding claims, wherein the individual components are mixed and the mixture is compounded at elevated temperature.
Use of the polycarbonate moulding compositions according to one or more of the preceding claims for the production of shaped articles or mouldings of all types.
Shaped articles or mouldings obtainable from the polycarbonate moulding compositions according to one or more of the preceding claims.
Dependencies are inferred from the claim text.