3417 results about "Coloring agents" patented technology

A fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a first alkali metal salt of a nonpolymeric saturated carboxylic acid, specifically, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a second alkali metal salt of a nonpolymeric saturated carboxylic acid, specifically, sodium benzoate (SB), for providing metal sodium ions dispersed in the water when the at least one alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent and also inhibiting surface corrosion reactions involving metals contacting the mixed retardant solution, including specific metals, namely 2024-T3 Aluminum, 4130 Steel, Yellow Brass, and Az31B Magnesium; a minor amount of thickening agent in the form of a biomolecular polymer consisting of polysaccharides, for increasing the viscosity of the mixed retardant liquid during application operations; a minor amount of coloring agent in the form of fugitive color dye powder, or non-fugitive pigment powder, for imparting a visible color (e.g. red or green) when the fire retarding biochemical liquid composition is applied to a surface to be protected against fire, as water molecules in the retardant liquid coating evaporate to the environment during drying, to form a thin fire retardant coating deposited on the treated surfaces having a characteristic visible color, and comprising potassium and sodium salt crystals mixed within the polysaccharides of the biomolecular polymer. Wet and dry concentration formulations of the fire retarding biochemical liquid composition are disclosed for use with both serial and ground delivery methods and apparatus.

The invention provides a photosensitive resin composition, a color filter and a manufacturing method thereof, and a liquid crystal display device. The photosensitive resin composition includes a colorant (A) including a triphenylmethane colorant (A-1), an alkali-soluble resin (B), a compound (C) having an ethylenically unsaturated group, a photoinitiator (D), and a solvent (E), in which in an electron spin resonance spectrogram of the photosensitive resin composition, a g value corresponding to a characteristic peak with the maximum intensity is 1.8000-2.0400.

A multi-layer seal formed with a first layer for visual detection of leak by incorporating coloring agent that is water soluble, a second layer for electrical detection of a leak by a sensor, the second layer incorporating disbursable agent which disburses into the water upon contacting water and causing a change in chemical, and / or electrical property of the water, and a third layer made of water swelling material which swells upon contact with water. The three layers may be arranged in an orientation wherein a leak would first reach the first layer, then reach the second layer, and lastly reach the swelling layer. The sealing layer arrangement may be correlated to the fluid flowing direction. The layers may form independent parts placed side-by-side or may be integrated into a single seal loop.

The invention discloses a plant leaf imitating hydrogel composite material and a preparation method thereof, and belongs to the field of bionic composite materials. The preparation method comprises the following steps: firstly, preparing printing paste by compounding a coloring agent, printing a fabric to obtain a green fabric capable of simulating spectral characteristics of green peaks and red edges of plant leaves, and simulating fence tissues and skeletons in a leaf structure by using the green fabric; then taking a biological material polyvinyl alcohol (PVA) as a base material, adding a monomer with strong hygroscopicity, a cross-linking agent and an initiator, and blending to prepare a hydrogel prepolymer solution; and finally, pouring the hydrogel prepolymer solution into a mold containing the green fabric for copolymerizing, so that hydrogel is directly formed on the surface of the fabric and in pores, and the plant leaf imitating hydrogel composite material is obtained. The material gets rid of dependence on moisture absorption salt, and has the advantages of stable water absorption and simulation effects, good durability and the like.

The invention relates to the technical field of epoxy molding compounds, in particular to a low-shrinkage and high-heat-resistance epoxy molding compound and a preparation method thereof. The low-shrinkage and high-heat-resistance epoxy molding compound is prepared from the following raw materials in parts by weight: 6 to 8 parts of epoxy resin, 3 to 7 parts of phenolic resin, 80 to 90 parts of filler, 0.6 to 1 part of modifier, 0.1 to 0.5 part of accelerant, 0.2 to 0.4 part of coupling agent, 0.3 to 0.8 part of flexibilizer, 0.2 to 0.4 part of release agent, 0.2 to 0.4 part of coloring agent and 0.3 to 0.5 part of flame retardant, the modifier is a mixture of 1-phenyl-5-mercaptotetrazole and 5-aminotetrazole according to a weight ratio of 5: (1 to 5); the prepared epoxy molding compound has the characteristics of low shrinkage and high heat resistance.

The invention provides a probiotic enteric dry suspension as well as a preparation method and application thereof, and relates to the technical field of pharmaceutical preparations. The probiotic enteric dry suspension comprises the following components in parts by mass: 1-8 parts of probiotic powder; 25 to 60 parts of a microcapsule cross-linking system; 1-15 parts of a suspending aid; 20 to 70 parts of a filling agent; 0-0.1 part of a coloring agent; and 0-1 part of an aromatic. According to the invention, when the probiotic powder is dispersed in water by utilizing the gelling property of sodium alginate, the probiotic powder is wrapped to form a probiotic-sodium alginate compound, citric acid and calcium carbonate are subjected to an acid-base reaction, and generated carbon dioxide bubbles can prevent the probiotic-sodium alginate compound from agglomerating; meanwhile, the released calcium ions and chitosan interact with the probiotic-sodium alginate compound, a compact probiotic microcapsule structure is rapidly and stably formed in one step, the probiotics in the microcapsule are effectively protected from being damaged by gastric acid and bile, the survival rate of the probiotics is increased, and the enteric effect is achieved.

According to the new energy automobile engine crankshaft near-net-shape forming process method, a placing mechanism comprises a placing box, two opening and closing doors are installed on the front side of the placing box, the two opening and closing doors are arranged in a bilateral symmetry mode, and observation windows are arranged on the opening and closing doors; through mutual cooperation of the L-shaped fixing plate, the clamping gear, the central gear, a rocking handle, a fixing plate, an annular plate, a guide plate, a sliding plate, a clamping plate, an attaching rod, a driven groove wheel, a belt, a driving groove wheel, a motor, a bottom plate and the like, when a crank needs to be dyed, the crank can be clamped and fixed, meanwhile, the crank can be driven to rotate, and the crank can be conveniently and rapidly dyed. According to the crank dyeing device, through mutual cooperation of the vertical plate, the lifting plate, the transverse plate, the vertical pipe, the connecting rod, the circular plate, the pretreatment box, the cleaning agent box, the coloring agent box and other parts, the crank can be pretreated, colored and cleaned.

The invention relates to the field of epoxy molding compounds, and discloses an epoxy molding compound as well as a preparation method and application thereof. The epoxy molding compound contains a heat-conducting filler, epoxy resin, a curing agent, a curing accelerator, a coupling agent, a bonding modifier, a flame retardant, a coloring agent, a release agent, hydroxyl-terminated silicone oil and a dispersing wetting agent. The heat-conducting filler contains aluminum oxide, crystalline silicon dioxide powder and molten spherical silicon dioxide powder; the bonding modifier is a triazole compound or a gallic acid compound; the weight ratio of the hydroxyl-terminated silicone oil to the heat-conducting filler to the bonding modifier is (1.5-4): (700-800): 1. The epoxy molding compound has the advantages of favorable molding process property, excellent heat-conducting property and high adhesive strength, and is suitable for being used as a packaging material of a fully-packaged power module.

The invention provides a high-insulation black organic silicon coloring agent and a preparation method thereof. The high-insulation black organic silicon coloring agent comprises the following raw materials in parts by mass: 100 parts of a silicone oil carrier; 3-5 parts of passivated carbon black; 1-3 parts of fumed silica; wherein the passivated carbon black comprises carbon black and an organic silicon layer coated on the surface of the carbon black; the organic silicon layer is obtained by graft polymerization of polymethyltriethoxysilane and a functionalized silane coupling agent on the surface of the carbon black; the functionalized silane coupling agent comprises at least one of an aryl silane coupling agent and a fluorine-containing silane coupling agent. According to the black coloring agent, the advantage of high blackness of carbon black is maintained, meanwhile, the electric insulation performance and dispersion stability of the black coloring agent in a silicone oil system are remarkably improved, the problems that the carbon black is high in conductivity, poor in interface compatibility and prone to agglomeration are solved, and the black coloring agent is especially suitable for being applied to organic silicon materials with the high requirement for the insulation performance.

The invention provides a low-warpage low-viscosity liquid molding compound, a preparation method thereof and a chip packaging method. The liquid molding compound comprises the following components in parts by mass: 80-90 parts of a filling agent, 1.5-4.5 parts of first epoxy resin, 10-15 parts of a mixture, 1-3 parts of a curing agent, 0.2-0.5 part of an accelerant and 0.1-0.3 part of a coloring agent, wherein the mixture is formed by compounding second epoxy resin and silica powder, the mass ratio of the second epoxy resin to the silica powder is 60%: 40%, and the second epoxy resin is the same as the first epoxy resin; the second epoxy resin and the silica powder are compounded according to the mass ratio of 60%: 40% to prepare the mixture, so that the silica powder can be fully dispersed in the second epoxy resin, the compatibility of the silica powder with the filler and the first epoxy resin is improved, the gap between the filler and the silica powder is reduced, and the viscosity, thixotropy and warpage of the glue solution are further reduced.

The invention discloses a method for detecting the percentage of the contact area of matching surfaces of parts. The method comprises the following steps: 1) selecting a part A and a part B with matching surfaces; (2) a coloring agent is evenly smeared on the matching face of the part A; (3) the part A and the part B are assembled, and the matching surfaces are tightly attached; (4) the part B is taken down, and the coloring agent attached to the part B is rubbed to rubbing paper; 5) calculating the coverage area of the coloring agent on the rubbing paper, and 6) finally calculating the percentage of the contact area of the matching surfaces of the part A and the part B. According to the method, the contact area of the matching surfaces can be quantified efficiently and accurately, and the uniformity of the coloring agent is improved by converting the coloring position and method.

The invention discloses a double-85-resistant long carbon chain nylon material as well as a preparation method and application thereof. The double-85-resistant long carbon chain nylon material is prepared from the following components in percentage by mass: 5-12% of a compatilizer, 3-10% of epoxy resin, 3-10% of a nylon hot melt adhesive, 1-3% of a coloring agent, 0.2-1% of an antioxidant, 0.2-0.7% of a lubricant, 0.2-0.5% of a heat stabilizer and the balance of polyamide resin. Through the innovative material and process design, the bonding strength of the bonding layer between the long-chain nylon and the thermoplastic elastomer (TPE) can be remarkably improved, and it is ensured that the key connecting part can still maintain the excellent bonding performance without failure even though the key connecting part is subjected to long-term high-temperature, high-humidity and other extreme environments.

The invention discloses a coloring agent for an organic silicon product and a preparation method of the coloring agent, and belongs to the technical field of fine chemical engineering, and the coloring agent is characterized by being prepared from the following raw materials in parts by weight: 40 to 60 parts of inorganic pigment, 30 to 50 parts of silicone oil and 2 to 7 parts of dispersing agent; the dispersing agent comprises modified sodium alginate and lauryl sodium sulfate in a weight ratio of 1: (0.5-1.2), and the effects of solving the problems that the inorganic pigment is easy to form aggregates and poor in coloring effect are achieved.

The invention relates to blue high borosilicate glass and a preparation method thereof, and belongs to the technical field of glass manufacturing, and the blue high borosilicate glass comprises the following raw materials in parts by weight: 50-60 parts of silicon dioxide, 10-15 parts of boron oxide, 2-3 parts of aluminum oxide, 6-8 parts of alkali metal oxide, 3-4 parts of a compound clarifying agent and 1-3 parts of a modified coloring agent. According to the technical scheme, the cobalt blue pigment is coated with mesoporous silica, and the composite material is obtained; combining the composite material with a silane coupling agent to obtain a silanized composite material; combining the silanized composite material with boric acid ester to obtain a modified coloring agent; the prepared modified coloring agent enables the high borosilicate glass to have remarkable blue color and to be stable in color and not prone to volatilization under high-temperature and high-pressure conditions, the added composite clarifying agent is formed by mixing cerium dioxide, sodium sulfate and tin oxide, the clarity of the glass is improved, volatilization of boron is effectively reduced, and the service life of the glass is prolonged. The mechanical property and the stability of the high borosilicate glass are generally improved, and the quality of the glass is improved.

The invention relates to the technical field of display devices, in particular to ink for an LED mask, a preparation method of the ink and a preparation method of the LED mask. The ink for the LED mask comprises the following components in percentage by mass: 35%-50% of matrix resin, 25%-40% of a diluent, 15%-25% of a coloring agent, 2%-4% of an accelerant, 2%-4% of an anti-settling agent, 0.1%-1.2% of a weather-proof agent, 0.5%-1% of a dispersing agent, 0.4%-0.6% of a defoaming agent and 0.4%-0.6% of a flatting agent, wherein the coloring agent comprises pigment carbon black of which the blackness is less than or equal to 20; the weather-resistant agent comprises an ultraviolet absorbent and a free radical trapping agent in a mass ratio of (1-3): (1-3). According to the ink for the LED mask, the contrast ratio of the LED mask is improved, meanwhile, the ink color consistency and weather resistance of the LED mask are effectively improved, and therefore the color developing effect of an LED display screen is optimized, and the service life of the LED display screen is prolonged.

The invention belongs to the technical field of silicon nitride ceramic preparation, and particularly relates to a method for preparing silicon nitride ceramic through lifting type LCD photocuring technology 3D printing, and the method comprises the following steps: carrying out oxidation pretreatment on silicon nitride powder; mixing a sintering aid silicon nitride powder to obtain mixed powder; mixing the mixed resin, a reactive diluent, a photoinitiator and a coloring agent to obtain photosensitive resin; mixing and ball-milling a dispersing agent, the mixed powder and photosensitive resin to obtain light-cured ceramic slurry; 3D printing is conducted on the photocuring ceramic slurry through a lifting type LCD photocuring technology, and a ceramic green body is obtained; dumping the ceramic body to obtain a ceramic green body; sintering the ceramic green body to obtain the silicon nitride ceramic. Compared with the prior art, the problems of low curing depth, curing efficiency and precision of the silicon nitride ceramic slurry formed by photocuring in the prior art are solved. According to the scheme, the silicon nitride ceramic is formed by using the lifting type LCD printing technology, so that the performance of the ceramic is ensured, the production efficiency is improved, and the production cost is reduced.

Provided is a recording liquid set including: a pretreatment liquid containing a cationic component, a resin, and water; and an aqueous white inkjet ink containing a white-colored colorant, an organic solvent, and water, wherein the aqueous white inkjet ink has a static surface tension of 20 to 40 mN / m at 25 °C, the aqueous white inkjet ink has a static surface tension at 25 °C that is greater than a static surface tension at 25 °C of the pretreatment liquid, and an amount of the white-colored colorant in the aqueous white inkjet ink is 15 to 100 times an amount of the cationic component in the pretreatment liquid.

An assembly (3) for dispensing a liquid, in particular a colorant for paints, comprising a container (4) for containing the liquid, a pump (5), a valve (6), at least one dispensing opening (23, 24), and comprising or being associated with a controller (7) arranged to operate the pump (5) and the valve (6) to draw liquid from the container (4) and to dispense liquid via the opening (23, 24), and to operate the pump (5) and the valve (6) to dispense liquid via the dispensing opening (23, 24). 24) flushes the liquid from the pump (5) to the container (4).

A light absorption filter that contains a resin; a dye having a main absorption wavelength band in a wavelength range of 400 to 700 nm, including at least one of a specific azo-based coloring agent represented by any of General Formulae (i) to (iv) or a specific indoaniline-based coloring agent represented by General Formula (v); and a compound that generates a radical upon ultraviolet irradiation. There is also an optical filter that uses the light absorption filter and a manufacturing method for the optical filter, as well as an organic electroluminescent display device, an inorganic electroluminescent display device, or a liquid crystal display device, which includes the optical filter.

The invention discloses a method for preparing a light-transmitting gradient multicolor zirconium oxide material through photocuring, which comprises the following steps: preparing modified aluminum oxide which is formed by attaching a strontium element and a chromium element to the surface of aluminum oxide; preparing bottom-layer slurry, middle-layer slurry and upper-layer slurry from the zirconium-aluminum powder; the bottom layer slurry comprises zirconium aluminum powder and a coloring agent; the middle layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; the upper-layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; preparing a bottom layer green body by using the bottom layer slurry through 3D printing by using the photocuring slurry, preparing a middle layer green body on the surface of the bottom layer green body by using the middle layer slurry, and preparing an upper layer green body on the surface of the middle layer green body by using the upper layer slurry, so as to obtain a zirconium oxide material green body; the light-transmitting gradient multicolor zirconia material with gradient light transmission and gradient color is directly prepared through 3D printing, the color of the light-transmitting gradient multicolor zirconia material is closer to that of real teeth, and the strength and toughness are not reduced.

The invention discloses an efficient polyester color master batch and a preparation method thereof, and relates to the technical field of polyester color master batches. The high-efficiency polyester color master batch is prepared from the following raw materials in parts by mass: 40-70 parts of a polyamide carrier, 20-50 parts of a coloring agent, 5-15 parts of a dispersing agent, 1-5 parts of a lubricating agent and 0.5-3 parts of an antioxidant. The special antioxidant specially designed for a polyamide carrier is adopted, the compatibility with the carrier is improved based on the principle of similar dissolves, the problem that a traditional antioxidant is uneven in dispersion to form an anti-oxidation blind area is fundamentally solved, meanwhile, volatilization and migration in the processing process are inhibited by means of high thermal stability of the molecular structure of the antioxidant, and the anti-oxidation performance of the carrier is improved. The color master batch endows a polyester product with a longer anti-oxidation protection effect, and the problems of yellowing, chromatic aberration and the like caused by oxidation in the processing and using processes of the product can be effectively reduced.

According to the preparation method of the radiation refrigeration colored coating with the double-layer structure, absorption of ultraviolet-visible light and near-infrared wave bands is weakened and heat input is reduced by adding a fluorescent coloring agent and designing a bottom strong reflection layer, meanwhile, high-emissivity varnish is selected as a base material, and the radiation refrigeration colored coating with the double-layer structure is prepared. The capability of emitting heat outwards in a middle and far infrared radiation form of the colored paint is improved, so that efficient cooling is realized. The prepared colored paint has rich and adjustable colors and a good cooling effect, is low in cost and simple in process, and is expected to be applied to the fields of high-power electronic equipment, building heat management and the like.

The invention discloses a preparation method of a bio-based cellulose nano colorant, which comprises the following steps: (1) cutting absorbent cotton into pieces, and grinding to obtain cellulose powder; (2) mixing the cellulose powder with sulfuric acid, stirring and hydrolyzing under a water bath condition, then adding deionized water into a reaction solution, centrifuging, dispersing and dialyzing to prepare a pure fiber suspension; (3) performing high-pressure homogenization on the pure fiber suspension to obtain nano cellulose; and (4) preparing nanocellulose into a nanocellulose suspension, then adding the indigo dye dispersion liquid and a surfactant, carrying out ultrasonic treatment, and cooling to room temperature to prepare the bio-based cellulose nano colorant. The insoluble dye indigo blue is dispersed and then added into the nanocellulose to prepare the insoluble dye type nanocellulose coloring agent, so that the coloring agent has high color depth and good stability.

The invention relates to the technical field of medical materials, in particular to an injection composition for endoscopic submucosal dissection and a preparation method and application thereof. The injection composition is prepared from the following raw materials: 1 to 5 w / v percent of sodium hydroxymethyl starch, 0.1 to 10 w / v percent of acetylcysteine, 0.2 to 4 w / v percent of polyvinylpyrrolidone, 0.001 to 0.1 w / v percent of coloring agent and the balance of phosphate buffer solution. The injection composition disclosed by the invention can be directly injected under mucous membranes, plays a role in upheaving diseased regions, has the advantages of long maintenance time and high upheaving degree, and has the effects of stopping bleeding and promoting wound healing.

The present invention provides a colored resin composition capable of forming high-brightness pixels. The colored resin composition of the present invention contains: (A) a colorant, (B) a solvent, (C) an alkali-soluble resin, and (D) a photopolymerization initiator, wherein the colorant (A) contains a zinc phthalocyanine dye (a1), and in a thin film X-ray diffraction spectrum of the zinc phthalocyanine dye (a1) using CuKα rays after heating at 230°C, the zinc phthalocyanine dye (a1) has a maximum peak in the range of a diffraction angle (2θ) of 2 to 5°.

Disclosed in the present invention are a 90°C thermoplastic halogen-free low-smoke flame-retardant polyolefin sheath material and a preparation method therefor. The sheath material is prepared from raw materials comprising the following components in parts by mass: 20-40 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a linear low-density polyethylene, 2-10 parts of a high-density polyethylene, 20-40 parts of a metallocene ethylene-octylene copolymer, 10-15 parts of a maleic-anhydride-grafted metallocene linear low-density polyethylene copolymer, 58-73 parts of aluminum hydroxide, 20-25 parts of modified magnesium hydroxide, 64-84 parts of a synergistic flame retardant, 2-3 parts of a coupling agent, 1-4 parts of a lubricant, 1-3 parts of an antioxidant, and 2-7 parts of a coloring agent, wherein the synergistic flame retardant comprises lithium oxide. A matrix resin has low-temperature performance, mechanical properties and cracking resistance. With regard to flame retardance, a large amount of the synergistic flame retardant, i.e., lithium oxide, is added to a traditional magnesium-aluminum compound flame-retardant system, and therefore an off-white hard shell can be formed during a combustion process while low heat release is ensured, thereby ensuring no dripping during the combustion process.

The invention belongs to the field of medical instrument coloring agents, and provides a natural anthocyanin endoscope coloring agent. According to the invention, the innovative design of combining a ternary color-stabilizing compound formed by anthocyanin, a co-chromophore and hydroxypropyl beta cyclodextrin with a chitosan sodium alginate polysaccharide system and a composite buffer system is adopted, and the viscosity is controlled to be 200-320 millisecond, the particle size of spray droplets is 40-60 microns, and the thickness of a thin film is 10-30 microns through specific molar ratio compatibility and a genipin crosslinking technology. Through accurate regulation and control, the excellent performance that a double-network thin layer is formed under the calcium ion environment that the absorbance retention rate at 520 nanometers is not lower than 90% and the elution rate is not lower than 90% under the irradiation of hundred thousand lux white light is achieved, the technical problems that a traditional endoscope coloring agent is poor in safety, low in stability and insufficient in mucous membrane contrast ratio are solved, and the wide clinical application value is achieved.

The invention discloses a brake disc manufacturing process, and relates to the technical field of brake disc manufacturing. The brake disc manufacturing process specifically comprises the following steps that S1, a casting is purchased, and machining operation is conducted on the casting, so that an initial disc is obtained; s2, carrying out first cladding operation on the disc surface of the initial disc; according to the manufacturing process of the brake disc, while color individuation of the brake disc is guaranteed, the color of a disc body of the brake disc is guaranteed by applying a laser cladding technology, and one or more special metal or nonmetal wear-resistant layers are formed on the surface of the brake disc, so that the wear resistance and the rust resistance of the brake disc are improved, the attractiveness is improved, and the attractiveness and individuation of the brake disc are improved; the automobile brake disc is subjected to surface treatment through laser coating, the metal coating is formed, coloring agent materials such as metal or metal compounds or ceramic are added while laser coating is conducted, color changing of multiple colors can be conducted on the brake disc, and the effect that the brake disc is not discolored after long-term operation can be kept.

The invention belongs to the technical field of conveyor belt detection, and particularly relates to a conveyor belt tearing detection device and method, and the conveyor belt tearing detection device comprises a detection assembly and a mark dyeing assembly; the detection assembly comprises a visual camera, an image processing unit, a control unit and an alarm unit; the marking and dyeing assembly is used for marking the crack position of the conveying belt; the mark dyeing assembly comprises a storage box and an electric control spray head; a coloring agent is added into the storage box; the electric control spray head is communicated with the storage box through a guide pipe; the detection assembly is used for monitoring the tearing condition of the conveying belt, and when the visual camera finds that cracks appear at the local position of the conveying belt, the control unit sends an alarm signal to the outside through the alarm unit and controls the electric control spray head to spray a coloring agent at the corresponding tearing part, so that the crack position of the conveying belt is dyed and marked; and then related personnel can quickly find the cracks through the marked point positions during maintenance, so that the conveying belt can be conveniently repaired.

Electromobility components with a color difference ΔE <20 from the L*a*b* coordinates to a color number beginning with “2” of the RAL color chart, containing polymer compositions based on at least one polyester and a colorant with a mean particle size d50 to be determined according to ISO 13320 by laser diffractometry in the range of 1 to 12 µm, containing 9,9'-oxybis-12H-phthaloperin-12-one, 9,10-oxybis-12H-phthaloperin-12-one and 10,10'-oxybis-12H-phthaloperin-12-one in the ratio of 1 : 1 : 0.8 -1.5 to 1 : 1.5 : 0.8 - 1.5, wherein the polymer compositions contain 0.01 to 5 mass parts of colorant per 100 mass parts polyester.