CN112552582B - Anti-tiger stripe and high-heat-resistance automobile instrument board material and preparation method and application thereof - Google Patents
Anti-tiger stripe and high-heat-resistance automobile instrument board material and preparation method and application thereof Download PDFInfo
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- CN112552582B CN112552582B CN201910918908.3A CN201910918908A CN112552582B CN 112552582 B CN112552582 B CN 112552582B CN 201910918908 A CN201910918908 A CN 201910918908A CN 112552582 B CN112552582 B CN 112552582B
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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
- 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
- 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
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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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention discloses a tiger-skin-resistant high-heat-resistance automobile instrument board material and a preparation method and application thereof, wherein the tiger-skin-resistant high-heat-resistance automobile instrument board material comprises the following components in parts by weight: 50-75 parts of polypropylene mixture, 15-25 parts of toughening agent, 10-25 parts of mineral powder, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of nucleating agent, 0.4-1.2 parts of heat-resistant assistant and 0.2-0.5 part of light-resistant assistant; wherein the polypropylene blend comprises three polypropylenes with different melt indexes. The polypropylene composite material has the advantages that the tiger skin texture phenomenon generated during material injection molding is obviously improved by the compound use of the polypropylene with different melt indexes, meanwhile, the specific toughening agent and the nucleating agent are used, so that the material has good heat resistance, high modulus at normal temperature and good toughness at low temperature, and the instrument board produced by using the material does not deform and collapse when being hot in summer and does not become brittle and crack when being cold in winter.
Description
Technical Field
The invention belongs to the technical field of modification and processing of high polymer materials, and particularly relates to a tiger-stripe-resistant high-heat-resistance automobile instrument board material and a preparation method and application thereof.
Background
Polypropylene (PP) is a thermoplastic plastic with low density, high surface hardness of finished products, high elasticity, good heat resistance, chemical stability and insulation, and is widely applied to various fields of production and life. In the fields of automobile industry, household appliances and machinery, the application range of the modified polypropylene material is continuously expanded, and the technical requirements on the modified polypropylene are higher and higher.
Because the mold structure is complex and the flow is long, when PP material is used for injection molding, one line is easy to appear in the vertical flow direction, commonly called tiger skin lines, and the appearance of the product is influenced by the existence of the tiger skin lines.
The modified polypropylene material formula generally contains two or more PP matrixes and elastomers, and the raw material components have different viscosities and different adhesive forces with the inner wall of a charging barrel of an injection molding machine during flowing. In the flowing process of the melt, when the workpiece is thin, the mold temperature is too low, the flow is too long or the injection speed is high, the flow resistance of the melt is increased, the melt flow is obviously decelerated or stopped, and the appearance gloss of the filled area is poor and narrow. And the new hot melt can continuously flow forward and jump under the pushing of the injection molding machine by a section of pressure, and the newly filled area has good luster and wider appearance. The filling is performed alternately, so that the product surface has stripes with different glossiness.
Disclosure of Invention
The invention aims to provide a tiger-skin-resistant high-heat-resistance automobile instrument board material and a preparation method and application thereof, wherein the tiger-skin-resistant high-heat-resistance automobile instrument board material effectively improves the tiger skin phenomenon generated during material injection molding by compounding polypropylene with different flowability; meanwhile, the material has good heat resistance, high modulus at normal temperature and good toughness at low temperature, and the instrument panel produced by using the material does not deform and collapse when being hot in summer and does not become brittle and crack when being cold in winter.
The purpose of the invention is realized by the following technical scheme:
a tiger-stripe-resistant high-heat-resistance automobile instrument board material comprises the following components in parts by weight:
the polypropylene mixture comprises three kinds of polypropylene with different melt indexes, namely polypropylene A, polypropylene B and polypropylene C, and consists of the following components in parts by weight;
10-20 parts of polypropylene A, and the balance of polypropylene B,
15-25 parts of polypropylene B, namely,
25-30 parts of polypropylene C
The toughening agent comprises the following components in parts by weight:
5-10 parts of olefin block copolymer,
5-10 parts of ethylene-propylene copolymer elastomer,
5-10 parts of ethylene-octene random copolymer elastomer.
Further, under the conditions of 230 ℃ and 2.16kg, the melt index of the polypropylene A is 5-20g/10min, the melt index of the polypropylene B is 25-50g/10min, and the melt index of the polypropylene C is 55-100g/10min; the notch impact strength of the polypropylene mixture is less than or equal to 15kJ/m 2 。
In a further scheme, the olefin block copolymer is an ethylene-octene block copolymer, and the glass transition temperature is below-60 ℃; the melt index of the ethylene-propylene copolymer elastomer is not less than 10g/10min at 230 ℃ and under the condition of 2.16kg; the ethylene-octene random copolymer elastomer has a melt index of not less than 10g/10min at 190 ℃ under the condition of 2.16 kg.
In a further scheme, the mineral powder is at least one of talcum powder, calcium carbonate, mica and wollastonite; further preferably, the particle size range of the mineral powder is 2-15 microns.
In a further embodiment, the dispersant is a mixture of fatty acid and fatty acid derivative, preferably TR451.
In a further scheme, the nucleating agent is sodium benzoate or phosphate nucleating agent.
In a further scheme, the heat-resistant auxiliary agent comprises a main antioxidant and an auxiliary antioxidant; wherein the primary antioxidant is selected from at least one of hindered phenol antioxidants or thioester antioxidants; the auxiliary antioxidant is at least one selected from phosphite or ester antioxidants; the light-resistant auxiliary agent is a hindered amine light stabilizer.
The invention also aims to provide a preparation method of the tiger-stripe-resistant high-heat-resistance automobile instrument board material, which comprises the following steps of:
(1) Weighing a polypropylene mixture, a toughening agent, mineral powder, a dispersing agent, a nucleating agent, a heat-resistant assistant and a light-resistant assistant according to a ratio, and putting the mixture into a high-speed mixer to mix for 3-5 minutes to obtain a mixture;
(2) Adding the mixture into a double-screw extruder for extrusion, wherein the length-diameter ratio of the double-screw extruder is 48, and the temperature of each section of the double-screw extruder is set within the range of 180-220 ℃;
(3) The product, namely the high heat-resistant automobile instrument panel material with tiger skin lines resistance is obtained by cooling, drying and granulating the extrudate of the double-screw extruder.
The third purpose of the invention is to provide the application of the tiger-stripe-resistant and high-heat-resistance automobile instrument board material in the production of automobile interior trim parts.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, by compounding polypropylene with different melt indexes, the material has a wider molecular weight distribution, the viscosity change of each part of a melt is slowed down and the material flows uniformly during injection molding of the material, and the phenomenon of tiger skin lines generated during injection molding of the material is effectively improved.
(2) The conventional elastomer melt is generally 0.5-5 g/10min, the flowability is poor, and the flow rate difference between the toughening agent and the polypropylene melt is large when the material is subjected to injection molding, so that the material is pushed forward in a gradient manner, and tiger skin stripes with alternate light and shade are generated. The invention adopts the high-fluidity ethylene-octene random copolymer elastomer, the fluidity of the elastomer is close to that of polypropylene, and the toughening agent and the polypropylene melt can be simultaneously pushed forward during the injection molding of the material, thereby effectively improving the tiger skin texture phenomenon generated during the injection molding of the material.
(3) The ethylene-propylene copolymer elastomer is added, the compatibility of a propylene chain segment and a polypropylene system in the elastomer is better, and the compatibility of an ethylene chain segment and a toughening agent is better. The addition of the ethylene-propylene copolymer elastomer enables the polypropylene and the toughening agent to be fused with each other, reduces the probability of uneven flow of materials, and effectively improves the phenomenon of tiger skin lines generated during material injection molding. Meanwhile, the uniform phase interface also enables the performance of the material to be more stable, the modulus to be higher and the toughness to be better.
(4) The added ethylene-octene block copolymer consists of a chain segment (hard segment) of crystallizable ethylene-octene with low comonomer content and high melting temperature and a chain segment (soft segment) of amorphous ethylene-octene with high comonomer content and low glass transition temperature, and the addition of the structural copolymer effectively improves the modulus and low-temperature toughness of the material.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The types and suppliers of reagents used in the following examples and comparative examples are merely illustrative of the sources and components of reagents used in the experiments of the present invention, and are fully disclosed, and do not indicate that the present invention cannot be practiced using other reagents of the same type or other suppliers; the original name and abbreviations of the manufacturers in the tables are as follows: the Korean SK group is SK for short; the Chinese petrochemical Yanshan petrochemical company is called Yanshan petrochemical for short; the Dow chemical company is called Dow chemistry for short; exxon meifu corporation, abbreviated exxon meifu; mitsui chemical company, for short Mitsui chemical; liaoning ai Hai Talc, inc. Liaoning ai Hai for short; shanghai Zhuang Jing chemical Co., ltd is called Zhuang Jing chemical for short; adico, japan; BASF corporation for BASF; cyanite is abbreviated as Cyanite by Cyanite chemical industries, ltd; wuhan Diyaka ethylene company Limited is abbreviated as Wuhan ethylene; zhonghai Shell petrochemical company Limited is called Zhonghai Shell for short.
The comprehensive performance of the material is judged by the numerical values of the melt index, the density, the tensile strength, the bending modulus, the notched impact strength of the cantilever beam and the heat distortion temperature. The pellets obtained in each of examples and comparative examples were injection-molded into ISO standard bars and then subjected to a performance test. The melting is carried out according to ISO 1133, and the test conditions are 230 ℃ and 2.16Kg; density was performed according to ISO 1183; the tensile strength was performed according to ISO 527, the test speed was 50mm/min, the splines were dumbbell-shaped, the spline size was 170mm x 10mm x 4mm; the flexural strength and flexural modulus were performed according to ISO 178, the test speed was 2mm/min, the splines were rectangular, the spline size was 80mm by 10mm by 4mm; the notched impact strength of the cantilever beam is performed according to ISO 180, and the notched impact strength of the cantilever beam at normal temperature (23 ℃) and low temperature (-30 ℃) is tested, wherein the sample strip is rectangular (a V-shaped molding notch), and the size of the sample strip is 80mm by 10mm by 4mm; the heat distortion temperature was performed according to ISO 75 under test conditions of 0.45MPa, rectangular specimens with dimensions of 80mm by 10mm by 4mm.
Example 1
According to the proportion in the table 1, the components are put into a high-speed mixer to be mixed for 3 minutes, then the mixture is added into a double-screw extruder to be extruded, the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: first zone 180 deg.C, second zone 190 deg.C, third zone 195 deg.C, fourth zone 200 deg.C, fifth zone 205 deg.C, sixth zone 210 deg.C, and head 215 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger stripes and high-heat-resistance automobile instrument panel material.
The product obtained in example 1 was tested for its properties according to the corresponding standards, the results of which are shown in Table 11.
Table 1 raw material type, manufacturer and addition part of example 1
| Starting materials | Type number | Manufacturer of the product | Number of parts |
| Polypropylene A | BX3500 | SK | 20 |
| Polypropylene B | BX3800 | SK | 25 |
| Polypropylene C | K7100 | Yanshan petrochemical | 30 |
| Olefin block copolymer | Infuse 9507 | Chemistry of Dow | 5 |
| Ethylene-propylene copolymer elastomer | VM6202 | Exxon Mobil | 5 |
| Ethylene-octene random copolymer elastomer | DF 8200 | Chemistry of three wells | 5 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 10 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.2 |
| Nucleating agent | NA-11 | Aidi's department | 0.2 |
| Primary antioxidant | 1330 | Basf-Fr | 0.2 |
| Auxiliary antioxidant | PS802FL | Basf et al | 0.2 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.2 |
Example 2
According to the proportion shown in the table 2, the components are put into a high-speed mixer to be mixed for 4 minutes, then the mixture is added into a double-screw extruder to be extruded, the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: the first zone is 185 ℃, the second zone is 190 ℃, the third zone is 195 ℃, the fourth zone is 200 ℃, the fifth zone is 205 ℃, the sixth zone is 215 ℃ and the head is 220 ℃. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger skin lines and high-heat-resistance automobile instrument panel material.
The product obtained in example 2 was tested for its properties according to the corresponding standards, the results of which are shown in Table 11.
Table 2 raw material types, manufacturers and parts added of example 2
Example 3
According to the proportion shown in the table 3, the components are put into a high-speed mixer to be mixed for 4 minutes, then the mixture is added into a double-screw extruder to be extruded, the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: 190 ℃ in the first zone, 200 ℃ in the second zone, 205 ℃ in the third zone, 210 ℃ in the fourth zone, 215 ℃ in the fifth zone, 220 ℃ in the sixth zone and 220 ℃ in the head. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger stripes and high-heat-resistance automobile instrument panel material.
The product obtained in example 3 was tested for its properties according to the corresponding standards, the results of which are shown in Table 11.
Table 3 raw material types, manufacturers and parts added of example 3
| Raw materials | Type number | Manufacturer(s) of | Number of copies |
| Polypropylene A | BX3500 | SK | 10 |
| Polypropylene B | BX3800 | SK | 22.5 |
| Polypropylene C | BX3920 | SK | 25 |
| Olefin block copolymers | Infuse 9077 | Dow's chemistry | 7.5 |
| Ethylene-propylene copolymer elastomer | VM6202 | Exxon Mobil | 10 |
| Ethylene-octene random copolymer elastomer | POE 8137 | Dow's chemistry | 5 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 20 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.4 |
| Nucleating agent | NA-11 | Aidi's department | 0.4 |
| Primary antioxidant | 1330 | Basf-Fr | 0.4 |
| Auxiliary antioxidant | PS802FL | Basf-Fr | 0.5 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.4 |
Example 4
According to the proportion in the table 4, the components are put into a high-speed mixer to be mixed for 5 minutes, and then the mixture is added into a double-screw extruder to be extruded, wherein the length-diameter ratio of the double-screw extruder is 48: first zone 180 deg.C, second zone 185 deg.C, third zone 190 deg.C, fourth zone 195 deg.C, fifth zone 200 deg.C, sixth zone 205 deg.C, and head 210 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger skin lines and high-heat-resistance automobile instrument panel material.
The product obtained in example 4 was tested for its properties according to the corresponding standards, and the test results are shown in Table 11.
Table 4 raw material type, manufacturer and addition part of example 4
| Raw materials | Type number | Manufacturer of the product | Number of parts |
| Polypropylene A | BX3500 | SK | 10 |
| Polypropylene B | BX3800 | SK | 15 |
| Polypropylene C | EP640V | Zhonghai shell brand | 25 |
| Olefin block copolymerizationPolymer | Infuse 9507 | Chemistry of Dow | 10 |
| Ethylene-propylene copolymer elastomer | VM6202 | Exxon Mobil | 7.5 |
| Ethylene-octene random copolymer elastomer | 8730L | SK | 7.5 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 25 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.5 |
| Nucleating agent | NA-11 | Aidi's department | 0.5 |
| Primary antioxidant | 1010 | Basf-Fr | 0.6 |
| Auxiliary antibodyOxygen agent | 168 | Basf-Fr | 0.6 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.5 |
Example 5
According to the proportion shown in the table 5, the components are put into a high-speed mixer to be mixed for 5 minutes, then the mixture is added into a double-screw extruder to be extruded, the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: first zone 180 deg.C, second zone 190 deg.C, third zone 195 deg.C, fourth zone 200 deg.C, fifth zone 205 deg.C, sixth zone 210 deg.C, and head 215 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger skin lines and high-heat-resistance automobile instrument panel material.
The product obtained in example 5 was tested for its properties according to the corresponding standards, the results of which are shown in Table 11.
TABLE 5 raw material type, manufacturer and parts added of example 5
| Raw materials | Type number | Manufacturer of the product | Number of parts |
| Polypropylene A | BX3500 | SK | 15 |
| Polypropylene B | BX3800 | SK | 20 |
| Polypropylene C | EP640V | Zhonghai shell brand | 25 |
| Olefin block copolymer | Infuse 9507 | Chemistry of Dow | 5 |
| Ethylene-propylene copolymer elastomer | VM6202 | Exxon Mobil | 5 |
| Ethylene-octene random copolymer elastomer | POE 8137 | Chemistry of Dow | 10 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 20 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.5 |
| Nucleating agent | NA-11 | Aidi's department | 0.5 |
| Primary antioxidant | 1076 | Basf et al | 0.6 |
| Auxiliary antioxidant | 168 | Basf-Fr | 0.6 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.5 |
Comparative example 1
According to the proportion in table 6, the components are put into a high-speed mixer to be mixed for 5 minutes, and then the mixture is added into a double-screw extruder to be extruded, wherein the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: the temperature of the first zone is 180 ℃, the temperature of the second zone is 190 ℃, the temperature of the third zone is 195 ℃, the temperature of the fourth zone is 200 ℃, the temperature of the fifth zone is 205 ℃, the temperature of the sixth zone is 210 ℃ and the temperature of the machine head is 215 ℃. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger stripes and high-heat-resistance automobile instrument panel material.
The product obtained in comparative example 1 was tested for its properties according to the corresponding standards, and the results are shown in Table 12.
TABLE 6 raw material type, manufacturer and addition part of comparative example 1
Comparative example 2
According to the proportion in table 7, the components are put into a high-speed mixer to be mixed for 5 minutes, and then the mixture is added into a double-screw extruder to be extruded, wherein the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: first zone 180 deg.C, second zone 190 deg.C, third zone 195 deg.C, fourth zone 200 deg.C, fifth zone 205 deg.C, sixth zone 210 deg.C, and head 215 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger skin lines and high-heat-resistance automobile instrument panel material.
The product obtained in comparative example 2 was tested for its properties according to the corresponding standards, the results of which are shown in Table 12.
TABLE 7 raw material type, manufacturer and addition part of comparative example 2
| Starting materials | Model number | Manufacturer of the product | Number of copies |
| Polypropylene A | BX3500 | SK | 15 |
| Polypropylene B | BX3800 | SK | 20 |
| Polypropylene C | EP640V | Zhonghai shell brand | 25 |
| Olefin block copolymers | —— | —— | 0 |
| Ethylene-propylene copolymer elastomer | VM6202 | Exxon Mobil | 10 |
| Ethylene-octene random copolymer elastomer | POE 8137 | Chemistry of Dow | 10 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 20 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.5 |
| Nucleating agent | NA-11 | Adeca's family | 0.5 |
| Primary antioxidant | 1010 | Basf-Fr | 0.6 |
| Secondary antioxidant | 168 | Basf et al | 0.6 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.5 |
Comparative example 3
According to the proportion in table 8, the components are put into a high-speed mixer to be mixed for 5 minutes, and then the mixture is added into a double-screw extruder to be extruded, wherein the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: first zone 180 deg.C, second zone 190 deg.C, third zone 195 deg.C, fourth zone 200 deg.C, fifth zone 205 deg.C, sixth zone 210 deg.C, and head 215 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger skin lines and high-heat-resistance automobile instrument panel material.
The product obtained in comparative example 3 was tested for its properties according to the corresponding standards, the results of which are shown in Table 12.
TABLE 8 raw material type, manufacturer and addition part of comparative example 3
| Starting materials | Model number | Manufacturer(s) of | Number of parts |
| Polypropylene A | BX3500 | SK | 15 |
| Polypropylene B | BX3800 | SK | 20 |
| Polypropylene C | EP640V | Zhonghai shell brand | 25 |
| Olefin block copolymer | Infuse 9507 | Chemistry of Dow | 10 |
| Ethylene-propyleneOlefin copolymer elastomer | —— | —— | 0 |
| Ethylene-octene random copolymer elastomer | POE 8137 | Chemistry of Dow | 10 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 20 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.5 |
| Nucleating agent | NA-11 | Aidi's department | 0.5 |
| Primary antioxidant | 1010 | Basf-Fr | 0.6 |
| Auxiliary antioxidant | 168 | Basf-Fr | 0.6 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.5 |
Comparative example 4
According to the proportion in table 9, the components are put into a high-speed mixer to be mixed for 5 minutes, and then the mixture is added into a double-screw extruder to be extruded, wherein the length-diameter ratio of the double-screw extruder is 48: first zone 180 deg.C, second zone 190 deg.C, third zone 195 deg.C, fourth zone 200 deg.C, fifth zone 205 deg.C, sixth zone 210 deg.C, and head 215 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger stripes and high-heat-resistance automobile instrument panel material.
The product obtained in comparative example 4 was tested for its properties according to the corresponding standards, and the results are shown in Table 12.
TABLE 9 raw material type, manufacturer and addition part of comparative example 4
| Raw materials | Model number | Manufacturer(s) of | Number of parts |
| Polypropylene A | —— | —— | |
| Polypropylene B | BX3800 | SK | 60 |
| Polypropylene C | —— | —— | |
| Olefin block copolymer | Infuse 9507 | Dow's chemistry | 5 |
| Ethylene-propylene copolymer elastomer | VM6202 | Exxon Mobil | 5 |
| Ethylene-octene random copolymer elastomer | POE 8137 | Chemistry of Dow | 10 |
| Mineral powder | AH51210 | Ai Hai Liao Ning | 20 |
| Dispersing agent | TR451 | Chemical engineering for strengthening scene | 0.5 |
| Nucleating agent | NA-11 | Aidi's department | 0.5 |
| Primary antioxidant | 1010 | Basf et al | 0.6 |
| Secondary antioxidant | 168 | Basf et al | 0.6 |
| Light-resistant auxiliary | 3808PP5 | Cyanamide | 0.5 |
Comparative example 5
According to the proportion in table 10, the components are put into a high-speed mixer to be mixed for 5 minutes, and then the mixture is added into a double-screw extruder to be extruded, wherein the length-diameter ratio of the double-screw extruder is 48, and the temperatures of all sections of a charging barrel of the double-screw extruder are respectively set as follows: first zone 180 deg.C, second zone 190 deg.C, third zone 195 deg.C, fourth zone 200 deg.C, fifth zone 205 deg.C, sixth zone 210 deg.C, and head 215 deg.C. And cooling the extruded strips to room temperature through a circulating water tank, drying the extruded strips by a blower, and then granulating the extruded strips in a granulator to obtain the anti-tiger skin lines and high-heat-resistance automobile instrument panel material.
The product obtained in comparative example 4 was tested for its properties according to the corresponding standards, and the results are shown in Table 12.
TABLE 10 raw material type, manufacturer and addition part of comparative example 5
TABLE 11 results of performance testing of products prepared in examples
Table 12 results of performance test of products prepared by comparative examples
It can be seen from examples 1-5 and comparative examples 1-5 that the invention effectively improves the tiger skin texture phenomenon of the material during injection molding by the compound use of polypropylene with different fluidity, and meanwhile, the use of the specific toughening agent and nucleating agent in the invention ensures that the material of the invention has better heat resistance, higher modulus at normal temperature and better toughness at low temperature, and the instrument panel produced by using the material does not deform and collapse when the material is hot in summer and does not become brittle and crack when the material is cold in winter.
The embodiments described above are intended to facilitate a person skilled in the art to understand and use the invention. 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 embodiments described herein, 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 (8)
1. The utility model provides an anti tiger's skin line, high heat-resisting motormeter plate material which characterized in that: the composition comprises the following components in parts by weight:
50 to 75 parts of a polypropylene mixture,
15 to 25 parts of a toughening agent,
10 to 25 parts of mineral powder,
0.2 to 0.5 portion of dispersant,
0.2 to 0.5 portion of nucleating agent,
0.4 to 1.2 portions of heat-resistant auxiliary agent,
0.2 to 0.5 portion of light-resistant auxiliary agent,
the polypropylene mixture comprises three kinds of polypropylene with different melt indexes, namely polypropylene A, polypropylene B and polypropylene C, and consists of the following components in parts by weight;
10-20 parts of polypropylene A, and the balance of polypropylene B,
15-25 parts of polypropylene B, namely,
25-30 parts of polypropylene C, 25-30 parts of polypropylene,
under the conditions of 230 ℃ and 2.16kg, the melt index of the polypropylene A is 5-20g/10min, the melt index of the polypropylene B is 25-50g/10min, and the melt index of the polypropylene C is 55-100g/10min; the notched impact strength of the polypropylene mixture is less than or equal to 15kJ/m 2 ；
The toughening agent comprises the following components in parts by weight:
5-10 parts of olefin block copolymer,
5-10 parts of ethylene-propylene copolymer elastomer,
5-10 parts of ethylene-octene random copolymer elastomer;
the olefin block copolymer is an ethylene-octene block copolymer, and the glass transition temperature is below-60 ℃; the melt index of the ethylene-propylene copolymer elastomer is not less than 10g/10min at 230 ℃ and under the condition of 2.16kg; the ethylene-octene random copolymer elastomer has a melt index of not less than 10g/10min at 190 ℃ under 2.16 kg.
2. The tiger stripe resistant, high heat resistant automotive instrument panel material of claim 1, wherein: the mineral powder is at least one of talcum powder, calcium carbonate, mica and wollastonite.
3. The tiger stripe resistant, high heat resistant automotive dashboard material of claim 1, wherein: the particle size range of the mineral powder is 2 to 15 micrometers.
4. The tiger stripe resistant, high heat resistant automotive dashboard material of claim 1, wherein: the dispersant is a mixture of fatty acids and fatty acid derivatives.
5. The tiger stripe resistant, high heat resistant automotive instrument panel material of claim 1, wherein: the nucleating agent is sodium benzoate or phosphate nucleating agent.
6. The tiger stripe resistant, high heat resistant automotive dashboard material of claim 1, wherein: the heat-resistant auxiliary agent comprises a main antioxidant and an auxiliary antioxidant; wherein the primary antioxidant is selected from at least one of hindered phenol antioxidants or thioester antioxidants; the auxiliary antioxidant is at least one selected from phosphite or ester antioxidants; the light-resistant auxiliary agent is a hindered amine light stabilizer.
7. The method for preparing a tiger stripe-resistant high heat-resistant automobile instrument panel material as set forth in any one of claims 1 to 6, which comprises the steps of:
(1) Weighing a polypropylene mixture, a toughening agent, mineral powder, a dispersing agent, a nucleating agent, a heat-resistant assistant and a light-resistant assistant according to a ratio, and putting the mixture into a high-speed mixer to mix for 3 to 5 minutes to obtain a mixture;
(2) Adding the mixture into a double-screw extruder for extrusion, wherein the length-diameter ratio of the double-screw extruder is 48, and the temperature of each section of the double-screw extruder is set within the range of 180-220 ℃;
(3) And (3) cooling, drying and granulating the extrudate of the double-screw extruder to obtain the product, namely the tiger-skin-resistant high-heat-resistance automobile instrument panel material.
8. Use of the tiger stripe-resistant, highly heat-resistant automotive instrument panel material of any one of claims 1 to 6 in the production of automotive interior parts.
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| CN114044977A (en) * | 2021-12-24 | 2022-02-15 | 广州仕天材料科技有限公司 | Anti-tiger stripe polypropylene composite material and preparation method and application thereof |
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