Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
  • C09B67/0084—Dispersions of dyes
  • C09B67/0085—Non common dispersing agents
  • C09B67/009—Non common dispersing agents polymeric dispersing agent
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
  • C08K3/013—Fillers, pigments or reinforcing additives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0041—Optical brightening agents, organic pigments
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0001—Post-treatment of organic pigments or dyes
  • C09B67/0004—Coated particulate pigments or dyes
  • C09B67/0008—Coated particulate pigments or dyes with organic coatings
  • C09B67/0013—Coated particulate pigments or dyes with organic coatings with polymeric coatings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L35/00—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 a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers

Definitions

• the present invention relates to pigment concentrates for the coloration of thermoplastics containing at least one pigment and at least one copolymer wax, the latter being produced from a long-chain ⁇ -olefin and an unsaturated polycarboxylic acid or its anhydride.
• pigment concentrates or pigment preparations for coloring thermoplastics contain, in addition to the pigment, polar or nonpolar components as dispersing aid, and optionally also polymers as support material.
• Premixing of the pigment with the dispersing aid allows efficient digestion of the pigment agglomerates and an effective distribution of the color particles. This is the prerequisite for efficient coloring in the
• pigment, dispersion aid and carrier material are prepared by means of effective mixing technologies, ie. H. using appropriate
• Dispersing devices eg. B. screw extruder, heated mills or kneaders mixed. Significantly, the entry is sufficiently high
• dispersing aids in pigment concentrates serve z.
• fatty acid derivatives and non-crystalline or partially crystalline polar or nonpolar homo- or copolymers, especially those with low molecular weights, eg. B. waxes.
• From DE-A-4 236 337 the use of low molecular weight polymers of acrylic acid C 2 -C 22 -alkyl esters as dispersing aids for solids, inter alia
• Pigments known in organic media.
• the synthesis is complicated and is carried out by free-radical polymerization of acrylic acid-CrC ⁇ alkyl esters and subsequent transesterification of the polymers with C 12 -C 22 alkyl or
• Units derived from esters of unsaturated monocarboxylic acids and units derived from styrene or methyl-substituted styrene can be used as a constituent of pigment concentrates for coloring thermoplastics.
• the measurement parameters filter pressure and color strength, the copolymers show good but not optimal
• Free-radically synthesized copolymers of long-chain ⁇ -olefins and maleic anhydride are known.
• Reaction products of long-chain olefins with maleic anhydride are furthermore known from DE-A-3 510 233.
• EP-A-1 693 047 discloses copolymer waxes for cosmetic, pharmaceutical and dermatological preparations prepared from C 26 -C 6 o- ⁇ -olefins and maleic anhydride.
• the waxes are emulsifiable, they are suitable for the consistency of pastes, creams and pencils and are characterized mainly by a high water resistance. They also improve that
• copolymer waxes prepared from long-chain ⁇ -olefins and unsaturated polycarboxylic acids or their
• Anhydrides are outstandingly suitable as a component for the preparation of pigment concentrates for coloring thermoplastic materials.
• the plastic materials colored with such pigment concentrates show high color strengths and good homogeneities. Their melts have low filter values, which is equivalent to effective dispersion of the pigment particles.
• the preparation of the copolymer waxes contained in the pigment concentrates as dispersing aids is particularly simple since only two components have to be reacted with one another.
• the invention therefore pigment concentrates for coloring of thermoplastic materials, containing
• At least one copolymer wax prepared by reacting long-chain olefin hydrocarbons in the chain length range
• Ci 2 -C 6 O preferably C24-C60 > particularly preferably C28-C60 derived
• thermoplastic polyolefin optionally at least one thermoplastic polyolefin.
• Both chain-pure ⁇ -olefins and ⁇ -olefin mixtures can be used for the preparation of the copolymer waxes, as z. B. incurred in the known production process as distillation cuts or distillation residues.
• the unsaturated polycarboxylic acids or anhydrides used for the reaction with the ⁇ -olefins are maleic acid, fumaric acid, citraconic acid, mesaconic acid, aconitic acid or itaconic acid or the anhydrides of these polycarboxylic acids, if available. Preference is given to maleic anhydride. It is also possible to use mixtures of these polycarboxylic acids and anhydrides in any ratios.
• the preparation of the copolymer waxes according to the invention is carried out in a manner known per se by reacting the abovementioned components at elevated temperature with addition of organic or inorganic compounds
• the reaction may be carried out in the presence or absence of a solvent. The latter method is preferred. Furthermore, the reaction can both batchwise batchwise, z. B. in a stirred tank or in a continuous reactor.
• radical copolymerization of ⁇ -olefins with maleic anhydride generally results in approximately alternating copolymer structures.
• the molar use ratio of polycarboxylic anhydride and ⁇ -olefin is therefore preferably between 0.4: 0.6 and 0.6: 0.4. This results when using a commercially available ⁇ -olefin in the typical chain length range of C28-C 5 2 with an average molecular weight of about 500 g / mol one
• Use amount based on ⁇ -olefin, of about 13 to 29 wt .-% anhydride.
• Preferred maleic anhydride inserts for such olefin raw materials are between 14 and 20, more preferably between 15 and 18 wt .-%.
• Suitable organic initiators are, for. B. peroxides, for example
• any other initiator comes into question, provided that it decomposes into radicals at the chosen reaction temperature and is able to initiate the reaction.
• the initiators are used in an amount of from 0.1 to 10% by weight, preferably from 0.5 to 5.0% by weight, based on the ⁇ -olefin used.
• the reaction temperatures are when the reaction is in the absence of
• Solvent is carried out, above the melting temperature of the ⁇ -olefin, z. B. between 1 ⁇ and 2üö 1 C, vorzuyi. 120 to 180 ° C., more preferably between 140 and 170 ° C. In the presence of solvents, depending on the dissolving power, reaction temperatures below the melting point of the ⁇ -olefin are also possible.
• pigments are suitable, which are used for the coloring of plastics. Both inorganic and organic pigments come into question.
• inorganic pigments include carbon black, metal powders, metal oxides such as titanium dioxide, zinc oxide and iron oxides, metal sulfides, silicates such as ultramarine blue, chromates and vanadates.
• organic pigments examples include azo or disazo pigments, laked azo pigments, metal phthalocyanine, quinacridone, perylene, dioxazine,
• the pigment concentrates according to the invention may further homo- or copolymeric thermoplastic polyolefins such as.
• polyethylene with high (PE-HD) or low density (PE-LD, PE-LLD) polypropylene, polystyrene or copolymers with fractions of heteroatom-containing monomers, eg.
• PE-HD polyethylene with high
• PE-LD low density
• PE-LLD polypropylene
• polystyrene or copolymers with fractions of heteroatom-containing monomers eg.
• ethylene-vinyl acetate copolymers or ethylene (meth) acrylic acid copolymers ethylene-vinyl acetate copolymers or ethylene (meth) acrylic acid copolymers.
• the concentrate may contain, in addition to the coloring pigment, the copolymer wax and optionally the thermoplastic polyolefin, additional pigment dispersion favoring components, such as fatty derivatives, such as fatty acid esters or soaps or waxes of natural or synthetic origin, eg. B.
• additional pigment dispersion favoring components such as fatty derivatives, such as fatty acid esters or soaps or waxes of natural or synthetic origin, eg. B.
• Polyoblock waxes contain. As a result of growth, growth and growth may occur.
• Waxes of natural origin such as montanic or carnauba wax or, for example, oxidative ones, are also suitable
• Bleaching or other chemical derivatization e.g. B. saponification accessible by-products.
• Corresponding materials and manufacturing processes are z. In Ullmann's Encyclopedia of Industrial Chemistry, 5 th ed. 1996, Vol. A 28,
• the pigment concentrates according to the invention contain from 10 to 70% by weight of one or more pigments, from 1 to 60% by weight of the copolymer wax prepared from ⁇ -olefin and unsaturated polycarboxylic acid or its anhydride and from 0 to 60% by weight of one or more thermoplastic polyolefins.
• the pigment concentrates preferably contain from 20 to 60% by weight of pigment, from 10 to 40% by weight of copolymer wax and from 10 to 50% by weight of polyolefin.
• pigment concentrates according to the invention up to 5 wt .-% stabilizing additives such. As antioxidants or sunscreens may be included.
• the invention further relates to a plastic molding compound or a
• Pre-mix individual components in suitable mixing units This can be done in a known manner by hot or cold mixing.
• Copolymer wax and, if appropriate, further waxes can be used in coarse-to-finely divided or else micronized form, in an ielzlerem case, for example, with average particle sizes (d 50 values) between 5 and 15 microns.
• the micronization can be achieved by spraying the wax melt or by grinding, z. B. by means of air jet mills. Spraying or grinding may be followed by classification.
• the actual pigment dispersion is then carried out by melting and kneading the premix in an extruder or kneader.
• the melt is then in a conventional, known from polymer technology, for. B. processed into granules or pellets.
• the pigment concentrates according to the invention are suitable for coloring thermoplastically processable polymers of various compositions, for example polyolefins such as polyethylene, copolymers of ethylene with other nonpolar or polar olefins, polypropylene and polybutadiene or polystyrene, furthermore polyalkylene terephthalate, poly (meth) acrylate, polyamide, polyvinyl chloride, polyacrylonitrile , Polysulfone, polyether ketone, polyoxymethylene, acrylonitrile-butadiene-styrene terpolymers and the like.
• polyolefins such as polyethylene, copolymers of ethylene with other nonpolar or polar olefins, polypropylene and polybutadiene or polystyrene, furthermore polyalkylene terephthalate, poly (meth) acrylate, polyamide, polyvinyl chloride, polyacrylonitrile , Polysulfone, polyether
• the dynamic viscosities of the copolymer waxes were determined in the melt according to DIN 53019-1 to 3 with a rotational viscometer, the dropping points using an apparatus of the FP 900 type from Mettler according to ASTM D 3954.
• the acid number determination was carried out according to DIN 53402, with the difference that the solvents used toluene and ethanol were used in anhydrous form in order to avoid a hydrolytic splitting of the anhydride groups.
• the particle size analysis in micronisates was determined by laser diffraction using a Mastersizer 2000 (Malvern) instrument using the
• resulting copolymer wax was 80 mg KOH / g, the viscosity at 90 0 C 329 mPa * s, the dropping point 74 0 C.
• the copolymer wax was used either in coarsely ground (laboratory mill, grain size dioo ⁇ 2 mm, "fine grain”) or in micronized form ("micronisate”).
• the micronization was carried out by grinding on an air jet mill 100 AFG (Hosokawa Micron) and resulted in finely powdered product with a Dio value of ⁇ 30 microns and a dso value of 8.0 microns.
• the coarsely ground or micronized copolymer wax was in a
• filter value F Gear pump pressed through a sieve filter and measured before the filter pressure building up. The worse the pigment is dispersed, the higher the pressure build-up in front of the filter. As a measure of the filter pressure is determined by the following relationship "filter value" F:

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Dispersion Chemistry (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Processes Of Treating Macromolecular Substances (AREA)
• Pigments, Carbon Blacks, Or Wood Stains (AREA)

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• 2009
  • 2009-07-28 DE DE102009034914A patent/DE102009034914A1/de not_active Withdrawn
• 2010
  • 2010-07-26 WO PCT/EP2010/004560 patent/WO2011012276A2/de not_active Ceased
  • 2010-07-26 JP JP2012522017A patent/JP6101487B2/ja not_active Expired - Fee Related
  • 2010-07-26 EP EP10737786.3A patent/EP2459631B1/de not_active Not-in-force
  • 2010-07-26 US US13/387,487 patent/US8716384B2/en not_active Expired - Fee Related

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