CN116855060A - High Wen Ya light-resistant black master batch and preparation method thereof - Google Patents

High Wen Ya light-resistant black master batch and preparation method thereof Download PDF

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CN116855060A
CN116855060A CN202311057425.1A CN202311057425A CN116855060A CN 116855060 A CN116855060 A CN 116855060A CN 202311057425 A CN202311057425 A CN 202311057425A CN 116855060 A CN116855060 A CN 116855060A
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parts
weight
master batch
light
matte
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范嘉骏
范金伟
方栋
舒梁军
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Hangzhou Kejia New Materials Co ltd
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Hangzhou Kejia New Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08J2423/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2433/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/18—Homopolymers or copolymers of nitriles
    • C08J2433/20—Homopolymers or copolymers of acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides

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  • Health & Medical Sciences (AREA)
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  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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Abstract

The invention discloses a high Wen Ya light-resistant black master batch and a preparation method thereof, wherein the Gao Wenya light-resistant black master batch comprises the following raw materials in parts by weight: 30-90 parts by weight of polycarbonate; 10-40 parts by weight of high-pigment carbon black; 0.2-4 parts by weight of N, N' -ethylene bis stearamide; 1-9 parts by weight of organic matte agent. The Gao Wenya light-resistant black master batch has excellent and uniform matte effect, can maintain good performance under high temperature conditions, and has stability and durability. The master batch has wide application potential in various plastic products requiring matte and high temperature resistance, such as automobile interior and exterior trim parts, shells of electronic equipment, plastic materials for buildings and the like.

Description

High Wen Ya light-resistant black master batch and preparation method thereof
Technical Field
The invention relates to a masterbatch, in particular to a high Wen Ya light-resistant black masterbatch and a preparation method thereof.
Background
Plastic articles are widely used in a variety of fields including packaging, automobiles, electronics, construction, and textiles. These applications require plastic articles that not only have excellent mechanical properties such as tensile strength, flexural strength and flexural modulus, but also have excellent optical properties. Among the many optical performance indices, the importance of gloss is not negligible, and is an important measure of the appearance effect of plastic articles. Too high a gloss may impair the visual effect of the product, thereby reducing the commercial value of the product. Therefore, in the development stage of plastic products, the control of the glossiness becomes an important task.
Currently, a common method for reducing the gloss of plastic products is to add a matting agent. The matte agent has the main functions of increasing the roughness of the surface of the material, strengthening the scattering of light and reducing reflection, thereby achieving the effect of reducing glossiness. However, the currently used matte agents generally have the problems of poor compatibility, easy aggregation, uneven distribution and the like, and the problems may affect the homogeneity and stability of the matte effect, so that the wide application of the matte agents is limited.
In the field of practical application of plastic products, the market demand for matt black plastic products is increasing. The matte black plastic product not only has a high-grade and fashionable feel, but also can effectively hide surface defects, fingerprints and other marks, and has excellent application potential. However, during the production of matt black plastic articles, we are faced with some challenges.
Conventional black plastic articles are prepared primarily by adding carbon black additives. Polycarbonate (PC) plastic is widely applied as engineering plastic in the fields of electronics, automobiles, aerospace and the like, and has excellent mechanical properties and thermal stability. However, the carbon black additives currently used have some problems in PC plastics. First, conventional carbon black additives may negatively impact the mechanical properties and thermal stability of PC plastics. Secondly, carbon black additives tend to accumulate and agglomerate during the preparation process, resulting in poor homogeneity of the masterbatch. In addition, the existing preparation method is high in cost and complex in process, and the large-scale production of the matte black plastic product is limited.
Disclosure of Invention
In order to solve the technical defects, the invention provides a novel Gao Wenya-resistant black master batch and a preparation method thereof, and aims to provide a black master batch with good matte performance through carefully selecting a matte agent.
In order to achieve the above object, the present invention adopts the following technical scheme:
the invention provides a high Wen Ya light-resistant black master batch which comprises polycarbonate, high pigment carbon black, N' -ethylene bis stearamide and a matte agent, wherein the matte agent is an organic type matte agent.
Polycarbonate (Polycarbonate), a commonly used high performance thermoplastic, has excellent transparency, mechanical properties and heat resistance. In the present invention, the main function of the polycarbonate is to provide the required mechanical properties and heat resistance as a substrate, so that the master batch can be kept stable in a high temperature environment.
High pigment carbon black (High Pigment Carbon Black), a commonly used color agent, has strong light absorption and color development properties. High pigment carbon blacks have higher chroma and color saturation than conventional carbon blacks. In this invention, the main function of the high pigment carbon black is to provide a black color, so that the produced plastic product exhibits a good black effect.
N, N '-ethylene bis stearamide (N, N' -Ethylene Bis Stearamide), which is a commonly used lubricant and antistatic agent, improves the flowability and antistatic properties of plastics. In this invention, the main function of the EBS is to enhance the processability of the plastic, making it easier to plastic form.
The main function of the matte agent is to change the surface glossiness of the plastic, so that the plastic has a matte effect. These matting agents form complex microstructures in the substrate that enhance light scattering and reduce gloss.
The four components cooperate to ensure that the high Wen Ya light-resistant black master batch has excellent matte effect, black effect, mechanical property, heat resistance and processability, so that the high Wen Ya light-resistant black master batch has wide application potential in the production of plastic products.
Preferably, the organic type matting agent is at least one of acrylonitrile-styrene copolymer, crosslinked methyl methacrylate polymer and poly 4-methyl-1-pentene.
The matte agent is widely applied to plastics and is used for changing the surface glossiness of plastic products so as to meet different aesthetic and functional requirements. Specific types of matting agents:
(1) Organic type matte agent: including silicone polymers, various ethylene copolymers (e.g., ethylene propylene copolymers, ethylene butene copolymers, etc.), acrylonitrile-styrene copolymers, crosslinked methyl methacrylate polymers, poly 4-methyl-1-pentene, and the like. These organic type matting agents can form fine particles, scatter light, and thereby produce a matting effect.
(2) Inorganic matte agent: including magnesium oxide, calcium oxide, ferric oxide, and the like. The inorganic matte agent mainly generates a matte effect by forming rough particles on the surface of plastic and scattering light.
However, inorganic matting agents have the following problems:
(1) Compatibility problem: the inorganic matte agent has poor dispersibility in PC plastic, can cause the aggregation of the matte agent, and influences the uniformity of the matte effect and the performance of the whole plastic product.
(2) Influence the mechanical properties: inorganic matt agents can reduce the mechanical properties of PC plastics, such as tensile strength, impact strength, etc., since hard inorganic fillers can interfere with the movement of the polymer chains, reducing their toughness.
Therefore, the inventors repeatedly thought to decide to eliminate inorganic type matting agents from the formulation, and only use organic type matting agents.
Preferably, the organic type matting agent is at least two of acrylonitrile-styrene copolymer, crosslinked methyl methacrylate polymer and poly 4-methyl-1-pentene.
Preferably, the organic type matting agent is a combination of an acrylonitrile-styrene copolymer and a crosslinked methyl methacrylate polymer.
Preferably, the organic type matting agent is a combination of a crosslinked methyl methacrylate polymer and poly 4-methyl-1-pentene.
Preferably, the organic type matting agent is a combination of acrylonitrile-styrene copolymer and poly 4-methyl-1-pentene. The mass ratio of the acrylonitrile-styrene copolymer to the poly 4-methyl-1-pentene is 1: (0.3-3).
Preferably, the high Wen Ya light-resistant black master batch comprises the following raw materials in parts by weight:
30-90 parts by weight of polycarbonate;
10-40 parts by weight of high-pigment carbon black;
0.2-4 parts by weight of N, N' -ethylene bis stearamide;
1-9 parts of matte agent.
Preferably, the high Wen Ya light-resistant black master batch comprises the following raw materials in parts by weight:
40-80 parts by weight of polycarbonate;
15-35 parts by weight of high-pigment carbon black;
0.3-3 parts by weight of N, N' -ethylene bis stearamide;
2-8 parts of matte agent.
Preferably, the high Wen Ya light-resistant black master batch comprises the following raw materials in parts by weight:
50-70 parts by weight of polycarbonate;
20-30 parts by weight of high-pigment carbon black;
0.5-2 parts by weight of N, N' -ethylene bis stearamide;
4-6 parts of matte agent.
Preferably, the high Wen Ya light-resistant black master batch comprises the following raw materials in parts by weight:
60 parts by weight of polycarbonate;
25 parts by weight of high-pigment carbon black;
1 part by weight of N, N' -ethylene bis stearamide;
5 parts of matte agent.
The invention also provides a preparation method of the high Wen Ya light-resistant black master batch, which comprises the following steps: mixing polycarbonate, high pigment carbon black, N' -ethylene bis stearamide and a matte agent, melt blending and granulating.
The formulation is suitable for processing various products of polycarbonate plastics. According to the product requirements, the addition amount of the Gao Wenya light-resistant black master batch is 1-4wt% according to the invention. When in use, the Gao Wenya light-resistant black master batch is directly added into the resin raw material and stirred uniformly. The storage conditions of the product are recommended to be dry, cool and ventilated. The packaging specification is 25 kg per bag, and the bag is used for packaging.
The Gao Wenya light-resistant black master batch has excellent and uniform matte effect, can maintain good performance under high temperature conditions, and has stability and durability. The master batch has wide application potential in various plastic products requiring matte and high temperature resistance, such as automobile interior and exterior trim parts, shells of electronic equipment, plastic materials for buildings and the like.
Detailed Description
The high Wen Ya light-resistant black master batch comprises the following raw materials in parts by weight:
50-70 parts by weight of polycarbonate;
20-30 parts by weight of high-pigment carbon black;
0.5-2 parts by weight of N, N' -ethylene bis stearamide;
4-6 parts of matte agent;
the matte agent is at least one of acrylonitrile-styrene copolymer, cross-linked methyl methacrylate polymer and poly-4-methyl-1-pentene.
The acrylonitrile-styrene copolymer is composed of acrylonitrile (formula C 3 H 3 N) and styrene (formula C 8 H 8 ) The copolymer produced by the copolymerization reaction contains acrylonitrile units and styrene units. The two units are staggered, and the formed polymer has a certain structural rule. The particular properties of acrylonitrile-styrene copolymers are mainly derived from their peculiaritiesAnd a crosslinked structure which enhances the thermal stability, chemical stability and mechanical properties of the polymer. Wherein, acrylonitrile and styrene unit can form microscopic irregular structure, and the irregular structure can effectively scatter light rays incident on the surface of plastic, thus having remarkable matte effect. In polycarbonate plastics rich in carbon black, carbon black itself has good light absorption, and can reduce the surface glossiness of the plastics. Further, the acrylonitrile-styrene copolymer is used as a matte agent, and the matte effect can be further improved due to the microscopic irregular structure of the acrylonitrile-styrene copolymer. In addition, the acrylonitrile-styrene copolymer has good compatibility with the plastic base material, so that the matte effect of the surface of the acrylonitrile-styrene copolymer can be improved while the original material performance is maintained.
The cross-linked methyl methacrylate polymer is a polymer formed by polymerization of methyl methacrylate monomers, and then a three-dimensional network structure formed by cross-linking reaction. The chemical formula of the crosslinked polymer is represented by (C 10 H 14 O 4 .C 5 H 8 O 2 ) X Wherein X represents the degree of polymerization thereof, i.e., the number of repeating units. The mechanism of the crosslinked methyl methacrylate polymer as an organic matting agent is its special microstructure. The particles in the crosslinked network thereof are dispersed in the polycarbonate plastic to form a large number of tiny irregular surfaces. When light irradiates on the tiny irregular surfaces, the light is scattered in different directions, so that the plastic surface presents a matte effect, and the plastic surface looks more 'matte' or 'matt'. In polycarbonate plastics containing a relatively large amount of carbon black, the carbon black has excellent light absorptivity, and can further reduce the surface gloss of the plastics. And after the cross-linked methyl methacrylate polymer is added, the matte effect of the carbon black can be improved due to the scattering effect of the particles, so that the polycarbonate plastic has lower glossiness and better matte effect. Thus, the crosslinked methyl methacrylate polymer is a highly effective organic matting agent suitable for polycarbonate plastics containing relatively large amounts of carbon black.
Poly 4-methyl-1-pentene (Poly (4-methyl-1-pentene) or PMP) is a polymer with unique properties, in which each repeating unit comprises a backbone of 5 carbons and a methyl group. For matte applications, poly-4-methyl-1-pentene primarily takes advantage of its unique optical properties. This has a significant matte effect because it has a low refractive index (about 1.46), which makes it possible to effectively scatter incident light, reducing reflection from the plastic surface. The matte effect of poly-4-methyl-1-pentene is more pronounced when used in polycarbonate plastics containing relatively large amounts of carbon black. Carbon black itself is an excellent light absorber that reduces the brightness of plastic surfaces. The addition of the poly 4-methyl-1-pentene can further scatter light due to the low refractive index characteristic of the poly 4-methyl-1-pentene, and the roughness of the plastic surface is increased, so that the matte effect is further enhanced.
Another inventive concept of the present invention is: the acrylonitrile-styrene copolymer and the poly 4-methyl-1-pentene are used together as a matte agent to improve the optical properties of the plastic product. The two kinds of matting agents have unique advantages and can cooperate with each other to improve the matting effect. Specifically, the acrylonitrile portion of the acrylonitrile-styrene copolymer contains polar cyano groups, which can enhance compatibility with the substrate, facilitate dispersion of the matting agent in the substrate, and ensure uniform matting effect throughout the substrate. While the styrene portion provides rigidity and planarity, it may help to form a rough surface on a microscopic scale to enhance light scattering. Poly 4-methyl-1-pentene is a non-polar polyolefin polymer, has weak intermolecular acting force, and can form uneven microscopic particles or phases in a plastic substrate, thereby forming a rough surface and enhancing light scattering. When the two matte agents are used together, a synergistic effect can be generated, and the non-polar characteristics of the acrylonitrile part of the acrylonitrile-styrene copolymer and the poly 4-methyl-1-pentene form a special microstructure under the interaction, so that the structure is more favorable for light scattering, and a better matte effect is realized.
In the following examples:
polycarbonate, injection molding grade PC, japanese imperial Co., ltd., grade SP-1516, melt flow rate: 31g/10min.
The high pigment carbon black is selected from the high pigment carbon black with the model number of K102 provided by Hebei ink Yu chemical industry Co.
N, N '-ethylene bis-stearamide, N' -ethylene bis-stearamide available from Wu Hanhua Xiang Corp. Of clean Biotechnology, CAS number: 110-30-5.
Acrylonitrile-styrene copolymer, acrylonitrile-styrene copolymer BMAT, CAS number of kogaku Chemtura: 9003-54-7.
Crosslinked methyl methacrylate polymer, CAS number: 25777-71-3.
Poly 4-methyl-1-pentene, poly (4-methyl-1-pentene), CAS number: 25068-26-2.
Example 1
The high Wen Ya light-resistant black master batch comprises the following raw materials in parts by weight:
60 parts by weight of polycarbonate;
25 parts by weight of high-pigment carbon black;
1 part by weight of N, N' -ethylene bis stearamide;
5 parts of matte agent;
the matte agent is an acrylonitrile-styrene copolymer.
The preparation method of the Gao Wenya light-resistant black master batch comprises the following steps:
step 1: pretreatment of
Firstly, the raw materials of polycarbonate, high pigment carbon black, N' -ethylene bis stearamide, a matte agent and the like are thoroughly dried, so that the influence of moisture on the performance of the final product is avoided.
Step 2: mixing
The polycarbonate, the high pigment carbon black, the N, N' -ethylene bis stearamide and the matte agent are placed into a mixing device for mixing so as to ensure that all the raw materials are uniformly mixed.
Step 3: melt blending
And (3) carrying out melt blending on the mixed materials through a double-screw extruder. The temperature and the screw rotation speed should be controlled during the extrusion process to prevent the material from degrading and ensure the uniformity of the master batch.
Step 4: granulating
And (3) extruding the melted and blended material through a die panel, and cooling and granulating to obtain Gao Wenya-light-resistant black master batch.
Step 5: post-treatment
Checking product quality, such as color, matte effect, etc., packaging and storing.
Example 2
The differences from example 1 are: the matte agent is a cross-linked methyl methacrylate polymer.
Example 3
The differences from example 1 are: the matte agent is poly-4-methyl-1-pentene.
Example 4
The differences from example 1 are: the matte agent is prepared by mixing a cross-linked methyl methacrylate polymer and poly 4-methyl-1-pentene according to a mass ratio of 1:1.
Example 5
The differences from example 1 are: the matte agent is prepared by mixing a cross-linked methyl methacrylate polymer and an acrylonitrile-styrene copolymer according to a mass ratio of 1:1.
Example 6
The differences from example 1 are: the matte agent is prepared by mixing an acrylonitrile-styrene copolymer and poly 4-methyl-1-pentene according to a mass ratio of 1:1.
Comparative example 1
A black master batch consists of the following raw materials in parts by weight:
60 parts by weight of polycarbonate;
25 parts by weight of high-pigment carbon black;
1 part by weight of N, N' -ethylene bis stearamide;
drying raw materials of polycarbonate, high pigment carbon black and N, N' -ethylene bis stearamide, mixing in a mixing device, carrying out melt blending by a double-screw extruder, and carrying out cooling granulation to obtain black master batch.
Test example 1
The black master batches of examples and comparative examples were each prepared as a 10mm by 3mm plastic panel. Gloss (60 ° angle) testing was performed using a konica meidax Multi Gloss 268A Gloss meter according to standard ASTM D2457-2003 plastic film and standard test method Standard Test Method for Specular Gloss of Plastic Films and Solid Plastics for solid plastic specular Gloss.
Table 1: gloss test meter
Gloss/60 angle
Example 1 12.4
Example 2 16.2
Example 3 6.6
Example 4 11.8
Example 5 14.6
Example 6 3.8
Comparative example 1 38.0
Example 1 (matting agent is an acrylonitrile-styrene copolymer): the gloss was reduced to 12.4, which is significantly lower than 38.0 of comparative example 1, where no matting agent was added.
Example 2 (matte agent is a crosslinked methyl methacrylate polymer): the gloss was reduced to 16.2, although slightly higher than that of example 1, but still much lower than that of comparative example 1.
Example 3 (matting agent is poly 4-methyl-1-pentene): the gloss was reduced to 6.6, which is also a relatively low value compared to examples 1 and 2 for other single matte agents, indicating that the use of poly-4-methyl-1-pentene as a single matte agent is better.
Example 4 (matting agent is a crosslinked methyl methacrylate polymer and poly 4-methyl-1-pentene): the gloss was reduced to 11.8; example 5 (matting agent is a crosslinked methyl methacrylate polymer and acrylonitrile-styrene copolymer): the gloss was reduced to 14.6. Both examples 4 and 5 were used with two different matting agents, however their gloss results indicate that neither of these two mixing schemes achieved an effect that exceeded that of the respective matting agents used alone. This shows that in both examples, the two matting agents do not exhibit a significant synergistic effect nor produce a counteracting effect, but rather the respective matting effects add.
Example 6 (matting agent is an acrylonitrile-styrene copolymer and poly 4-methyl-1-pentene): the gloss was reduced to 3.8, which is the lowest gloss in all examples, showing the best matte effect, indicating that the use of a blend of the two matte agents can achieve the excellent matte effect.
Through the comparison, the poly 4-methyl-1-pentene can achieve good matte effect no matter being used alone or mixed with other matte agents, and particularly has the most remarkable matte effect when mixed with acrylonitrile-styrene copolymer. Thus, the choice of the type and combination of use of the matting agents is an important factor affecting the matting effect of the plastic.
In particular, the matte agent in example 6 is compounded by adopting an acrylonitrile-styrene copolymer and poly-4-methyl-1-pentene, and the synergistic effect is achieved in the aspect of matte effect.
The main function of the matting agent is to change the roughness and reflectivity of the plastic surface so that the surface exhibits a "frosting" like effect, that is, to reduce the surface gloss of the plastic. This effect is usually achieved by light scattering at the microscopic level.
The acrylonitrile-styrene copolymer is composed of two monomers, acrylonitrile and styrene. Wherein, the acrylonitrile part contains polar cyano groups, which can enhance the compatibility with the base material and is beneficial to the dispersion of the matte agent in the base material; while the styrene portion provides rigidity and planarity, it may help to form a rough surface on a microscopic scale to enhance light scattering. Poly-4-methyl-1-pentene is a non-polar polyolefin polymer with weak intermolecular forces which can promote the formation of non-uniformly distributed microscopic particles or phases in the plastic substrate, thereby forming a roughened surface to enhance light scattering. When two matting agents, acrylonitrile-styrene copolymer and poly 4-methyl-1-pentene, are used together, the following occurs: (1) enhanced compatibility: due to the polarity of the acrylonitrile-styrene copolymer, compatibility with the substrate can be enhanced, so that the matting agent is better dispersed in the substrate. This ensures that a uniform matte effect is formed throughout the substrate. (2) microstructure modulation: acrylonitrile-styrene copolymer and poly-4-methyl-1-pentene may form complex microstructures in the plastic substrate, such as phase separation, microscopic particles, etc., which may form rough surfaces on multiple scales to enhance light scattering, thereby reducing gloss. (3) synergistic effects: the non-polar character of the acrylonitrile part of the acrylonitrile-styrene copolymer and the poly 4-methyl-1-pentene forms a special microstructure under the interaction, and the structure is more favorable for light scattering, thereby realizing better matte effect.
Test example 2:
the mechanical properties of example 6 were tested and the specific data are as follows:
tensile strength: 63kg/cm 2 ；
Flexural strength: 92kg/cm 2 ；
Flexural modulus: 2270kg/cm 2 ；
Elongation at break: 38%.
The high-temperature-resistant black matte master batch provided by the invention has excellent and uniform matte effect, can keep good performance under high temperature conditions, and has excellent mechanical properties, stability and durability. The master batch has wide application potential, and is suitable for various plastic products requiring matte and high temperature resistance, including but not limited to the fields of automobile interior and exterior trim parts, shells of electronic equipment, plastic materials for buildings and the like. By using the master batch disclosed by the invention, the plastic products can show better matte effect, and can keep the stability of performance and appearance under a high-temperature environment, so that the service life of the plastic products is prolonged. This innovation will bring more options and application possibilities to the relevant industry.

Claims (9)

1. The high Wen Ya light-resistant black master batch comprises polycarbonate, high pigment carbon black, N' -ethylene bis stearamide and a matte agent, and is characterized in that the matte agent is an organic type matte agent, and the organic type matte agent is at least one of an acrylonitrile-styrene copolymer, a crosslinked methyl methacrylate polymer and poly-4-methyl-1-pentene.
2. The Gao Wenya light-resistant black master batch according to claim 1, wherein: the organic matte agent is two of acrylonitrile-styrene copolymer, cross-linked methyl methacrylate polymer and poly-4-methyl-1-pentene.
3. The Gao Wenya light-resistant black master batch according to claim 2, wherein: the organic type matte agent is a composition of an acrylonitrile-styrene copolymer and a crosslinked methyl methacrylate polymer.
4. The Gao Wenya light-resistant black master batch according to claim 2, wherein: the organic type matte agent is a composition of a cross-linked methyl methacrylate polymer and poly-4-methyl-1-pentene.
5. The Gao Wenya light-resistant black master batch according to claim 2, wherein: the organic type matte agent is a composition of an acrylonitrile-styrene copolymer and poly-4-methyl-1-pentene.
6. The Gao Wenya light-resistant black master batch according to any one of claims 1 to 5, which is characterized by comprising the following raw materials in parts by weight:
30-90 parts by weight of polycarbonate;
10-40 parts by weight of high-pigment carbon black;
0.2-4 parts by weight of N, N' -ethylene bis stearamide;
1-9 parts of matte agent.
7. The Gao Wenya light-resistant black master batch according to claim 6, which is characterized by comprising the following raw materials in parts by weight:
40-80 parts by weight of polycarbonate;
15-35 parts by weight of high-pigment carbon black;
0.3-3 parts by weight of N, N' -ethylene bis stearamide;
2-8 parts of matte agent.
8. The Gao Wenya light-resistant black master batch according to claim 6, which is characterized by comprising the following raw materials in parts by weight:
50-70 parts by weight of polycarbonate;
20-30 parts by weight of high-pigment carbon black;
0.5-2 parts by weight of N, N' -ethylene bis stearamide;
4-6 parts of matte agent.
9. A method for preparing the Gao Wenya light-resistant black master batch according to any one of claims 1 to 8, comprising the steps of: mixing polycarbonate, high pigment carbon black, N' -ethylene bis stearamide and a matte agent, melt blending and granulating.
CN202311057425.1A 2023-08-22 2023-08-22 High Wen Ya light-resistant black master batch and preparation method thereof Pending CN116855060A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311057425.1A CN116855060A (en) 2023-08-22 2023-08-22 High Wen Ya light-resistant black master batch and preparation method thereof

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Publication Number Publication Date
CN116855060A true CN116855060A (en) 2023-10-10

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