EP1567581A1 - Schlagzähmodifizierte polymer-zusammensetzungen - Google Patents

Schlagzähmodifizierte polymer-zusammensetzungen

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Publication number
EP1567581A1
EP1567581A1 EP03772333A EP03772333A EP1567581A1 EP 1567581 A1 EP1567581 A1 EP 1567581A1 EP 03772333 A EP03772333 A EP 03772333A EP 03772333 A EP03772333 A EP 03772333A EP 1567581 A1 EP1567581 A1 EP 1567581A1
Authority
EP
European Patent Office
Prior art keywords
weight
parts
composition according
polymer
spoke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03772333A
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German (de)
English (en)
French (fr)
Inventor
Marc Vathauer
Gerwolf Quaas
Andreas Seidel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanxess Deutschland GmbH
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Lanxess Deutschland GmbH
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Priority claimed from DE2002154877 external-priority patent/DE10254877A1/de
Priority claimed from DE2002157077 external-priority patent/DE10257077A1/de
Application filed by Lanxess Deutschland GmbH filed Critical Lanxess Deutschland GmbH
Publication of EP1567581A1 publication Critical patent/EP1567581A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; 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
    • 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
    • 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
    • C08L51/06—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 homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • 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
    • C08K3/04—Carbon
    • 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
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/10—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C08L67/025—Polyesters derived from dicarboxylic acids and dihydroxy compounds containing polyether sequences

Definitions

  • the invention relates. Impact-modified polyamide compositions and molded parts made therefrom, which are particularly suitable for direct online painting without prior treatment of the molded part with an electrically conductive primer system, as well as the online coated molded parts.
  • DE-A 101 019 225 generally describes polymer compositions. Containing polyamide, graft polymer, vinyl (co) polymer, compatibility agent and very fine mineral particles with anisotropic particle geometry. DE-A 101 019 225 does not mention that the compositions described there can be painted online.
  • EP 0202 214 A discloses polymer blends made from a polyamide, a styrene / acrylonitrile copolymer and a compatibilizer.
  • a copolymer consisting of a vinyl aromatic monomer and acrylonitrile, methacrylonitrile, C- is used as a compatibilizer.
  • Increased impact strength is to be achieved through the use of compatibility agents.
  • a disadvantage of the polymer blends described in this publication is that they have too low a stiffness and a too high coefficient of expansion for thin-wall applications.
  • JP 11 241 016.A2 discloses polyamide molding compositions which, in addition to polyamide, contain rubber-modified styrene polymers, graft polymers based on ethylene / propylene rubbers and talc with a particle diameter of 1 to 4 ⁇ m.
  • EP-A 0 718 350 describes polymer blends consisting of a crystalline and an amorphous or semi-crystalline polymer and 2 to 7% by weight of electrically conductive Carbon (soot) for the production of molded, thermoplastic objects that are electrostatically painted in a further step. Highly heat-resistant polymer blends with conductive finish are not described here.
  • thermoplastic and elastomeric are antistatically treated
  • the antistatic agents consist of polyethers, polyesters, polyester ether amides, polyether esters or mixtures and copolymers of these as well as an organic or inorganic. Salt.
  • a large number of polymers are listed as thermoplastic and elastomeric polymers. However, the compositions of the present invention are not described.
  • antistatic compositions of polyether ester amides and polyether esters are described in WO 02/055411 and EP-A 613 919.
  • inorganic materials in certain polymer compositions, in particular in polycarbonate compositions, are also generally known.
  • the inorganic materials are used, for example, as reinforcing materials to increase the rigidity and tensile strength, to increase the dimensional stability in the event of temperature fluctuations, to improve the surface properties or - in flame-retardant materials - also as a flame retardant synergist. Both mineral and artificially obtained materials are used.
  • US Pat . No. 5,714,537 describes polycarbonate bi-ends which contain certain inorganic fillers to improve the rigidity and linear thermal expansion resistance.
  • WO 01/34703 discloses impact-modified polyethylene terephthalate / polycarbonate blends which are suitable for online coating. Polyamide blends are not described.
  • Noryl ® GTX from General Electric Plastics is known for some directly paintable inline applications (cf. EP-A 685 527). It is a
  • Blend containing polyamide and polyphenylene ether (PA / PPO blend).
  • Body parts made of plastics usually have to be painted.
  • the body attachments made from them are usually covered with one or more layers of transparent lacquer.
  • the body attachments made from them are coated with several layers of paint, with at least one of the layers giving color (top coat).
  • top coat Depending on the heat resistance of the plastics, a distinction is made here between different processes that differ at the time the plastic add-on parts are attached to the outer part of the body. If the plastic add-on parts go through the entire painting process, one speaks generally of an "online" painting, which places the highest demands on the heat resistance of the plastic.
  • the plastic add-on part is called the cathode dip painting (KTL) the outer part of the body is assembled and placed in the painting line.
  • KTL cathode dip painting
  • the entire plastic add-on part is painted outside the painting line at low temperatures and only then mounted on the outer part of the body.
  • the "online” process is preferred by the automotive industry because it minimizes the work steps and also achieves the best color matching of plastic and sheet metal. With this process, temperatures of up to 205 ° C are reached, so that high demands are placed on the Heat resistance of the molded part can be provided.
  • a plastic can be modified in such a way that its specific resistance becomes so low that it can be used in electrostatic painting without prior treatment with a conductive primer system, a production step is avoided.
  • plastic body parts Additional requirements placed on plastic body parts are good rigidity, low thermal expansion and post-vibration. dung, good surface quality, good paintability and good chemical resistance.
  • the molding compounds used to produce the exterior parts of the body must have good fluidity in the melt.
  • the task . was solved by containing a polymer composition
  • composition may contain, as further components, compatibilizer (component F) and / or vinyl (co) polymer (component G), phenolic
  • the invention furthermore also relates to the online lacquered moldings obtainable from the compositions mentioned above. It has been found that a plastic with the above composition shows excellent heat resistance and can therefore be used in "online” painting processes. It also has a Class-A surface, high rigidity and excellent chemical resistance.
  • Polyamides (component A) which are suitable according to the invention are known or can be prepared by processes known from the literature.
  • Polyamides suitable according to the invention are known homopolyamides, copolyamides and mixtures of these polyamides. These can be partially crystalline and or amorphous polyamides.
  • the partially crystalline polyamides are polyamide 6, polyamide
  • 6,6, mixtures and corresponding copolymers of these components are suitable.
  • partially crystalline polyamides the acid component of which is wholly or partly composed of terephthalic acid and / or isophthalic acid and / or suberic acid and / or sebacic acid and / or azelaic acid and / or adipic acid and / or cyclohexanedicarboxylic acid, the diamine component wholly or partly of m- and / or p-xylylenediamine and / or hexamethylenediamine and / or 2,2,4-trimethylhexamethylenediamine and / or 2,4,4-trimethymexamethylenediamine and / or isophoronediamine and the composition of which is known in principle.
  • polyamides which are wholly or partly prepared from lactams with 7 to 12 carbon atoms in the ring, optionally with the use of one or more of the above-mentioned starting components.
  • Particularly preferred partially crystalline polyamides are polyamide 6 and polyamide 6,6 and their mixtures.
  • Known products can be used as amorphous polyamides. They are obtained by polycondensation of diamines such as ethylenediamine, hexamethylenediamine, decamethylenediamine, 2,2,4- and / or 2,4,4-trimethylhexamemylenediamine, m- and / or p-xylylenediamine, bis- (4-aminocyclohexyl ) - methane, bis- (4-aminocyclohexyl) propane, 3,3'-dimethyl * -4,4'-diamino-dicyclohexyl-methane, 3 ** aminomethyl-3,5,5-trimethylcyclohexylamine, 2,5- and or 2,6-bis (aminomethyl) norbornane and / or 1,4-diaminomethylcyclohexane with dicarboxylic acids such as
  • Copolymers obtained by polycondensation of several monomers are also suitable, as are copolymers which are prepared with the addition of ammocarboxylic acids such as e-aminocaproic acid, w-aminoundecanoic acid or w-aminolauric acid or their lactams.
  • ammocarboxylic acids such as e-aminocaproic acid, w-aminoundecanoic acid or w-aminolauric acid or their lactams.
  • Particularly suitable amorphous polyamides are the polyamides made from isophthalic acid, hexamethylenediamine and other diamines such as 4,4-diaminodicyclohexylmethane, isophoronediamine, 2,2,4- and / or 2,4,4-trimethylhexa-methylenediamine, 2, 5- and / or 2,6-bis (aminomethyl) norbornene; or from isophthalic acid,
  • 4,4'-diamino-dicyclohexylmethane and ⁇ -caprolactam or from isophthalic acid, 3,3'-dimethyl-4,4 '- (hamino-dicyclohexylmethane and laurolactam; or from terephthalic acid and the isomer mixture of 2,2,4- and / or 2,4,4-trimethylhexamethylenediamine.
  • isophthalic acid 3,3'-dimethyl-4,4 '- (hamino-dicyclohexylmethane and laurolactam
  • terephthalic acid and the isomer mixture of 2,2,4- and / or 2,4,4-trimethylhexamethylenediamine instead of the pure 4,4'-diaminodicyclohexylmethane, it is also possible to use mixtures of the positional isomers diamine dicyclohexalmethane, which are composed of
  • the polyamides preferably have a relative viscosity (measured on a 1% strength by weight solution in m-cresol at 25 ° C.) from 2.0 to 5.0, particularly preferably from 2.5 to 4.0.
  • the polyamides can be contained in component A alone or in any mixture with one another.
  • Component B comprises one or more rubber-modified graft polymers.
  • the rubber-modified graft polymer B comprises a statistical (co) polymer made from vinyl monomers B.l, preferably according to B.l.l and B.l.2, and one grafted with vinyl monomers, preferably according to B.l.l and B.l.2
  • Rubber B.2. B is prepared in a known manner by free-radical polymerization, for example by an emulsion, bulk or solution or bulk suspension polymerization process, such as, for example, in US Pat. Nos. 3,243,481, 3,509,237, US Pat. A 3 660 535, US-A 4 221 833 and US-A 4 239 863.
  • Particularly suitable graft rubbers are also ABS polymers that pass through Redox initiation with an initiator system of organic hydroperoxide and ascorbic acid according to US Pat. No. 4,937,285 are available.
  • Preferred monomers B1 are styrene, ⁇ -methylstyrene, halogen- or alkyl nucleus-substituted styrenes such as p-methylstyrene, p-chlorostyrene, (meth) acrylic acid-C 8 -C 8 -alkyl esters such as methyl methacrylate, n-butyl acylate and tert-butyl acrylate.
  • Preferred monomers B1 are unsaturated nitriles such as acrylonitrile, methacrylonitrile, (meth) acrylic C 8 -C 8 alkyl esters such as methyl methacrylate, n-butyl acrylate, tert-butyl acrylate, derivatives (such as anhydrides and imides) of unsaturated carboxylic acids such as maleic anhydride and N-phenyl-maleimide or mixtures thereof.
  • unsaturated nitriles such as acrylonitrile, methacrylonitrile, (meth) acrylic C 8 -C 8 alkyl esters such as methyl methacrylate, n-butyl acrylate, tert-butyl acrylate, derivatives (such as anhydrides and imides) of unsaturated carboxylic acids such as maleic anhydride and N-phenyl-maleimide or mixtures thereof.
  • Particularly preferred monomers B.l.l are styrene, ⁇ -methylstyrene and / or methyl methacrylate, particularly preferred monomers B.l.2 are acrylonitrile, maleic anhydride and or methyl methacrylate.
  • Particularly preferred monomers are B.l.l styrene and B.1.2 acrylonitrile.
  • Rubbers B.2 suitable for the rubber-modified graft polymers B are, for example, diene rubbers, acrylate, polyurethane, silicone, chloroprene and ethylene / vinyl acetate rubbers. Composites made from various of the rubbers mentioned are also suitable as graft bases.
  • Preferred rubbers B.2 are diene rubbers (e.g. based on butadiene, isoprene
  • glass transition temperature component B.2 is below 10 ° C, preferably below -10 ° C.
  • Pure polybutadiene rubber is particularly preferred.
  • Further copolymerizable monomers can contain up to 50% by weight, preferably up to 30, in particular up to 20% by weight (based on the rubber base B.2) in the rubber base.
  • Suitable acrylate rubbers according to B.2 of the polymers B are preferably polymers made from acrylic acid alkyl esters, optionally with up to 40% by weight, based on B.2, of other polymerizable, ethylenically unsaturated monomers.
  • the preferred polymerizable acrylic acid esters include Cj to Cg-
  • Alkyl esters for example methyl, ethyl, butyl, n-octyl and 2-ethylhexyl esters; Halgoenalkyl esters, preferably halogen-C; * - Cg-alkyl esters, such as chloroethyl acrylate and mixtures of these monomers.
  • Preferred "other" polymerizable, ethylenically unsaturated monomers which, in addition to the acrylic acid esters, can optionally be used to prepare the graft base B.2 are, for. B. acrylonitrile, styrene, ⁇ -methylstyrene, acrylamides, vinyl C-- C 6 alkyl ether methyl methacrylate, butadiene.
  • Preferred acrylate rubbers as graft base B.2 are emulsion polymers which have a gel content of at least 60% by weight.
  • graft bases according to B.2 are silicone rubbers with graft-active sites, as described in DE-A 3 704 657, DE-A 3 704 655, DE-A 3 631 540 and DE-A 3 631 539.
  • the graft polymers according to the present invention particularly preferably contain no graft bases (rubbers) based on ethylene / propylene rubbers (EPR) or ethylene / propylene and non-conjugated diene (EPDM), as described, for example, in JP 11 24 10 16 A2.
  • EPR ethylene / propylene rubbers
  • EPDM ethylene / propylene and non-conjugated diene
  • the gel content of the graft base B.2 is determined at 25 ° C. in a suitable solvent (M. Hoffmann, H. Krömer, R. Kuhn, Polymeranalytik I and U, Georg Thieme-Verlag, Stuttgart 1977).
  • the average particle size dso is the diameter above and below which 50% by weight of the particles lie. It can be determined by means of ultracentrifuge measurement (W. Scholtan, H. Lange, Kolloid, Z. and Z. Polymer 250 (1972), 782-1796).
  • component B can additionally contain small amounts, usually less than 5% by weight, preferably less than 2% by weight, based on B.2, contain cross-linking ethylenically unsaturated monomers.
  • crosslinking monomers are esters of unsaturated monocarboxylic acids with 3 to 8 carbon atoms and unsaturated monohydric alcohols with
  • polystyrene resin 3 to 12 carbon atoms, or saturated polyols with 2 to 4 OH groups and 2 to 20 carbon atoms, polyunsaturated heterocyclic compounds, polyfunctional vinyl compounds, such as alkylene diol di (meth) acrylates, polyester di (meth) - acrylates, divinylbenzene, trivinylbenzene, trivinylcyanurate, triallylcyanurate, allyl (meth) acrylate, diallyl maleate, diallyl fumarate, triallyphosphate and iallyl phthalate.
  • alkylene diol di (meth) acrylates polyester di (meth) - acrylates
  • divinylbenzene trivinylbenzene
  • trivinylcyanurate trivinylcyanurate
  • triallylcyanurate triallylcyanurate
  • allyl (meth) acrylate diallyl maleate, diallyl fumarate, triallyphosphate and iallyl
  • Preferred crosslinking monomers are allyl methacrylate, emylene glycol dimethacrylate, diallyl phthalate and heterocyclic compounds which have at least three ethylenically unsaturated groups.
  • the rubber-modified graft polymer B is obtained by graft polymerization from 50 to 99, preferably 65 to 98, particularly preferably 75 to 97 parts by weight of a mixture of 50 to 99 60 to 95 parts by weight of monomers according to B1 and 1 to 50, preferably 5 to 40 parts by weight of monomers according to B.1.2 in the presence of 1 to 50, preferably 2 to 35, particularly preferably 2 to 15, in particular 2 to 13 parts by weight of the rubber component B.2.
  • the average particle diameter d 5 Q of the grafted rubber particles generally has values from 0.05 to 10 ⁇ m, preferably 0.1 to 5 ⁇ m, particularly preferably 0.2 to 1 ⁇ m.
  • the average particle diameter d 5 o of the resulting grafted rubber particles by bulk or solution or bulk-suspension polymerization method are available, (determined by counting on electron microscopy
  • Recordings is generally in the range from 0.5 to 5 ⁇ m, preferably from 0.8 to 2.5 ⁇ m.
  • the graft copolymers can be present in component B alone or in any mixture with one another.
  • Component B is contained in the polymer composition according to the invention preferably in an amount of 0.5 to 50 parts by weight, particularly preferably 1 to 40 parts by weight and very particularly preferably 1 to 35 parts by weight.
  • Mineral particles suitable according to the invention are inorganic materials with a flaky or platelet-like and fibrous character such as talc, mica / clay layer minerals, montmorrilonite, the latter also in an organophilic form modified by ion exchange, and furthermore kaolin, vermiculite and wollastonite
  • Talc and wollastonite are particularly preferred.
  • Talc is understood to mean a naturally occurring or synthetically produced talc.
  • Pure talc has the chemical composition 3MgO4SiO 2 'H 2 O and thus an MgO content of 31.9% by weight, an SiO 2 content of 63.4% by weight and a chemically bound water content of 4.8% by weight. It is a silicate with poor structure.
  • Talc types of high purity are particularly preferred. These contain, for example, an MgO content of 28 to 35% by weight, preferably 30 to 33% by weight, particularly preferably 30.5 to 32% by weight and an SiO 2 content of 55 to 65% by weight , preferably 58 to 64% by weight, particularly preferably 60 to 62.5% by weight.
  • Preferred types of talc are further characterized by an Al 2 O 3 content of ⁇ 5% by weight, particularly preferably ⁇ 1% by weight, in particular ⁇ 0.7% by weight.
  • Preferred mineral particles are also those with anisotropic particle geometry. These are understood to mean those particles whose so-called aspect ratio - the ratio of the largest and the smallest particle size - is greater than 1, preferably greater than 2 and particularly preferably greater than about 5. Such particles are at least in the broadest sense platelet-shaped or fibrous.
  • Such materials include, for example, certain talcs and certain (alionimino) silicates with a layer or fiber geometry such as bentonite, wollastonite, mica (mica), kaolin, hydrotalcite, hectorite or montmorillonite.
  • talc in the form of finely ground types with an average particle size d o 5 microns of ⁇ 10, preferably ⁇ 5 micrometers, more preferably ⁇ 2.5 microns, very preferably ⁇ 1.5 microns.
  • talc having an average particle size is d 5 o of 350 nm to 1.5 microns.
  • Preferred wollastonites have an average aspect ratio of> 6, in particular> 7 and an average fiber diameter of 1 to 15 ⁇ m, preferably 2 to 10 ⁇ m, in particular 4 to 8 ⁇ m.
  • the average aspect ratio in the sense of the invention is the ratio of the average length of the fiber to the average diameter.
  • Particle size and particle diameter in the sense of this invention means the average particle diameter d 50 , determined by ultracentrifuge measurements
  • the mineral particles can be surface-modified with organic molecules, for example silanized, in order to achieve better compatibility with the polymers. In this way, hydrophobic or hydrophilic surfaces can be created.
  • elongated or plate-like materials with the specified small particles are particularly suitable, compared to fibril-shaped or spherical fillers. Those are highly preferred
  • D / T average diameter / thickness
  • the mineral particles can be present as powders, pastes, brine dispersions or suspensions. By precipitation, powders can be obtained from dispersions, brine or suspensions.
  • thermoplastic molding compositions can be incorporated into the thermoplastic molding compositions by customary processes, for example by directly kneading or extruding molding compositions and the finely divided inorganic powders.
  • Preferred procedure Ren represent the production of a masterbatch, for example in flame retardant additives and at least one component of the molding compositions according to the invention in monomers or solvents, or the co-precipitation of a thermoplastic component and the finely divided inorganic powders, for example by co-precipitation of an aqueous emulsion and the finely divided inorganic powders, optionally in Form of dispersions, suspensions, pastes or sols of the finest inorganic materials.
  • Examples of substances which can preferably be used according to the invention as mineral particles are Tremin® 939-300EST from Quarzwerke GmbH, Frechen, Germany
  • Aluminum silicate with a particle size d 50 1.3 ⁇ m), Naintsch A3 (see examples, component CI), Nyglos ® 4-10013 (see examples C2).
  • the mineral particles of component C can be present in the composition according to the invention in an amount of preferably up to 30 parts by weight, particularly preferably up to 20 parts by weight and, if present, preferably from 1.5 to 13 parts by weight. Share, be included.
  • the compositions according to the invention can contain particulate carbon compounds such as carbon black, which is suitable for producing conductivity and is also referred to by the person skilled in the art as conductivity black, graphite powder and / or carbon nanofibrils.
  • carbon black which is suitable for producing conductivity and is also referred to by the person skilled in the art as conductivity black, graphite powder and / or carbon nanofibrils.
  • graphite powders are comminuted graphite.
  • the person skilled in the art understands graphite as a modification of the carbon as described, for example, in AF Hollemann, E. Wieberg, N. Wieberg, “Textbook of Inorganic Chemistry”, 91st-100th ed., Pp. 701-702.
  • Graphite consists of planar carbon layers arranged one above the other.
  • graphite can be comminuted, for example, by grinding.
  • the particle size is in the range from 0.1 ⁇ m to 1 mm, preferably in the range from 1 to 300 ⁇ m, most preferably in the range from 2 to 20 ⁇ m.
  • the dibutyl phthalate adsorption of the conductivity carbon blacks is between 40 and 1000 ml per 100 g of carbon black, preferably between 90 and 600 ml per 100 g of carbon black.
  • a large number of oxygen-containing groups such as, for example, carboxyl, lactol, phenol groups, quinoid carbonyl groups and / or pyrone structures, can be located on the surface of the carbon black.
  • Conductivity carbon blacks can be produced from acetylene, from synthesis gas or from the furnace process from oil, carrier gases and air. Manufacturing processes are described, for example, in R.G. Gilg, "Carbon black for conductive plastics" in: Electrically conductive plastics, ed .: H.J. Mair, S. Roth, 2nd ed., Carl Hanser
  • the carbon blacks and / or graphites according to the invention can be added before, during or after the polymerization of the monomers to give the thermoplastics of component A).
  • the additions of the carbon black and or graphite according to the invention are carried out according to the
  • the carbon blacks and / or graphites can also be metered in as highly concentrated masterbatches in thermoplastics, which are preferably chosen from the group of thermoplastics used as component A).
  • concentration of the carbon blacks and / or graphites in the masterbatches is in the range from 5 to 70, preferably 8 to 50, particularly preferably in Range from 12 to 30 wt .-% (based on the masterbatch).
  • the carbon blacks and / or graphites can also be mixed with binders such as waxes, fatty acid esters or polyolefins for better meterability.
  • the carbon blacks and / or graphites can also be pelletized or granulated with or without additional additives, for example by pressing or printing processes, which likewise serves to improve meterability.
  • Carbon nanofibrils according to the invention typically have the form of tubes which are formed from graphite layers.
  • the graphite layers are arranged in a concentric manner around the cylinder axis.
  • Carbon nanofibrils have a length-to-diameter ratio of at least 5, preferably at least 100, particularly preferably at least 1000.
  • the diameter of the nanofibrils is typically in the range from 0.003 to 0.5 ⁇ m, preferably in the range from 0.005 to 0.08 ⁇ m, particularly preferably in the range from 0.006 to 0.05 ⁇ m.
  • the length of the carbon nanofibrils is typically 0.5 to 1000 ⁇ m, preferably 0.8 to 100 ⁇ m, particularly preferably 1 to 10 ⁇ m.
  • the carbon nanofibrils have a hollow, cylindrical core around which the graphite layers are formally wrapped.
  • This cavity typically has a diameter of 0.001 to 0.1 ⁇ m, preferably a diameter of 0.008 to 0.015 ⁇ m.
  • the wall of the fibril around the cavity consists, for example, of 8 graphite layers.
  • the carbon nanofibrils can be present as aggregates of up to 1000 ⁇ m in diameter, preferably up to 500 ⁇ m in diameter, of several nanofibrils.
  • the aggregates can take the form of bird nests, combed yarn or open net structures.
  • the carbon nanofibrils can be added before, during or after the polymerization of the monomers to give thermoplastics of component A). If the nanofibrils according to the invention are added after the polymerization, they are preferably added to the thermoplastic melt in an extruder or in a kneader. By means of the compounding process in the kneader or extruder, the aggregates already described can in particular be largely or even completely crushed and the carbon nanofibrils can be dispersed in the thermoplastic matrix.
  • the carbon nanofibrils can be metered in as highly concentrated masterbatches in thermoplastics, which are preferably selected from the group of thermoplastics used as component A).
  • concentration of the carbon nanofibrils in the masterbatches is in the range from 5 to 50, preferably 8 to 30, particularly preferably in the range from 12 to 22% by weight.
  • the production of masterbatches is described, for example, in US Pat. No. 5,643,502.
  • the use of masterbatches can particularly improve the size reduction of the aggregates.
  • the carbon nanofibrils can have shorter length distributions than originally used due to the processing into the molding composition or molding in the molding composition or in the molding.
  • mixtures of the individual components can also be used.
  • Conductivity invention for example, under the name Ketjenblack ® by the company AKZO Nobel, under the name Vulcan ® by the company. Cabot or under the name Printex ® by the company. Degussa be obtained.
  • Graphites according to the invention can be used as powders, for example from Vogel &
  • Carbon nanofibrils are offered, for example, by Hyperion Catalysis or Applied Sciences Inc.
  • the carbon nanofibrils are synthesized, for example, in a reactor which contains a carbon Contains gas and a metal catalyst, as described for example in US-A 5 643 502.
  • polyester-ether block copolymers contain the reaction product of ethylene glycol, terephthalic acid or dimethyl terephthalate and polyethylene glycol.
  • Polyester ether copolymers are described, for example, in Encyclopedia of Polymer Science and Engineering, Vol. 12, John Wiley & Sons, Inc., N.Y., 1988, pages 49-52.
  • Preferred polyether ester amides are block copolymers in which the polyether segments are polyethylene glycol units with a molecular weight M n of 200 to 6,000 daltons and the polyamide segments have a molecular weight M n generally of 200 to 6,000 daltons.
  • the block copolymer preferably contains 4 to 14 polyamide segments.
  • Suitable polyether ester amides are described, for example, in EP-A 613 919.
  • the polyamides mentioned in the description of component A) are suitable as polyamide segments.
  • the polymers according to component E) are preferably used in the form of antistatic preparations, which for example may additionally contain inorganic or organic salts.
  • antistatic preparations or antistatic agents include in WO 02/055411 and US-A 5,965,206 and the references cited therein.
  • WO 02/055411 and US-A 5,965,206 are explicitly included as a disclosure in the present application.
  • Antistatic compositions are, for example under the names hgastat ® P 18 and P 22 Irgastat ® commercially available from Ciba Specialty Chemicals Company.
  • Antistatic mixtures or preparations preferably contain inorganic salts selected from the group consisting of LiQO, LiCF 3 S ⁇ 3 , NaQO 4 , LiBF 4 , NaBF 4 , KBF 4 , NaCF 3 SO 3 , KClO 4 , KPF 6 , KCF 3 SO 3 , KC4F 9 SO 3 , Ca (ClO 4 ) 2 , Ca (PF 6 ) 2 , Mg (ClO 4 ) 2 , Mg (CF 3 SO 3 ) 2 , Zn (ClO 4 ) 2 , Zn (PF 6 ) 2 or Ca (CF 3 SO 3 ) 2 , which are generally used in polyether ester amide, polyether ester block copolymers or
  • Polyamide-polyether block copolymers or mixtures thereof are complexed or solvated.
  • Suitable organic salts are preferably selected from organic zinc, barium, cadmium, aluminum, calcium, magnesium or a rare one
  • Earth metal salts with aliphatic saturated C -C 2 carboxylates, aliphatic unsaturated C 3 -C 22 carboxylates, aliphatic C 2 -C 2 carboxylates which are substituted by at least one hydroxyl group or whose chain is substituted by at least one oxygen atom is interrupted, further cyclic or bicyclic C5-C22 carboxylates, respectively unsubstirusammlungs or by at least one OH
  • an organic fibrous or fiber-forming polymer such as polyamide, copolyamide, polyester, polyvinyl acetate, polyvinyl alcohol, polyacrylic acid ester, modified cellulose, and furthermore those which are described in US
  • Polyester, polyamide 4.6, polyamide 6.6, polyamide 6 or copolyamide 6 / 6.6 are preferably used as the fibrous material.
  • Thermoplastic polymers with polar groups are preferably used as compatibilizers.
  • F.2 at least one monomer selected from the group C 2 to C 12 alkyl methacrylates, C 2 to C 12 alkyl acrylates, methacrylonitriles and acrylonitriles and
  • F.3 contain ⁇ , ⁇ -unsaturated components containing dicarboxylic anhydrides.
  • Styrene is particularly preferred as vinyl aromatic monomer F.l.
  • Maleic anhydride is particularly preferred for ⁇ , ⁇ -unsaturated "components containing dicarboxylic anhydrides F.3.
  • Terpolymers of the monomers mentioned are preferably used as component F.l, F.2 and F.3. Accordingly, terpolymers of styrene preferably
  • Acrylonitrile and maleic anhydride are used. These terpolymers contribute in particular to improving the mechanical properties, such as tensile strength and elongation at break.
  • the amount of maleic anhydride in the terpolymer can vary within wide limits. The amount is preferably 0.2 to 5 mol%. Amounts between 0.5 and 1.5 mol% are particularly preferred. In this area particularly good mechanical properties with regard to tensile strength and elongation at break are achieved.
  • the terpolymer can be produced in a manner known per se.
  • a suitable method is to dissolve monomer components of the terpolymer, e.g. of
  • Styrene, maleic anhydride or acrylonitrile in a suitable solvent e.g. Methyl ethyl ketone (MEK).
  • a suitable solvent e.g. Methyl ethyl ketone (MEK).
  • One or optionally several chemical initiators are added to this solution. Suitable initiators are e.g. Peroxides.
  • the mixture is then polymerized for several hours at elevated temperatures. The solvent and the unreacted monomers are then removed in a manner known per se.
  • the ratio between component F.l (vinyl aromatic monomer) and component F.2, e.g. the acrylonitrile monomer in the terpolymer is preferably between 80:20 and 50:50.
  • an amount of vinyl aromatic monomer F.l is preferably selected which corresponds to the amount of vinyl monomer B.l in graft copolymer B.
  • EP-A 785 234 and EP-A-202 214 According to the invention, particular preference is given to the polymers mentioned in EP-A 785 234.
  • Compatibility mediators can be contained in component F alone or in any mixture with one another.
  • Another substance which is particularly preferred as a compatibilizer is a terpolymer of styrene and acrylonitrile in a weight ratio of 2.1: 1 containing 1 mol% of maleic anhydride.
  • the amount of component F in the polymer compositions according to the invention is preferably between 0.5 and 30 parts by weight, in particular between 1 and 20 parts by weight and particularly preferably between 2 and 10 parts by weight. Amounts between 3 and 7 parts by weight are most preferred.
  • Component G comprises one or more thermoplastic vinyl (co) polymers.
  • Suitable vinyl (co) polymers for component G are polymers of at least one monomer from the group of the vinyl aromatics, vinyl cyanides (unsaturated nitriles), (meth) acrylic acid (C 1 -C 8 ) alkyl esters, unsaturated carboxylic acids and derivatives (such as anhydrides and imides ) unsaturated carboxylic acids.
  • (Co) polymers of are particularly suitable
  • Gl 50 to 99 preferably 60 to 80 parts by weight of vinyl aromatics and / or core-substituted vinyl aromatics (such as styrene, ⁇ -methylstyrene, p-methylstyrene, p-chlorostyrene) and / or methacrylic acid (-CC 8 ) alkyl esters (such as methyl methacrylate, ethyl methacrylate), and
  • G.2 1 to 50, preferably 20 to 40 parts by weight of vinyl cyanides (unsaturated
  • Nitriles such as acrylonitrile and methacrylonitrile and / or (meth) acrylic acid
  • (C - C 8 ) alkyl esters such as methyl methacrylate, n-butyl acrylate, tert-butyl acrylate
  • unsaturated carboxylic acids eg N-phenylmaleimide
  • the (co) polymers G are resin-like, thermoplastic and rubber-free.
  • the copolymer of Gl styrene and G.2 acrylonitrile is particularly preferred.
  • the (co) polymers G are known and can be prepared by radical polymerization, in particular by emulsion, suspension, solution or bulk polymerization.
  • the (co) polymers preferably have average molecular weights Mw (weight average, determined by light scattering or sedimentation) between 15,000 and 200,000.
  • the vinyl (co) polymers can be contained in component G alone or in any mixture with one another.
  • Component G is preferably in one in the polymer composition
  • Contain amount of 0 to 30 parts by weight in particular from 0 to 25 parts by weight and particularly preferably from 0 to 20 parts by weight, in particular 0.5 to 10 parts by weight.
  • Phenol-formaldehyde resins according to the invention are obtained by condensation reaction from phenols with aldehydes, preferably formaldehyde, by derivatization of the resulting condensates or by addition of phenols to unsaturated compounds, e.g. Acetylene, terpenes etc. produced
  • the condensation can be acidic or basic and the molar ratio of aldehyde to phenol can be from 1: 0.4 to 1: 2.0. This produces oligomers or polymers with a molar mass of 150-5000 g / mol.
  • the resins are known or can be prepared by processes known from the literature.
  • compositions preferably contain phenol-formaldehyde resins which are generally added in an amount of up to 15 parts by weight, preferably 1 to 12 and in particular 2 to 8 parts by weight.
  • Component J phenol-formaldehyde resins which are generally added in an amount of up to 15 parts by weight, preferably 1 to 12 and in particular 2 to 8 parts by weight.
  • the polymer compositions according to the invention can contain conventional additives, such as flame retardants, anti-dripping agents, fillers and reinforcing materials, different from components C and D, lubricants and. Mold release agents, nucleating agents,
  • Contain antistatic agents different from component E, stabilizers as well as dyes and pigments.
  • compositions according to the invention can generally contain from 0.01 to 20% by weight, based on the overall composition, of flame retardants.
  • flame retardants are organic halogen compounds such as decabromobisphenyl ether, tetrabromobisphenol, inorganic halogen compounds such as ammonium bromide, nitrogen compounds such as melamine, melamine formaldehyde resins, inorganic hydroxide compounds such as Mg-Al-hydroxide, inorganic compounds such as Aliminium oxides, titanium dioxide, antimony oxides, barium meta-borate, zirconium meta borate, hydroxyl Zirconium hydroxide, molybdenum oxide, ammonium molybdate, tin riborate, ammonium borate and tin oxide as well as siloxane compounds.
  • flame retardant compounds can also phosphorus compounds, as in the
  • EP-A 363 608, EP-A 345 522 and / or EP-A 640 655 are used.
  • Glass fibers optionally cut or ground, glass beads and glass balls are suitable as further filling and reinforcing materials.
  • compositions according to the invention are prepared by mixing the respective constituents in a known manner and at temperatures of 200 ° C to 300 ° C in conventional units such as kneaders, extruders and twin-screw extruders, melt-compounded and melt-extruded, the mold release agent being used in the form of a coagulated mixture.
  • the individual constituents can be mixed in a known manner both successively and simultaneously, both at about 20 ° C. (room temperature) and at a higher temperature.
  • the polymer compositions according to the invention can be used for the production of moldings of any kind.
  • molded parts can by
  • molded parts are: Housing parts of all kinds, for example for household appliances such as electric shavers, flat screens, monitors, printers, copiers or cover plates for the construction sector and parts for motor vehicles and rail vehicles. They can also be used in the field of electrical engineering because they have very good electrical properties.
  • polymer compositions according to the invention can be used, for example, to produce the following moldings:
  • Another form of processing is the production of molded parts by deep drawing from previously produced sheets or foils.
  • Another object of the present invention is therefore also the use of the compositions according to the invention for the production of moldings of any kind, preferably those mentioned above, and the moldings from the compositions according to the invention.
  • the online-painted molded parts preferably online-painted automotive exterior parts, for example wheel arches, fenders, outer mirror housings, etc., are also the subject of the present invention.
  • compositions are prepared, processed into test specimens and tested in accordance with the information in Table 1.
  • Polyamide 6.6 (Ultramid ® A 3, BASF, Ludwigshafen, Germany).
  • Graft polymer of 40 parts by weight of a copolymer of styrene and acrylonitrile in a ratio of 73:27 to 60 parts by weight of particulate crosslinked polybutadiene rubber (average particle diameter d 50 0.28 ⁇ m), produced by emulsion polymerization.
  • Nyglos ® 4-10013 silica wollastonite with a particle size according to manufacturer's specifications of 4.8 ⁇ m
  • Ketjenblack ® EC 600 (Akzo Nobel, Düren sales office, 52349 Düren, Germany (electrically conductive carbon black)
  • Styrene / acrylonitrile copolymer with a Slyrol / AcryMtril weight ratio of 72:28 and an intrinsic viscosity of 0.55 dl / g (measurement in dimethylformamide at 20 ° C).
  • compositions are mixed on a 3-1 internal kneader.
  • the moldings are produced on an Arburg 270 E injection molding machine at 280 ° C.
  • Vicat B's dimensional stability under heat is determined in accordance with ISO 306 on rods measuring 80 x 10 x 4 mm.
  • the impact strength a ⁇ is determined in accordance with ISO 180/1 U.
  • the MVR (Melt Volume Rate) is determined according to ISO 1133 at 280 ° C using a stamp load of 5 kg.
  • the surface resistance is determined according to DL IEC 60167.
  • the elongation at break is determined in a tensile test according to ISO 527.
  • component E shows positive properties with regard to the toughness of the molding composition and the flow behavior.
  • the combination of E and D has a positive effect.
  • Comparative example 1 Comparative example 1
  • a very good surface resistance is achieved, but the MVR value drops so much that it can no longer be determined under the given conditions.
  • less carbon black is used (comparative example 2)
  • the surface resistance is very high and, in contrast to examples 1 and 2 according to the invention, the MVR value is significantly lower.
  • Example 3 The advantageous properties as in Example 1 are also evident with wollastonite as filler (Example 3)
  • the value of the surface resistance in Examples 1, 2 and 3 is for electrostatic painting of a molded part without prior treatment with a

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Graft Or Block Polymers (AREA)
EP03772333A 2002-11-25 2003-11-13 Schlagzähmodifizierte polymer-zusammensetzungen Withdrawn EP1567581A1 (de)

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DE2002154877 DE10254877A1 (de) 2002-11-25 2002-11-25 Schlagzähmodifizierte Polymer-Zusammensetzungen
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DE10257077 2002-12-06
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ATE517151T1 (de) 2011-08-15
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WO2004048452A1 (de) 2004-06-10

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