Yellow pigment composition

Abstract

A pigment composition is provided comprising a bismuth vanadate pigment dispersed in a copolymer of ethylene with at least one comonomer selected from the group consisting of (meth)acrylic acid, C1-12-alkyl (meth)acrylates, and maleic anhydride.

Description

Technology Field

[0001] The present invention relates to a yellow pigment composition, its use as a coloring agent in a thermoplastic polymer composition, a corresponding thermoplastic molding composition, its fiber, and its use for forming a foil or molded article, and each fiber, foil or molded article. Background Technology

[0002] To provide a thermoplastic molding composition, yellow inorganic and / or organic pigments may be used. An example of an organic yellow pigment is the monoazo-ca-pigment BAYPLAST. ® It is Yellow G Gran. Bismuth vanadate, an inorganic yellow pigment, is commonly used in the form of a bismuth vanadate masterbatch stabilized against thermal decomposition by the addition of boric acid. Common commercially available bismuth vanadate pigments are encapsulated in silicate or alumina. This encapsulation does not provide sufficient stability against thermal decomposition, particularly in polyamide molding compositions used in injection molding.

[0003] Since boric acid should preferably no longer be used in thermoplastic molding compositions, there is a need for an alternative bismuth vanadate masterbatch that is stable against the thermal decomposition of pigments. Simply excluding boric acid was not successful because thermal decomposition was observed after a short period of time.

[0004] The fundamental objective of the present invention is to provide a bismuth vanadate pigment composition that can be used as a masterbatch for coloring a thermoplastic molding composition, in particular, a polyamide-containing thermoplastic molding composition stabilized against thermal decomposition without containing boric acid or boron compounds.

[0005] The above objective is achieved, according to the present invention, by (meth)acrylic acid, C 1-12This is achieved by pigment composition C comprising a bismuth vanadate pigment dispersed in a copolymer of ethylene with at least one comonomer selected from the group consisting of alkyl (meth)acrylates and maleic anhydrides. Specific details for implementing the invention

[0006] According to the present invention, the bismuth vanadate pigment comprises (meth)acrylic acid, C 1-12 It has been found that the pigment composition can be stably dispersed in a copolymer of ethylene with at least one comonomer selected from the group consisting of alkyl (meth)acrylates and maleic anhydrides, and that the resulting pigment composition is stable against thermal decomposition during storage, inclusion in a thermoplastic polymer, and processing of the thermoplastic polymer, for example, when providing a molded article by injection molding.

[0007] Simply excluding boric acid from the announced bismuth vanadate masterbatch was not successful because the bismuth vanadate pigment underwent rapid thermal decomposition.

[0008] Using bismuth vanadate pigment in polyethylene masterbatch was also not sufficient to prevent thermal decomposition.

[0009] Only by including or dispersing in an ethylene copolymer having an organic acid group selected from acrylic acid, acrylate, or maleic anhydride groups produces a bismuth vanadate masterbatch having desirable thermal stability. According to the present invention, it has been found that the color stability of the bismuth vanadate pigment can be significantly improved, in particular, by adding an ethylene copolymer containing maleic anhydride. Preferably, the masterbatch is prepared from the bismuth vanadate pigment and copolymer, which is then used as a coloring agent when formulating a thermoplastic molding composition or injection molding. It is also possible to prepare a pigment composition or a thermoplastic molding composition by directly including the bismuth vanadate pigment and copolymer as separate compounds in the formulation.

[0010] Bismuth vanadate is an inorganic compound with the chemical formula BiVO4. It is a bright yellow solid representative of complex inorganic coloring pigments (CICP). More specifically, bismuth vanadate is a mixed metal oxide. Bismuth vanadate is Color Index ® It is also known as CI Pigment Yellow 184 under International. When used as a pigment, it has high saturation and excellent opacity. In nature, bismuth vanadate can be found as the minerals fucherite, clinobisvanite, and dreyerite, depending on the specific polymorphs formed.

[0011] Bismuth vanadate pigments are generally based on pure bismuth vanadate having a monoclinic (clinobisvanite) or tetragonal (dreyerite) structure. These can be formed from a series of pH-controlled precipitation reactions (it is important to note that these reactions can be carried out with or without the presence of molybdenum depending on the desired final step). It is also possible to obtain a pure product by starting with parent oxides (Bi2O3 and V2O5) and performing high-temperature calcination.

[0012] Bismuth vanadate pigment can be coated with aluminum and / or silica.

[0013] A general pigment composition according to the present invention comprises bismuth vanadate in an amount of preferably 5 to 60 weight%, more preferably 10 to 50 weight%, and most preferably 20 to 40 weight% based on the total amount of the pigment composition.

[0014] The amount of copolymer may likewise preferably be 5 to 60 weight%, more preferably 10 to 50 weight%, and most preferably 20 to 40 weight%.

[0015] The copolymer contains ethylene in an amount of preferably 50 to 97 weight%, more preferably 60 to 95 weight%, and most preferably 70 to 90 weight%, based on the total amount of the copolymer. The comonomer is preferably acrylic acid, C 1-6 - It is an alkyl acrylate, maleic anhydride, or a mixture thereof.

[0016] It is particularly preferable to use a copolymer of ethylene with acrylates, acrylic acid, and maleic anhydride. Specifically, it is preferable to use a copolymer of ethylene, n-butyl acrylate, acrylic acid, and maleic anhydride. A suitable copolymer is from Lupolen, BASF SE. ® It is available as KR 1270. This copolymer is commonly used in polyamide compositions as an impact-modifying polymer, see, for example, US 8,629,206 B2 and US 2016 / 0130381 A1.

[0017] A copolymer containing a carboxylic acid group can be used alone to prepare the pigment composition of the present invention. In this case, the pigment composition consists of a bismuth vanadate pigment and an acid-containing copolymer as a matrix polymer.

[0018] It is also possible to add an additional polymer, preferably a polyolefin, to the pigment composition. The polyolefin is preferably polyethylene, polypropylene, or at least one C as a comonomer. 3-12 - It may be a copolymer of ethylene with an olefin. This copolymer must be different from the copolymer containing a carboxylic acid group. Preferably, this additional polymer is (meth)acrylic acid, C 1-12 - It does not contain alkyl (meth)acrylates and maleic anhydride comonomers.

[0019] Due to the polyolefin properties, this additional (co)polymer can be homogeneously mixed with the copolymer. Preferred as these additional polyolefins are polyethylene, polypropylene, or ethylene / propylene copolymer. Most preferred is polyethylene.

[0020] The mass ratio of this polyolefin to the copolymer is preferably in the range of 3:1 to 1:3, more preferably 2:1 to 1:2, and most preferably 1:1 to 5:3.

[0021] A desirable pigment composition C is

[0022] As component C1, bismuth vanadate 5 to 60 weight%, preferably 10 to 50 weight%, more preferably 20 to 40 weight%,

[0023] As component C2, (meth)acrylic acid, C 1-12 5 to 60 weight%, preferably 10 to 50 weight%, more preferably 20 to 40 weight% of a copolymer of ethylene with at least one comonomer selected from the group consisting of alkyl (meth)acrylates and maleic anhydrides,

[0024] As component C3, at least one C as polyethylene, polypropylene, or a comonomer. 3-12 - 10 to 70 weight%, preferably 20 to 60 weight%, more preferably 30 to 50 weight%, of a copolymer of ethylene with an olefin that is different from component C2, and

[0025] As component C4, additional component 0 to 10 weight%, preferably 0 to 5 weight%, more preferably 0 to 2 weight%

[0026] It includes, and the total amount of components C1 to C4 is 100 weight%.

[0027] Additional component C4 is an additional coloring agent, for example, an organic pigment, specifically BAYPLAST ®It may be a yellow organic pigment such as Yellow G. Additional ingredients may be commonly used auxiliary agents.

[0028] Pigment composition C can be used as a coloring agent in a thermoplastic polymer composition. This thermoplastic polymer composition may be based on a general thermoplastic polymer that can be injection molded. Preferably, the thermoplastic polymer contains at least one polyamide. More preferably, in the thermoplastic polymer composition, the main part of the polymer is a polyamide, in particular an aliphatic polyamide.

[0029] A preferred thermoplastic molding composition comprises a thermoplastic polymer and a pigment composition present in an amount that induces a bismuth vanadate content of 0.1 to 2.0 weight%, preferably 0.2 to 1.0 weight%, and more preferably 0.3 to 0.5 weight% of the thermoplastic molding composition.

[0030] The polymer containing the pigment composition may be selected from any desired suitable polymer. For example, it includes polyamide, polyester, polycarbonate, polyether, polyurethane, polysulfone, polyolefin, or a polymer blend prepared from two or more of these.

[0031] The present invention also relates to a thermoplastic molding composition,

[0032] As component A, 30 to 95 weight percent of at least one, for example aliphatic, polyamide or copolyamide,

[0033] As component B, 0 to 50 weight% of glass fiber,

[0034] As component C, 0.2 to 7 weight percent of a pigment composition as defined above,

[0035] As component D, 0 to 2 weight percent of at least one organic pigment, and

[0036] As component E, 0 to 50 weight% additional additive

[0037] The present invention relates to a thermoplastic molding composition comprising, wherein the total amount of components A to E is 100 weight%.

[0038] This thermoplastic molding composition preferably has a bismuth vanadate content in the range of 0.1 to 2.0 weight%, more preferably 0.2 to 1.0 weight%, and most preferably 0.3 to 0.5 weight%.

[0039] It is particularly preferable that component A comprises a polyamide or copolyamide present in an amount of 30 to 95 weight%, preferably 40 to 89.5 weight%, and more preferably 26 to 74 weight%.

[0040] The polyamides preferably used in the present invention are prepared through the reaction of starting monomers selected from, for example, dicarboxylic acids, diamines, salts of dicarboxylic acids and diamines, aminocarboxylic acids, aminonitriles, lactams, and mixtures. Any desired starting monomer of an aliphatic polyamide may be included herein. The polyamides may be amorphous, crystalline, or semicrystalline. Additionally, the polyamides may have any desired suitable viscosity and, respectively, a molecular weight. Particularly suitable polyamides have any type of aliphatic, semicrystalline, semi-aromatic, or amorphous structure.

[0041] The intrinsic viscosity of these polyamides is generally 90 to 350 ml / g, preferably 110 to 240 ml / g, when measured in a 0.5 wt% solution in 96 wt% sulfuric acid at 25°C according to ISO 307.

[0042] A semicrystalline or amorphous resin having a molecular weight (weight average) of at least 5000 is preferred, as described, for example, in the following U.S. Patent Nos. 2,071,250, 2,071,251, 2,130,523, 2,130,948, 2,241,322, 2,312,966, 2,512,606 and 3,393,210. Examples of these are polyamides derived from lactams having 7 to 11 cyclic groups, for example, polycaprolactam and polycapryllactam, and also polyamides obtained through the reaction of a dicarboxylic acid with a diamine.

[0043] Dicarboxylic acids that can be used are alkanedicarboxylic acids having 6 to 12, particularly 6 to 10, carbon atoms, and aromatic dicarboxylic acids. Here, the following acids may be mentioned: adipic acid, azelaic acid, sebacic acid, and dodecandioic acid (= decandicarboxylic acid).

[0044] Particularly suitable diamines are alkanedimines having 2 to 12, particularly 6 to 8, carbon atoms, and also di(4-aminocyclohexyl)methane or 2,2-di(4-aminocyclohexyl)propane.

[0045] Desirable polyamides and copolyamides are aliphatic.

[0046] Preferred polyamides are polyhexamethyleneadipamide (PA 66) and polyhexamethylenesebamide (PA 610), polycaprolactam (PA 6), and also nylon-6 / 6,6 copolyamide, in particular having caprolactam units in a ratio of 5 to 95 weight percent. PA 6, PA 66, and nylon-6 / 6,6 copolyamide are particularly preferred.

[0047] For example, a polyamide (Nylon-4,6) that can be obtained through the condensation reaction of 1,4-diaminobutane with adipic acid at high temperatures may also be mentioned. Methods for manufacturing polyamides having this structure are described, for example, in EP-A 38 094, EP-A 38 582, and EP-A 39 524.

[0048] Another example is a polyamide that can be obtained by copolymerizing a mixture of two or more of the monomers mentioned above and a plurality of polyamides in any desired mixing ratio.

[0049] The following non-exclusive list includes the polyamides mentioned, and also other polyamides for the purposes of the present invention (monomers are specified in parentheses):

[0050] PA 26 (ethylenediamine, adipic acid)

[0051] PA 210 (ethylenediamine, sebacic acid)

[0052] PA 46 (tetramethylenediamine, adipic acid)

[0053] PA 66 (hexamethylenediamine, adipic acid)

[0054] PA 69 (hexamethylenediamine, azelaic acid)

[0055] PA 610 (hexamethylenediamine, sebacic acid)

[0056] PA 612 (hexamethylenediamine, decandicarboxylic acid)

[0057] PA 613 (hexamethylenediamine, undecanedicarboxylic acid)

[0058] PA 1212 (1,12-dodecanediamine, decandicarboxylic acid)

[0059] PA 1313 (1,13-diaminotridecane, undecanedicarboxylic acid)

[0060] PA 4 (pyrrolidone)

[0061] PA 6(ε-caprolactam)

[0062] PA 7 (ethanolactam)

[0063] PA 8 (Caprylactam)

[0064] PA 9 (9-aminononanoic acid)

[0065] PA11(11-aminoundecanic acid)

[0066] PA 12 (Laurolactam).

[0067] These polyamides and their manufacture are known. Details regarding their manufacture are available to those skilled in the art in the literature. <Ullmanns Enzyklopaedie der Technischen Chemie [Ullmann's Encyclopedia Of Industrial Chemistry], 4 th ed., vol. 19, pp. 39-54, Verlag Chemie, Weinheim, 1980>, and also the literature<Ullmann's Encyclopedia of Industrial Chemistry, vol. A21, pp. 179-206, VCH Verlag, Weinheim 1992> , and also literature <Stoeckhert, Kunststoff Lexikon [Plastics Encyclopedia], pp. 425-428, Hanser Verlag, Munich 1992 (keyword "Polyamide" [Polyamides] ff.)> It can be found in.

[0068] It is particularly desirable to use nylon-6 or nylon-6,6.

[0069] In addition, the present invention makes it possible to provide a polyamide with a functionalized compound that can be connected to a carboxyl or amino group and, for example, has at least one carboxyl, hydroxyl, or amino group. These are preferably monomers having a branching effect, wherein they have, for example, monomers capable of being bonded to a carboxyl or amino group through at least three carboxyl or amino groups, for example, epoxy, hydroxyl, isocyanato, amino, and / or carboxyl groups, and have a functional group selected from a polymer block capable of being bonded to a hydroxyl group, ether group, ester group, amide group, imine group, imide group, halogen group, cyano group, and nitro group, CC double bond or CC triple bond, or a carboxyl or amino group.

[0070] The use of functionalization compounds allows the characteristic profile of the resulting polyamide to be adjusted over a wide range as desired.

[0071] For example, a triacetonediamine compound may be used as a functionalizing monomer. This preferably comprises 4-amino-2,2,6,6-tetramethylpiperidine or 4-amino-1-alkyl-2,2,6,6-tetramethylpiperidine, wherein the alkyl groups within these have 1 to 18 carbon atoms or are substituted by benzyl groups. The amount of the triacetonediamine compound present is, in each case, preferably 0.03 to 0.8 mol%, particularly preferably 0.06 to 0.4 mol% based on 1 mol of the amide group of the polyamide. For details, refer to DE-A-44 13 177.

[0072] As component B, the thermoplastic molding composition may contain glass fibers. If present, the amount of glass fibers is preferably 5 to 50 weight%, more preferably 10 to 40 weight%, and most preferably 25 to 35 weight%. Any desired suitable glass fiber may be used in the form of shredded glass or roving. The diameter of the shredded glass fibers is preferably about 10 μm. The glass fibers may be surface-treated, for example, silanized. It is particularly advantageous to use glass fibers together.

[0073] Component C is as described above. The amount of component C is preferably 0.3 to 5.0 weight%, more preferably 0.5 to 2.0 weight%.

[0074] If component D is present, it is used in an amount preferably 0.1 to 2.0 weight%, more preferably 0.2 to 1.0 weight%, and most preferably 0.3 to 0.5 weight% based on the total amount of components A to E. At least one organic pigment is preferably at least one yellow organic pigment. If such a pigment is, for example, component C4 and is already a part of component C, component D is not present.

[0075] The thermoplastic molding composition of the present invention may comprise, as component E, an additional additive of 0 to 50 weight%, preferably 0 to 30 weight%, and more preferably 0 to 20 weight%. The additive may include other fillers, stabilizers, oxidation retardants, agents that protect against degradation by heat and degradation by ultraviolet rays, flame retardants, lubricants and release agents, colorants such as dyes and pigments, nucleating agents, plasticizers, etc. For a more detailed description of possible additives, refer to pages 31 to 37 of WO 2008 / 074687.

[0076] It is most preferable that component E be present in an amount of 0.1 to 20 weight% (where the amount of component A is correspondingly reduced), wherein component E includes a stabilizer and a lubricant. For example, zinc oxide may be used as a stabilizer, and calcium stearate may be used as a lubricant. Conventional antioxidants for polyamide molding compositions, for example, Irganox by BASF SE ® Antioxidants available on the market can be used.

[0077] Phosphorus-containing organic polymers can be used alone or in combination with other flame-retardant materials and synergists as component E (part of).

[0078] Other flame-retardant materials may be, for example, red phosphorus, cyclic phenoxyphosphazene having at least phenoxyphosphazene units, or (di)phosphinate salts.

[0079] It is also possible to use the reaction product of melamine with phosphoric acid or metal borates.

[0080] A preferred reaction product of melamine with phosphoric acid is a product obtained by reacting substantially equimolar amounts of melamine or melamine condensate with phosphoric acid, pyrophosphate, or polyphosphoric acid through a suitable process. It is particularly preferred to use melamine polyphosphate, which can be obtained by the condensation of melamine phosphate by heating under nitrogen. The general formula of melamine polyphosphate is (C3H6N6HPO3) n am.

[0081] The phosphoric acid component of melamine phosphate is, for example, ortho-phosphoric acid, phosphoric acid, hypophosphoric acid, metaphosphoric acid, pyrophosphoric acid, triphosphoric acid, or phosphoric acid. Melamine polyphosphate obtained through the condensation of an adduct of ortho-phosphoric acid or pyrophosphoric acid with melamine is particularly preferred. The degree of condensation of the melamine polyphosphate is preferably 5 or higher. Alternatively, melamine polyphosphate may also be an equimolar adduct salt of polyphosphoric acid with melamine. It is also possible to use cyclic polymetaphosphoric acid together with acyclic polyphosphoric acid. The adduct salt of melamine polyphosphate is generally a powder obtained through the reaction of an aqueous slurry of a melamine mixture with polyphosphoric acid, followed by filtration, isolation, washing, and drying. The particle size of melamine polyphosphate can be adjusted within a wide range, and in this regard, reference may also be made to paragraph

[0026] of EP-A-2 100 919.

[0082] Suitable phosphinate salts are the general formula [R 1 R 2 P(=O)-O] - m M m+ It has the general formula [OP(=O)R 1 -OR 3 -OP(=O)R 2 -O] 2- n M x m+ It has, where R 1 and R 2are mutually independent linear or branched C 1-6 -alkyl moiety or C 6-10 -Aryl Moiety, R 3 is linear or branched C 1-10 -alkylene moiety, C 6-10 -Arylène Moiety, C 7-10 -alkyl arylene moiety, or C 7-10 - It is an arylalkylene moiety, where M is Ca, Mg, Al, or Zn, m is the valence of M determined by 2n = mx, n is a value of 1 or 3, and x is a value of 1 or 2. If the value of m or n is 2 or greater, the moiety R 1 to R 3 It can be freely selected at each location.

[0083] Examples of suitable phosphinate salts are dimethylphosphinate, ethylmethylphosphinate, diethylphosphinate, methyl-n-propylphosphinate, methanedi(methylphosphinate), benzene-1,4-di(methylphosphinate), methylphenylphosphinate, and diphenylphosphinate. The metal component M is a calcium ion, magnesium ion, aluminum ion, or zinc ion.

[0084] Examples of suitable phosphinate salts are calcium dimethylphosphinate, magnesium dimethylphosphinate, aluminum dimethylphosphinate, zinc dimethylphosphinate, calcium ethylmethylphosphinate, magnesium ethylmethylphosphinate, aluminum ethylmethylphosphinate, zinc ethylmethylphosphinate, calcium diethylphosphinate, magnesium diethylphosphinate, aluminum diethylphosphinate, zinc diethylphosphinate, calcium methyl-n-propylphosphinate, magnesium methyl-n-propylphosphinate, aluminum methyl-n-propylphosphinate, zinc methyl-n-propylphosphinate, calcium methylphenylphosphinate, magnesium methylphenylphosphinate, aluminum methylphenylphosphinate, zinc methylphenylphosphinate, calcium diphenylphosphinate, magnesium diphenylphosphinate, aluminum diphenylphosphinate, and zinc diphenylphosphinate.

[0085] Examples of suitable diphosphinate salts are calcium methanedi(methylphosphinate), magnesium methanedi(methylphosphinate), aluminum methanedi(methylphosphinate), zinc methanedi(methylphosphinate), calcium benzene-1,4-di(methylphosphinate), magnesium benzene-1,4-di(methylphosphinate), aluminum benzene-1,4-di(methylphosphinate), and zinc benzene-1,4-di(methylphosphinate).

[0086] It is particularly preferable to use phosphinate salts, in particular aluminum ethylmethylphosphinate, aluminum diethylphosphinate, and zinc diethylphosphinate. It is particularly preferable to use aluminum diethylphosphinate.

[0087] (Di)phosphinate salts can be used in any desired suitable particle size, see paragraph

[0032] of EP-A-2 100 919.

[0088] In addition, other flame retardants may be used simultaneously as additives to component E, either together with or as an alternative to the above flame retardant, such as those based on triazines, metal hydrates, and silicones. A common flame retardant based on triazines is melamine cyanurate.

[0089] Other additional flame-retardant materials may be metal compounds, such as magnesium hydroxide, aluminum hydroxide, zinc sulfate, iron oxide, and boron oxide, see paragraphs

[0046] to

[0048] of EP-A-2 100 919.

[0090] Other flame-retardant materials with synergistic effects are mentioned as examples in paragraphs

[0064] and

[0065] of US 2010 / 0261818.

[0091] The thermoplastic molding composition may include at least one impact-modified polymer as component E.

[0092] The component E used comprises 0 to 20 weight%, preferably 0 to 10 weight%, and particularly 0 to 8 weight%, at least one impact-modifying polymer different from the copolymer of component C. If the impact-modifying polymer is present, the minimum amount is 0.1 weight%, preferably 1 weight%, and particularly 3 weight%. Since the maximum possible amount of component A is reduced accordingly, the total amount of components A to E becomes 100 weight%. The combined use of component E is not mandatory, but its use can improve the impact resistance of the resulting polyamide molding composition. The impact-modifying polymers included herein are those generally used for impact modification of the polyamide of component A. It is preferable to include elastomers, such as natural or synthetic rubber and other elastomers.

[0093] Synthetic rubbers that may be mentioned and used are ethylene-propylene-diene rubber (EPDM), styrene-butadiene rubber (SBR), butadiene rubber (BR), nitrile rubber (NBR), hydrin rubber (ECO), and acrylate rubber (ASA). It is also possible to use silicone rubber, polyoxyalkylene rubber, and other rubbers.

[0094] As thermoplastic elastomers, the following may be mentioned: thermoplastic polyurethane (TPU), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and styrene-ethylene-propylene-styrene block copolymer (SEPS).

[0095] Resins can also be used as blend polymers, examples of which include urethane resin, acrylic resin, fluororesin, silicone resin, imide resin, amide-imide resin, epoxy resin, urea resin, alkyd resin, or melamine resin.

[0096] Ethylene copolymers may also be used as blend polymers, examples of which are copolymers of ethylene with 1-octene, 1-butene, or propylene, as described in WO 2008 / 074687. The molar mass of the aforementioned types of ethylene-α-olefin copolymers is preferably in the range of 10,000 to 500,000 g / mol, preferably 15,000 to 400,000 g / mol (number average molar mass). It is also possible to use straight-chain polyolefins, such as polyethylene or polypropylene.

[0097] Additional additives are compounds or substances that do not form part of the other components A through D. Thus, for example, if a polyolefin is used in component C, such a polymer cannot form part of component E. However, if component C does not contain a polyolefin that does not have a carboxyl group, such a polymer can form part of component E. Therefore, the different components A through E and C1 through C4 are mutually exclusive.

[0098] For suitable polyurethanes, refer to EP-B-1 984 438, DE-A-10 2006 045 869 and EP-A-2 223 904.

[0099] Other suitable thermoplastic resins are listed in paragraph

[0028] of JP-A-2009-155436.

[0100] Other polymers suitable as component E are mentioned in paragraph

[0044] of EP-A-2 100 919.

[0101] Other fillers that can be used as component E are carbon fibers, aromatic polyamide fibers and other fillers, such as gypsum fibers, synthetic calcium silicate, kaolin, calcined kaolin, wollastonite, talc powder and chalk.

[0102] The molding composition of the present invention is prepared by mixing components A to E. An extruder, such as a uniaxial or twin-screw extruder, or other conventional plasticizing device, such as a Brabender mixer or a Banbury mixer, is advantageously used for this purpose.

[0103] Here, the mixing order of the individual ingredients can be freely selected.

[0104] The molding composition of the present invention is characterized by improved flame retardancy, along with improved tensile deformation at break and Charpy impact resistance. This is suitable for the manufacture of molded articles, fibers, or foils.

[0105] The present invention also provides a corresponding molded article, fiber, or foil made of the thermoplastic molding composition described above.

[0106] The following examples provide further explanation of the present invention.

[0107] Examples

[0108] First, a pigment masterbatch was prepared. The masterbatch was manufactured in a twin-screw extruder at a temperature of 220°C. Color values ​​were obtained using a colorimeter or a spectrophotometer.

[0109]

[0110] These masterbatches were used as coloring agents in glass fiber reinforced polyamide 6 molding compositions. The respective results are presented in Table 2.

[0111] All weights are weight%.

[0112]

Claims

Claim 1 (Met)acrylic acid, C 1-12 A pigment composition comprising a bismuth vanadate pigment dispersed in a copolymer of ethylene with at least one comonomer selected from the group consisting of -alkyl (meth)acrylates and maleic anhydrides, wherein as component C1, bismuth vanadate 5-60 wt%, 10-50 wt%, or 20-40 wt%, and as component C2, (meth)acrylic acid, C 1-12 5 to 60 wt%, 10 to 50 wt%, or 20 to 40 wt% of a copolymer of ethylene with at least one comonomer selected from the group consisting of -alkyl (meth)acrylates and maleic anhydrides, as component C3, polyethylene, polypropylene, or at least one C as a comonomer 3-12 - 10 to 70 wt%, 20 to 60 wt%, or 30 to 50 wt% of a copolymer different from component C2, which is a copolymer of ethylene with an olefin, and 0 to 10 wt%, 0 to 5 wt%, or 0 to 2 wt% of an additional component as component C4, wherein the total amount of components C1 to C4 is 100 wt%, and (meth)acrylic acid, C 1-12 A copolymer of ethylene with at least one comonomer selected from the group consisting of -alkyl (meth)acrylates and maleic anhydrides is ethylene, C 2-6 - A pigment composition that is a copolymer of alkyl acrylate, acrylic acid, and maleic anhydride. Claim 2 delete Claim 3 A pigment composition according to claim 1 that does not contain boric acid or a boron compound. Claim 4 A pigment composition according to claim 1, wherein the pigment composition is used as a coloring agent in a thermoplastic polymer composition, and the thermoplastic polymer composition contains at least one polyamide. Claim 5 A thermoplastic molding composition comprising a thermoplastic polymer, and a pigment composition according to claim 1 present in an amount that induces a bismuth vanadate content of 0.1 to 2.0 wt%, 0.2 to 1.0 wt%, or 0.3 to 0.5 wt% in the thermoplastic molding composition. Claim 6 A thermoplastic molding composition comprising, as component A, 30 to 95 weight% of at least one polyamide or copolyamide; as component B, 0 to 50 weight% of glass fiber; as component C, 0.2 to 7 weight% of a pigment composition according to claim 1; as component D, 0 to 2 weight% of at least one organic pigment; and as component E, 0 to 50 weight% of an additional additive, wherein the total amount of components A to E is 100 weight%. Claim 7 A thermoplastic molding composition according to claim 6, wherein the bismuth vanadate content of the thermoplastic molding composition is in the range of 0.1 to 2.0 weight%, 0.2 to 1.0 weight%, or 0.3 to 0.5 weight%. Claim 8 A thermoplastic molding composition according to claim 6 or 7, comprising 0.1 to 2.0 weight% of at least one yellow organic pigment as component D. Claim 9 A method for manufacturing a pigment composition according to claim 1, or a thermoplastic molding composition according to any one of claims 5 to 7, comprising mixing the components of the composition. Claim 10 A thermoplastic molding composition used to form a molded article in any one of paragraphs 5 to 7. Claim 11 A molded article made of a thermoplastic molding composition according to any one of paragraphs 5 to 7. Claim 12 A thermoplastic molding composition used to form a fiber or foil in any one of claims 5 to 7. Claim 13 Fiber or foil manufactured from a thermoplastic molding composition according to any one of paragraphs 5 to 7. Claim 14 delete

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