Color concentrate compositions, methods of making the same, and corresponding polyolefin articles

Abstract

The present application relates to a kind of polymer, color masterbatch composition and corresponding polyolefin product. By designing and synthesizing the alternating copolymer of maleic anhydride and vinyl monomer, the polar succinic anhydride segment and the non-polar long carbon hydrocarbon segment are alternately formed on the main chain of the alternating copolymer, further increase the steric hindrance effect of polymer and the dispersion and coating effect of pigment. The alternating copolymer of maleic anhydride and vinyl monomer and low molecular weight polyethylene wax are used as dispersant in color masterbatch composition, which can improve the dispersion performance and aging resistance of pigment, and the final polyolefin product has lower color difference, more stable coloring performance and better ultraviolet aging resistance. At the same time, the light component by-product alpha olefin dimer produced in the process of alpha olefin coordination polymerization is also used to expand the application field of low molecular weight poly-alpha olefin and improve its economic value.

Description

Technical Field

[0001] This invention belongs to the technical field of polymer dispersant synthesis and masterbatch formulation, and specifically relates to a polymer, masterbatch composition, preparation method thereof, and corresponding polyolefin products. Background Technology

[0002] Currently, using masterbatch to color polyolefin products is the most common method. Masterbatch refers to an aggregate made by uniformly loading an extraordinary amount of pigment into a thermoplastic resin through a special method; it is also known as pigment concentrate and is a new type of high-efficiency colorant specifically for polymer materials. The primary condition for applying masterbatch to plastic products is that the pigment can be uniformly dispersed in the plastic, thereby giving the plastic a rich color without affecting other properties of the plastic product. Poor pigment dispersion in the carrier resin can easily cause discolored spots or streaks on the surface of polyolefin products, thus affecting the appearance, gloss, and transparency of the polyolefin products.

[0003] To improve the strength, transparency, and gloss of plastic products and enhance pigment utilization, it is necessary to improve the dispersibility of pigments in masterbatches and reduce the average particle size of pigments. Whether pigments can achieve optimal dispersion in the carrier resin of masterbatches depends mainly on three factors: the characteristics of the pigments themselves, efficient processing equipment, or efficient dispersants.

[0004] Regardless of the chosen processing method for masterbatch, the characteristics of the dispersant used in the formulation play a decisive role in the pigment dispersion effect. During the masterbatch processing stage, the dispersant penetrates into the voids and pores within the pigment aggregates, reducing the surface tension and mutual attraction of the particles, efficiently transmitting the shear force of the equipment, and thus effectively breaking up the aggregated pigment particles. Furthermore, the dispersant also coats the pigment particles, using charge repulsion, spatial isolation, or entropy effects to prevent further aggregation of the refined pigment particles, thereby exerting its stabilizing effect. The addition of dispersants can also accelerate the wetting between the polymer and the pigment, reduce the surface tension between them, increase their affinity, improve the compatibility between the pigment and the carrier resin, and improve the flowability and processing performance of the masterbatch.

[0005] Amphiphilic polymers are commonly used as dispersants in color masterbatches. Amphiphilic copolymers contain molecular segments with significantly different properties (such as hydrophilicity, lipophilicity, and complexing ability), which can increase the compatibility of pigment molecules with large polarity differences with the carrier resin. Current prior art, US8153731, mentions the preparation of comb-like polymers by reacting styrene-maleic anhydride copolymers with primary amino-terminated polyepoxides used as wetting agents and / or dispersants. US4755563 proposes the use of block copolymer dispersants containing ionic moieties, where the block copolymers are prepared via group transfer polymerization and can be used as pigment dispersants. These block copolymers, when used as dispersants, lack long-chain hydrocarbon groups. While they can disperse pigment particles, their steric hindrance effect is not prominent enough, and their improvement on the weather resistance of polyolefin products is limited.

[0006] On the other hand, commercially available compatibilizers PE-g-MAH, PP-g-MAH, and POE-g-MAH are all made by grafting the polar monomer maleic anhydride onto non-polar polyethylene, polypropylene, or ethylene-octene copolymers. However, the polar monomers are unevenly distributed and lack regularly distributed long carbon chains to provide a steric barrier effect to maintain dispersion stability. Even in POE-g-MAH containing long carbon chains, the distribution of lipophilic hydrocarbon groups on the molecular chain is irregular, which reduces the effect on pigments when used as a dispersant in masterbatches and fails to exert the steric barrier effect of the long-chain hydrocarbon groups.

[0007] Therefore, the weather resistance and color difference of polyolefin products prepared by current masterbatches are difficult to meet market demands, and there is an urgent need for polymer dispersants that can increase the compatibility between pigments and carrier resins, as well as masterbatch compositions with better pigment dispersibility and weather resistance. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention designs and synthesizes a copolymer of maleic anhydride and donor vinyl monomers, which alternately forms polar succinic anhydride segments and non-polar hydrocarbon segments. When this copolymer is used as a dispersant in color masterbatch compositions in combination with low molecular weight polyethylene wax, it can more effectively exert a steric barrier effect, improve the dispersion effect on pigment particles, and also have a stronger shielding effect on pigment particles. After aging under ultraviolet light, the polyolefin products exhibit lower color difference.

[0009] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0010] In a first aspect, a polymer, wherein the molecular chain segments of the polymer comprise at least one or a combination of two of the following structures:

[0011] or

[0012] Preferably, the polymer molecular chain segments include the following structures:

[0013] Wherein, n is a positive integer greater than or equal to 1, R1 is a straight-chain alkane with 4 to 18 carbon atoms, and R2 is a straight-chain alkane with 6 to 20 carbon atoms. Preferably, R1 is a straight-chain alkane with 4 to 8 carbon atoms, and R2 is a straight-chain alkane with 10 to 20 carbon atoms.

[0014] Preferably, the polymer comprises at least one or more of the following molecular chain segments:

[0015] Furthermore, the polymer has a weight-average molecular weight of not less than 5000 and a number-average molecular weight of not less than 1500.

[0016] Secondly, the preparation method of the polymer described above includes: free radical polymerization of maleic anhydride and α-olefin dimer to obtain maleic anhydride-α-olefin dimer copolymer; or, reaction of linear alkyl primary amine with maleic anhydride-α-olefin dimer copolymer to obtain N-alkylmaleamide-α-olefin dimer copolymer.

[0017] The free radical polymerization uses an initiator, which includes one or a combination of two of the following: azo initiators or peroxide initiators. Preferably, the azo initiator is selected from azobisisobutyronitrile (AIBN), and the peroxide initiator is selected from benzoyl peroxide (BPO).

[0018] Preferably, the preparation method includes: free radical polymerization of maleic anhydride with 1-hexene (C6) dimer, 1-octene (C8) dimer or 1-decene (C10) dimer.

[0019] Preferably, the preparation method includes reacting 1-octadecylamine with a maleic anhydride-α-olefin dimer copolymer.

[0020] The α-olefin dimer structure is as follows: In this context, a and b are independent of each other and can take the same or different values. The range of values ​​for a and b is 1-17.

[0021] Preferably, the α-olefin dimer is obtained by coordination polymerization of a metallocene catalyst system with one or more linear α-olefins, wherein the linear α-olefin has 6-20 carbon atoms. The metallocene catalyst system comprises at least one metallocene catalyst, which is an inorganic-organic complex containing at least one cyclic ring or cyclic ring derivative as a ligand and at least one group IVB transition element as a central atom. Preferably, the central atom is selected from zirconium (Zr).

[0022] Thirdly, the application of the polymers described above in the preparation of color masterbatches.

[0023] Fourthly, a color masterbatch composition includes: a carrier resin, a pigment, a dispersant, and other additives.

[0024] The dispersant is selected from the above-mentioned polymer and polyethylene wax combination, wherein the polyethylene wax is selected from polyethylene wax with a weight average molecular weight not exceeding 3000 and a polydispersity index not exceeding 1.50; preferably, the polyethylene wax is selected from any one or a combination of two of Baker Hughes' POLYWAX1000 or POLYWAX2000.

[0025] The carrier resin is selected from thermoplastic resins and used as a carrier for pigments. The carrier resin is selected from one or more combinations of homopolymer polyethylene, homopolymer polypropylene, linear low-density polyethylene, metallocene polyethylene, metallocene polypropylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer, ethylene-vinyl acetate copolymer and metallocene polyolefin elastomer.

[0026] The pigments are selected from at least one or more combinations of inorganic and organic pigments. Inorganic pigments are selected from any one or more combinations of: iron oxide red, chrome red, iron oxide yellow, chrome yellow, iron oxide orange, zinc yellow, zinc sulfide, titanium dioxide, zinc white, cobalt blue, iron blue, manganese blue, cobalt green, chromium oxide, cobalt violet, manganese violet, iron oxide black, and carbon black. Organic pigments are selected from any one or more combinations of: aromatic heterocyclic pigments, perylene pigments, monoazo pigments, diazo pigments, azo condensation pigments, diazo condensation pigments, and aminoketone pigments. Preferably, the organic pigments are selected from aromatic heterocyclic pigments, specifically including any one or more combinations of titanium cyanide, benzimidazolinone, quinoline ketone, quinacridone, violet ketone, dioxazine, isoindoline, and indigo thiocyanate. Furthermore, these pigments can be any form of dry powder, a single pigment dispersion prepared according to conventional methods, or a mixed dispersion of multiple pigments.

[0027] Preferably, the pigment is selected from a mixture of inorganic and organic pigments.

[0028] Other additives include one or a combination of two of the following: antioxidants or UV stabilizers. The antioxidants are selected from a combination of antioxidant 1010 and antioxidant 1076, and the UV stabilizers are selected from a combination of light stabilizer 531 and light stabilizer 2908.

[0029] Furthermore, the masterbatch composition described above also includes fillers, wherein the fillers are selected from one or more of heavy calcium carbonate, light calcium carbonate, magnesium carbonate, clay, talc, barium sulfate, calcium sulfate, mica powder, aluminum hydroxide, calcium hydroxide, hydrotalcite, molecular sieve, kaolin, or wollastonite. Adding fillers can enhance the surface hardness of the masterbatch while reducing the production cost of the masterbatch.

[0030] Furthermore, the color masterbatch composition described above comprises, by weight percentage, the following components: 15-30 wt% carrier resin, 55-70 wt% pigment, 5-15 wt% dispersant, and 0.1-1.5 wt% other additives.

[0031] Preferably, the color masterbatch composition described above comprises, by weight percentage, the following components: 20-30 wt% carrier resin, 60-70 wt% pigment, 5-15 wt% dispersant, and 0.1-1.0 wt% other additives.

[0032] Furthermore, the color masterbatch composition described above comprises, by weight percentage, the following components: 15-30 wt% carrier resin, 55-70 wt% pigment, 5-15 wt% dispersant, 1-5 wt% filler, and 0.1-1.5 wt% other additives.

[0033] Fifthly, the preparation method of the above-mentioned masterbatch composition includes: mixing pigments and dispersants and grinding and pulverizing them, then mixing them with carrier resin and other additives, then dispersing them evenly through melt blending, and then granulating, drying and packaging them.

[0034] Preferably, the pigment is mixed with the dispersant and then ground to an average particle size of no more than 10 μm;

[0035] Preferably, the pigment, dispersant, carrier resin and other additives are mixed at a temperature not lower than 100°C and the stirring speed is not lower than 40 r / min;

[0036] Furthermore, the color masterbatch composition is melt-blended using a twin-screw extruder to achieve uniform dispersion. The melt-blending temperature is 150-300℃; preferably, the melt-blending temperature is 180-250℃; more preferably, the melt-blending temperature is 220℃; the screw speed during melt-blending is not less than 200 rpm; preferably, the screw speed during melt-blending is 200-400 rpm; more preferably, the screw speed during melt-blending is 220 rpm.

[0037] Sixthly, a polyolefin product is prepared from the masterbatch composition described above; wherein the polyolefin product includes polyethylene or polypropylene films or injection molded parts.

[0038] The beneficial effects of this invention are as follows: It designs and uses a free radical polymerization method to synthesize alternating copolymers of maleic anhydride and vinyl monomers. Taking advantage of the significant difference in the electronic effects of the two monomers, which makes it easy to form alternating copolymers arranged in a head-to-tail manner during free radical polymerization, a series of alternating polymers are synthesized based on α-olefin dimers using a free radical initiator, including: maleic anhydride-α-olefin dimer copolymer and N-alkylmaleamide-α-olefin dimer copolymer.

[0039] This alternating copolymer features alternating polar succinic anhydride segments and non-polar long-carbon hydrocarbon segments on its main chain. The more uniform and regular distribution of these segments further enhances the polymer's steric hindrance effect and its dispersion and coating of pigments, thereby improving pigment dispersion performance and aging resistance. However, due to the relatively high molecular weight of the copolymer, its use in conjunction with low-molecular-weight polyethylene wax as a dispersant provides both dispersion and lubrication, facilitating more uniform melting and mixing of the masterbatch composition. The resulting polyolefin product exhibits lower color difference, more stable coloring performance, and better UV aging resistance. Furthermore, this route utilizes the light component byproduct α-olefin dimers generated during α-olefin coordination polymerization, thereby expanding the application areas of low-molecular-weight polyα-olefins and increasing their economic value. Attached Figure Description

[0040] Figure 1 The 1H NMR spectrum of 1-hexene (C6) dimer ( 1 H-NMR).

[0041] Figure 2 The 1H NMR spectrum of 1-octene (C8) dimer ( 1 H-NMR).

[0042] Figure 3 The 1H NMR spectrum of 1-decene (C10) dimer ( 1 H-NMR).

[0043] Figure 4 The 1H NMR spectrum of the maleic anhydride-α-olefin dimer copolymer prepared in Example 1 ( 1 H-NMR).

[0044] Figure 5 The 1H NMR spectrum of the N-octadecylmaleamide-α-olefin dimer copolymer prepared in Example 2 ( 1 H-NMR).

[0045] Figure 6 The 1H NMR spectrum of the maleic anhydride-α-olefin dimer copolymer prepared in Example 3 ( 1 H-NMR).

[0046] Figure 7 The 1H NMR spectrum of the N-octadecylmaleamide-α-olefin dimer copolymer prepared in Example 4 ( 1 H-NMR).

[0047] Figure 8 The 1H NMR spectrum of the maleic anhydride-α-olefin dimer copolymer prepared in Example 5 ( 1 H-NMR).

[0048] Figure 9 The 1H NMR spectrum of the N-octadecylmaleamide-α-olefin dimer copolymer prepared in Example 6 ( 1 H-NMR).

[0049] Figure 10 Molecular weight distribution diagrams of maleic anhydride-α-olefin dimer copolymer (a) and N-octadecylmaleamide-α-olefin dimer copolymer (b) prepared from 1-hexene (C6) dimer.

[0050] Figure 11 Molecular weight distribution of maleic anhydride-α-olefin dimer copolymer (c) and N-octadecylmaleamide-α-olefin dimer copolymer (d) prepared from 1-octene (C8) dimer.

[0051] Figure 12 Molecular weight distribution of maleic anhydride-α-olefin dimer copolymer (e) and N-octadecylmaleamide-α-olefin dimer copolymer (f) prepared from 1-decene (C10) dimer.

[0052] Figure 13 The torque-time curves of the masterbatch composition samples prepared in Examples 9, 11, and 17 and Comparative Examples 1 and 2 were tested at 160°C and a screw speed of 80 r / min. Detailed Implementation

[0053] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] Unless otherwise specified, the experimental conditions used in the examples are generally in accordance with conventional conditions in the art or the conditions recommended by the reagent company. Unless otherwise specified, the materials and reagents used in the examples can be purchased commercially.

[0056] Preparation of α-olefin dimers: First, polyα-olefin dimers were obtained through coordination polymerization of linear α-olefins. The polymerization reaction was carried out in a 2000 mL PARR high-pressure stirred reactor. The reactor was first heated to above 100°C and then vacuum-baked for 1 hour, during which time it was purged multiple times with high-purity nitrogen to remove water / oxygen impurities. Subsequently, the reactor temperature was adjusted to 70°C using a jacketed cooling water circulation system. 800 mL of α-olefin was added, and the stirring speed was started at 500 rpm. After stirring for 15 minutes, the main catalyst, a stem-type organometallic compound siloxane-silicon-bridged zirconium dichloride (Accenture Technology), dissolved in 350 mL of n-hexane, was added to the reactor. The corresponding structural formula is: The reaction mixture consisted of a modified methylaluminoxane (MMAO-12, 7 wt% Al content, toluene solvent, Millipore Sigma) and a chain transfer agent, triisobutylaluminum (TIBA, 0.1 mol / L soluble in hexane solvent, Millipore Sigma). The concentration of the metallocene main catalyst in the polymerization system was 0.3 mmol / L (calculated as Zr), the concentration of MMAO-12 in the polymerization system was 30 mmol / L (calculated as Al), and the concentration of TIBA in the polymerization system was 30 mmol / L (calculated as Al). The nitrogen valve was opened to purge nitrogen to a pressure of 0.15 MPa. After 1 hour of reaction, the reaction was stopped. The vent pipe was opened to release the pressure, and the crude product was released from the reactor. 10 mL of acidified ethanol was added to the crude product to terminate the reaction. Then, 3 wt% of activated clay was added to adsorb and remove catalyst residues. The mixture was then filtered under pressure to obtain the filtrate. The filtrate was then subjected to vacuum distillation to separate α-olefin dimers with different carbon numbers.

[0057] Separation conditions for α-olefin dimers: When the α-olefin is 1-hexene (C6), the fraction collected at 70-90℃ under a vacuum of 7 torr is used to separate the C6 dimer; when the α-olefin is 1-octene (C8), the fraction collected at 100-120℃ under a vacuum of 0.8 torr is used to separate the C8 dimer; when the α-olefin is 1-decene (C10), the fraction collected at 110-130℃ under a vacuum of 0.5 torr is used to separate the C10 dimer.

[0058] Example 1

[0059] Synthesis of alternating maleic anhydride-α-olefin dimer copolymer: Maleic anhydride (9.80 g, 0.1 mol), 1-hexene (C6) dimer (16.80 g, 0.1 mol), and mixed xylene (XYL solvent, 30 mL) were mixed in a nitrogen-filled reaction flask, which was then placed in a constant-temperature oil bath. After maintaining the external bath temperature at 110 °C for 10 min, 5 mL of the prepared benzoyl peroxide (BPO) solution in toluene (BPO concentration 0.1 mol / L) was added to the reaction flask and mixed. The reaction was continued at 110 °C for 4 h. Subsequently, the solvent was removed under reduced pressure, and the residue was washed in batches with methanol (3 × 30 mL), filtered, and the filter cake was vacuum dried to obtain 19.9 g of white powder product, which was the alternating maleic anhydride-α-olefin dimer copolymer.

[0060] Example 2

[0061] Synthesis of N-octadecylmaleamide-α-olefin dimer alternating copolymer: 10 g of the product obtained in Example 1 and 28.30 g (0.105 mmol) of 1-octadecylamine were placed in a reaction flask filled with nitrogen and mixed. The reaction mixture was stirred at 130 °C for 10 h, cooled, and then filtered in batches with methanol (3 × 30 mL). The filter cake was vacuum dried to obtain 30.4 g of a light yellow powder product, which was the N-octadecylmaleamide-α-olefin dimer alternating copolymer.

[0062] Example 3

[0063] Synthesis of alternating maleic anhydride-α-olefin dimer copolymer: Maleic anhydride (9.80 g, 0.1 mol), 1-octene (C8) dimer (22.40 g, 0.1 mol), and 50 mL of XYL solvent were mixed in a nitrogen-filled reaction flask, which was then placed in a constant-temperature oil bath. After maintaining the external bath temperature at 110 °C for 10 min, 5 mL of a solution of benzoyl peroxide (BPO) dissolved in toluene (BPO concentration 0.1 mol / L) was added to the reaction flask and mixed. The reaction was continued at 110 °C for 4 h. Subsequently, the solvent was removed under reduced pressure, and the residue was washed in batches with methanol (3 × 30 mL), filtered, and the filter cake was vacuum dried to obtain 27.6 g of a white powder product, which was the alternating maleic anhydride-α-olefin dimer copolymer.

[0064] Example 4

[0065] Synthesis of N-octadecylmaleamide-α-olefin dimer alternating copolymer: 10 g of the product obtained in Example 3 and 28.30 g of 1-octadecylamine (0.105 mmol) were mixed in a nitrogen-filled reaction flask. The reaction mixture was stirred at 135 °C for 12 h, cooled, and then filtered in batches with methanol (3 × 30 mL). The filter cake was vacuum dried to obtain 29.8 g of a light yellow powder, which was the N-octadecylmaleamide-α-olefin dimer alternating copolymer.

[0066] Example 5

[0067] Synthesis of alternating maleic anhydride-α-olefin dimer copolymer: Maleic anhydride (9.80 g, 0.1 mol), 1-decene (C10) dimer (28.00 g, 0.1 mol), and 60 mL of XYL solvent were mixed in a nitrogen-filled reaction flask, which was then placed in a constant-temperature oil bath. After maintaining the external bath temperature at 110 °C for 10 min, 5 mL of a solution of benzoyl peroxide (BPO) dissolved in toluene (BPO concentration 0.1 mol / L) was added to the reaction flask and mixed. The reaction was continued at 110 °C for 4 h. Subsequently, the solvent was removed under reduced pressure, and the residue was washed in batches with methanol (3 × 30 mL), filtered, and the filter cake was vacuum dried to obtain 39.2 g of a white powder product, which was the alternating maleic anhydride-α-olefin dimer copolymer.

[0068] Example 6

[0069] Synthesis of N-octadecylmaleamide-α-olefin dimer alternating copolymer: 10 g of the product obtained in Example 5 and 28.30 g (0.105 mmol) of 1-octadecylamine were placed in a nitrogen-filled reaction flask and mixed. The reaction mixture was stirred at 135 °C for 12 h, cooled, and then filtered in batches with methanol (3 × 30 mL). The filter cake was vacuum dried to obtain 29.1 g of a light yellow powder, which was the N-octadecylmaleamide-α-olefin dimer alternating copolymer.

[0070] Example 7

[0071] The masterbatch formulation is as follows: 15 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 9 wt% maleic anhydride-α-olefin dimer alternating copolymer of Example 1, 2 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0072] Preparation of masterbatch: First, the pigment and dispersant are compounded. Rutile titanium dioxide, pigment yellow 147 and phthalocyanine green are mixed in a mass ratio of 4:1:1 to obtain a composite pigment. The dispersant maleic anhydride-α-olefin dimer alternating copolymer and polyethylene wax POLYWAX2000 are mixed with the composite pigment and then ground with an air jet mill (compressed air pressure 0.7MPa) until the average particle size does not exceed 10μm.

[0073] The above mixture, along with carrier resin, filler, and other additives, was mixed for 20 minutes in a ZJL-200 twin-screw torque rheometer at a screw speed of 80 r / min and a temperature of 160°C. The mixture was then melt-blended using a twin-screw extruder at a temperature of 200°C and a screw speed of 220 rpm. The pigment was evenly dispersed in the carrier resin through shearing and mixing by the screw. The mixture was then granulated, dried, and packaged to obtain the color masterbatch.

[0074] Example 8

[0075] The masterbatch formulation consists of: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% maleic anhydride-α-olefin dimer alternating copolymer from Example 1, 3 wt% POLYWAX1000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0076] The method for preparing the color masterbatch is the same as in Example 7.

[0077] Example 9

[0078] The masterbatch formulation is as follows: 16 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 7 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer of Example 2, 2 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 62 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 3 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1). The masterbatch preparation method is the same as in Example 7.

[0079] Example 10

[0080] The masterbatch formulation consists of: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer from Example 2, 3 wt% POLYWAX1000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0081] The preparation method of the color masterbatch is the same as in Example 7.

[0082] Example 11

[0083] The masterbatch formulation is as follows: 15 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 9 wt% alternating copolymer of maleic anhydride-α-olefin dimer from Example 3, 2 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1). The masterbatch preparation method is the same as in Example 7.

[0084] Example 12

[0085] The masterbatch formulation consists of: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% maleic anhydride-α-olefin dimer alternating copolymer of Example 3, 3 wt% POLYWAX1000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0086] The preparation method of the color masterbatch is the same as in Example 7.

[0087] Example 13

[0088] The masterbatch formulation is as follows: 16 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 7 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer of Example 4, 2 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 62 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 3 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1). The masterbatch preparation method is the same as in Example 7.

[0089] Example 14

[0090] The masterbatch formulation consists of: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer of Example 4, 3 wt% POLYWAX1000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0091] The preparation method of the color masterbatch is the same as in Example 7.

[0092] Example 15

[0093] The masterbatch formulation is as follows: 15 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 9 wt% alternating copolymer of maleic anhydride-α-olefin dimer from Example 5, 2 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1). The masterbatch preparation method is the same as in Example 7.

[0094] Example 16

[0095] The masterbatch formulation consists of: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% maleic anhydride-α-olefin dimer alternating copolymer of Example 5, 3 wt% POLYWAX1000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0096] The preparation method of the color masterbatch is the same as in Example 7.

[0097] Example 17

[0098] The masterbatch formulation is as follows: 16 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 7 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer of Example 6, 2 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 62 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 3 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1). The masterbatch preparation method is the same as in Example 7.

[0099] Example 18

[0100] The masterbatch formulation consists of: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer of Example 6, 3 wt% POLYWAX1000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0101] The preparation method of the color masterbatch is the same as in Example 7.

[0102] Comparative Example 1

[0103] The masterbatch formulation consists of: 16wt% linear low-density polyethylene (LLDPE) with an MI of 50g / 10min, 9wt% metallocene polyethylene (m-PE) with an MI of 30g / 10min, 9wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 62wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 3wt% talc, 0.5wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0104] The preparation method of the color masterbatch is the same as in Example 7.

[0105] Comparative Example 2

[0106] The masterbatch formulation consists of: 16 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 9 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 9 wt% N-octadecyl maleamide-α-olefin dimer alternating copolymer of Example 4, 62 wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 3 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0107] The preparation method of the color masterbatch is the same as in Example 7.

[0108] Comparative Example 3

[0109] The masterbatch formulation consists of: 16wt% linear low-density polyethylene (LLDPE) with an MI of 50g / 10min, 9wt% metallocene polyethylene (m-PE) with an MI of 30g / 10min, 7wt% FB521 type polyolefin elastomer grafted maleic anhydride (POE-g-MAH) copolymer (Jia Yi Rong Polymer), 2wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 62wt% composite pigment (rutile titanium dioxide, pigment yellow 147, and phthalocyanine green in a mass ratio of 4:1:1), 3wt% talc, 0.5wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1).

[0110] The preparation method of the color masterbatch is the same as in Example 7.

[0111] Comparative Example 4

[0112] The masterbatch formulation is as follows: 8 wt% linear low-density polyethylene (LLDPE) with an MI of 50 g / 10 min, 16 wt% metallocene polyethylene (m-PE) with an MI of 30 g / 10 min, 8 wt% CMG9801 type polypropylene grafted maleic anhydride (PP-g-MAH) copolymer (Jiayirong Polymer), 3 wt% POLYWAX2000 (Baker Hughes) polyethylene wax, 60 wt% composite pigment (rutile titanium dioxide and iron oxide yellow in a mass ratio of 85:15), 4 wt% talc, 0.5 wt% UV stabilizer (light stabilizer 531 and light stabilizer 2908 in a mass ratio of 3:1), and 0.5 wt% antioxidant (antioxidant 1010 and antioxidant 1076 in a mass ratio of 3:1). The masterbatch preparation method is the same as in Example 7.

[0113] In the above embodiments or comparative examples, the polyethylene wax used was Baker Hughes' POLYWAX 1000 or POLYWAX 2000, and the corresponding molecular weights and properties are shown in Table 1. As can be seen from the data in Table 1, the weight-average molecular weight of the polyethylene wax does not exceed 3000, the molecular weight distribution is very narrow (not exceeding 1.40), and its melting point is greater than 110°C, classifying it as a hard wax.

[0114] Table 1

[0115] <![CDATA[M w ]]> <![CDATA[M n ]]> <![CDATA[PD(M w / M n )]]> Penetration (dmm) Melting point (°C) POLYWAX1000 1190 848 1.40 1.0 113 POLYWAX2000 2536 1890 1.34 0.5 126

[0116] Characterization of the polymers (maleic anhydride-α-olefin dimer alternating copolymers or N-octadecylmaleamide-α-olefin dimer alternating copolymers) prepared in Examples 1-6 included: elemental analysis (C, H, N, O) performed on a PerkinElmer Series II CHNS / O Analyzer 2400. Gel permeation chromatography (GPC) was performed using an Agilent PLGPC 220 chromatograph equipped with a PLgel Olexis column, with tetrahydrofuran containing 5% acetic acid as the eluent (flow rate 1 mL / min), at a test temperature of 40 °C, using polystyrene as the molecular weight calibration standard. Structural characterization of the copolymer samples was performed using a Bruker Avance 800 MHz nuclear magnetic resonance spectrometer with 1H NMR spectroscopy. 1 ¹H-NMR was performed using CDCl₃ as the solvent. The elemental analysis results are shown in Table 2. 1 The H-NMR results are attached to the instruction manual. Figure 1-9 The GPC test results are attached to the instruction manual. Figure 10-12 .

[0117] Table 2

[0118]

[0119] The data in Table 2 is consistent with the instructions attached. Figure 1-12 It can be seen that the polymers prepared in Examples 1, 3, and 5 contain C, H, and O elements, and have a molecular weight M. w The molecular weight ranges from 5,000 to 50,000. The molecular weight is related to the number of carbon atoms in the α-olefin dimer used. The higher the number of carbon atoms in the α-olefin dimer, the higher the molecular weight of the polymer prepared.

[0120] Examples 2, 4, and 6 are based on Examples 1, 3, and 5, respectively, by adding 1-octadecylamine and maleic anhydride to carry out a ring-opening reaction, thereby increasing the number-average molecular weight and weight-average molecular weight of the polymer, and introducing nitrogen element into the polymer.

[0121] The tests on the masterbatch composition samples prepared in Examples 7-18 and Comparative Examples 1-3 included:

[0122] Dispersibility test of masterbatch in polyolefin: The prepared masterbatch was added to polypropylene, and a sample with a thickness of 2.5 mm was obtained by injection molding. The sample was then calendered at 200℃ to obtain a polypropylene film. The size of the pigment particles was observed, and the number of pigment particles with diameters of 5 μm, 10 μm, 30 μm and above 100 μm was counted. The dispersibility was rated accordingly. The specific rating indicators are shown in Table 3.

[0123] Table 3

[0124] grade 5 4 3 2 1 Average particle size of pigment ions / μm ＜5 5-10 10-30 30-100 ＞100

[0125] Total color difference test: Referring to the method of Q / SYRD-R-2014-2014 polyolefin masterbatch standard, the masterbatch and polypropylene granules were mixed at a mass ratio of 1:8, and after blending, they were injection molded into test strips at 200℃. The test strips and standard samples were measured by an LS173 (Shenzhen Linshang Technology Co., Ltd.) colorimeter under a D65 light source, and ΔL, Δa and Δb were obtained. ΔE was then calculated according to formula (1).

[0126]

[0127] Weather resistance test: The test strips obtained by injection molding at 200℃ are placed in a UV aging test chamber and aged for 1000h under the same conditions. After being taken out, ΔL, Δa and Δb are tested according to the total color difference test method, and the total color difference ΔE after aging is calculated. The weather resistance of the masterbatch is judged by the value of the total color difference ΔE after aging. The ΔE value is used to evaluate the consistency and matching degree of color.

[0128] Balance Torque Test: During the preparation of the masterbatch, the well-mixed dispersant, pigment, carrier resin, filler, and other additives are further mixed. A torque rheometer is then used to test the torque-time curve of the corresponding sample at 160℃ and a screw speed of 80 r / min (see attached figure). Figure 13 From this, we can derive the balanced torque and the time to reach the maximum torque.

[0129] The test results of the masterbatch composition samples prepared in Examples 7-18 and Comparative Examples 1-3 are listed in Table 4.

[0130] Table 4

[0131]

[0132]

[0133] As shown in Table 4, the masterbatches prepared using the alternating maleic anhydride-α-olefin dimer copolymers or N-octadecylmaleamide-α-olefin dimer copolymers prepared in Examples 1-6 in Examples 7-18 exhibit better dispersibility. The pigment particles in the polypropylene films prepared by calendering are smaller, and the total color difference in the polypropylene test plates obtained by injection molding is smaller. Even after 1000 hours of aging, the total color difference remains smaller, indicating higher aging resistance. The torque-time curves and equilibrium torque obtained from the material melt blending in a torque rheometer show that the formulations in Examples 7-18 have lower equilibrium torques during the material blending process. This indicates that adding the polymers prepared in Examples 1-6 helps improve the compatibility between the pigment particles and the organic components in the formulation, significantly increasing the interfacial bonding between the two.

[0134] In addition, analysis of the data in Table 4 revealed that alternating copolymers prepared using α-olefin dimers with a higher carbon chain number exhibited better dispersion and compatibility, resulting in lower color difference and higher aging resistance in the prepared polyolefin products. Analysis of Examples 7-10, 11-14, and 15-18, which had the same carbon number, showed that the N-octadecylmaleamide-α-olefin dimer copolymer prepared by further reacting 1-octadecylamine with maleic anhydride provided better dispersion and coating protection for pigment particles in the masterbatch composition, resulting in lower color difference and better aging resistance in the corresponding polyolefin products.

[0135] The masterbatch composition formulation proposed in Comparative Example 1 did not add maleic anhydride-α-olefin dimer copolymer or N-octadecyl maleamide-α-olefin dimer copolymer, and used only low molecular weight POLYWAX2000 polyethylene wax as a dispersant. Therefore, the dispersion effect on pigment particles was poor. Its molecular weight was low and it lacked non-polar long side chains to disperse and coat the pigment particles. The polypropylene sample prepared subsequently had large color difference and poor aging resistance. The equilibrium torque during the material mixing process was higher, indicating that the compatibility between the components was poor and it was more difficult to mix them.

[0136] The masterbatch composition formulation of Comparative Example 2 was dispersed solely using the alternating maleic anhydride-α-olefin dimer copolymer prepared in Example 3, without the addition of low molecular weight polyethylene wax POLYWAX1000 or POLYWAX2000, as shown in the accompanying drawings. Figure 11 (c) Based on the GPC results, the molecular weight M of the alternating copolymer prepared in Example 3 is... w =10821,M n =5665, PD=1.91, which indicates that the alternating copolymer has a high molecular weight and lacks low molecular weight components during dispersion, resulting in a relatively low dispersibility grade. The equilibrium torque in the material mixing process of the color masterbatch composition is high, and the corresponding polypropylene sample has a large color difference and poor aging resistance.

[0137] Comparative Examples 3 and 4 used commercially available grafted polymers POE-g-MAH and PP-g-MAH, respectively, along with low molecular weight polyethylene wax as dispersants in the masterbatch compositions. The dispersion effect on pigment particles was still lower than in Examples 7-18, and the color difference of the prepared polypropylene samples and the color difference after aging were higher than in Examples 7-18. This is because POE-g-MAH and PP-g-MAH are graft copolymers, and the grafting sites of MAH are random and without obvious pattern. The low-polarity carbon skeleton and the high-polarity maleic anhydride monomer are unevenly distributed. Furthermore, POE is a copolymer of ethylene and α-olefins. Compared with the alternating copolymers prepared in Examples 1-6, the distribution of α-olefins in the molecular chain of POE-g-MAH is not uniform. Therefore, the steric hindrance effect of the long carbon chain is difficult to effectively exert, thus affecting the dispersion effect on pigment particles. PP-g-MAH uses maleic anhydride grafted onto polypropylene, and the carbon chain of the PP segment is too short, also resulting in the problem of insufficient steric hindrance effect.

[0138] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Although the specific embodiments of the present invention have been described above, they are not intended to limit the protection scope of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A color masterbatch composition, characterized in that, The masterbatch composition includes: carrier resin, pigment, dispersant, and other additives; The dispersant is selected from a combination of polymer A and polyethylene wax, wherein the polyethylene wax is selected from polyethylene wax with a weight-average molecular weight not exceeding 3000 and a polydispersity index not exceeding 1.

50. The molecular chain segments of polymer A include the following structures: ； Where n is a positive integer greater than or equal to 1, R1 is a straight-chain alkane with 4 to 18 carbon atoms, and R2 is a straight-chain alkane with 6 to 20 carbon atoms. Polymer A has a weight-average molecular weight of not less than 5000 and a number-average molecular weight of not less than 1500. The preparation method of the polymer A includes: free radical polymerization of maleic anhydride and α-olefin dimer to obtain maleic anhydride-α-olefin dimer copolymer; and reaction of linear alkyl primary amine with maleic anhydride-α-olefin dimer copolymer to obtain N-alkylmaleamide-α-olefin dimer copolymer. The carrier resin is selected from thermoplastic resins and used as a carrier for pigments. The carrier resin is selected from one or more combinations of homopolymer polyethylene, homopolymer polypropylene, linear low-density polyethylene, metallocene polyethylene, metallocene polypropylene, ethylene-propylene random copolymer, ethylene-propylene block copolymer, ethylene-vinyl acetate copolymer and metallocene polyolefin elastomer. The pigments are selected from at least one or more combinations of inorganic pigments and organic pigments. The inorganic pigments are selected from any one or more combinations of: iron oxide red, chrome red, iron oxide yellow, chrome yellow, iron oxide orange, zinc yellow, zinc sulfide, titanium dioxide, zinc white, cobalt blue, iron blue, manganese blue, cobalt green, chromium oxide, cobalt violet, manganese violet, iron oxide black, and carbon black. The organic pigments are selected from any one or more combinations of: aromatic heterocyclic pigments, perylene pigments, monoazo pigments, diazo pigments, azo condensation pigments, diazo condensation pigments, and amino ketone pigments. Other additives include one or a combination of two of antioxidants or UV stabilizers, wherein the antioxidants are selected from a combination of antioxidant 1010 and antioxidant 1076, and the UV stabilizers are selected from a combination of light stabilizer 531 and light stabilizer 2908. The color masterbatch composition comprises, by weight percentage, the following components: 15-30 wt% carrier resin, 55-70 wt% pigment, 5-15 wt% dispersant, and 0.1-1.5 wt% other additives.

2. The color masterbatch composition according to claim 1, characterized in that, The free radical polymerization uses an initiator, which includes one or a combination of two of the following: azo initiators or peroxide initiators.

3. The color masterbatch composition according to claim 1, characterized in that, The structure of the α-olefin dimer is as follows: , where a and b are independent of each other and can take the same or different values. The range of values ​​for a and b is 1-17.

4. The color masterbatch composition according to claim 3, characterized in that, The α-olefin dimer is obtained by coordination polymerization of a metallocene catalyst system with one or more linear α-olefins, wherein the number of carbon atoms in the linear α-olefin ranges from 6 to 20; wherein the metallocene catalyst system includes at least one metallocene catalyst, which is an inorganic-organic complex containing at least one cyclopentadienyl ring as a ligand and at least one group IVB transition element as a central atom.

5. The color masterbatch composition according to claim 1, characterized in that, The pigment is selected from a mixture of inorganic and organic pigments.

6. The color masterbatch composition according to claim 1, characterized in that, The color masterbatch composition also includes fillers, wherein, The filler is selected from one or more of the following: heavy calcium carbonate, light calcium carbonate, magnesium carbonate, clay, talc, barium sulfate, calcium sulfate, mica powder, aluminum hydroxide, calcium hydroxide, hydrotalcite, molecular sieve, kaolin, or wollastonite.

7. A method for preparing the color masterbatch composition according to any one of claims 1-6, characterized in that, The preparation method includes: mixing pigments and dispersants and grinding and pulverizing them, then mixing them with carrier resin and other additives, then dispersing them evenly through melt blending, and then granulating, drying and packaging them.

8. The method for preparing the masterbatch composition according to claim 7, characterized in that, The pigment and dispersant are mixed and ground to an average particle size of no more than 10 μm.

9. The method for preparing the masterbatch composition according to claim 7, characterized in that, The color masterbatch composition is melt-blended using a twin-screw extruder to ensure uniform dispersion. The melt-blending temperature is 150-300℃, and the screw speed during melt-blending is not less than 200 rpm.

10. A polyolefin product, characterized in that, The polyolefin product is prepared from the color masterbatch composition according to any one of claims 1-6; wherein the polyolefin product includes polyethylene or polypropylene films or injection molded parts.

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