WO2017005735A1 - Verbesserung der fliessfähigkeit von thermisch leitfähigen polycarbonatzusammensetzungen - Google Patents
Verbesserung der fliessfähigkeit von thermisch leitfähigen polycarbonatzusammensetzungen Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
Definitions
- the present invention relates to thermally conductive polycarbonate compositions having improved flowability.
- Polycarbonate compositions in the sense of the invention are understood as meaning those compositions whose main polymer component is polycarbonate.
- Thermally conductive polycarbonate compositions are used in particular in the electrical and electronics industry for thermal management, for example for heat sinks,
- the thermal conductivity of polycarbonate compositions can be achieved by the addition of a thermally conductive filler, usually a graphite, in particular an expanded graphite.
- a thermally conductive filler usually a graphite, in particular an expanded graphite.
- the melt viscosities of the compositions are so high that the addition of a flow improver is required for processing the compositions.
- a low melt viscosity is required so that components with a uniform wall thickness can be realized.
- Low melt viscosities are also essential in the realization of one-piece components of more complex construction from one material.
- BDP bisphenol A diphosphate
- the polycarbonate compositions to which diglycerol ester has been added show good melt stabilities with improved rheological properties, namely a higher melt volume flow rate (MVR), determined according to DIN EN ISO 1133 (at a test temperature of 300 ° C., mass 1.2 kg, DIN EN ISO 1133 -1: 2012-03) and an improved melt viscosity, determined to ISO 11443 (ISO 11443: 2014-04), compared to corresponding compositions which otherwise contain the same components except the diglycerol ester.
- MVR melt volume flow rate
- compositions are furthermore characterized by good heat resistance, measurable on the basis of the glass transition temperature, which is determined by means of DSC (during the second heating, heating rate: 20 K / min).
- the polycarbonate compositions of the invention may contain other conventional additives. Further customary additives are, for example, mold release agents, thermal stabilizers and / or transesterification stabilizers, flameproofing agents, anti-dripping agents, antioxidants, inorganic pigments, carbon black, dyes and / or inorganic fillers, such as titanium dioxide, silicates, talc and / or barium sulfate.
- compositions according to the invention preferably comprise mold release agents, thermal and / or transesterification stabilizers, flameproofing agents, anti-dripping agents, antioxidants, inorganic pigments, carbon black, dyes and / or inorganic fillers, such as titanium dioxide, silicates, talc and / or barium sulfate no further components.
- the polycarbonate compositions contain
- compositions contain no further components, that is to say consist of these components A) to E).
- the diglycerol ester used is preferably diglycerol monolauryl ester, if appropriate with further diglycerol esters.
- expanded graphite is used in the compositions according to the invention.
- the compositions in which flowability is improved according to the invention are preferably used for the production of moldings. Because of the improved flowability, they are particularly suitable for the production of thin components.
- the melt viscosities of the compositions are highly dependent on the amount of graphite used. As the amount increases, the melt viscosity also increases at different shear rates, determined in accordance with ISO 11443 (cone-and-plate arrangement, ISO 11443: 2014- 04).
- the melt viscosities determined at 340 ° C. and a shear rate of 1000 1 / s are preferably below 300 Pa.s, more preferably below 200 Pa.s.
- polycarbonate is understood as meaning both homopolycarbonates and copolycarbonates, in which case the polycarbonates may be linear or branched in a known manner.
- Polycarbonates may be linear or branched in a known manner.
- Mixtures of polycarbonates may also be used according to the invention.
- a part, up to 80 mol%, preferably from 20 mol% up to 50 mol%, of the carbonate groups in the polycarbonates used according to the invention may be replaced by aromatic dicarboxylic acid ester groups.
- aromatic polyester carbonates Such polycarbonates, which contain both acid residues of carbonic acid and acid residues of aromatic dicarboxylic acids incorporated into the molecular chain, are referred to as aromatic polyester carbonates. They are subsumed in the context of the present invention under the generic term of the thermoplastic, aromatic polycarbonates.
- Substitution of the carbonate groups by the aromatic dicarboxylic ester groups is essentially stoichiometric and also quantitative, so that the molar ratio of the reactants is also found in the finished polyester carbonate.
- the incorporation of the aromatic dicarboxylic acid ester groups can be carried out both statistically and in blocks.
- thermoplastic polycarbonates including the thermoplastic aromatic polyester carbonates have average molecular weights M w (determined by measuring the relative viscosity at 25 ° C in CH 2 Cl 2 and a concentration of 0.5 g per 100 ml CH 2 Cl 2) of 20,000 g / mol to 32,000 g / mol , preferably from 23,000 g / mol to 31,000 g / mol, in particular from 24,000 g / mol to 31,000 g / mol.
- the preparation of the polycarbonates which are contained in the compositions, to which diglycerol ester is added to improve the flowability, is carried out in a known manner from diphenols, carbonic acid derivatives, optionally chain terminators and branching agents.
- the preparation of aromatic polycarbonates is carried out, for example, by reacting diphenols with carbonyl halides, preferably phosgene, and / or with aromatic dicarboxylic acid dihalides, preferably benzenedicarboxylic acid dihalides, by the interfacial method, optionally using chain terminators and optionally using trifunctional or more than trifunctional branching agents, for the preparation the polyester carbonates a part of the carbonic acid derivatives is replaced by aromatic dicarboxylic acids or derivatives of dicarboxylic acids, depending on the extent to be replaced in the aromatic polycarbonates Carbonat Designtechniken by aromatic Dicarbon Anlagenreester Modelltechniken.
- preparation via a melt polymerization process by reaction of diphenols with, for example, diphenyl carbonate is possible.
- Dihydroxyaryl compounds suitable for the preparation of polycarbonates are those of the formula (2)
- Z is an aromatic radical having 6 to 30 carbon atoms, which may contain one or more aromatic nuclei, may be substituted and may contain aliphatic or cycloaliphatic radicals or alkylaryls or heteroatoms as bridge members.
- R 6 and R 7 independently of one another are H, cis to cis-alkyl, cis to cis-alkoxy, halogen, such as Cl or Br, or each optionally substituted aryl or aralkyl, preferably H or Ci to Cn-alkyl , particularly preferably represent H or Ci to Cs alkyl and very particularly preferably H or methyl, and X is a single bond, -SO 2, -CO-, -O-, -S-, Ci to Ce alkylene , C 2 - to C 5 -alkylidene or C 5 - to C 6 -cycloalkylidene which is C 1 -C 6 -alkyl, preferably methyl or
- X is preferably a single bond
- C is L to C 5 -alkylene, C 2 to C 5 -alkylidene, C 6 to C 6 -cycloalkylidene, -O-, -SO-, -CO-, -S-, - SO2 or for a radical of the formula (3a)
- diphenols for the preparation of the polycarbonates are hydroquinone, resorcinol, dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) cycloalkanes, bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) ether, bis ( hydroxyphenyl) ketones, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, a-a'-bis (hydroxyphenyl) diisopropylbenzenes, phthalimidines derived from isatin or phenolphthalein derivatives and their nuclear alkylated, nuclear-arylated and nuclear-halogenated compounds.
- Preferred diphenols are 4,4'-dihydroxydiphenyl, 2,2-bis (4-hydroxyphenyl) -propane (bisphenol A), 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1, 1-bis (4-hydroxyphenyl) -p-diisopropylbenzene, 2,2-bis (3-methyl-4-hydroxyphenyl) -propane, dimethyl-bisphenol A, bis (3,5-dimethyl-4-hydroxyphenyl) -methane, 2 , 2-bis (3,5-dimethyl-4-hydroxyphenyl) -propane, bis (3,5-dimethyl-4-hydroxyphenyl) sulfone, 2,4-bis (3,5-dimethyl-4-) hydroxyphenyl) -2-methylbutane, 1,1-bis- (3,5-dimethyl-4-hydroxyphenyl) -p-diisopropylbenzene and 1,1-bis (4-hydroxyphenyl) -3,3,5-
- diphenols are 2,2-bis- (4-hydroxyphenyl) -propane (bisphenol A), 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) -propane, 1,1-bis (4 -hydroxyphenyl) -cyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and dimethyl-bisphenol A.
- diphenols are, for example in US-A 3,028,635, US-A 2,999,825, US-A 3,148,172, US-A 2,991,273, US-A 3,271,367, US-A 4,982,014 and US-A 2,999,846, in DE-A 1 570 703, DE-A 2063 050, DE-A 2 036 052, DE-A 2 211 956 and DE-A 3 832 396, in FR-A 1 561 518, in the monograph "Fl. Schnell , Chemistry and Physics of Polycarbonates, Interscience Publishers, New York 1964 "and JP-A 62039/1986, JP-A 62040/1986 and JP-A 105550/1986.
- Suitable carbonic acid derivatives are, for example, phosgene or diphenyl carbonate.
- Suitable chain terminators that can be used in the preparation of the polycarbonates are monophenols.
- Suitable monophenols are, for example, phenol itself, alkylphenols such as cresols, p-tert-butylphenol, cumylphenol and mixtures thereof.
- Preferred chain terminators are the phenols which are mono- or polysubstituted by C 1 - to C 30 -alkyl radicals, linear or branched, preferably unsubstituted, or substituted by tert-butyl.
- Particularly preferred chain terminators are phenol, cumylphenol and / or p-tert-butylphenol.
- the amount of chain terminator to be used is preferably 0.1 to 5 mol%, based on moles of diphenols used in each case.
- the addition of the chain terminators can be carried out before, during or after the reaction with a carbonic acid derivative.
- Suitable branching agents are the trifunctional or more than trifunctional compounds known in polycarbonate chemistry, especially those having three or more than three phenolic OH groups.
- Suitable branching agents are, for example, 1,3,5-tri (4-hydroxyphenyl) benzene, 1,1,1-tris (4-hydroxyphenyl) ethane, tri- (4-hydroxyphenyl) -phenyl methane, 2,4- Bis (4-hydroxyphenylisopropyl) phenol, 2,6-bis (2-hydroxy-5'-methylbenzyl) -4-methylphenol, 2- (4-hydroxyphenyl) -2- (2,4-dihydroxyphenyl) propane, tetra (4-hydroxyphenyl) methane, tetra (4- (4-hydroxyphenylisopropyl) phenoxy) methane and 1,4-bis - ((4 ', 4 "-dihydroxytriphenyl) methyl) benzene and 3,3-bis (3-methyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole.
- the amount of optionally used branching agent is preferably 0.05 mol% to 2.00 mol%), based on moles of diphenols used in each case.
- the branching agents may either be initially charged with the diphenols and the chain terminators in the aqueous alkaline phase or may be added dissolved in an organic solvent prior to phosgenation. In the case of the transesterification process, the branching agents are used together with the diphenols.
- Particularly preferred polycarbonates are the homopolycarbonate based on bisphenol A, the homopolycarbonate based on l, 3-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane and the Copolycarbonates based on the two monomers bisphenol A and l, l-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane.
- Preferred methods of preparation of the polycarbonates to be used according to the invention, including the polyester carbonates, are the known interfacial process and the known process
- component A is preferably used in the form of powders, granules or mixtures of powders and granules.
- the amount of the aromatic polycarbonate Al is preferably, based on the total amount of polycarbonate, 25.0 to 85.0 wt .-%, preferably 28 , 0 to 84.0 wt .-%, particularly preferably 30.0 to 83.0 wt .-%, wherein said aromatic polycarbonate based on bisphenol a having a preferred melt volume-flow rate MVR 7 to 15 cm 3/10 min , more preferably with a melt volume flow rate MVR of 8 to 12 cmVIO min and particularly preferably with a melt volume flow rate MVR of 8 to 11 cmVIO min, determined according to ISO 1133
- the amount of the powdery aromatic polycarbonate A2 is preferably, based on the total amount of polycarbonate, 3.0 to 12.0 wt .-%, preferably 4.0 to 11.0 wt .-%, particularly preferably 5 to 10.0 wt %, wherein this aromatic polycarbonate is preferably based on bisphenol A with a preferred melt volume flow rate MVR of 3 to 8 cmVIO min, more preferably with a melt volume flow rate MVR of 4 to 7 cm 710 min, and particularly preferably with a melt Volume flow rate MVR of 6 cm 710 min, determined according to ISO 1133 (test temperature 300 ° C, mass 1.2 kg, DIN EN ISO 1133-1: 2012-03).
- compositions according to the invention 20 to 94.8% by weight, preferably 60 to 89.8% by weight, more preferably 65 to 85% by weight, particularly preferably 74.0 to 85.0% by weight, most preferably 74.0 to 79.6 wt .-% of aromatic polycarbonate used.
- Component B is preferably 60 to 89.8% by weight, more preferably 65 to 85% by weight, particularly preferably 74.0 to 85.0% by weight, most preferably 74.0 to 79.6 wt .-% of aromatic polycarbonate used.
- Graphites are used in the form of fibers, rods, spheres, hollow spheres, platelets and / or in powder form, both in aggregated and in agglomerated form, preferably in platelet form, in the compositions.
- a particle with a platelet-shaped structure is understood according to the invention to mean a particle which has a flat geometry. Thus, the height of the particles is usually significantly lower compared to the width or length of the particles. Such flat particles may in turn be agglomerated or aggregated into entities.
- expanded graphite alone or in admixture with unexpanded graphite, more preferably only expanded graphite.
- the individual basal planes of the graphite are separated by a special treatment, resulting in an increase in volume of the graphite, preferably by a factor of 200 to 400 results.
- the production of expanded graphites is described, inter alia, in the documents US Pat. No. 1,137,373 A, US Pat. No. 1,191,383 A and US Pat. No. 3,404,061 A.
- an expanded graphite having a relatively high specific surface area (expanded graphite scales), determined as the BET surface area by means of nitrogen adsorption according to ASTM D3037.
- the diglycerol esters used as flow improvers are esters of carboxylic acids with diglycerol. In this case, esters based on various carboxylic acids are suitable. Also, different isomers of diglycerol can form base for the esters. In addition to monoesters and multiple esters of diglycerol can be used. Instead of pure compounds and mixtures can be used. Isomers of diglycerol, which form the basis for the diglycerol esters used according to the invention, are the following:
- diglycerol esters used according to the invention it is possible to use those isomers of these formulas which have been singly or multiply esterified.
- Mixtures which can be used as flow aids consist of the diglycerol educts and ester end products derived therefrom, for example with the molecular weights 348 g / mol (monolauryl ester) or 530 g / mol (dilauryl ester).
- the diglycerol esters according to the invention contained in the composition are preferably derived from saturated or unsaturated monocarboxylic acids having a chain length of 6 to 30 carbon atoms.
- Suitable monocarboxylic acids are, for example, caprylic acid (C7H15COOH, octanoic acid), capric acid (C9H19COOH, decanoic acid), lauric acid (C11H23COOH, dodecanoic acid), myristic acid (C13H27COOH, tetradecanoic acid), palmitic acid (C15H31COOH, hexadecanoic acid), margaric acid (C16H33COOH, heptadecanoic acid), stearic acid (C17H35COOH, Octadecanoic acid), arachic acid (C19H39COOH, eicosanoic acid), behenic acid (C21H43COOH, docosanoic acid), lignoceric acid (C
- At least one ester of the formula (I) is particularly preferably
- n is an integer and R 'is a branched alkyl radical or a branched or unbranched alkenyl radical and GJ n + i is an aliphatic, saturated linear alkyl radical,
- N is preferably an integer of 6-24, so that GJ hn + i, for example, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-dodecyl, n-tridecyl, n-tetradecyl , n-hexadecyl or n-octadecyl.
- n 8 to 18, more preferably 10 to 16, most preferably 12 (diglycerol monolaurate isomer having the molecular weight 348 g / mol, which is particularly preferred as the main product in a mixture).
- the abovementioned ester groups are preferably also present in the other isomers of diglycerol.
- Preferred diglycerol esters have an HLB value of at least 6, particularly preferably 6 to 12, the HLB value being understood as meaning the so-called “hydrophilic-lipophilic balance", which is calculated according to the Griffin method as follows:
- HLB 20 x (1 - MiipopMi / M), where Miipophii is the molecular weight of the lipophilic portion of the diglycerol ester and M is the molecular weight of the diglycerol ester.
- compositions of the invention optionally contain one or more thermal and / or transesterification stabilizers.
- thermal stabilizers are preferably, tris (2,4-di-tert-butylphenyl) phosphite (Irgafos ® 168), tetrakis triphenylphosphine are (2,4-di-tert-butylphenyl) - [l, l-biphenyl] -4 , diylbisphosphonit 4'-, octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate (Irganox ® 1076), bis (2,4-dicumylphenyl) pentaerythritol diphosphite (Doverphos S-9228 ® -PC), bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite
- Irganox ® B900 mixture of Irgafos ® 168 and Irganox ® 1076 in the ratio 1: with Irganox ® B900 and Irganox ® 1076 3) or Doverphos ® S-9228-PC.
- transesterification stabilizers preferably phosphates or sulfonic acid esters are included.
- triisooctyl phosphate is included as a stabilizer.
- the heat stabilizers and / or transesterification stabilizers are preferably used in an amount of up to 1.0% by weight, more preferably in a total amount of 0.003 to 0.2% by weight.
- further conventional additives optionally up to 10.0 wt .-%, preferably 0.10 to 8.0 wt .-%, particularly preferably 0.2 to 3.0 wt .-% further conventional additives ("further additives").
- the group of further additives does not include any heat stabilizers or transesterification stabilizers, since these are already described as component C.
- Such additives as are customarily added in the case of polycarbonate-containing compositions are, in particular, those described in EP-A 0 839 623, WO-A 96/15102, EP-A 0 500 496 or "Plastics Additives Handbook", Hans Zweifel, 5th Edition 2000, Hanser Verlag, Kunststoff flame retardants, antidrippers, antioxidants, carbon black and / or dyes, inorganic fillers such as titanium dioxide, silicates, talc and / or barium sulfate and / or mold release agents, in the amounts customary for polycarbonate.
- These additives may be used individually or in
- the composition is preferably free of mold release agents, for example glycerol monostearate (GMS), since the diglycerol ester itself acts as a mold release agent.
- GMS glycerol monostearate
- the preparation of the polycarbonate compositions containing components A to C and optionally D and / or E is carried out by conventional incorporation methods by combining, mixing and homogenizing the individual components, wherein in particular the homogenization preferably takes place in the melt under the action of shear forces.
- the merging and mixing takes place before the melt homogenization using powder premixes. It is also possible to use premixes of granules or granules and powders with components B to E. It is also possible to use premixes which have been prepared from solutions of the mixture components in suitable solvents, if appropriate homogenizing in solution and subsequently removing the solvent.
- the components B to E of the composition according to the invention can be introduced into the polycarbonate by known processes or as a masterbatch.
- composition according to the invention can be combined, mixed, homogenized and then extruded in conventional apparatus such as screw extruders (for example twin-screw extruder, ZSK), kneaders, Brabender or Banbury mills. After extrusion, the extrudate can be cooled and comminuted. Individual components can also be premixed and then the remaining starting materials can be added individually and / or likewise mixed.
- the merging and mixing of a premix in the melt can also be done in the plasticizing an injection molding machine.
- the melt is transferred in the subsequent step directly into a shaped body.
- the production of the plastic moldings is preferably carried out by injection molding.
- thermally conductive polycarbonate compositions to which diglycerol ester is added for flow improvement are for the manufacture of components for the electrical and electronics industry for thermal management, in particular for complex heat sinks, cooling plates, heat sinks and housing in lighting technology such. As lamps or headlights suitable. Examples
- the polycarbonate compositions described in the following examples were prepared by compounding on a ZE 25 extruder from Berstorff at a rate of 10 kg / h.
- the melt temperature was 275 ° C.
- Component A-2 powder of a linear polycarbonate based on bisphenol A with a
- Component C Poem DL-100 (diglycerol monolaurate) from Riken Vitamin as
- Component D triisooctyl phosphate (TOF) from Lanxess AG as
- melt volume flow rate (MVR) was carried out according to ISO 1133 (at a test temperature of 300 ° C, mass 1.2 kg, DIN EN ISO 1133-1: 2012-03) with the Zwick 4106 Zwick Roell.
- Table 1 shows that the compositions to which diglycerol ester according to the invention was added, surprisingly show a significant improvement in the melt viscosity, measured at different measurement temperatures at different shear rates. With sufficiently high diglycerol ester addition, the compositions show significantly reduced melt viscosities even over the entire shear range at different measurement temperatures, which means improved flowability.
- Table 2 shows that even small amounts of diglycerol ester have a visible effect on the melt volume flow rate MVR graphite-containing polycarbonate compositions. Since the graphite contents of compositions B4 to B6 are relatively high, the melt volume flow rates are still relatively low. The melt viscosities, measured at different measurement temperatures at different shear rates, are improved as the amount of diglycerol ester increases.
- Table 3 shows that diglycerol esters have a significant influence on the melt viscosities of graphite-containing polycarbonate compositions.
- Examples B7 to B9 and BIO to B12 show significantly reduced melt viscosities compared to V3 and V4, even at higher graphite content.
- free fields mean that the compositions were so free-flowing that determination of the melt viscosity could no longer take place.
- the glass transition temperatures (T g ) remain in a high range (T g > 125 ° C).
- Table 4 shows that diglycerol ester has a marked influence on the
- Examples B15, B16, B17 and B18 show markedly reduced melt viscosities in comparison to V5 or V6.
- the glass transition temperatures remain in a high range (T g > 125 ° C).
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/742,631 US10472516B2 (en) | 2015-07-08 | 2016-07-05 | Improving the flowability of thermoconductive polycarbonate compositions |
| JP2018500474A JP6953394B2 (ja) | 2015-07-08 | 2016-07-05 | 熱伝導性ポリカーボネート組成物の流動性の改善 |
| CN201680040271.7A CN107810237A (zh) | 2015-07-08 | 2016-07-05 | 改进导热聚碳酸酯组合物的可流动性 |
| KR1020187000226A KR20180029024A (ko) | 2015-07-08 | 2016-07-05 | 열 전도성 폴리카르보네이트 조성물의 유동성 개선 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15175789.5 | 2015-07-08 | ||
| EP15175789.5A EP3115408B1 (de) | 2015-07-08 | 2015-07-08 | Verbesserung der fliessfähigkeit von thermisch leitfähigen polycarbonatzusammensetzungen |
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| Publication Number | Publication Date |
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| WO2017005735A1 true WO2017005735A1 (de) | 2017-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2016/065825 Ceased WO2017005735A1 (de) | 2015-07-08 | 2016-07-05 | Verbesserung der fliessfähigkeit von thermisch leitfähigen polycarbonatzusammensetzungen |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US10472516B2 (de) |
| EP (1) | EP3115408B1 (de) |
| JP (1) | JP6953394B2 (de) |
| KR (1) | KR20180029024A (de) |
| CN (1) | CN107810237A (de) |
| ES (1) | ES2667345T3 (de) |
| TW (1) | TW201716504A (de) |
| WO (1) | WO2017005735A1 (de) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018134371A1 (de) | 2017-01-23 | 2018-07-26 | Covestro Deutschland Ag | GRAPHIT-HALTIGE POLYCARBONAT-ZUSAMMENSETZUNGEN ENTHALTEND EIN NEUARTIGES FLIEßHILFSMITTEL |
| WO2018149831A1 (de) | 2017-02-14 | 2018-08-23 | Covestro Deutschland Ag | Verfahren zur herstellung eines gegenstands mittels eines additiven fertigungsverfahrens unter einsatz eines polycarbonat-aufbaumaterials mit verbesserter fliessfähigkeit |
| WO2018164666A1 (en) | 2017-03-07 | 2018-09-13 | Covestro Llc | Two shot injection molding process for thermoplastic parts |
| EP3499119A1 (de) | 2017-12-18 | 2019-06-19 | Covestro Deutschland AG | Vorrichtung zum ableiten von wärme von einer wärmequelle und verwendung dieser vorrichtung |
| EP3588665A1 (de) | 2018-06-29 | 2020-01-01 | Covestro Deutschland AG | Vorrichtung zum ableiten von wärme aus einer anordnung aus wiederaufladbaren elektrochemischen energiespeichern |
| WO2021076561A1 (en) | 2019-10-15 | 2021-04-22 | Covestro Llc | Three part headlamp assembly |
| WO2025174788A1 (en) | 2024-02-13 | 2025-08-21 | Covestro Llc | Insert molding and in-mold coating over substrates with pressure sensitive elements |
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2016
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11279812B2 (en) | 2017-01-23 | 2022-03-22 | Covestro Deutschland Ag | Graphite-containing polycarbonate compositions containing a new type of flow promoter |
| CN110177831B (zh) * | 2017-01-23 | 2022-04-29 | 科思创德国股份有限公司 | 含有流动助剂的含石墨的聚碳酸酯组合物 |
| KR20190103221A (ko) * | 2017-01-23 | 2019-09-04 | 코베스트로 도이칠란트 아게 | 새로운 유형의 유동 촉진제를 함유하는 흑연-함유 폴리카르보네이트 조성물 |
| WO2018134371A1 (de) | 2017-01-23 | 2018-07-26 | Covestro Deutschland Ag | GRAPHIT-HALTIGE POLYCARBONAT-ZUSAMMENSETZUNGEN ENTHALTEND EIN NEUARTIGES FLIEßHILFSMITTEL |
| KR102506183B1 (ko) * | 2017-01-23 | 2023-03-07 | 코베스트로 도이칠란트 아게 | 새로운 유형의 유동 촉진제를 함유하는 흑연-함유 폴리카르보네이트 조성물 |
| CN110177831A (zh) * | 2017-01-23 | 2019-08-27 | 科思创德国股份有限公司 | 含有新型流动助剂的含石墨的聚碳酸酯组合物 |
| WO2018149831A1 (de) | 2017-02-14 | 2018-08-23 | Covestro Deutschland Ag | Verfahren zur herstellung eines gegenstands mittels eines additiven fertigungsverfahrens unter einsatz eines polycarbonat-aufbaumaterials mit verbesserter fliessfähigkeit |
| US11472099B2 (en) | 2017-02-14 | 2022-10-18 | Covestro Deutschland Ag | Method for producing an object by means of an additive manufacturing process using a polycarbonate building material with improved flowability |
| WO2018164666A1 (en) | 2017-03-07 | 2018-09-13 | Covestro Llc | Two shot injection molding process for thermoplastic parts |
| WO2019121197A1 (de) | 2017-12-18 | 2019-06-27 | Covestro Deutschland Ag | Vorrichtung zum ableiten von wärme von einer wärmequelle und verwendung dieser vorrichtung |
| EP3499119A1 (de) | 2017-12-18 | 2019-06-19 | Covestro Deutschland AG | Vorrichtung zum ableiten von wärme von einer wärmequelle und verwendung dieser vorrichtung |
| EP3588665A1 (de) | 2018-06-29 | 2020-01-01 | Covestro Deutschland AG | Vorrichtung zum ableiten von wärme aus einer anordnung aus wiederaufladbaren elektrochemischen energiespeichern |
| WO2021076561A1 (en) | 2019-10-15 | 2021-04-22 | Covestro Llc | Three part headlamp assembly |
| WO2025174788A1 (en) | 2024-02-13 | 2025-08-21 | Covestro Llc | Insert molding and in-mold coating over substrates with pressure sensitive elements |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201716504A (zh) | 2017-05-16 |
| US10472516B2 (en) | 2019-11-12 |
| US20180201780A1 (en) | 2018-07-19 |
| CN107810237A (zh) | 2018-03-16 |
| EP3115408A1 (de) | 2017-01-11 |
| EP3115408B1 (de) | 2018-01-31 |
| KR20180029024A (ko) | 2018-03-19 |
| JP2018519405A (ja) | 2018-07-19 |
| ES2667345T3 (es) | 2018-05-10 |
| JP6953394B2 (ja) | 2021-10-27 |
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