CN111333954A - Illumination aging resistant plastic for automotive interior parts and processing technology thereof - Google Patents
Illumination aging resistant plastic for automotive interior parts and processing technology thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- 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
- C08K2201/011—Nanostructured additives
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- 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
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- 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
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- 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
Abstract
The invention relates to the technical field of manufacturing of automotive upholstery materials, and aims to provide a light aging resistant plastic for automotive upholstery and a processing technology thereof, wherein the technical scheme is characterized by comprising the following components in parts by weight: 70-90 parts of polypropylene, 18-28 parts of ethylene propylene diene monomer, 20-30 parts of inorganic mineral filler, 8-12 parts of ultraviolet resistant agent, 6-10 parts of antioxidant, 0.15-0.25 part of coupling agent, 1-3 parts of dispersing agent and 1-3 parts of antistatic agent; wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1 (0.5-1); the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1 (0.5-1); the specific processing technology comprises the following steps: s1, proportioning and preparing materials; s2, drying and mixing; s3, stirring and mixing; s4, extrusion molding; s5, underwater pelletizing; s6, dewatering and sieving; and S7, quality inspection and packaging. The plastic for the automotive interior parts, prepared by the invention, has the advantages of excellent illumination aging resistance, good oxidation aging resistance and long service life.
Description
Technical Field
The invention relates to the technical field of manufacturing of automotive upholstery materials, in particular to illumination aging resistant plastic for automotive upholstery and a processing technology thereof.
Background
The automotive interior part mainly refers to an automotive product used for refitting the interior of an automobile, and relates to the square surface of the interior of the automobile, for example, glove boxes, automobile chair back plates, automobile mosaic plates, automobile side plates, upright post guard plates, door plates, automobile auxiliary instrument panels, glove boxes, radio boxes, central control consoles and the like are all automotive interior part products. The automobile interior system is an important component of an automobile body, and the design workload of the interior system accounts for more than 60% of the design workload of the automobile model, far exceeds the appearance of the automobile and is one of the most important parts of the automobile body.
Chinese patent with application publication number CN102702623A discloses an antistatic PP/HDPE plastic for automotive interior parts and a preparation method thereof, wherein the antistatic PP/HDPE plastic comprises the following components in parts by weight: 100 parts of polypropylene, 20-30 parts of high-density polyethylene, 10-20 parts of ethylene propylene diene monomer, 1-5 parts of coupling agent and 0.1-5 parts of antistatic agent. Weighing the raw materials according to the proportion, uniformly mixing, melting, mixing, extruding and granulating to obtain the product.
Although the antistatic property of the plastic is improved by adding the antistatic agent in the prior art, the antistatic property of the automotive interior part made of the plastic is endowed, in the actual use process, the automotive interior part is easy to yellow due to the influence of illumination and easy to age after illumination for a period of time, so that the material property and the service life of the automotive interior part are reduced. Accordingly, there is a need for improvements and enhancements in the resistance of plastics for automotive interiors to light aging.
Disclosure of Invention
The invention aims to provide the illumination aging resistant plastic for the automotive upholstery and the processing technology thereof.
The technical purpose of the invention is realized by the following technical scheme:
the light aging resistant plastic for the automotive interior trim part comprises the following components in parts by weight: 70-90 parts of polypropylene, 18-28 parts of ethylene propylene diene monomer, 20-30 parts of inorganic mineral filler, 8-12 parts of anti-ultraviolet agent, 6-10 parts of antioxidant, 0.15-0.25 part of coupling agent and 1-3 parts of dispersing agent;
the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1 (0.5-1).
By adopting the technical scheme, the polypropylene belongs to thermoplastic plastics, is easy to process and form, has strong chemical stability resistance, high tensile yield strength, large surface hardness and good elasticity and wear resistance, and is ideal plastic for processing and forming automotive upholstery; the ethylene propylene diene monomer is a terpolymer of ethylene, propylene and non-conjugated diene, and the molecular chain of the main polymer of the ethylene propylene diene monomer is completely saturated, so that the ethylene propylene diene monomer can resist the oxidation of heat, light and oxygen, particularly ozone, and the light aging resistance of the plastic is effectively improved;
the inorganic mineral filler is a powder material, the powder particles are rigid, the mixed inorganic mineral filler is added into the polypropylene powder material for mixing, and the polypropylene powder material and the inorganic mineral filler are dispersed and compatible, and the rigid particles of the inorganic mineral filler can obviously improve the impact strength of the polypropylene material;
because the polypropylene molecule structure has tertiary carbon atoms, the hydrogen on the tertiary carbon atoms is very active and is easy to be oxidized, and simultaneously, the polypropylene molecule can form a small amount of double bonds in the polymerization process, so that the polypropylene molecule can be oxidized and degraded under the conditions of ultraviolet rays and thermal oxygen, thereby accelerating the aging of the material. It is therefore desirable to improve the antioxidant properties of the masterbatch by adding a suitable antioxidant. The antioxidant can provide hydrogen atoms which are more active than hydrogen atoms in polypropylene molecules, and can reduce the probability of oxidation of the hydrogen atoms in the polypropylene molecules, thereby having the effect of improving the oxidation resistance of the polypropylene molecules; the ultraviolet resistant agent can absorb or shield light radiation, thereby reducing the possibility of photochemical reaction generated by the radiation of the light to polypropylene molecules and further delaying the aging of plastics;
the coupling agent has an inorganophilic group in the molecule, is easy to react with inorganics, and also has an organophilic group which can react with synthetic resin or other polymers or generate hydrogen bonds and dissolve in the synthetic resin or other polymers. Therefore, the coupling agent can effectively improve the interface action between the inorganic mineral filler and the polypropylene molecules, thereby obviously improving the mechanical properties of the polypropylene composite material, such as strength, toughness and the like.
Further, the inorganic mineral filler comprises nano calcium carbonate and talcum powder in a mass ratio of 4: 1.
By adopting the technical scheme, the shapes of the nano calcium carbonate are different, and the nano calcium carbonate comprises cubic nano calcium carbonate and fibrous nano calcium carbonate, wherein the cubic nano calcium carbonate is beneficial to improving the impact function of the composite material, and the fibrous nano calcium carbonate can obviously improve the tensile property of the material, so that the addition of the nano calcium carbonate can obviously enhance the impact strength and toughness of the polypropylene material; the talcum powder has excellent physical and chemical properties such as good lubricity, viscosity resistance, flow aiding property, high melting point, good chemical stability and the like, and can improve the mixing and dispersing uniformity of materials, thereby being beneficial to further improving the stability of the strength and toughness of the polypropylene.
Further, the light aging resistant plastic for the automotive interior trim part further comprises 1-3 parts of an antistatic agent.
By adopting the technical scheme, the antistatic agent can improve the antistatic performance of polypropylene plastic molecules, thereby being beneficial to reducing the static phenomenon of the automotive interior trim part and improving the use safety of the automotive interior trim part.
Further, the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1 (0.5-1).
By adopting the technical scheme, the ultraviolet resistant agent can absorb or shield light radiation, so that the possibility of photochemical reaction generated by the radiation of light to polypropylene molecules is reduced, and the aging of plastic molecules is further delayed, wherein the nano zinc oxide is novel inorganic white powder, and the size effect can be generated due to the fact that the size of particles is equivalent to or smaller than that of light waves, so that the plastic molecules have stronger light absorption capacity and better ultraviolet shielding and scattering effects; the benzophenone is a nontoxic and safe white crystal, can effectively absorb ultraviolet rays and convert the ultraviolet rays into harmless rays in other wave bands, and can further improve the ultraviolet resistance of the polypropylene.
Further, the main antioxidant is pentaerythritol tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
By adopting the technical scheme, the tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester is a high-molecular hindered phenol antioxidant, has low volatility, is not easy to migrate, has good extraction resistance and high thermal stability, and can effectively and durably play a role in antioxidation after being combined with polypropylene molecules.
Further, the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite.
By adopting the technical scheme, the tris [ (2, 4-di-tert-butylphenyl) ] phosphite ester generates a stable inactive product by decomposing peroxide generated in the oxidation process, so that the oxidation process of the high polymer material is delayed, and the service life of the material is prolonged; on the other hand, [ (2, 4-di-tert-butylphenyl) ] phosphite can form a synergistic effect with the hindered phenol-based primary antioxidant, and the antioxidant performance of the material can be further improved.
Further, the dispersing agent is polypropylene grafted maleic anhydride.
By adopting the technical scheme, the polypropylene grafted maleic anhydride has a strong polar reactive group, so that the polarity of polypropylene molecules can be improved, and the compatibility of the polypropylene molecules with other fillers or additives is improved; on the other hand, the polypropylene grafted maleic anhydride and the 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane can play a synergistic role, and can remarkably improve the strength, the cohesive force and the dispersibility of the material, thereby further improving the dispersibility and the compatibility of the polypropylene.
Further, the coupling agent is aluminum carbonate.
Through adopting above-mentioned technical scheme, aluminium carbonate thermal stability, chemical stability are good, can effectively improve the interface effect between nanometer calcium carbonate, talcum powder and the polypropylene molecule for can be better between nanometer calcium carbonate, talcum powder and the polypropylene molecule dissolve dispersion mutually, bridge the mutual bridging of nanometer calcium carbonate, talcum powder and polypropylene molecule simultaneously, more firm connection is in the same place, plays and is showing the effect that increases polypropylene intensity and toughness.
A processing technology of illumination aging resistant plastic for automotive interior parts is characterized by comprising the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature-control high-speed mixer to 700-800 rpm, adjusting the temperature to 70-80 ℃, after the temperature-control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature-control high-speed mixer, and continuously stirring and mixing for 25-35 min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 400-500 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
By adopting the technical scheme, the inorganic mineral filler and the aluminum carbonate coupling agent are fully dried and uniformly dispersed under the conditions of high rotating speed and high temperature in the temperature-controlled high-speed mixer; the aluminum carbonate coupling agent is uniformly coated on the surface of the inorganic mineral filler under the action of high temperature and strong shearing force, so that the surface modification of the inorganic mineral filler is realized;
then, by stirring and mixing, the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent are added into the modified inorganic mineral filler, so that the inorganic mineral filler can be fully dissolved and filled with the polypropylene powder, and the effect of increasing the impact strength of the polypropylene composite material is achieved; the aluminum carbonate coupling agent can further increase the crosslinking degree of polypropylene molecules and increase the melt index of the mixture, thereby achieving the effect of improving the mechanical property of the material; the polypropylene melt can be efficiently and stably produced through a double-screw extruder, and the formed polypropylene master batch suitable for processing automotive upholstery is obtained through water-cooling granulation.
In conclusion, the invention has the following beneficial effects:
1. according to the invention, polypropylene is used as a polymer raw material, and ethylene propylene diene monomer, an anti-ultraviolet agent and an antioxidant are added, so that the light aging resistance and the oxidation aging resistance of the polypropylene material are improved, and the effect of prolonging the service life of the automotive upholstery is further achieved;
2. according to the invention, the inorganic mineral filler formed by compounding nano calcium carbonate and talcum powder is added into the polypropylene powder, so that the effects of obviously improving the impact strength and tensile toughness of the polypropylene material are achieved;
3. according to the invention, the antistatic agent is added, and the antistatic property of polypropylene plastic molecules can be improved, so that the static phenomenon of the automotive interior trim part can be reduced, and the use safety of the automotive interior trim part can be improved;
4. according to the invention, the aluminum carbonate coupling agent is uniformly coated on the surface of the inorganic mineral filler by adopting the temperature-controlled high-speed mixer, so that the surface modification of the inorganic mineral filler is realized, the mixing compatibility between the inorganic mineral filler and the polypropylene powder is further improved, and the mechanical strength and the component stability of the polypropylene material are also improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example (b):
example 1: the light aging resistant plastic for the automotive interior trim part comprises the following components in parts by weight: 70 parts of polypropylene, 18 parts of ethylene propylene diene monomer, 20 parts of inorganic mineral filler, 8 parts of ultraviolet resistant agent, 6 parts of antioxidant, 0.15 part of aluminum carbonate coupling agent, 1 part of polypropylene grafted maleic anhydride dispersing agent and 1 part of antistatic agent; wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1:0.5, the main antioxidant is tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite; the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1: 0.5; the processing technology of the illumination aging resistant plastic for the automotive interior trim part comprises the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature-control high-speed mixer to 700rpm, adjusting the temperature to 70 ℃, after the temperature-control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature-control high-speed mixer, and continuously stirring and mixing for 25min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 400 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
Example 2: the light aging resistant plastic for the automotive interior trim part comprises the following components in parts by weight: 75 parts of polypropylene, 21 parts of ethylene propylene diene monomer, 23 parts of inorganic mineral filler, 9 parts of ultraviolet resistant agent, 7 parts of antioxidant, 0.17 part of aluminum carbonate coupling agent, 1.5 parts of polypropylene grafted maleic anhydride dispersing agent and 1.5 parts of antistatic agent; wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1:0.6, the main antioxidant is tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite; the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1: 0.6;
the processing technology of the illumination aging resistant plastic for the automotive interior trim part comprises the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature control high-speed mixer to 720rpm, adjusting the temperature to 72 ℃, after the temperature control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature control high-speed mixer, and continuously stirring and mixing for 27min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 430 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
Example 3: the light aging resistant plastic for the automotive interior trim part comprises the following components in parts by weight: 80 parts of polypropylene, 24 parts of ethylene propylene diene monomer, 26 parts of inorganic mineral filler, 10 parts of ultraviolet resistant agent, 8 parts of antioxidant, 0.19 part of aluminum carbonate coupling agent, 2 parts of polypropylene grafted maleic anhydride dispersing agent and 2 parts of antistatic agent; wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1:0.7, the main antioxidant is tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite; the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1: 0.7;
the processing technology of the illumination aging resistant plastic for the automotive interior trim part comprises the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature-control high-speed mixer to 740rpm, adjusting the temperature to 74 ℃, after the temperature-control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature-control high-speed mixer, and continuously stirring and mixing for 29min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 460 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
Example 4: the light aging resistant plastic for the automotive interior trim part comprises the following components in parts by weight: 85 parts of polypropylene, 26 parts of ethylene propylene diene monomer, 28 parts of inorganic mineral filler, 11 parts of ultraviolet resistant agent, 9 parts of antioxidant, 0.23 part of aluminum carbonate coupling agent, 2.5 parts of polypropylene grafted maleic anhydride dispersing agent and 2.5 parts of antistatic agent; wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1:0.9, the main antioxidant is tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite; the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1: 0.9;
the processing technology of the illumination aging resistant plastic for the automotive interior trim part comprises the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature-control high-speed mixer to 780rpm, adjusting the temperature to 76 ℃, after the temperature-control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature-control high-speed mixer, and continuously stirring and mixing for 33min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 480 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
Example 5: the light aging resistant plastic for the automotive interior trim part comprises the following components in parts by weight: 90 parts of polypropylene, 28 parts of ethylene propylene diene monomer, 30 parts of inorganic mineral filler, 12 parts of ultraviolet resistant agent, 10 parts of antioxidant, 0.25 part of aluminum carbonate coupling agent, 3 parts of polypropylene grafted maleic anhydride dispersing agent and 3 parts of antistatic agent; wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1:1, the main antioxidant is tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite ester; the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1: 1;
the processing technology of the illumination aging resistant plastic for the automotive interior trim part comprises the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature-control high-speed mixer to 800rpm, adjusting the temperature to 80 ℃, after the temperature-control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature-control high-speed mixer, and continuously stirring and mixing for 35min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 500 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
Comparative example
Comparative example 1: compared with the embodiment 1, the difference of the plastic for the automotive interior parts is that pentaerythritol tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] ester is not added as a main antioxidant.
Comparative example 2: the difference between the illumination aging resistant plastic for the automotive upholstery and the processing technology thereof and the embodiment 1 is that nano zinc oxide is not added in the ultraviolet resistant agent.
Comparative example 3: compared with the embodiment 1, the difference of the illumination aging resistant plastic for the automotive upholstery is that benzophenone is not added in the ultraviolet resistant agent.
Comparative example 4: the difference between the light aging resistant plastic for the automotive upholstery and the processing technology thereof and the embodiment 1 is that polypropylene grafted maleic anhydride is not added as a dispersing agent.
Comparative example 5: the difference between the light aging resistant plastic for the automotive upholstery and the processing technology thereof and the embodiment 1 is that no inorganic mineral filler is added.
Performance detection
Polypropylene composite materials with the same specification are prepared according to the methods in the examples 1-5 and the comparative examples 1-4, and the performances of the materials are detected according to the following methods, and the test results are shown in the table 1:
1. melt mass flow rate: the determination is carried out according to the GB/T3682-2000 standard;
2. tensile strength, elongation at break: measuring according to GB/T1040.2-2006 standard;
3. xenon lamp aging test: the retention of elongation at break of the material after aging test was determined according to GB/T16422.2 standard.
TABLE 1 Performance test results of the polypropylene composites prepared in each of the examples and comparative examples
As can be seen from Table 1, the melt index, tensile strength and elongation at break of the comparative example 5 are lower than the detection values of the other examples and comparative examples, which shows that the addition of the inorganic mineral filler has an obvious accelerating effect on the mechanical strength of the polypropylene plastic; the elongation at break after aging of the examples 1 to 5 is obviously higher than the detection values of the comparative examples 1 to 3, which shows that the addition of the antioxidant and the ultraviolet resistant agent in the invention has obvious improvement and improvement effects on the aging resistance of the polypropylene material; the elongation at break of the comparative examples 4 to 5 is lower than that of the comparative examples 1 to 3, which shows that the addition of the dispersant and the inorganic mineral filler can improve the intermolecular strength of the polypropylene material and the uniformity of the molecular strength, thereby being beneficial to improving the tensile strength of the material.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. The utility model provides an automotive interior spare is with resistant illumination ageing plastics which characterized in that: the paint comprises the following components in parts by weight: 70-90 parts of polypropylene, 18-28 parts of ethylene propylene diene monomer, 20-30 parts of inorganic mineral filler, 8-12 parts of anti-ultraviolet agent, 6-10 parts of antioxidant, 0.15-0.25 part of coupling agent and 1-3 parts of dispersing agent;
the antioxidant comprises a main antioxidant and an auxiliary antioxidant in a mass ratio of 1 (0.5-1).
2. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the inorganic mineral filler comprises nano calcium carbonate and talcum powder in a mass ratio of 4: 1.
3. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the light aging resistant plastic for the automotive interior parts further comprises 1-3 parts of an antistatic agent.
4. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the anti-ultraviolet agent comprises nano zinc oxide and benzophenone in a mass ratio of 1 (0.5-1).
5. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the main antioxidant is tetra [ methyl- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
6. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the auxiliary antioxidant is tris [ (2, 4-di-tert-butylphenyl) ] phosphite.
7. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the dispersing agent is polypropylene grafted maleic anhydride.
8. The light aging resistant plastic for automotive interior parts according to claim 1, wherein: the coupling agent is aluminum carbonate.
9. The processing technology of the light aging resistant plastic for the automotive interior trim part according to claims 1 to 8, characterized by comprising the following steps:
s1, preparing materials: weighing the polypropylene, the ethylene propylene diene monomer, the inorganic mineral filler, the ultraviolet resistant agent, the antioxidant, the coupling agent, the dispersant and the antistatic agent according to the formula for later use;
s2, drying and mixing: adding the inorganic mineral filler and the coupling agent into a temperature-controlled high-speed mixer, setting the rotating speed to be 1000rpm, rapidly raising the temperature in the high-speed mixer to 105 ℃, stirring and mixing at a high speed for 20min, drying and uniformly dispersing the materials, and simultaneously, in the high-speed stirring process, uniformly coating the coupling agent on the surfaces of the inorganic mineral filler particles to modify the inorganic mineral filler;
s3, stirring and mixing: adjusting the rotating speed of the temperature-control high-speed mixer to 700-800 rpm, adjusting the temperature to 70-80 ℃, after the temperature-control high-speed mixer stably operates, uniformly adding polypropylene, ethylene propylene diene monomer, inorganic mineral filler, an anti-ultraviolet agent, an antioxidant, a coupling agent, a dispersing agent and an antistatic agent into the temperature-control high-speed mixer, and continuously stirring and mixing for 25-35 min to obtain a premix;
s4, extrusion molding: adding the premix obtained in the step S3 into a double-screw extruder, and setting the temperature of each temperature zone of the double-screw extruder as follows: the temperature of the 1 st temperature zone is 160-165 ℃, the temperature of the 2 nd-9 th temperature zone is 180-185 ℃, the temperature of the 10 th-11 th temperature zone is 170-175 ℃, and the rotating speed of the double-screw extruder is 400-500 rpm;
s5, underwater pelletizing: cooling and shaping the molten nascent plastic extruded from the double-screw extruder under water, and granulating by a granulator in the cooling process;
s6, dewatering and sieving: centrifugally dewatering, sieving and grading the granulated plastic master batch;
s7, quality inspection packaging: and (5) detecting and packaging the plastic master batch.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048114A (en) * | 2020-09-17 | 2020-12-08 | 广西鑫深科技有限公司 | Special material for automobile exterior decoration prepared from TPO skin reclaimed material and preparation method thereof |
| CN114875517A (en) * | 2022-06-13 | 2022-08-09 | 江苏惠康特种纤维有限公司 | ES fiber for automotive interior trim panel and preparation method thereof |
| CN114874533A (en) * | 2022-05-12 | 2022-08-09 | 深圳市普拉托科技有限公司 | Ageing-resistant commodity circulation tray |
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| CN1286278A (en) * | 2000-09-28 | 2001-03-07 | 广州金发科技发展有限公司 | Outdoor-type polypropylene compound resisting against light radiation, high-temp, weather and ageing |
| CN110218388A (en) * | 2019-05-27 | 2019-09-10 | 江苏汉德纳米材料科技有限公司 | A kind of antiultraviolet ageing resistance polypropylene master batch and its manufacturing process |
| CN110317396A (en) * | 2019-05-27 | 2019-10-11 | 江苏汉德纳米材料科技有限公司 | A kind of polypropylene agglomerate and its manufacturing process of high-strength and high ductility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1286278A (en) * | 2000-09-28 | 2001-03-07 | 广州金发科技发展有限公司 | Outdoor-type polypropylene compound resisting against light radiation, high-temp, weather and ageing |
| CN110218388A (en) * | 2019-05-27 | 2019-09-10 | 江苏汉德纳米材料科技有限公司 | A kind of antiultraviolet ageing resistance polypropylene master batch and its manufacturing process |
| CN110317396A (en) * | 2019-05-27 | 2019-10-11 | 江苏汉德纳米材料科技有限公司 | A kind of polypropylene agglomerate and its manufacturing process of high-strength and high ductility |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112048114A (en) * | 2020-09-17 | 2020-12-08 | 广西鑫深科技有限公司 | Special material for automobile exterior decoration prepared from TPO skin reclaimed material and preparation method thereof |
| CN114874533A (en) * | 2022-05-12 | 2022-08-09 | 深圳市普拉托科技有限公司 | Ageing-resistant commodity circulation tray |
| CN114875517A (en) * | 2022-06-13 | 2022-08-09 | 江苏惠康特种纤维有限公司 | ES fiber for automotive interior trim panel and preparation method thereof |
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