Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
  • C08L25/02—Homopolymers or copolymers of hydrocarbons
  • C08L25/04—Homopolymers or copolymers of styrene
  • C08L25/08—Copolymers of styrene
  • C08L25/12—Copolymers of styrene with unsaturated nitriles
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
  • C08L25/02—Homopolymers or copolymers of hydrocarbons
  • C08L25/16—Homopolymers or copolymers of alkyl-substituted styrenes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
  • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
  • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
  • C08L71/02—Polyalkylene oxides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2300/00—Characterised by the use of unspecified polymers
  • C08J2300/22—Thermoplastic resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2201/00—Properties
  • C08L2201/04—Antistatic
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
  • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials

Definitions

• Thermoplastic molding compound with high puncture resistance and good antistatic behavior is thermoplastic molding compound with high puncture resistance and good antistatic behavior
• the equipment increases the internal lubrication of the molding compounds, which improves the processing range in the Injection molding leads.
• the molecular weight of the block Y can be 1200 to 3650, the proportion of ethylene oxide units being 10 to 30% by weight.
• EP-A-0 125 801 it is known to provide polymer blends of polycarbonate and impact-resistant styrene / acrylonitrile copolymer to improve the processing range with the aforementioned three-block copolymers of the formula X-Y-X.
• the molecular weight of the polypropylene oxide block Y can be, for example, 1200, 2250 or 3600.
• the proportion of ethylene oxide is 10 or 40% by weight.
• the object of the present invention is to provide impact-resistant copolymers of styrene and / or x-methylstyrene with acrylonitrile which have increased puncture resistance and at the same time have good antistatic behavior.
• the object is achieved by a molding compound composed of the components Abis C and optionally D,
• a hard component composed of one or more copolymers of styrene and / or ⁇ -methylstyrene with acrylonitrile, the proportion of acrylonitrile being 10 to 50% by weight, as component A,
• b 5 to 70% by weight of at least one graft copolymer B.
• bl 10 to 90% by weight of at least one rubber-elastic particulate graft base with a glass transition temperature below 0 ° C. as component B1 and
• b2 10 to 90% by weight of at least one graft pad from a copolymer of styrene and / or ⁇ -methylstyrene with acrylonitrile, the The proportion of acrylonitrile is 10 to 50% by weight, as component B2,
• c 0.1 to 10% by weight of at least one three-block copolymer of the formula X-Y-X with a central block Y composed of propylene oxide units with an average molecular weight in the range from 2,000 to 4,000 and terminal
• d 0 to 10% by weight, based on the total weight of components A to C, of further customary auxiliaries and fillers as component D.
• Molding compositions suitable for finishing with components A, B and D are described, for example, in DE-A-29 01 576 and in particular in DE-A-197 28 629, which is older and not prepublished.
• the component of acrylonitrile in component A is preferably 10 to 50% by weight, particularly preferably 15 to 40% by weight, in particular 18.5 to 36% by weight.
• component B the proportion of component B1 is preferably 20 to 80% by weight, particularly preferably 25 to 75% by weight, the proportion of component B2 is preferably 20 to 80% by weight, particularly preferably 25 to 75% by weight %.
• the proportion of acrylonitrile in component B2 is preferably 15 to 40% by weight, particularly preferably 15 to 35% by weight.
• the average molecular weight of block Y is from
• Propylene oxide units preferably 2200 to 3800, particularly preferably 2300 to 53500, in particular approximately 2300, approximately 2750 or approximately 3250, each +/- 10%.
• the average proportion of the terminal blocks X composed of ethylene oxide units, based on component C, is preferably 3 to 28
• % By weight, particularly preferably 8 to 24% by weight, in particular approximately 8 to 14 or approximately 18 to 24% by weight.
• Component A preferably has a viscosity number VZ (determined according to DIN 15 53726 at 25 ° C., 0.5% by weight in dimethylformamide) of 50 to 120 ml / g, particularly preferably 52 to 110 ml / g and in particular 55 to 105 ml / g on. It is particularly preferably a styrene acrylonitrile copolymer. Such copolymers are obtained in a known manner by bulk, solution, suspension, precipitation or emulsion polymerization, bulk and solution polymerization being preferred. Details of these processes are described, for example, in the plastics handbook, edited by R. Vieweg and G Daumiller, volume V "Polystyrol", Carl-Hanser-Verlag Kunststoff 1969, page 118 ff.
• VZ viscosity number
• Component B is a graft copolymer with a rubber-elastic particulate graft base with a glass transition temperature below 0 ° C.
• the graft base can be selected from all known suitable chewing-elastic polymers. It is preferably ABS (acrylonitrile / butadiene / styrene), ASA (acrylonitrile / styrene / alkyl acrylate), EPDM, Siloxane or other rubbers.
• Component B1 is preferably at least one (co) polymer
• bll 60 to 100 wt .-%, preferably 70 to 100 wt .-% of at least one conjugated diene, C ⁇ - ⁇ o-alkyl acrylate or mixtures thereof as
• Component B1 different monoethylenically unsaturated monomers as component B 12 and b1: 0 to 10% by weight, preferably 0 to 6% by weight, of at least one crosslinking monomer as component B13.
• conjugated dienes B1 in particular butadiene, isoprene, chloroprene or mixtures thereof as well as the Ci-io-alkyl acrylates listed below and mixtures thereof come into consideration.
• component B12 may contain monomers which vary the mechanical and thermal properties of the core within a certain range.
• monoethylenically unsaturated comonomers are styrene, substituted styrenes, acrylonitrile, methacrylonitrile, acrylic acid,
• Methacrylic acid dicarboxylic acids such as maleic acid and fumaric acid and their
• Anhydrides such as maleic anhydride, nitrogen-functional monomers such as dimethylaminoethyl acrylate, diethylaminoethyl acrylate, vinylimidazole,
• Acrylic acid and methacrylic acid such as phenyl acrylate, phenyl methacrylate, Benzyl acrylate, benzyl methacrylate, 2-phenylethyl acrylate, 2-phenylethyl methacrylate, 2-phenoxyethyl acrylate and 2-phenoxyethyl methacrylate, N-substituted maleimides such as N-methyl, N-phenyl and N-cyclohexylmaleimide, unsaturated ethers such as vinyl methyl ether and mixtures thereof.
• N-substituted maleimides such as N-methyl, N-phenyl and N-cyclohexylmaleimide
• unsaturated ethers such as vinyl methyl ether and mixtures thereof.
• Styrene, ⁇ -methylstyrene, n-butyl acrylate, methyl methacrylate or mixtures thereof are preferably used as component B12, in particular styrene and n-butyl acrylate or mixtures thereof, especially styrene.
• component B12 in particular styrene and n-butyl acrylate or mixtures thereof, especially styrene.
• the proportion of component B1 is preferably 70 to 99.9, particularly preferably 90 to 99% by weight and the proportion of component B12 0.1 to 30, particularly preferably 1 to 10% by weight.
• Butadiene / styrene and n-butyl acrylate styrene copolymers in the stated amount range are particularly preferred.
• crosslinking monomers of component B13 are divinyl compounds such as divinylbenzene, diallyl compounds such as diallyl maleate, allyl esters of acrylic and methacrylic acid, dihydrodicyclopentadienyl acrylate (DCPA), divinyl esters of dicarboxylic acids such as succinic acid and adipic acid, diallyl deseller and divinyl alcohol and butane-1,4-diols.
• the graft B2 is preferably a styrene / acrylonitrile copolymer.
• the graft copolymers B are usually prepared by the emulsion polymerization process. Polymerization is generally carried out at a temperature of 20 to 100, preferably 30 to 80 ° C. Common emulsifiers are often used, for example alkali metal salts of alkyl or alkylarylsulfonic acids, alkyl sulfates, fatty alcohol sulfonates, salts of higher fatty acids with 10 to 30 carbon atoms, sulfosuccinates, ether sulfonates or resin soaps. The alkali metal salts, in particular the sodium or potassium salts of alkyl sulfonates or fatty acids having 10 to 18 carbon atoms, are preferably used. As a rule, the emulsifiers are used in amounts of 0.5 to 5% by weight, in particular 0.5 to 3% by weight, based on the monomers used in the preparation of the graft base.
• Sufficient water is preferably used to prepare the dispersion so that the finished dispersion has a solids content of 20 to 50% by weight. Usually a water / monomer ratio of 2: 1 to 0.7: 1 is used.
• radical formers which decompose at the selected reaction temperature are suitable for starting the polymerization reaction, that is to say both those which decompose thermally on their own and those which do so in the presence of a redox system.
• Free radical formers for example peroxides such as preferably peroxosulfates (for example sodium or potassium persulfate) and azo compounds such as azodiisobutyronitrile are preferably suitable as polymerization initiators.
• redox systems in particular those based on hydroperoxides such as cumene hydroperoxide, can also be used.
• the polymerization initiators are used in an amount of 0.1 to 1% by weight, based on the graft base monomers.
• the radical formers and also the emulsifiers are added to the reaction batch, for example discontinuously as a total amount at the beginning of the reaction, or divided into several portions, batchwise at the beginning and at one or more later times, or continuously during a certain time interval.
• the continuous addition can also take place along a gradient, e.g. can be ascending or descending, linear or exponential, or also stepwise (stair function).
• Molecular weight regulators such as ethylhexylthioglycolate, n- or t- Use dodecyl mercaptan or other mercaptans, terpinols and dimeric methylstyrene or other compounds suitable for regulating the molecular weight.
• the molecular weight regulators are added batchwise or continuously to the reaction mixture, as was described above for the radical formers and emulsifiers.
• buffer substances such as Na 2 HPO 4 / NaH 2 PO 4 , sodium hydrogen carbonate or buffer based on citric acid / citrate can also be used. Regulators and buffer substances are used in the usual quantities, so that further details are not necessary.
• the graft base can also be produced by polymerizing the monomers B1 in the presence of a finely divided latex (so-called “seed latex mode of operation" of the polymerization).
• This latex is introduced and can consist of monomers forming rubber-elastic polymers, or also of other monomers, as already mentioned.
• Suitable seed latices consist, for example, of polybutadiene or polystyrene.
• the graft base B1 can be produced in the so-called feed process.
• a certain proportion of the monomers is introduced and the polymerization is started, after which the remainder of the monomers (“feed fraction”) B1 are added as feed during the polymerization.
• feed fraction the remainder of the monomers
• the feed parameters shape of the gradient, amount, duration, etc.
• the statements made regarding the addition of the radical start or emulsifier also apply here analogously.
• Graft polymers with several "soft” and “hard” shells are also suitable.
• the precise polymerization conditions, in particular the type, quantity and dosage of will emulsifier and of the other polymerization auxiliaries preferably selected so that the latex of the graft polymer B obtained has a mean particle size, defined by the d 5 o of the particle size, from 80 to 800 microns, preferably 80 to 600 nm and particularly preferably 85 to 400 nm.
• the reaction conditions are coordinated with one another in such a way that the polymer particles have a bimodal particle size distribution, that is to say a size distribution with two more or less pronounced maxima.
• the bimodal particle size distribution is preferably achieved by a (partial) agglomeration of the polymer particles. This can be done, for example, as follows: The monomers which form the core are polymerized up to a conversion of usually at least 90%, preferably greater than 95%, based on the monomers used. This turnover is usually reached after 4 to 20 hours.
• the rubber latex obtained has an average particle size d 50 of at most 200 nm and a narrow particle size distribution (almost monodisperse system).
• the rubber latex is agglomerated. This is usually done by adding a dispersion of an acrylic ester polymer.
• a copolymer of 96% ethyl acrylate and 4% methacrylamide is particularly preferred.
• the agglomerating dispersion can optionally also contain several of the acrylic ester polymers mentioned.
• the concentration of the acrylic ester polymers in the dispersion used for agglomeration should generally be between 3 and 40% by weight.
• 0.2 to 20, preferably 1 to 5 parts by weight of the agglomeration dispersion per 100 parts of the rubber latex, in each case calculated on solids, are used.
• the agglomeration is carried out by adding the agglomerating dispersion to the rubber.
• the rate of addition is normally not critical, generally it takes about 1 to 30 minutes at a temperature between 20 and 90 ° C, preferably between 30 and 75 ° C.
• the rubber latex can also be agglomerated by other agglomerating agents such as acetic anhydride. Agglomeration by pressure or freezing (pressure or freeze agglomeration) is also possible. The methods mentioned are known to the person skilled in the art.
• the rubber particles Under the conditions mentioned, only a part of the rubber particles is agglomerated, so that a bimodal distribution is produced. After agglomeration there are generally more than 50, preferably between 75 and 95% of the particles (number distribution) in the non-agglomerated state.
• the partially agglomerated rubber latex obtained is relatively stable, so that it can be easily stored and transported without coagulation occurring.
• the graft B2 can be produced under the same conditions as the preparation of the graft base B1, the B2 being able to be produced in one or more process steps. For example, at In a two-stage grafting process, polymerize styrene or ⁇ -methylstyrene alone and then styrene and acrylonitrile in two successive steps. This two-stage grafting (first styrene, then styrene / acrylonitrile) is a preferred embodiment. Further details on the preparation of the graft polymers B are described in DE-A 12 60 135 and 31 49 358 and EP-A-0 735 063.
• graft polymerization on the graft base B1 again in an aqueous emulsion. It can be carried out in the same system as the polymerization of the graft base, and further emulsifier and initiator can be added. These need not be identical to the emulsifiers or initiators used to prepare the graft base B1. For example, it may be expedient to use a persulfate as the initiator for the preparation of the graft base B1, but to use a redox initiator system for the polymerization of the graft shell B2. For the rest, what has been said for the preparation of the graft base B1 applies to the choice of emulsifier, initiator and polymerization auxiliaries.
• the monomer mixture to be grafted on can be added to the reaction mixture all at once, batchwise in several stages or, preferably, continuously during the polymerization.
• the three-block copolymers of the formula XYX used according to the invention can be prepared in a manner known per se (N. Schönfeldt, surface-active ethylene oxide adducts, scientific publishing company mbH Stuttgart, 1976, page 53 ff) by polymerization, initially producing a medium-sized polypropylene oxide block Y. one end of each block Ethylene oxide units is attached.
• the molecular weights given above are generally the average molecular weights (number average M n , for example determined from the OH number according to DIN 53240).
• Preferred three-block copolymers and their preparation are also described in EP-A-0 125 801 and EP-A-0 018 591.
• auxiliaries and fillers can be used as component D.
• Such substances are, for example, lubricants or mold release agents, waxes, pigments, dyes, flame retardants, antioxidants, light stabilizers, fibrous and powdery fillers or reinforcing agents or antistatic agents, and also other additives or mixtures thereof.
• Suitable lubricants and mold release agents are e.g. Stearic acids, stearyl alcohol, stearic acid esters or amides as well as silicone oils, montan waxes and waxes based on polyethylene and polypropylene.
• Pigments are, for example, titanium dioxide, phthalocyanines, ultramarine blue, iron oxides or carbon black, as well as the entire class of organic pigments.
• Dyes are to be understood as all dyes which can be used for the transparent, semi-transparent or non-transparent decolorization of polymers, in particular those which are suitable for coloring styrene copolymers. Dyes of this type are known to the person skilled in the art.
• Flame retardants which can be used are, for example, the halogen-containing or phosphorus-containing compounds known to the person skilled in the art, magnesium hydroxide and other customary compounds or mixtures thereof. Likewise red phosphorus suitable.
• Suitable antioxidants are, in particular, sterically hindered mononuclear or multinuclear phenolic antioxidants, which can be substituted in various ways and can also be bridged via substituents. In addition to monomers, this also includes oligomeric compounds, which can be made up of several phenolic base bodies. Hydroquinones and hydroquinone analogs and substituted compounds are also suitable, as are antioxidants based on tocopherols and their derivatives. Mixtures of different antioxidants can also be used. In principle, all commercially available compounds or compounds suitable for styrene copolymers can be used, such as Topanol® or Irganox®.
• Suitable light stabilizers are e.g. various substituted resorcinols, salicylates, benzotriazoles, benzophenones, HALS (hindered amine light stabilizers), such as those e.g. are commercially available as Tinuvin.
• fibrous or powdered fillers are carbon or glass fibers in the form of glass fabrics, glass mats or glass silk rovings, cut glass, glass balls and WoUastonit, particularly preferably glass fibers. If glass fibers are used, they can be equipped with a size and an adhesion promoter for better compatibility with the blend components. The glass fibers can be incorporated both in the form of short glass fibers and in the form of endless strands (rovings).
• Carbon black, amorphous silica, magnesia are suitable as particulate fillers.
• sium carbonate (chalk) powdered quartz, mica, mica, bentonite, talc, feldspar or in particular calcium silicates such as WoUastonit and kaolin.
• the molding compositions are preferably produced by producing the individual components A to C and, if appropriate, D separately and then mixing the components.
• Suitable processes for producing the molding compositions are described, for example, in EP-A-0 135 801, EP-B-0 018 591 and in particular DE-A-197 28 628.
• the molding compositions according to the invention can be used for the production of moldings, fibers or films. Such processes for the production of moldings, fibers or films are listed in the specified publications.
• 43120 g of the monomer mixture specified in Table 1 are in the presence of 432 g of tert-dodecyl mercaptan (TDM), 311 g of potassium salt of C 2 -C 2 o-fatty acids, 82 g of potassium persulfate, 147 g of sodium hydrogen carbonate and 58400 g of water at 65 ° C polymerized to a polybutadiene latex.
• TDM tert-dodecyl mercaptan
• 311 g of potassium salt of C 2 -C 2 o-fatty acids 311 g of potassium salt of C 2 -C 2 o-fatty acids
• 82 g of potassium persulfate 147 g of sodium hydrogen carbonate
• 58400 g of water at 65 ° C polymerized to a polybutadiene latex.
• the procedure was as described in EP-A-0 062 901, Example 1, page 9, line 20 - page 10, line 6. The conversion was 95% or
• n-butyl acrylate polymer is used as the graft base B1
• the procedure is as in EP-A-0 735 063, Examples VI, V2, 14 V and 15 V.
• the graft polymer dispersion obtained with a bimodal particle size distribution had an average particle size d 50 of 150 to 350 nm and a d 90 value of 400 to 600 nm. A first maximum of the particle size distribution was in the range of 50 to 150 nm, a second maximum in the range of 200 to 600 nm.
• the dispersion obtained was mixed with an aqueous dispersion of an antioxidant and then coagulated by adding a magnesium sulfate solution.
• the coagulated rubber was centrifuged off from the dispersion water and washed with water. A rubber with about 30% by weight of adhering or enclosed residual water was obtained.
• thermoplastic polymers A were prepared by the process of continuous solution polymerization, as described in the plastics handbook, ed. R. Vieweg and G Daumiller, volume V "Polystyrol", Carl-Hanser-Verlag Kunststoff 1969, pp 122-124 .
• Table 3 summarizes the compositions and properties.
• the graft rubber B containing residual water was dried with warm air in a vacuum and mixed intimately with the further component A in an extruder, type ZSK 30 from Werner and Pfleiderer, at 250 ° C. and 250 min ⁇ 1 with a throughput of 10 kg h.
• the molding compound was extruded and the molten polymer mixture was subjected to rapid cooling by introducing it into a 30 ° C water bath.
• the solidified molding compound was granulated. 4. Measurements taken
• Swelling index of the graft base B1 A film was produced from the aqueous dispersion of the graft base by evaporating the water. 0.2 g of this film was mixed with 50 g of toluene. After 24 hours the toluene was aspirated from the swollen sample and the sample weighed out. After drying the sample in vacuo at 110 ° C. for 16 hours, it was weighed out again. The following were calculated:
• the average particle size d is the weight average of the particle size, as determined by means of an analytical ultracentrifuge according to the method of W. Scholtan and H. Lange, Kolloid-Z. and Z.-Polymer 250 (1972) pages 782 to 796.
• the ultracentrifuge measurement provides the integral mass distribution of the particle diameter of a sample. From this it can be seen what percentage by weight of the particles have a diameter equal to or smaller than a certain size.
• the dio value indicates the particle diameter in which 10% by weight of all particles have a smaller and 90% by weight a larger diameter. Conversely, for the d9o-value that 90 wt .-% of all particles have a smaller, and 10 wt .-% have a larger diameter than the diameter which corresponds to the d 9 o value.
• Viscosity number VZ it was determined according to DIN 53726 on a 0.5% by weight solution of the polymer in dimethylformamide.
• test specimens were produced from the granules of the molding compounds, namely standard small bars (see DIN 53453), shoulder bars, round disks with a diameter of 60 mm and 2 mm or rectangular disks with a thickness of 2 mm .
• the melt temperature was 250 ° C. in each case and the mold temperature in each case 60 ° C., unless stated otherwise.
• Vicat The heat resistance according to Vicat was determined on pressed platelets according to ISO 306 / B with a load of 50 N and a heating rate of 50 K / h.
• the penetration work aD was determined according to ISO 6603-2 on round disks or rectangular disks 40 x 40 mm by the plastic test at 23 ° C, whereby the test specimens were produced at 250 melting temperature.
• Dust chamber test The dust is whirled up in a dust chamber for 10 seconds. Coarse dirt is blown off and the formation of stamen is assessed visually.

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