CN108129820B - High-weather-resistance PC/ABS alloy material and preparation method thereof - Google Patents

High-weather-resistance PC/ABS alloy material and preparation method thereof Download PDF

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CN108129820B
CN108129820B CN201711174179.2A CN201711174179A CN108129820B CN 108129820 B CN108129820 B CN 108129820B CN 201711174179 A CN201711174179 A CN 201711174179A CN 108129820 B CN108129820 B CN 108129820B
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resin
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CN108129820A (en
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覃辉林
李强
罗明华
辛敏琦
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Shanghai Kumho Sunny Plastics Co Ltd
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract

The invention relates to a high weather-resistant PC/ABS alloy material and a preparation method thereof, wherein the alloy material comprises the following components in parts by weight: 50-80 parts of PC resin, 18-48 parts of ABS resin, 2-8 parts of photocrosslinking agent, 0.2-1 part of weather resistant agent, 0.1-1 part of antioxidant and 0.1-1 part of lubricant; when in preparation, the PC resin, the ABS resin, the photocrosslinking agent, the weather resisting agent, the antioxidant and the lubricant are uniformly mixed to obtain a mixture, and then the mixture is placed in a double-screw extruder for blending granulation. Compared with the prior art, the weather resistance of the PC/ABS alloy material can be greatly improved through the matching of the weather resistance agent and the photocrosslinking agent, the toughness of the PC/ABS alloy material can be obviously improved after the PC/ABS alloy material is irradiated by light, the PC/ABS alloy material can be applied to occasions with higher weather resistance requirements such as direct sunlight and the like, the preparation method is simple, and the industrial batch production can be conveniently realized.

Description

High-weather-resistance PC/ABS alloy material and preparation method thereof
Technical Field
The invention belongs to the technical field of modified resin, and relates to a high weather-resistant PC/ABS alloy material and a preparation method thereof.
Background
Polycarbonate (PC for short) has excellent impact resistance, heat resistance, good dimensional stability, electrical insulation and other properties, can be used in a wide temperature range, has a light transmittance of 90%, and is widely used in the fields of electronics, electrical, machinery, automobiles, aerospace, buildings, office and household products. But the molecular rigidity and the steric hindrance are larger, the melting temperature is higher (270-320 ℃), the processing is difficult, large thin-wall products are difficult to prepare, and the residual stress in the products is larger, so that stress cracking is easy to occur. The ABS resin (acrylonitrile-butadiene-styrene copolymer) has good processability and mechanical property, and the PC/ABS alloy material prepared by blending the ABS resin and PC is a plastic alloy with excellent processability, the performance and price of the PC/ABS alloy material are between those of PC and ABS, and compared with PC, the PC/ABS alloy material has the characteristics of low melt viscosity, good processability, excellent stress cracking resistance and the like, and the application range of PC is widened.
In the practical application process, chemical bonds in the polymer material molecules can be broken under the action of heat, light or oxygen to generate active free radicals and hydroperoxides. Among them, hydroperoxide is decomposed to generate hydroxyl radical and hydroxyl radical. These radicals can initiate a series of radical chain reactions leading to fundamental changes in the structure and properties of organic compounds. For example, in the case of an automobile interior and exterior trim made of a PC/ABS alloy material under irradiation of light, unsaturated double bonds of polybutadiene in ABS and ester bonds in PC are easily broken by irradiation of ultraviolet rays in sunlight, thereby causing problems of yellowing of the material, lowering of mechanical properties, and the like, and greatly limiting the application of the PC/ABS alloy material.
At present, the method for improving the weather resistance of PC/ABS alloy materials is mainly realized by adding various light stabilizers and ultraviolet screening agents. However, the actual requirement of the PC/ABS alloy material on weather resistance can not be met well only by adding the light stabilizer or the ultraviolet screening agent. Especially, PC/ABS alloy materials frequently used in occasions with high weather resistance requirements, such as automobile interior parts directly irradiated by sunlight, cannot meet the requirements of automobile host factories. Therefore, it is necessary to develop a PC/ABS alloy material with high weather resistance.
The application publication number CN102417704A discloses a weather-resistant flame-retardant polycarbonate composition, and the technology adds hydroxyphenyl triazine ultraviolet absorbent into polycarbonate resin to obtain better weather resistance. However, in dark products such as black or gray products, the effect of the ultraviolet absorber is reduced, and the effect of simply adding the ultraviolet absorber on improving the weather resistance is very limited. Chinese patent publication No. CN1209446 relates to a Hindered Amine Light Stabilizer (HALS) containing piperazinone or piperazine dione series, which makes PC have certain photostability and further alleviates yellowing or other forms of light-induced degradation. However, HALS has alkalinity, which can promote PC degradation, and further cause the mechanical property of PC/ABS alloy material to be reduced sharply.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high weather-resistant PC/ABS alloy material and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a high weather-resistant PC/ABS alloy material comprises the following components in parts by weight: 50-80 parts of PC resin, 18-48 parts of ABS resin, 2-8 parts of photocrosslinking agent, 0.2-1 part of weather resistant agent, 0.1-1 part of antioxidant and 0.1-1 part of lubricant.
As a preferable technical scheme, the alloy material comprises the following components in parts by weight: 55-75 parts of PC resin, 25-40 parts of ABS resin, 3-7 parts of photocrosslinking agent, 0.3-0.8 part of weather resistant agent, 0.2-0.8 part of antioxidant and 0.2-0.8 part of lubricant.
Further, the PC resin is aromatic polycarbonate, and the molar mass of the PC resin is 18000-30000 g/mol.
As a preferable technical scheme, the glass transition temperature of the PC resin is 150-180 ℃.
Preferably, the PC resin is bisphenol A polycarbonate. The bisphenol A type polycarbonate is also called 2, 2-bis (4' -hydroxyphenyl) propane polycarbonate, has the English name of bisphenol-Atypepo1ycarbonate, is polycarbonate with a molecular main chain containing a bisphenol A ester structure, and has the molar mass of 18000-30000 g/mol.
Further, the molar mass of the ABS resin is 100000-180000g/mol, and the mass ratio of butadiene, acrylonitrile and styrene in the ABS resin is 10-55:15-32: 30-70. Ensuring the compatibility between high molecular components and the apparent volume fraction of the rubber.
Further, the molecular chain of the photocrosslinking agent contains at least two photoactive groups. The photoactive group can generate active group reaction by absorbing light with specific wavelength, and only the photocrosslinking agent containing at least two photoactive groups has the functions of repairing polymer matrix macromolecular chains and the like.
As a preferred technical scheme, the photocrosslinking agent comprises one or more of triallyl isocyanurate (TAIC), 2',5,5' -tetracarboxylic acid acrylic acid (2-hydroxy) propylene glycol benzoic acid p-cyclohexyl diester or 4,4 '-diazido diphenyl ethylene-2, 2' -sodium disulfonate.
Wherein, the chemical structural formula of the triallyl isocyanurate is as follows:
Figure BDA0001477848760000031
further, the weather-resistant agent comprises one or two of benzotriazole weather-resistant agents or benzophenone weather-resistant agents. Compared with other weather resisting agents, the benzotriazole weather resisting agent or benzophenone weather resisting agent is an ultraviolet absorption type light stabilizer and can absorb light with a wavelength in a specific range, so that the benzotriazole weather resisting agent or benzophenone weather resisting agent can form a good synergistic effect with a photocrosslinking agent.
Further, the antioxidant comprises one or more of pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], triethylene glycol bis [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ], dioctadecyl alcohol pentaerythritol diphosphite or tris (2, 4-di-tert-butylphenyl) phosphite.
Further, the lubricant comprises one or more of liquid paraffin, solid paraffin, silane polymer, fatty acid salt, stearic acid amide, calcium stearate, zinc stearate, methylene bis stearic acid amide or N, N-ethylene bis stearic acid amide.
A preparation method of a high weather-resistant PC/ABS alloy material comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
Preferably, in step 1), the mixing is carried out in a mixer.
Further, in the step 2), the temperature of the twin-screw extruder is 250-320 ℃, and the rotating speed is 300-1000 r/min.
As a preferable technical scheme, in the step 2), the screws of the twin-screw extruder are co-rotating twin screws, and the length-diameter ratio of the co-rotating twin screws is more than 30.
According to the invention, the weather-resistant agent and the photocrosslinking agent are added into the PC/ABS alloy material, when the material is irradiated by light, especially ultraviolet light, a part of energy is absorbed by the weather-resistant agent, and the energy not absorbed by the weather-resistant agent is preferentially absorbed by the photocrosslinking agent, so that the damage of the light to the polycarbonate molecular chain is reduced, and the polycarbonate molecular chain which is damaged by heat or light is repaired, thereby obviously improving the weather resistance of the polymer and the toughness of the PC/ABS alloy material after the light irradiation.
Compared with the prior art, the invention has the following characteristics:
1) the weather resistance of the PC/ABS alloy material can be greatly improved through the matching of the weather resistance agent and the photocrosslinking agent, and the toughness of the PC/ABS alloy material can be obviously improved after the PC/ABS alloy material is irradiated by light, so that the PC/ABS alloy material can be applied to occasions with higher weather resistance requirements such as direct sunlight and the like;
2) the preparation method is simple and is convenient for realizing industrialized mass production.
Detailed Description
The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
the preparation process of the high weather resistant PC/ABS alloy material is as follows:
1) preparing the following components in parts by weight:
Figure BDA0001477848760000041
2) mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
3) and (3) placing the mixture in a double-screw extruder for blending granulation to obtain the high weather-resistant PC/ABS alloy material.
Wherein the set temperature of the extruder is 260 ℃, and the rotating speed of the screw is 600 rpm; the molar mass of the PC resin is 24000g/mol, and the glass transition temperature is 150 ℃; the ABS resin has a molar mass of 100000g/mol, wherein the weight percentage of butadiene is 55%, the weight percentage of acrylonitrile is 15%, and the weight percentage of styrene is 30%; the photocrosslinking agent is triallyl isocyanurate; the antioxidant is dioctadecyl alcohol pentaerythritol diphosphite; the lubricant was a mixture of 0.2 parts by weight of liquid paraffin and 0.3 parts by weight of solid paraffin.
Example 2:
the preparation process of the high weather resistant PC/ABS alloy material is as follows:
1) preparing the following components in parts by weight:
2) mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
3) and (3) placing the mixture in a double-screw extruder for blending granulation to obtain the high weather-resistant PC/ABS alloy material.
Wherein the set temperature of the extruder is 260 ℃, and the rotating speed of the screw is 600 rpm; the molar mass of the PC resin is 24000g/mol, and the glass transition temperature is 150 ℃; the ABS resin has a molar mass of 100000g/mol, wherein the weight percentage of butadiene is 55%, the weight percentage of acrylonitrile is 15%, and the weight percentage of styrene is 30%; the photocrosslinking agent is triallyl isocyanurate; the antioxidant is dioctadecyl alcohol pentaerythritol diphosphite; the lubricant was a mixture of 0.2 parts by weight of liquid paraffin and 0.3 parts by weight of solid paraffin.
Example 3:
the preparation process of the high weather resistant PC/ABS alloy material is as follows:
1) preparing the following components in parts by weight:
Figure BDA0001477848760000052
Figure BDA0001477848760000061
2) mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
3) and (3) placing the mixture in a double-screw extruder for blending granulation to obtain the high weather-resistant PC/ABS alloy material.
Wherein the set temperature of the extruder is 260 ℃, and the rotating speed of the screw is 600 rpm; the molar mass of the PC resin is 24000g/mol, and the glass transition temperature is 150 ℃; the ABS resin has a molar mass of 100000g/mol, wherein the weight percentage of butadiene is 55%, the weight percentage of acrylonitrile is 15%, and the weight percentage of styrene is 30%; the photocrosslinking agent is triallyl isocyanurate; the antioxidant is dioctadecyl alcohol pentaerythritol diphosphite; the lubricant was a mixture of 0.2 parts by weight of liquid paraffin and 0.3 parts by weight of solid paraffin.
Comparative example 1:
the preparation process of the PC/ABS alloy material is as follows:
1) preparing the following components in parts by weight:
Figure BDA0001477848760000062
2) mixing PC resin, ABS resin, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
3) and (3) placing the mixture in a double-screw extruder for blending granulation to obtain the PC/ABS alloy material.
Wherein the set temperature of the extruder is 260 ℃, and the rotating speed of the screw is 600 rpm; the molar mass of the PC resin is 24000g/mol, and the glass transition temperature is 150 ℃; the ABS resin has a molar mass of 100000g/mol, wherein the weight percentage of butadiene is 55%, the weight percentage of acrylonitrile is 15%, and the weight percentage of styrene is 30%; the antioxidant is dioctadecyl alcohol pentaerythritol diphosphite; the lubricant was a mixture of 0.2 parts by weight of liquid paraffin and 0.3 parts by weight of solid paraffin.
Comparative example 2:
the preparation process of the PC/ABS alloy material is as follows:
1) preparing the following components in parts by weight:
Figure BDA0001477848760000063
Figure BDA0001477848760000071
2) mixing PC resin, ABS resin, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
3) and (3) placing the mixture in a double-screw extruder for blending granulation to obtain the PC/ABS alloy material.
Wherein the set temperature of the extruder is 260 ℃, and the rotating speed of the screw is 600 rpm; the molar mass of the PC resin is 24000g/mol, and the glass transition temperature is 150 ℃; the ABS resin has a molar mass of 100000g/mol, wherein the weight percentage of butadiene is 55%, the weight percentage of acrylonitrile is 15%, and the weight percentage of styrene is 30%; the antioxidant is dioctadecyl alcohol pentaerythritol diphosphite; the lubricant was a mixture of 0.2 parts by weight of liquid paraffin and 0.3 parts by weight of solid paraffin.
The highly weather-resistant PC/ABS alloy materials prepared in examples 1-3 and the PC/ABS alloy materials prepared in comparative examples 1-2 were subjected to performance tests, and the results are shown in the following table:
Figure BDA0001477848760000072
wherein, the weathering resistance color difference test is that the natural color material is tested according to SAE 2412 standard, and the toughness test of the material after the weathering resistance test is tested according to IZOD impact strength (ASTM D256).
As can be seen from the experimental results in the table above, the weather resistance of the high weather-resistant PC/ABS alloy materials prepared in examples 1-3 is obviously improved compared with that of the PC/ABS alloy materials prepared in comparative examples 1-2, and the toughness is also improved compared with that before the weather-resistant experiment.
Example 4:
a high weather-resistant PC/ABS alloy material comprises the following components in parts by weight: 50 parts of PC resin, 48 parts of ABS resin, 2 parts of photocrosslinking agent, 1 part of weather resisting agent, 0.1 part of antioxidant and 1 part of lubricant.
The PC resin is aromatic polycarbonate, the molar mass of the PC resin is 18000-30000g/mol, the molar mass of the ABS resin is 100000-120000g/mol, the mass ratio of butadiene, acrylonitrile and styrene in the ABS resin is 50:19:42, the molecular chain of a photocrosslinking agent contains two photoactive groups, the weather-resistant agent is a benzophenone weather-resistant agent, the antioxidant is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl 4-hydroxyphenyl) propionate ], and the lubricant is N, N-ethylene bis stearamide.
The preparation method of the high weather-resistant PC/ABS alloy material comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
In the step 2), the temperature of the double-screw extruder is 250 ℃, and the rotating speed is 1000 r/min.
Example 5:
a high weather-resistant PC/ABS alloy material comprises the following components in parts by weight: 80 parts of PC resin, 18 parts of ABS resin, 8 parts of photocrosslinking agent, 0.2 part of weather resisting agent, 1 part of antioxidant and 0.1 part of lubricant.
The PC resin is aromatic polycarbonate, the molar mass of the PC resin is 18000-30000g/mol, the molar mass of the ABS resin is 110000-150000g/mol, the mass ratio of butadiene to acrylonitrile to styrene in the ABS resin is 17:30:55, the molecular chain of a photocrosslinking agent contains three photoactive groups, the weather-resistant agent is a benzotriazole weather-resistant agent, the antioxidant is diethylene glycol bis [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ], and the lubricant is a silane polymer.
The preparation method of the high weather-resistant PC/ABS alloy material comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
In the step 2), the temperature of the double-screw extruder is 320 ℃, and the rotating speed is 300 r/min.
Example 6:
a high weather-resistant PC/ABS alloy material comprises the following components in parts by weight: 55 parts of PC resin, 40 parts of ABS resin, 3 parts of photocrosslinking agent, 0.8 part of weather resisting agent, 0.2 part of antioxidant and 0.8 part of lubricant.
Wherein the PC resin is aromatic polycarbonate, and the molar mass of the PC resin is 23000-30000 g/mol; the molar mass of the ABS resin is 140000-180000g/mol, and the mass ratio of butadiene, acrylonitrile and styrene in the ABS resin is 21:17: 43; the molecular chain of the photocrosslinking agent contains four photoactive groups; the weather-resistant agent comprises a benzotriazole weather-resistant agent and a benzophenone weather-resistant agent; antioxidants include dioctadecyl alcohol pentaerythritol diphosphite and tris (2, 4-di-t-butylphenyl) phosphite; the lubricant comprises methylene bis stearamide and N, N-ethylene bis stearamide.
The preparation method of the high weather-resistant PC/ABS alloy material comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
In the step 2), the temperature of the double-screw extruder is 270 ℃, and the rotating speed is 800 r/min.
Example 7:
a high weather-resistant PC/ABS alloy material comprises the following components in parts by weight: 75 parts of PC resin, 25 parts of ABS resin, 7 parts of photocrosslinking agent, 0.3 part of weather resisting agent, 0.8 part of antioxidant and 0.2 part of lubricant.
The PC resin is aromatic polycarbonate, the molar mass of the PC resin is 20000-180 g/mol, the molar mass of the ABS resin is 100000-180000g/mol, the mass ratio of butadiene, acrylonitrile and styrene in the ABS resin is 55:15:70, the molecular chain of a photocrosslinking agent contains five photoactive groups, the weather-resistant agent is a benzophenone weather-resistant agent, the antioxidant comprises tetra [ β - (3, 5-di-tert-butyl 4-hydroxyphenyl) propionic acid ] pentaerythritol ester, diethylene glycol bis [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ] and dioctadecyl alcohol pentaerythritol diphosphite, and the lubricant comprises fatty acid salt, stearic acid amide, calcium stearate and zinc stearate.
The preparation method of the high weather-resistant PC/ABS alloy material comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
In the step 2), the temperature of the double-screw extruder is 290 ℃, and the rotating speed is 600 r/min.
Example 8:
a high weather-resistant PC/ABS alloy material comprises the following components in parts by weight: 65 parts of PC resin, 32 parts of ABS resin, 5 parts of photocrosslinking agent, 0.6 part of weather resisting agent, 0.5 part of antioxidant and 0.5 part of lubricant.
The PC resin is aromatic polycarbonate, the molar mass of the PC resin is 18000-25000g/mol, the molar mass of the ABS resin is 100000-180000g/mol, the mass ratio of butadiene, acrylonitrile and styrene in the ABS resin is 10:32:30, the molecular chain of a photocrosslinking agent contains two photoactive groups, the weather-resistant agent is a benzotriazole weather-resistant agent, the antioxidant comprises one or more of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, diethylene glycol bis [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ], dioctadecyl alcohol pentaerythritol diphosphite and tris (2, 4-di-tert-butylphenyl) phosphite, and the lubricant comprises liquid paraffin, solid paraffin and silane polymer.
The preparation method of the high weather-resistant PC/ABS alloy material comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
In the step 2), the temperature of the double-screw extruder is 310 ℃, and the rotating speed is 450 r/min.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (9)

1. The high weather-resistant PC/ABS alloy material is characterized by comprising the following components in parts by weight: 50-80 parts of PC resin, 18-48 parts of ABS resin, 2-8 parts of photocrosslinking agent, 0.2-1 part of weather resistant agent, 0.1-1 part of antioxidant and 0.1-1 part of lubricant;
the molecular chain of the photocrosslinking agent contains at least two photoactive groups;
the weather-resistant agent comprises one or two of benzotriazole weather-resistant agent or benzophenone weather-resistant agent;
the photocrosslinking agent comprises one or more of triallyl isocyanurate, 2',5,5' -tetracarboxylic acid acrylic acid (2-hydroxy) propylene diester benzoic acid p-cyclohexyl diester or 4,4 '-diazido diphenyl ethylene-2, 2' -sodium disulfonate.
2. The high weather resistant PC/ABS alloy material as claimed in claim 1, wherein the alloy material comprises the following components in parts by weight: 55-75 parts of PC resin, 25-40 parts of ABS resin, 3-7 parts of photocrosslinking agent, 0.3-0.8 part of weather resistant agent, 0.2-0.8 part of antioxidant and 0.2-0.8 part of lubricant.
3. The highly weather-resistant PC/ABS alloy material as recited in claim 1, wherein the PC resin is aromatic polycarbonate, and the molar mass of the PC resin is 18000-30000 g/mol.
4. The highly weather-resistant PC/ABS alloy material as claimed in claim 1, wherein the molar mass of the ABS resin is 100000-180000g/mol, and the mass ratio of butadiene, acrylonitrile and styrene in the ABS resin is 10-55:15-32: 30-70.
5. The highly weatherable PC/ABS alloy material of claim 1, wherein the antioxidant comprises one or more of pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], triethylene glycol bis [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate ], dioctadecyl alcohol pentaerythritol diphosphite or tris (2, 4-di-tert-butylphenyl) phosphite.
6. The highly weatherable PC/ABS alloy material according to claim 1, wherein said lubricant comprises one or more of liquid paraffin, solid paraffin, silane polymer, fatty acid salt, methylene bis stearamide or N, N-ethylene bis stearamide.
7. The highly weatherable PC/ABS alloy material of claim 6, wherein said fatty acid salt comprises one or more of calcium stearate or zinc stearate.
8. A method for preparing the highly weather-resistant PC/ABS alloy material as recited in any one of claims 1 to 7, wherein the method comprises the following steps:
1) uniformly mixing PC resin, ABS resin, a photocrosslinking agent, a weather resisting agent, an antioxidant and a lubricant to obtain a mixture;
2) and (3) placing the mixture in a double-screw extruder for blending and granulation.
9. The method for preparing the highly weather-resistant PC/ABS alloy material as recited in claim 8, wherein in the step 2), the temperature of the twin-screw extruder is 250-320 ℃, and the rotation speed is 300-1000 r/min.
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