A blend comprising a polyarylene ethersulfone polymer having less than 0.05% by weight of OH-terminated groups and talc having a volume-average particle size of less than 10 μm.

Abstract

The present invention relates to a blend comprising, as a component, 50 to 85% by weight of at least one polyarylene ethersulfone polymer (P1) having less than 0.05% by weight of OH-terminated groups, and a volume-average particle size (D) less than 10 μm. [4,3] The present invention relates to a blend comprising 15 to 50% by weight of talc (P2) having ). Another aspect of the present invention is a film made from the blend, and the use of the blend or film in electrical insulation applications. A further another aspect of the present invention is an electronic device comprising a metal conductor and the blend or film, wherein the blend or film electrically insulates the metal conductor at least partially.

Description

[Technical Field]

[0001] The present invention relates to a blend comprising, as a component, 50 to 85% by weight of at least one polyarylene ethersulfone polymer (P1) having less than 0.05% by weight of OH-terminated groups, and a volume-average particle size (D) less than 10 μm. [4,3] The present invention relates to a blend comprising 15 to 50% by weight of talc (P2) having ). Another aspect of the present invention is a film made from the blend, and the use of the blend or film in electrical insulation applications. A further another aspect of the present invention is an electronic device comprising a metal conductor and the blend or film, wherein the blend or film electrically insulates the metal conductor at least partially.

[0002] Polyarylene ethersulfone polymers belong to a group of high-temperature resistant polymers that exhibit high heat resistance, excellent mechanical properties, and inherent flame retardancy (EM Koch, H.-M. Walter, Kunststoffe 80 (1990) 1146; E. Doering, Kunststoffe 80, (1990) 1149, N. Inchaurondo-Nehm, Kunststoffe 2008 190).

[0003] In challenging applications, polyarylene ethersulfone polymers are reinforced with fibers or fillers, particularly glass fibers. This typically results in a significant increase in stiffness and strength, but reduces the product's fluidity, and the compound's melt stability is lower compared to the unreinforced matrix material.

[0004] For applications in the E&E segment, polyarylene ethersulfone polymer compounds with high continuous operating temperatures, good processing behavior, and improved comparative tracking index (CTI) are of interest.

[0005] European Patent Application Publication No. 2594610 describes blends based on polyarylene ethersulfone polymers and semi-aromatic polyamides having improved CTI. Unfortunately, such compounds have low flame retardancy and may not reach V-0 in UL-94 testing.

[0006] European Patent No. 2256167 describes flame retardant compounds having phosphonates as flame retardants. These compounds have poor processing stability at high temperatures.

[0007] German Patent Application Publication No. 102019214712 deals with flame retardant compounds having improved CTI. These compounds have the problem of high water absorption rates because they contain a large amount of polyamide.

[0008] Therefore, there is a need to provide new blends based on polyarylene ethersulfone polymers that have improved mechanical properties, excellent processability, and good flame retardancy.

[0009] The purpose is a blend, and the ingredients are (P1) At least one polyarylene ethersulfone polymer having less than 0.05% by weight of OH-terminated groups, (P2) Volume-average particle size less than 10 μm (D [4,3] ) Talc and Includes, The blend contains an ingredient (P1) in an amount ranging from 50 to 85% by weight and an ingredient (P2) in an amount ranging from 15 to 50% by weight. The weight percentage values ​​are all based on the total weight of the blend. This is achieved through blending.

[0010] Surprisingly, it has been found that the blend according to the present invention has improved mechanical performance, excellent processability, good CTI value, and good flame retardant properties. The blend can be used for producing films. The blend and films produced therefrom are suitable for use in electrical insulation applications; for example, the blend or film can be used for electrical insulation of metal conductors. The blend or film can be used for producing electronic devices comprising metal conductors, and the blend or film at least partially electrically insulates the metal conductors. Furthermore, the film or blend can be used as a slot liner for wrapping metal coils, preferably copper coils.

[0011] The present invention is described in more detail below.

[0012] Component (P1) The blend comprises, as component (P1), at least one polyarylene ether sulfone polymer having less than 0.05% by weight of OH end groups. As used herein, the terms "component (P1)" and "at least one polyarylene ether sulfone polymer having less than 0.05% by weight of OH end groups" are used synonymously and therefore preferably have the same meaning.

[0013] As used herein, "at least one polyarylene ether sulfone polymer having less than 0.05% by weight of OH end groups" means exactly one polyarylene ether sulfone polymer having less than 0.05% by weight of OH end groups, or a mixture of two or more different polyarylene ether sulfone polymers each having less than 0.05% by weight of OH end groups.

[0014] In particular, the polyarylene ether sulfone polymer can be formed firstly by a hydroxide method in which a salt is formed from a dihydroxy component and a hydroxide, or can be formed by a carbonate method.

[0015] General information regarding the formation of polyarylene ethersulfone polymers by the hydroxide method can be found, in particular, in RN Johnson et.al., J.Polym. Sci. A-1 5 (1967) 2375, while the carbonate method is described in JE McGrath et.al., Polymer 25 (1984) 1827.

[0016] Methods for forming polyarylene ethersulfone polymers from aromatic bishalogen compounds and aromatic bisphenols or salts thereof in an aprotic solvent in the presence of one or more alkali metals or carbonate or ammonium bicarbonate are known to those skilled in the art and are described, for example, in European Patent Application Publication No. 297363 and European Patent Application Publication No. 135130.

[0017] High-performance thermoplastics such as polyarylene ethersulfone polymers are typically formed by polycondensation reactions carried out at high reaction temperatures in dipolar aprotic solvents, such as DMF, DMAc, sulfolane, DMSO, and NMP.

[0018] European Patent Application Publication No. 0412499 describes a method for forming polyarylene ethersulfone polymers. The dihalogen components used in the method of European Patent Application Publication No. 0412499 are, for example, 4,4'-dichlorodiphenylsulfone or 4,4'-difluorodiphenylsulfone. Dihydroxy components described in European Patent Application Publication No. 0412499 include bisphenol A, 4,4'-dihydroxydiphenylsulfone, and 4,4'-dihydroxybenzophenone. The polycondensation described in European Patent Application Publication No. 0412499 is carried out in the presence of sodium carbonate or sodium bicarbonate.

[0019] Preferred embodiments for preparing a suitable polyarylene sulfone polymer that can be used as component (P1) are described below.

[0020] In a preferred embodiment, component (P1) is reaction mixture (R G ) which comprises, as components, (A1) a dihalogen component comprising at least one dihalogen compound selected from the group consisting of 4,4'-dichlorodiphenyl sulfone and 4,4'-difluorodiphenyl sulfone in an amount of 80% by weight or more based on the total weight of component (A1) in reaction mixture (R G ), (B1) a dihydroxy component comprising at least one dihydroxy compound selected from the group consisting of 4,4'-dihydroxydiphenyl sulfone, bisphenol A, 4,4'-dihydroxybiphenyl, and hydroquinone in an amount of 80% by weight or more based on the total weight of component (B1) in reaction mixture (R G ) obtained by converting a reaction mixture (R G ) comprising the above components.

[0021] Accordingly, another object of the present invention is a blend, wherein (component (P1)) contained in the blend is obtained by converting a reaction mixture (R G ) comprising the following as components. (A1) a dihalogen component comprising at least one dihalogen compound selected from the group consisting of 4,4'-dichlorodiphenyl sulfone and 4,4'-difluorodiphenyl sulfone in an amount of 80% by weight or more based on the total weight of component (A1) in reaction mixture (R G ), (B1) a dihydroxy component comprising at least one dihydroxy compound selected from the group consisting of 4,4'-dihydroxydiphenyl sulfone, bisphenol A, 4,4'-dihydroxybiphenyl, and hydroquinone in an amount of 80% by weight or more based on the total weight of component (B1) in reaction mixture (R G )

[0022] Component (P1) is preferably obtained from a reaction mixture (R GIt is formed by the conversion of ). Component (A1) and component (B1) will react with each other in the polycondensation reaction. Component (D) acts as a solvent. Component (C) acts as a base that deprotonates component (B1) during the condensation reaction.

[0023] Reaction mixture (R G ) is a mixture that is preferably used to form component (P1). Therefore, the reaction mixture (R G All details herein relating to the mixture present before polycondensation. Polycondensation is carried out during the method of the present invention, and the reaction mixture (R) is formed by the polycondensation of components (A1) and (B1). G ) is converted to the target product component (P1). The mixture obtained after polycondensation, which contains the target product component (P1), is the product mixture (P G It is also called ).

[0024] Generally, reaction mixture (R G The components of ) can be reacted together. The individual components can be mixed in a previous step and then reacted. It is also possible to supply the individual components to a reactor, where they can be mixed and then reacted.

[0025] In the method of the present invention, the reaction mixture (R G The individual components of (A1) are generally converted together. This conversion preferably occurs in a single step. That is, the deprotonation of component (B1) and the condensation reaction between components (A1) and (B1) occur in a single reaction step without the isolation of intermediates, such as the deprotonated species of component (B1).

[0026] Ingredients (A1) Component (A1), also called the dihalogen component, reacts with the mixture (R) in the form of at least one dihalogen compound. G ) is present in. In this specification, "at least one dihalogen compound" means exactly one dihalogen compound, or a mixture of two or more dihalogen compounds.

[0027] Therefore, component (A1) may include not only a single dihalogen compound, but also a mixture of two or more different dihalogen compounds.

[0028] Preferably, component (A1) is the reaction mixture (R G Based on the total weight of component (A1) in the mixture, it contains at least 50% by weight of at least one dihalogen compound selected from the group consisting of 4,4'-dichlorodiphenyl sulfone and 4,4'-difluorodiphenyl sulfone. Here, the weight percentage for component (A1) further relates to the sum of the 4,4'-dichlorodiphenyl sulfone and the 4,4'-difluorodiphenyl sulfone used. 4,4'-dichlorodiphenyl sulfone is preferred over 4,4'-difluorodiphenyl sulfone. 4,4'-dichlorodiphenyl sulfone is particularly preferred.

[0029] In one embodiment, component (A1) is the reaction mixture (R G Based on the total weight of component (A1) in the mixture, it contains at least 80% by weight, preferably 90% by weight, and more preferably 95% by weight, of at least one dihalogen compound selected from the group consisting of 4,4'-dichlorodiphenyl sulfone and 4,4'-difluorodiphenyl sulfone. Here, the weight percentage for component (A1) further relates to the sum of the 4,4'-dichlorodiphenyl sulfone and 4,4'-difluorodiphenyl sulfone used.

[0030] In one particularly preferred embodiment, component (A1) contains 50% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more, and especially 95% by weight or more of 4,4'-dichlorodiphenyl sulfone.

[0031] Reaction mixture (R G It is even more preferable that the compound (A1) does not contain any further dihalogen compounds in addition to the dihalogen compound of component (A1).

[0032] In a further particularly preferred embodiment, component (A1) comprises 4,4'-dichlorodiphenylsulfone.

[0033] Ingredients (B1) The component (B1), also called the dihydroxy component, reacts with the mixture (R) in the form of at least one dihydroxy compound. G ) is present in. In this specification, "at least one dihydroxy compound" means exactly one dihydroxy compound, or a mixture of two or more dihydroxy compounds.

[0034] Therefore, component (B1) may include not only a single dihydroxy compound, but also a mixture of two or more different dihydroxy compounds.

[0035] In one embodiment, component (B1) is the reaction mixture (R G Based on the total weight of component (B1) in the mixture, it contains at least 50% by weight of at least one dihydroxy compound selected from the group consisting of 4,4'-dihydroxydiphenylsulfone, bisphenol A (2,2-bis(4-hydroxyphenyl)propane), 4,4'-dihydroxybiphenyl, and hydroquinone. Here, the weight percentage for component (B1) further relates to the sum of 4,4'-dihydroxydiphenylsulfone, bisphenol A (2,2-bis-(4-hydroxyphenyl)propane), 4,4'-dihydroxybenzophenone, and hydroquinone used. Of the above-mentioned dihydroxy compounds, 4,4'-dihydroxydiphenylsulfone, bisphenol A, and 4,4'-dihydroxybiphenyl are preferred, while 4,4'-dihydroxydiphenylsulfone is particularly preferred.

[0036] In one embodiment, component (B1) is the reaction mixture (R GBased on the total weight of component (B1) in the mixture, it contains 80% or more by weight, preferably 90% or more by weight, and more preferably 95% or more by weight of at least one dihydroxy compound selected from the group consisting of 4,4'-dihydroxydiphenylsulfone, bisphenol A (2,2-bis(4-hydroxyphenyl)propane), 4,4'-dihydroxybiphenyl, and hydroquinone. Here, the weight percentage for component (B1) further relates to the sum of 4,4'-dihydroxydiphenylsulfone, bisphenol A (2,2-bis-(4-hydroxyphenyl)propane), 4,4'-dihydroxybiphenyl, and hydroquinone used.

[0037] In one particularly preferred embodiment, component (B1) contains 50% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more, and especially 95% by weight or more of bisphenol A.

[0038] In one particularly preferred embodiment, component (B1) contains 50% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more, and especially 95% by weight or more of 4,4'-dihydroxydiphenyl sulfone.

[0039] In one particularly preferred embodiment, component (B1) contains 50% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more, and especially 95% by weight or more of 4,4'-dihydroxybiphenyl.

[0040] Reaction mixture (R G It is even more preferable that the compound (B1) does not contain any further dihydroxy compounds in addition to the dihydroxy compound of component (B1).

[0041] In a further particularly preferred embodiment, component (B1) comprises 4,4'-dihydroxydiphenylsulfone.

[0042] Reaction mixture (R G Since ) contains potassium carbonate as component (C), the hydroxyl group of the dihydroxy compound used as component (B1) is in a deprotonated form in the reaction mixture (RG ) It may be partially present within it.

[0043] Ingredients (C) Reaction mixture (R G The compound contains potassium carbonate, also known as a carbonate component, as component (C). The potassium carbonate used is preferably anhydrous.

[0044] In a preferred embodiment, component (C) is the reaction mixture (R G It contains 90% or more potassium carbonate by weight, based on the total weight of component (C) in it.

[0045] In one embodiment, component (C) is the reaction mixture (R G Based on the total weight of component (B1) in the given material, it contains 80% or more by weight, preferably 90% or more by weight, and more preferably 98% or more by weight of potassium carbonate having a volume average particle size of less than 50 μm.

[0046] The molar ratio of component (C) to component (B) is generally in the range of 1.03 to 2.0, preferably in the range of 1.05 to 1.5.

[0047] In one particularly preferred embodiment, component (C) is potassium carbonate.

[0048] Ingredients (D) Reaction mixture (R G Preferably, component (D) comprises at least one aprotic polar solvent. In the present invention, "at least one aprotic polar solvent" means exactly one aprotic polar solvent and a mixture of two or more aprotic polar solvents.

[0049] Useful aprotic polar solvents include, for example, anisole, dimethylformamide, dimethyl sulfoxide, sulfolane, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, and mixtures thereof.

[0050] N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, and mixtures thereof are preferred for use as aprotic polar solvents. N-methyl-2-pyrrolidone is particularly preferred for use as aprotic polar solvent.

[0051] In a preferred embodiment, component (D) is the reaction mixture (R G The mixture contains at least 90% by weight of at least one solvent selected from the group consisting of N-methyl-2-pyrrolidone and N-ethyl-2-pyrrolidone, based on the total weight of component (D) in the mixture. N-methyl-2-pyrrolidone is particularly preferred for use as component (D).

[0052] In one preferred embodiment, component (D) consists of N-methyl-2-pyrrolidone, also known as NMP or N-methylpyrrolidone.

[0053] In a further preferred embodiment, the reaction mixture does not contain any additional aprotic polar solvents in addition to the aprotic polar solvent of component (D).

[0054] To form a polyarylene ethersulfone polymer, preferably, the reaction mixture (R G The reaction is carried out under carbonate conditions. The reaction involved is a polycondensation reaction, generally carried out at a temperature in the range of 80 to 250°C, preferably in the range of 100 to 220°C, with the upper temperature limit determined by the boiling point of the aprotic polar solvent (component D) at atmospheric pressure (10¹³.25 mbar). The reaction is preferably carried out at atmospheric pressure. The reaction time interval is preferably in the range of 0.5 to 12 hours, particularly in the range of 2 to 10 hours.

[0055] At least one polyarylene ethersulfone polymer (component (P1)) has less than 0.05% by weight of OH-terminated groups, preferably less than 0.04% by weight, more preferably less than 0.03% by weight, and particularly preferably less than 0.02% by weight of OH-terminated groups. The amount of OH-terminated groups is determined by potentiometric titration of each component (P1) in dimethylformamide as a solvent.

[0056] The amount of OH-terminal groups in component (P1) depends on two factors, namely the reaction mixture (R G This can be controlled by the molar ratio of component (B1) to component (A1) in the mixture, and the degree of etherification of the polyarylene ethersulfone polymer obtained after polycondensation.

[0057] Reaction mixture (R G The molar ratio of component (B1) to component (A1) in the mixture is preferably in the range of 0.97 to 1.03, more preferably in the range of 0.98 to 1.02, and particularly preferably in the range of 0.985 to 1.015.

[0058] If the polyarylene ethersulfone polymer obtained after polycondensation contains an excessive amount of OH-terminal groups, making it unsuitable as component (P1), the amount of OH-terminal groups can be reduced by etherification to RO-terminal groups, preferably CH3O-terminal groups.

[0059] The terminal groups of polyarylene ethersulfone polymers depend on the reaction conditions and the molar ratio of components (A1) and (B1), as described above, and are generally halogen groups, particularly chlorine groups, OH groups, or etherified groups, particularly alkyl ether groups. Etherified terminal groups can be obtained by reacting terminal OH / phenoxide groups (OH terminal groups) with a suitable etherifying agent.

[0060] The amount of chlorine terminal groups can be determined by elemental analysis. The amount of CH3O terminal groups is 1 This can be determined by 1H-NMR.

[0061] Suitable etherifying agents include monofunctional alkyl or aryl halides, such as C1-C6 alkyl chlorides, bromides, or iodides, preferably methyl chloride, or benzyl chloride, bromide, or iodide, or mixtures thereof. The terminal groups of the polyarylene ethersulfone polymer according to the present invention are preferably halogen groups, particularly chlorine, and alkoxy groups, particularly methoxy, aryloxy groups, particularly phenoxy, or benzyloxy.

[0062] The polyarylene ethersulfone polymer obtained by the present invention can be isolated by precipitation of the polymer solution in water or in a mixture of water and a further solvent, such as an alcohol. Subsequently, the precipitated polyarylene ethersulfone polymer can be extracted with water and then dried. In one embodiment of the present invention, precipitation may occur in an acidic medium. Suitable acids include, for example, organic or inorganic acids, such as carboxylic acids such as acetic acid, propionic acid, succinic acid, or citric acid, and mineral acids such as hydrochloric acid, sulfuric acid, or phosphoric acid.

[0063] Suitable methods for forming the aforementioned polyarylene ethersulfone polymers are known to those skilled in the art, for example, on pages 2-8 of the chapter "Polysulfones" in Herman F. Mark's "Encyclopedia of Polymer Science and Technology," third edition, Volume 4, 2003, and on pages 427-443 of "Aromatic Polyethers" in Hans R. Kricheldorf's "Handbook of Polymer Synthesis," second edition, 2005.

[0064] A preferred polyarylene ethersulfone polymer usable as component (P1) comprises at least one of the following building blocks Ia to Ic as a structural repeating unit. [ka]

[0065] It is particularly preferable that the polyarylene ethersulfone polymer usable as component (P1) is substantially composed of at least one type of building block selected from the group consisting of Ia, Ib, and Ic.

[0066] Furthermore, polyarylene ethersulfone polymers that can be used as component (P1) consisting of repeating units of formula Ib are particularly preferred. Polyethersulfone (PESU) is another name for these polyarylene ethersulfone polymers.

[0067] The abbreviations PESU and PSU used herein conform to DIN EN ISO 1043-1 (Plastics - Symbols and abbreviated terms - Part 1: Basic polymers and their special characteristics (ISO 1043-1:2001); German version of EN ISO 1043-1:2002).

[0068] Furthermore, block copolymers or other copolymers constructed from repeating units of formulas Ia, Ib, and Ic are particularly preferred.

[0069] The weight-average molecular weight (M) of the polyarylene ethersulfone polymer (usable as component (P1)) obtained by the above method W The weight-average molecular weight (M) is generally in the range of 10,000 to 150,000 g / mol, preferably in the range of 15,000 to 120,000 g / mol, and more preferably in the range of 18,000 to 100,000 g / mol. W The measurement is performed using gel permeation chromatography (GPC). Dimethylacetamide (DMAc) was used as the solvent and a narrowly distributed polymethyl methacrylate was used as the standard.

[0070] Preferably, a polyarylene ether sulfone polymer (component (P1)) having a viscosity number (VN) of 40 to 120 ml / g measured in N-methyl-2-pyrrolidone (NMP) at 25°C according to ISO 1628 is preferred.

[0071] In a preferred embodiment, the blend comprises, as component (P1), at least one polyarylene ethersulfone polymer selected from the group consisting of polysulfone (PSU), polyethersulfone (PESU), and polybiphenylsulfone (PPSU).

[0072] In a particularly preferred embodiment, the polyarylene ethersulfone polymer (component (P1)) included in the blend is polyethersulfone (PESU).

[0073] Ingredients (P2) The blend according to the present invention has a volume-average particle size (D) of less than 10 μm as component (P2). [4,3] Contains talc having ) . In this specification, "component (P2)" and "volume average particle size (D) less than 10 μm" [4,3] The term "talc having )" is used as a synonym and therefore preferably has the same meaning.

[0074] Talc, also known as talcam, preferably has the chemical formula Mg3Si4O 10 It is a clay mineral composed of hydrated magnesium silicate containing (OH)2.

[0075] The talc used as component (P2) has a volume average particle size (D) of less than 10 μm, preferably less than 9 μm, more preferably less than 8 μm, and most preferably less than 7 μm. [4,3] ) has a volume-average particle size (D [4,3]The particle size is determined by laser diffraction, as described in "A basic guide to particle characterization," Malvern Instruments Ltd., 2015. Laser diffraction can measure particle sizes in the range of 10 nm to 10 mm.

[0076] Ingredients (P3) In one embodiment, the blend comprises, as component (P3), at least one polyarylene ethersulfone polymer having more than 0.1% by weight of OH-terminated groups. In this specification, the terms "component (P3)" and "at least one polyarylene ethersulfone polymer having more than 0.1% by weight of OH-terminated groups" are used synonymously and therefore preferably have the same meaning.

[0077] In this specification, "at least one polyarylene ethersulfone polymer having more than 0.1% by weight of OH-terminated groups" means exactly one polyarylene ethersulfone polymer having more than 0.1% by weight of OH-terminated groups, or a mixture of two or more different polyarylene ethersulfone polymers having more than 0.1% by weight of OH-terminated groups.

[0078] Therefore, with respect to component (P3), the explanation and preferences given earlier for component (P1) apply, except that the amount of OH terminal groups is different.

[0079] In a preferred embodiment, component (P3) is a reaction mixture (R) as described above in terms of component (P1). G It is obtained by converting ).

[0080] At least one polyarylene ethersulfone polymer (component (P3)) has more than 0.1% by weight of OH-terminal groups, preferably more than 0.11% by weight of OH-terminal groups, more preferably more than 0.12% by weight of OH-terminal groups, and particularly preferably more than 0.14% by weight of OH-terminal groups. The amount of OH-terminal groups is determined by potentiometric titration as described above.

[0081] Reaction mixture (R G The molar ratio of component (B1) to component (A1) in the mixture is preferably in the range of 1.01 to 1.03, more preferably in the range of 1.012 to 1.026, and particularly preferably in the range of 1.015 to 1.025.

[0082] Ingredients (P4) In one embodiment, the blend comprises, as component (P4), at least one fatty acid having 10 to 34 carbon atoms. In this specification, the terms “component (P4)” and “at least one fatty acid having 10 to 34 carbon atoms” are used synonymously and therefore preferably have the same meaning.

[0083] In this specification, "at least one fatty acid having 10 to 34 carbon atoms" means exactly one fatty acid having 10 to 34 carbon atoms, or a mixture of two or more different at least one fatty acid having 10 to 34 carbon atoms.

[0084] The fatty acid may be unbranched, branched, saturated, or unsaturated. Unbranched fatty acids are preferred as component (P4). Most preferably, unbranched saturated fatty acids having 10 to 34 carbon atoms, more preferably 12 to 26 carbon atoms, even more preferably 14 to 20 carbon atoms, and most preferably 16 to 20 carbon atoms are preferred as component (P4). A particularly preferred component (P4) is stearic acid. Stearic acid is commercially available, for example, from KLK Oleo. In particular, stearic acid with a purity of over 98% and a softening regime of 55 to 65°C is used.

[0085] blend The blend according to the present invention contains components (P1) and (P2), and optionally components (P3) and / or (P4).

[0086] In a preferred embodiment, the blend according to the present invention comprises 60-82% by weight, more preferably 60-81.9% by weight, particularly preferably 60-81.5% by weight, and most preferably 60-81.4% by weight of component (P1), based on the total weight of the blend.

[0087] In a preferred embodiment, the blend according to the present invention contains 18 to 40% by weight, more preferably 18 to 39.9% by weight, particularly preferably 18 to 39.5% by weight, and most preferably 18 to 39.4% by weight of component (P2), based on the total weight of the blend.

[0088] In a preferred embodiment, the blend according to the present invention contains 0.5 to 15% by weight, more preferably 0.5 to 7.5% by weight of component (P3), based on the total weight of the blend.

[0089] In another preferred embodiment, the blend according to the present invention comprises 0.1 to 2% by weight, more preferably 0.1 to 1.5% by weight, of component (P4) based on the total weight of the blend.

[0090] In a preferred embodiment, the blend is 60-82% by weight of the ingredients (P1), 18-40% by weight of ingredients (P2) The values ​​include [ingredients], and all weight percentages are based on the total weight of the blend.

[0091] For better, the blend is Ingredients (P1) at 60-81.9% by weight, 18-39.9% by weight of ingredients (P2), 0.1-2% by weight of the component (P4) The values ​​include [ingredients], and all weight percentages are based on the total weight of the blend.

[0092] For better, the blend is Ingredients (P1) at 60-81.5% by weight, 18-39.5% by weight of ingredients (P2), 0.5-15% by weight of ingredients (P3) The values ​​include [ingredients], and all weight percentages are based on the total weight of the blend.

[0093] Particularly preferred, the blend is 60-81.4% by weight of the ingredients (P1), 18-39.4% by weight of the ingredients (P2), 0.5-15% by weight of ingredients (P3), 0.1-2% by weight of the component (P4) The values ​​include [ingredients], and all weight percentages are based on the total weight of the blend.

[0094] Most preferably, the blend is 60-81.4% by weight of the ingredients (P1), 18-39.4% by weight of the ingredients (P2), 0.5-7.5% by weight of ingredients (P3), 0.1-1.5% by weight of ingredients (P4) The values ​​include [ingredients], and all weight percentages are based on the total weight of the blend.

[0095] The blends according to the present invention can be produced by compounding, for example, components (P1) and (P2), and optionally component (P3) and / or optionally component (P4), in a single-screw or twin-screw extruder (ZSK18), a Brabender mixer, a Banbury mixer, or a kneader, by methods known to those skilled in the art.

[0096] Molded parts prepared from the blend according to the present invention exhibit good mechanical properties, namely good modulus of elasticity, strength, tensile elongation, impact strength, and notched impact strength.

[0097] Furthermore, molded parts prepared from the blend according to the present invention exhibit a good comparative tracking index (CTI) and good flame retardancy. In addition, the blend according to the present invention exhibits good processing stability (melt stability).

[0098] Tensile testing is generally performed according to ISO 527 (modulus of elasticity, strength, and tensile elongation). Impact strength is generally tested according to ISO 179 1eU. Notched impact is generally tested according to ISO 179 1eA.

[0099] CTI is generally measured according to IEC 60112 using a sample with a thickness of 4 mm. Flame retardancy is generally tested according to UL 94 using a sample with a thickness of 1.6 mm.

[0100] The processing stability (melt stability) of the blend is 400°C and 1150s. -1 Viscosity is measured in the molten state at the shear rate. Viscosity is measured after 5 minutes and 30 minutes. Processing stability is the ratio of the viscosity at 30 minutes to the viscosity at 5 minutes.

[0101] The solution viscosity of the polyarylene ethersulfone polymer is preferably determined using a 0.01 g / ml solution in N-methylpyrrolidone at 25°C.

[0102] Another subject of the present invention is a film made from a blend according to the present invention as described above.

[0103] The film produced from the blend preferably has a thickness in the range of 10 to 500 μm, more preferably in the range of 12.5 to 400 μm, and particularly preferably in the range of 15 to 350 μm.

[0104] The preparation of films is known to those skilled in the art. Films can be prepared, for example, by film extrusion, as described above. Details relating to film extrusion are known in the art, for example, from Chris Rauwendaal, "Polymer extrusion", Hansa, 5th Edition 2014.

[0105] With its excellent CTI value, combined with superior mechanical stability and good flame retardancy, this blend and the films produced from it can be advantageously used in electrical insulation applications.

[0106] Therefore, another subject of the present invention is the use of the blend or film made from the blend according to the present invention in electrical insulation applications. In preferred embodiments, the blend or film made from the blend is used to electrically insulate a metal conductor.

[0107] In a preferred embodiment, the blend or a film made from the blend electrically insulates the surface of the metal conductor at least partially.

[0108] Another subject of the present invention is an electronic device comprising a metal conductor and a blend or a film made from a blend, wherein the blend or the film made from a blend electrically insulates the metal conductor at least partially.

[0109] An example of an electronic device is a cable comprising at least one metal wire covered by a blend or by a film made from a blend for electrical insulation of metal wires.

[0110] In a preferred embodiment, the electronic device comprises a metal coil, preferably a copper coil, encased in a slot liner made from the blend according to the present invention. In this embodiment, the individual wires contained within the metal coil are not encased in the blend or a film made from the blend, but the outer surface of the metal coil is encased in the blend or a film made from the blend according to the present invention. This outer encasing is also called a “slot liner”.

[0111] The present invention will be described more specifically by the following examples, but will not be limited thereto.

[0112] Ingredients used: Ingredients (P1) PESU1: Viscosity number (VN) of 49 ml / g (ISO 1628, NMP, 25℃), 0.19 wt% Cl-terminated group (determined by elemental analysis), 0.23 wt% CH3O-terminated group ( 1 Polyethersulfones having less than 0.02 wt% of OH-terminal groups (determined by potentiometric titration), and OH-terminal groups (determined by potentiometric titration).

[0113] Ingredients (P2) Talc 1: Average volume particle size (D) 5.7 μm [4,3] ) Talc Talc 2: Average volume particle size (D) 12.5 μm [4,3] ) Talc

[0114] Ingredients (P3) PESU2: A polyethersulfone with a viscosity number (VN) of 48.3 ml / g (ISO 1628, NMP, 25℃) and 0.22 wt% OH-terminated groups (determined by potentiometric titration).

[0115] Ingredients (P4) FA1: Stearic acid (softening regime at 55-60°C)

[0116] Ingredients (P2C) BV1: Glass fiber chopped strands (average length 4.5 mm, average diameter 10 μm, and polyurethane sizing)

[0117] Blend manufacturing and testing Compounding was performed using a twin-screw extruder (ZSK 18), and the barrel temperature was set to maintain a melting temperature below 380°C. The test samples were molded at a melting temperature of 360°C and a mold temperature of 140°C.

[0118] Tensile tests were performed in accordance with ISO 527 (modulus of elasticity, strength, and tensile elongation).

[0119] Impact strength was tested according to ISO 179 1eU, while notched impact was tested according to ISO 179 1eA.

[0120] CTI was measured according to IEC 60112 using a sample with a thickness of 4 mm. FR performance was tested according to UL-94 using a sample with a thickness of 1.6 mm.

[0121] To evaluate the processing stability (melt stability) of the blend, the viscosity of the molten material at 400°C was measured at 1150s. -1 Measurements were taken for 30 minutes at the specified shear rate. Table 1 shows the ratio of the values ​​measured at 5 minutes and 30 minutes.

[0122] The solution viscosity of polyaryl ethers was determined using a 0.01 g / ml solution in N-methylpyrrolidone at 25°C. The OH-terminal group content was measured by potentiometric titration in DMF.

[0123] [Table 1]

[0124] The compounds according to the present invention exhibit good mechanical properties and a unique combination of CTI value and FR behavior.

Claims

1. It is a blend, and as an ingredient, (P1) At least one polyarylene ethersulfone polymer having less than 0.05% by weight of OH-terminated groups, (P2) Volume-average particle size less than 10 μm (D ［４，３］ ) Talc and Includes, The blend comprises an amount of component (P1) in the range of 50 to 85% by weight and an amount of component (P2) in the range of 15 to 50% by weight. The weight percentage values ​​are all based on the total weight of the aforementioned blend. blend.

2. The blend according to claim 1, wherein the blend further comprises, as component (P3), at least one polyarylene ethersulfone polymer having more than 0.1% by weight of OH-terminated groups.

3. The blend according to claim 1 or 2, wherein the blend further comprises as component (P4) at least one fatty acid having 10 to 34 carbon atoms.

4. The at least one polyarylene ethersulfone polymer (component (P1)) reacts with the reaction mixture (R Ｇ ) and as an ingredient, (A1) The reaction mixture (R Ｇ Based on the total weight of component (A1) in ), the dihalogen component contains 80% by weight or more of at least one dihalogen compound selected from the group consisting of 4,4'-dichlorodiphenylsulfone and 4,4'-difluorodiphenylsulfone, (B1) The reaction mixture (R Ｇ Based on the total weight of component (B1) in the product, the dihydroxy component contains 80% by weight or more of at least one dihydroxy compound selected from the group consisting of 4,4'-dihydroxydiphenylsulfone, bisphenol A, 4,4'-dihydroxybiphenyl, and hydroquinone. Reaction mixture containing (R Ｇ A blend according to any one of claims 1 to 3, obtained by converting ).

5. The blend according to any one of claims 1 to 4, wherein the blend contains less than 10% by weight of polyamide based on the total weight of the blend.

6. The aforementioned blend, 60-82% by weight of the component (P1), 18-40% by weight of the component (P2) Includes, The blend according to any one of claims 1 to 5, wherein the weight percentage value is based on the total weight of the blend.

7. The aforementioned blend, 60-81.5% by weight of the component (P1), Components (P2) containing 18-39.5% by weight, 0.5 to 15% by weight of the component (P3) Includes, The blend according to any one of claims 1 to 5, wherein the weight percentage value is based on the total weight of the blend.

8. The aforementioned blend, 60-81.9% by weight of the component (P1), Components (P2) containing 18-39.9% by weight, 0.1-2% by weight of the component (P4) Includes, The blend according to any one of claims 1 to 5, wherein the weight percentage value is based on the total weight of the blend.

9. The aforementioned blend, 60-81.4% by weight of the component (P1), Components (P2) containing 18-39.4% by weight, 0.5 to 15% by weight of the component (P3), 0.1-2% by weight of the component (P4) Includes, The blend according to any one of claims 1 to 5, wherein the weight percentage value is based on the total weight of the blend.

10. A film made from the blend described in any one of claims 1 to 9.

11. The film according to claim 10, wherein the film has a thickness in the range of 10 to 500 μm.

12. Use of the blend according to any one of claims 1 to 9 or the film according to claim 10 or 11 for electrical insulation applications.

13. The use according to claim 12, wherein the blend or film is used to electrically insulate a metal conductor.

14. An electronic device comprising a metal conductor and a blend according to any one of claims 1 to 9 or a film according to claim 10 or 11, wherein the blend or the film electrically insulates the metal conductor at least partially.

15. The electronic device according to claim 14, wherein the electronic device is a metal coil, preferably a copper coil, wrapped in a slot liner made from a blend according to any one of claims 1 to 9 or a film according to claim 10 or 11.

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