CN114292576B - TPO (thermoplastic polyolefin) multicolor automotive interior material and preparation method thereof - Google Patents

TPO (thermoplastic polyolefin) multicolor automotive interior material and preparation method thereof Download PDF

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CN114292576B
CN114292576B CN202111621980.3A CN202111621980A CN114292576B CN 114292576 B CN114292576 B CN 114292576B CN 202111621980 A CN202111621980 A CN 202111621980A CN 114292576 B CN114292576 B CN 114292576B
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tpo
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automotive interior
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CN114292576A (en
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郭嘉
朱梦琳
任仲伟
李超
高金岗
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Suzhou Rui High Tech Materials Co ltd
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Suzhou Greentech Co ltd
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Abstract

The application relates to the technical field of automotive interior materials, and particularly discloses a TPO (thermoplastic polyolefin) multicolor automotive interior material and a preparation method thereof. The automotive interior material comprises a surface treatment layer, a colorful surface layer, a TPO film layer, a PP Foam layer and a back treatment layer; the preparation method comprises the following steps: preparing water-based polyurethane slurry, a TPO film layer, multicolor slurry and polypropylene slurry, coating the polypropylene slurry on the surface of the TPO film layer, drying to obtain a PP Foam layer, coating the water-based polyurethane slurry on the PP Foam layer, drying to obtain a back treatment layer, coating the multicolor slurry on one surface of the TPO film layer far away from the PP Foam layer, drying to obtain an multicolor surface layer, coating the water-based polyurethane slurry on the multicolor surface layer, and drying to obtain a surface treatment layer, thereby obtaining the TPO multicolor automotive interior material. The TPO multicolor automotive interior material has the advantage that the automotive interior shows the multicolor effect through the synergistic effect of the raw materials.

Description

TPO (thermoplastic polyolefin) multicolor automotive interior material and preparation method thereof
Technical Field
The application relates to the technical field of automotive interior materials, in particular to a TPO (thermoplastic polyolefin) multicolor automotive interior material and a preparation method thereof.
Background
With the development of science and technology and the progress of society, automobiles appear more and more frequently. The automobile is not only a tool for people to take a walk for commuting, but also the time for people to play activities is gradually increased, the time occupation ratio of people in the automobile is also gradually increased, and therefore, the demand of people for the interior of the automobile is more and more. People not only require comfort level of the interior of the automobile, but also require the design of the appearance and the interior of the automobile.
At present, automotive interior material generally includes surface course, TPO rete, PP Foam layer, and the surface course sets firmly the surface at the TPO rete, and PP Foam layer sets firmly the one side of keeping away from surface course TPO rete at the surface course. When the front surface of the surface layer is illuminated, different colors can be shown, however, as the surface layer is directly exposed in the natural environment, the surface of the surface layer is damaged along with the increase of the using time, and the surface layer is easy to fade.
Disclosure of Invention
In order to improve the color fastness to rubbing of the automotive interior material, the application provides a TPO multicolor automotive interior material and a preparation method thereof.
In a first aspect, the present application provides a TPO multicolor automotive interior material, which adopts the following technical scheme:
the TPO multicolor automotive interior material sequentially comprises a surface treatment layer, a multicolor surface layer, a TPO film layer, a PP Foam layer and a back treatment layer from top to bottom, wherein the surface treatment layer and the back treatment layer are both aqueous polyurethane layers;
the waterborne polyurethane layer comprises the following raw materials in parts by weight: 50-75 parts of aqueous polyurethane dispersoid, 1-5 parts of silicon dioxide, 0.2-3.2 parts of acrylic acid alkali swelling thickener, 0.2-2.5 parts of curing agent and 10-40 parts of water;
the colorful surface layer comprises the following raw materials in parts by weight: 65-95 parts of modified epoxy acrylate, 12-35 parts of pearl powder, 6-15 parts of titanium dioxide, 2-6 parts of dicyclopentenyl acrylate, 1-5 parts of ethylene glycol phenyl ether, 1-5 parts of photoinitiator and 15-35 parts of water, wherein the modified epoxy acrylate is prepared by modifying epoxy acrylate with quartz powder;
the TPO membrane layer comprises the following raw materials in parts by weight: 85-100 parts of modified TPO particles, 0.3-9 parts of auxiliary agent and 0.5-7 parts of pigment.
The PP Foam layer is made of a polypropylene foaming material.
Further, the modified epoxy acrylate is prepared by the following method: adding acetone into quartz powder, performing ultrasonic dispersion for 30-50min under the power of 180 plus 210W, adding epoxy acrylate, performing ultrasonic dispersion for 30-50min under the power of 180 plus 210W, adding m-phenylenediamine, stirring for 15-20min to obtain a mixture, and then curing the mixture at the temperature of 80-90 ℃ for 4-6h to obtain modified epoxy acrylate;
wherein, the addition amount of acetone in 1kg of quartz powder is 3-5L, and the weight ratio of epoxy acrylate, quartz powder and m-phenylenediamine is (11-12): (6-8): (3-4).
By adopting the technical scheme, the TPO multicolor automotive interior material can enable the automotive interior material to have excellent rubbing color fastness, light color fastness and wear resistance through the synergistic effect of the raw materials, so that the automotive interior can present different colors from different angles, and the personalized requirements of people on the automotive interior can be conveniently met, wherein the rubbing color fastness is 4-6 grade, the light color fastness is 4-6 grade, and the wear resistance is free from obvious damage and peeling.
The surface treatment layer and the back treatment layer can protect the internal layer structure, reduce friction damage and improve wear resistance and color fastness. The surface treatment layer and the back treatment layer are both aqueous polyurethane layers, the mechanical strength of the aqueous polyurethane layers is good, the wear resistance of the aqueous polyurethane layers is improved, and the protection effect on the colorful surface layer is further enhanced.
The main component of the quartz powder is silicon dioxide, the silicon dioxide has strong wear resistance, and the wear resistance of the epoxy acrylate can be enhanced by modifying the quartz powder, so that the rubbing color fastness of the colorful surface layer is improved, and the automobile interior material presents different colors from the front. The dicyclopentenyl acrylate is a cross-linking agent and can be cross-linked with the epoxy acrylate to form a net structure of the epoxy acrylate, so that the adhesive force of the multicolor slurry on the TPO film is improved, and the color fastness to friction of the multicolor surface layer is improved.
The pearl powder can not only present the glittering effect of the metallic pigment, but also can generate the soft color of the natural pearl, when the pearl powder is irradiated by sunlight, multi-level reflection can be generated, the reflected light interacts to present colorful colors, and when the pearl powder is applied to the raw materials of the colorful surface layer, the automobile interior material can present more colors. The titanium dioxide is applied to the raw materials of the colorful surface layer, can show more bright colors together with the pearl powder, not only can play a role in covering flaws, but also can improve the performance of the colorful surface layer, and can improve the light fastness, the adhesive force and the aging resistance of the colorful surface layer, thereby improving the light fastness of the colorful surface layer. The ethylene glycol phenyl ether is used as a film forming auxiliary agent, and can facilitate the rapid film forming of the multicolor surface layer.
The TPO film layer is made of modified TPO particles, auxiliaries and pigments, and is beneficial to improving mechanical properties and increasing wear resistance. The PP Foam layer is a polypropylene Foam material, has excellent mechanical property, durability and environmental protection, and can protect the TPO film layer.
Preferably, the method comprises the following steps: the waterborne polyurethane layer comprises the following raw materials in parts by weight: 55-70 parts of aqueous polyurethane dispersoid, 2-3 parts of silicon dioxide, 0.5-2.5 parts of acrylic acid alkali swelling thickener, 0.5-1.5 parts of curing agent and 15-35 parts of water;
the colorful surface layer comprises the following raw materials in parts by weight: 70-85 parts of modified epoxy acrylate, 16-32 parts of pearl powder, 8-12 parts of titanium dioxide, 3-5 parts of dicyclopentenyl acrylate, 2-4 parts of ethylene glycol phenyl ether, 2-4 parts of photoinitiator and 20-30 parts of water; the TPO membrane layer comprises the following raw materials in parts by weight: 92-98 parts of modified TPO particles, 0.9-3.9 parts of auxiliary agent and 1-4 parts of pigment.
By adopting the technical scheme, the color fastness to rubbing of the multicolor surface layer can be conveniently improved by optimizing the mixing amount of the raw materials.
Preferably, the method comprises the following steps: the weight ratio of the pearl powder to the modified epoxy acrylate is 1: (5-8).
The addition amount of the pearl powder is too small, so that the multicolor surface layer can not present more excellent colors; the addition amount of the pearl powder is too much, so that the pearl powder cannot be well mixed with the modified epoxy acrylate, the dispersion is not uniform, and the colorful color cannot be better presented. By adopting the technical scheme, when the weight ratio of the pearl powder to the modified epoxy acrylate is in the range, the colorful surface layer can show different colors from the front.
Preferably, the method comprises the following steps: the quartz powder is pretreated by adopting a silane coupling agent before use.
Further, the quartz powder is pretreated by adopting the following method: putting gamma-glycidoxypropyltrimethoxysilane into an acetic acid solution, stirring for 15-20min to obtain a mixture, then adding quartz powder into the mixture, stirring for 20-30min, standing at 60-80 ℃ for 4-6h, filtering, washing the solid for 3-5 times, and drying the solid at 50-60 ℃ for 40-60min to obtain pretreated quartz powder;
wherein the addition amount of the gamma-glycidoxypropyltrimethoxysilane is 4-6 wt% of the quartz powder, the addition amount of acetic acid solution in each 1kg of the gamma-glycidoxypropyltrimethoxysilane is 6-8L, and the mass fraction of the acetic acid solution is 30-40%.
By adopting the technical scheme, the quartz powder has good hydrophilicity, but has poor compatibility with epoxy acrylate. The silane coupling agent is utilized to pretreat the quartz powder, so that the compatibility of the quartz powder and the epoxy acrylic acid can be improved, and the quartz powder is better dispersed in the epoxy acrylate, thereby better enhancing the wear resistance of the colorful surface layer and improving the color fastness to friction of the colorful surface layer. Specifically, the silane coupling agent can be hydrolyzed in water to generate silanol groups, and the silanol groups can be combined with silicon dioxide in quartz powder to form a homogeneous system, so that the surface energy of the quartz powder is reduced, the quartz powder has good affinity with epoxy acrylate, and the compatibility of the quartz powder and the epoxy acrylate is improved.
Preferably, the method comprises the following steps: the titanium dioxide is pretreated by adopting alumina before use.
Further, the titanium dioxide is pretreated by adopting the following method: putting titanium dioxide into water, stirring for 15-25min to obtain a mixture, adding alumina into the mixture, stirring for 10-20min, adjusting the pH to 8.5 by using a sodium hydroxide solution, curing at 70-90 ℃ for 2-3h, filtering, and drying at 30-50 ℃ for 1-3h to obtain pretreated titanium dioxide;
wherein, the addition amount of water in every 1kg of titanium dioxide is 3-4L, and the addition amount of alumina is 4-6 wt% of the titanium dioxide.
By adopting the technical scheme, the titanium dioxide has poor dispersibility and poor compatibility with epoxy acrylate. The titanium dioxide is pretreated by using the aluminum oxide, and the aluminum ions are added into the multicolor surface layer, so that the metallic luster and the glittering sensation of the multicolor surface layer can be enhanced, and the multicolor surface layer can conveniently show different colors from the front.
Preferably, the method comprises the following steps: the modified TPO particles are prepared by modifying the TPO particles by adopting silica.
Further, modified TPO pellets were prepared using the following method: melting TPO granules and silica at the temperature of 125-140 ℃, adding 3-5kg of sodium hexametaphosphate, stirring for 20-30min, then extruding and granulating to obtain modified TPO granules, wherein the weight ratio of the TPO granules to the silica is 1: (0.5-0.7).
Through adopting above-mentioned technical scheme, the silica cost is lower, and TPO granule cost is higher, utilizes the silica to modify TPO granule, not only can reduce cost, can also improve the wear resistance of TPO granule to improve the colour fastness to rubbing.
Preferably, the method comprises the following steps: the auxiliary agent comprises a light stabilizer, an antioxidant and a flame retardant, and the weight ratio of the light stabilizer to the antioxidant to the flame retardant is 1:1: 1.
Preferably, the method comprises the following steps: the light stabilizer is a hindered amine light stabilizer, the antioxidant is an amine antioxidant, and the flame retardant is an inorganic flame retardant.
By adopting the technical scheme, the light stabilizer, the antioxidant and the flame retardant are applied to the raw materials of the TPO film layer, so that the light resistance, the wear resistance and the flame retardance of the automotive interior material can be enhanced, and the practicability of the automotive interior material is enhanced.
In a second aspect, the present application provides a preparation method of a TPO multicolor automotive interior material, which adopts the following technical scheme: a preparation method of TPO multicolor automotive interior material comprises the following steps:
mixing the aqueous polyurethane dispersion, silicon dioxide and water, stirring for 25-35min, adding an acrylic acid-alkali swelling thickener and a curing agent, and stirring for 10-15min to obtain aqueous polyurethane slurry;
mixing the modified epoxy acrylate, the dicyclopentenyl acrylate, the photoinitiator and water, stirring for 25-40min to obtain a mixture, adding the pearl powder and the titanium dioxide into the mixture, stirring for 5-10min, adding the ethylene glycol phenyl ether, and stirring for 5-10min to obtain a magic color slurry;
melting the polypropylene foaming material at the temperature of 170-220 ℃ to obtain polypropylene slurry;
s1: melting the modified TPO particles at the temperature of 130-140 ℃, adding the auxiliary agent and the pigment for mixing, stirring for 20-35min, extruding, pressing into a film with the thickness of 0.4-0.6mm, and drying at the temperature of 60-80 ℃ for 3-5h to obtain a TPO film layer;
s2: uniformly coating polypropylene slurry on the surface of the TPO film layer, and drying at the temperature of 70-80 ℃ for 25-45min to form a PP Foam layer; uniformly coating the surface of the PP Foam layer, which is far away from the TPO film layer, with water-based polyurethane slurry, drying at the temperature of 60-80 ℃ for 30-50min to form a back treatment layer, uniformly coating the multicolor slurry on the surface of the TPO film layer, which is far away from the PP Foam layer, drying at the temperature of 60-80 ℃ for 30-50min to form a multicolor surface layer, so as to obtain a TPO multicolor base material and obtain a semi-finished product; uniformly coating the surface of the TPO multicolor substrate far away from the TPO film layer with water-based polyurethane slurry, and drying at the temperature of 70-90 ℃ for 20-30min to form a surface treatment layer; obtaining the TPO multicolor automobile interior material.
By adopting the technical scheme, the waterborne polyurethane slurry, the multicolor slurry, the TPO film layer and the polypropylene slurry are firstly prepared and then coated, so that the raw materials of all layers are mixed more uniformly, and the improvement of the color fastness to rubbing is facilitated.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the application, the epoxy acrylate is modified by the quartz powder, and then the pearl powder and the titanium dioxide are adopted, so that the rubbing color fastness and the light fastness of the colorful surface layer are enhanced, the automobile interior can show colorful colors from the front, the rubbing color fastness can reach 6 levels, the light fastness reaches 6 levels, and the surface is not obviously damaged or peeled.
2. In the application, the silane coupling agent is preferably adopted to pretreat the quartz powder, so that the dispersibility of the quartz powder can be enhanced, the compatibility of the quartz powder and the modified epoxy acrylate can be enhanced, the wear resistance and the wear-resistant color fastness of the multicolor surface layer are enhanced, the rubbing color fastness can reach 6 levels, the light-resistant color fastness reaches 6 levels, and the surface is not obviously damaged or peeled off.
Detailed Description
The present application is described in further detail below with reference to specific contents.
Raw materials
The epoxy acrylate is selected from Suzhou Sen Fida chemical company; the average particle size of the pearl powder is 10 μm, and is selected from Ningbo Posth materials science and technology Co., Ltd; the average particle size of the titanium dioxide is 10 μm, and is selected from Hangzhou Hengge nanotechnology limited company; the dicyclopentenyl acrylate is selected from chemical material of Sanwang, Guangzhou; the ethylene glycol phenyl ether is selected from Jiangsu Jiafeng chemical company, Inc.; the photoinitiator is 2,4, 6-trimethyl benzoyl ethyl phosphonate and is selected from Henan Tianfu chemical company, Ltd; the m-phenylenediamine is selected from Nanjing Guang Jun chemical industry Co.Ltd; the gamma-glycidyl ether oxypropyl trimethoxy silane is selected from Jeccard chemical Co., Ltd, Hangzhou; the quartz powder has an average particle diameter of 15 μm and is selected from Kogyangshentai mining Co., Ltd; TPO particle is selected from New Material Co., Ltd, of Dongguan city, Xinrui; the aqueous polyurethane dispersion is selected from the new material of unicin, Guangzhou; the acrylic acid alkali swelling thickener is selected from Guandong Nanhui New Material Co; the curing agent is toluene diisocyanic acid vinegar and is selected from Shenzhen Shang sourced Biotech limited company; the light stabilizer is 292 selected from Qingdao Euglean functional materials science and technology limited; the antioxidant is diphenylamine and is selected from Suzhou Kaifa new material science and technology company; the flame retardant is aluminum hydroxide, the pigment is iron oxide 722R water-soluble black inorganic pigment, and is selected from Orminum iron oxide pigment factory in the Luquan area; the polypropylene foaming material is an EPP foaming polypropylene material, has the characteristics of light weight, heat insulation, buffering, insulation, corrosion prevention and the like, and is selected from the technical limited company of new materials for plastic and fertilizer combination.
Preparation example
Preparation example 1
A modified epoxy acrylate is prepared by the following method:
adding 28L of acetone into 7kg of quartz powder, carrying out ultrasonic dispersion for 40min under the power of 195W, adding 11.5kg of epoxy acrylate, carrying out ultrasonic dispersion for 40min under the power of 195W, adding 3.5kg of m-phenylenediamine, stirring for 17min to obtain a mixture, and then curing the mixture at the temperature of 85 ℃ for 5h to obtain the modified epoxy acrylate.
Preparation example 2
A modified TPO particle made by the process of:
10kg of TPO granules and 6kg of silica are put at the temperature of 135 ℃ for melting, 4kg of sodium hexametaphosphate is added, the mixture is stirred for 25min, and then the mixture is extruded and granulated to obtain the modified TPO granules.
Examples
Example 1
The TPO multicolor automobile interior material comprises the raw materials in the proportion shown in Table 1.
Wherein, the modified epoxy acrylate is prepared by the preparation example 1, and the modified TPO particles are prepared by the preparation example 2.
A preparation method of TPO multicolor automobile interior material comprises the following steps:
mixing the aqueous polyurethane dispersion, silicon dioxide and water, stirring for 30min, adding an acrylic acid-alkali swelling thickener and a curing agent, and stirring for 17min to obtain aqueous polyurethane slurry;
mixing the modified epoxy acrylate, the dicyclopentenyl acrylate, the photoinitiator and water, stirring for 32min to obtain a mixture, adding the pearl powder and the titanium dioxide into the mixture, stirring for 7min, adding the ethylene glycol phenyl ether, and stirring for 7min to obtain a magic color slurry; melting the polypropylene foaming material at the temperature of 195 ℃ to obtain polypropylene slurry;
s1: melting the modified TPO particles at 135 ℃, adding the auxiliary agent and the black pigment, mixing, stirring for 28min, extruding, pressing into a 0.5mm film, and drying at 70 ℃ for 4h to obtain a TPO film layer;
s2: uniformly coating polypropylene slurry on the surface of the TPO film layer, and drying at the temperature of 75 ℃ for 35min to form a PP Foam layer with the thickness of 0.3 mm; uniformly coating the surface of the PP Foam layer, which is far away from the TPO film layer, with water-based polyurethane slurry, drying at the temperature of 70 ℃ for 40min to form a back treatment layer with the thickness of 0.10mm, uniformly coating the multicolor slurry on the surface of the TPO film layer, which is far away from the PP Foam layer, drying at the temperature of 70 ℃ for 40min to form a multicolor surface layer with the thickness of 0.12mm, and obtaining a TPO multicolor base material to obtain a semi-finished product; uniformly coating the surface of the TPO multicolor substrate far away from the TPO film layer with water-based polyurethane slurry, and drying at the temperature of 80 ℃ for 25min to form a surface treatment layer with the thickness of 0.10 mm; obtaining the TPO multicolor automobile interior material.
Examples 2 to 5
The TPO multicolor automobile interior material is different from the material ratio of the example 1, and the material ratio is shown in the table 1.
TABLE 1 EXAMPLES 1-5TPO magic color automobile interior materials mixing amount (unit: kg)
Figure BDA0003437823680000061
Figure BDA0003437823680000071
Examples 6 to 9
The TPO multicolor automobile interior material is different from the TPO multicolor automobile interior material in the raw material ratio shown in the table 2.
TABLE 2 examples 6-9TPO magic color automobile interior materials mixing amount (unit: kg)
Figure BDA0003437823680000072
Examples 10 to 13
A TPO multicolor automotive interior material is different from that of example 7 in the raw material ratio shown in Table 3.
TABLE 3 examples 10-13TPO magic color automobile interior materials mixing amount (unit: kg)
Figure BDA0003437823680000081
Example 14
A TPO multicolor automotive interior material, which is different from example 11 in that quartz powder in the multicolor automotive interior material was pretreated before use by the following method:
putting gamma-glycidoxypropyltrimethoxysilane into an acetic acid solution with the mass fraction of 35%, stirring for 17min to obtain a mixture, then adding quartz powder into the mixture, stirring for 25min, then standing for 5h at the temperature of 70 ℃, then filtering, washing the solid with water for 4 times, and drying the solid at the temperature of 40 ℃ for 50min to obtain pretreated quartz powder; wherein the addition amount of the gamma-glycidoxypropyltrimethoxysilane is 5 wt% of the quartz powder, and the addition amount of acetic acid solution in 1kg of the gamma-glycidoxypropyltrimethoxysilane is 7L.
Example 15
The TPO multicolor automobile interior material is different from the embodiment 14 in that the titanium white in the multicolor automobile interior material is pretreated by the following method before use:
putting titanium dioxide into water, stirring for 20min to obtain a mixture, adding alumina into the mixture, stirring for 15min, adjusting the pH to 8.5 by using a sodium hydroxide solution, curing at the temperature of 80 ℃ for 2.5h, filtering, and drying at the temperature of 40 ℃ for 2h to obtain pretreated titanium dioxide; wherein, the addition amount of water in every 1kg of titanium dioxide is 3.5L, and the addition amount of alumina is 5 wt% of the titanium dioxide.
Comparative example
Comparative example 1
A TPO multicolor automotive interior material is different from the material in example 1 in that the same amount of epoxy acrylate is used to replace the modified epoxy acrylate.
Comparative example 2
The TPO multicolor automobile interior material is different from the embodiment 1 in that titanium dioxide is not added in the raw material of the multicolor surface layer of the multicolor automobile interior material.
Comparative example 3
A TPO multicolor automobile interior material is different from the example 1 in that silica is not added to the raw material of the water-based polyamide ester layer of the multicolor automobile interior material.
Comparative example 4
A TPO fantasy color automotive interior material, which is different from example 1 in that the modified TPO particles are replaced with the same amount of TPO particles in the raw material of the TPO film layer of the fantasy color automotive interior material.
Performance test
The semi-finished products prepared in examples 1 to 15 and comparative examples 1 to 4 were used as test specimens, and the following property tests were carried out:
rubbing fastness: the results of measuring the rubbing fastness of the automobile interior material according to QB/T2537-2001, reciprocating rubbing fastness of leather color fastness test, are shown in Table 4.
Color fastness to light: according to QB/T2727-2005, leather color fastness to light test: xenon arc "was used to measure the light fastness of the automotive interior material, and the measurement results are shown in table 4.
Wear resistance: the abrasion resistance of the automobile interior material was measured according to QB/T2726-2005, "measurement of abrasion resistance in physical and mechanical leather tests", and the results are shown in Table 4.
TABLE 4 test results
Figure BDA0003437823680000091
Figure BDA0003437823680000101
Note: the higher the level of the rubbing color fastness and the light fastness is, the higher the color fastness is, and the more stable the color is.
The automotive interior material has the advantages that the automotive interior material has excellent color fastness to rubbing, color fastness to light and wear resistance through the synergistic effect of the raw materials, so that the automotive interior can show different colors from the front, wherein the color fastness to rubbing is 4-6 grade, the color fastness to light is 4-6 grade, and the wear resistance is that the surface is not obviously damaged or peeled.
Combining example 1 and comparative example 1, it can be seen that the color fastness to rubbing in example 1 is grade 4, the color fastness to light is grade 4, the surface has no obvious damage or peeling, and the color fastness to light is better than that in comparative example 1, which indicates that the epoxy acrylate in the automotive interior material is more suitable for modification, and the color fastness to rubbing, the color fastness to light and the wear resistance of the automotive interior material can be enhanced.
Combining the example 1 and the comparative example 2, it can be seen that the rubbing color fastness in the example 1 is grade 4, the light color fastness is grade 4, the surface has no obvious damage and peeling, and the comparison example 2 is superior, which indicates that the addition of titanium dioxide in the automotive interior material is more suitable, and the rubbing color fastness, the light color fastness and the wear resistance of the automotive interior material can be enhanced.
Combining example 1 and comparative example 3, it can be seen that the rubbing color fastness in example 1 is grade 4, the light color fastness is grade 4, the surface has no obvious damage and peeling, and is better than that in comparative example 3, which indicates that the addition of silica to the automotive interior material is more suitable for enhancing the rubbing color fastness, the light color fastness and the wear resistance of the automotive interior material.
Combining example 1 and comparative example 4, it can be seen that the color fastness to rubbing in example 1 is grade 4, the color fastness to light is grade 4, the surface has no obvious damage and peeling, and is better than that in comparative example 3, which indicates that the modification of TPO particles in the automotive interior material is more suitable, and the color fastness to light and the wear resistance of the automotive interior material can be enhanced.
As can be seen by combining examples 1-5, the color fastness to rubbing in example 3 is grade 5, the color fastness to light is grade 5, and the surface is not obviously damaged or peeled, which is better than other examples, and shows that the addition amount of the modified epoxy acrylate in example 3 is more suitable, and the color fastness to rubbing, the color fastness to light and the wear resistance of the automotive interior material can be enhanced.
It can be seen from the combination of examples 6 to 9 that the rubbing color fastness in example 7 is grade 5, the light color fastness is grade 5, the surface has no obvious damage and peeling, and the addition amount of the pearl powder in example 7 is more suitable than that in other examples, so that the rubbing color fastness, the light color fastness and the wear resistance of the automotive interior material can be enhanced.
Combining example 11 with example 14, it can be seen that the rubbing color fastness of example 14 is grade 6, the light color fastness is grade 5, the surface has no obvious damage and peeling, and the result is better than that of example 11, which shows that the quartz powder is more suitable for pretreatment before use, and can enhance the rubbing color fastness, light color fastness and wear resistance of the automotive interior material.
Combining example 14 and example 15, it can be seen that example 15 has a crocking color fastness of 6 grade, a light fastness of 6 grade, and no obvious damage or peeling on the surface, which is superior to example 14, indicating that the titanium dioxide powder is more suitable for pretreatment before use, and can enhance the crocking color fastness, light fastness and wear resistance of the automotive interior material.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (5)

1. A TPO multicolor automotive interior material is characterized in that: the automotive interior material sequentially comprises a surface treatment layer, a colorful surface layer, a TPO (thermoplastic polyolefin) film layer, a PP Foam layer and a back treatment layer from top to bottom, wherein the surface treatment layer and the back treatment layer are both aqueous polyurethane layers;
the waterborne polyurethane layer comprises the following raw materials in parts by weight: 50-75 parts of aqueous polyurethane dispersoid, 1-5 parts of silicon dioxide, 0.2-3.2 parts of acrylic acid alkali swelling thickener, 0.2-2.5 parts of curing agent and 10-40 parts of water;
the colorful surface layer comprises the following raw materials in parts by weight: 65-95 parts of modified epoxy acrylate, 12-35 parts of pearl powder, 6-15 parts of titanium dioxide, 2-6 parts of dicyclopentenyl acrylate, 1-5 parts of ethylene glycol phenyl ether, 1-5 parts of photoinitiator and 15-35 parts of water, wherein the modified epoxy acrylate is prepared by modifying epoxy acrylate with quartz powder;
the modified epoxy acrylate is prepared by the following method: adding acetone into quartz powder, performing ultrasonic dispersion for 30-50min under the power of 180 plus 210W, adding epoxy acrylate, performing ultrasonic dispersion for 30-50min under the power of 180 plus 210W, adding m-phenylenediamine, stirring for 15-20min to obtain a mixture, and then curing the mixture at the temperature of 80-90 ℃ for 4-6h to obtain modified epoxy acrylate;
the TPO membrane layer comprises the following raw materials in parts by weight: 85-100 parts of modified TPO particles, 0.3-9 parts of auxiliary agent and 0.5-7 parts of pigment;
the PP Foam layer is made of a polypropylene foaming material;
the weight ratio of the pearl powder to the modified epoxy acrylate is 1: (2.5-5);
the quartz powder is pretreated by adopting a silane coupling agent before use;
the quartz powder is pretreated by the following method: putting gamma-glycidoxypropyltrimethoxysilane into an acetic acid solution, stirring for 15-20min to obtain a mixture, then adding quartz powder into the mixture, stirring for 20-30min, standing at 60-80 ℃ for 4-6h, filtering, washing the solid for 3-5 times, and drying the solid at 50-60 ℃ for 40-60min to obtain pretreated quartz powder;
the titanium dioxide is pretreated by adopting alumina before use;
the titanium dioxide is pretreated by adopting the following method: putting titanium dioxide into water, stirring for 15-25min to obtain a mixture, adding alumina into the mixture, stirring for 10-20min, adjusting the pH to 8.5 by using a sodium hydroxide solution, curing at 70-90 ℃ for 2-3h, filtering, and drying at 30-50 ℃ for 1-3h to obtain pretreated titanium dioxide;
the modified TPO particles are prepared by modifying TPO particles by adopting silica;
the modified TPO granules were prepared as follows: melting TPO granules and silica at the temperature of 125-140 ℃, adding 3-5kg of sodium hexametaphosphate, stirring for 20-30min, extruding and granulating to obtain the modified TPO granules.
2. The TPO multicolor automotive interior material according to claim 1, wherein:
the waterborne polyurethane layer comprises the following raw materials in parts by weight: 55-70 parts of aqueous polyurethane dispersoid, 2-3 parts of silicon dioxide, 0.5-2.5 parts of acrylic acid alkali swelling thickener, 0.5-1.5 parts of curing agent and 15-35 parts of water;
the colorful surface layer comprises the following raw materials in parts by weight: 70-85 parts of modified epoxy acrylate, 16-32 parts of pearl powder, 8-12 parts of titanium dioxide, 3-5 parts of dicyclopentenyl acrylate, 2-4 parts of ethylene glycol phenyl ether, 2-4 parts of photoinitiator and 20-30 parts of water;
the TPO membrane layer comprises the following raw materials in parts by weight: 92-98 parts of modified TPO particles, 0.9-3.9 parts of auxiliary agent and 1-4 parts of pigment.
3. The TPO multicolor automotive interior material according to claim 1, wherein: the auxiliary agent comprises a light stabilizer, an antioxidant and a flame retardant, and the weight ratio of the light stabilizer to the antioxidant to the flame retardant is 1:1: 1.
4. The TPO multicolor automotive interior material according to claim 3, wherein: the light stabilizer is a hindered amine light stabilizer, the antioxidant is an amine antioxidant, and the flame retardant is an inorganic flame retardant.
5. A method for preparing the TPO multicolor automotive interior material according to any one of claims 1 to 4, comprising the steps of:
mixing the aqueous polyurethane dispersion, silicon dioxide and water, uniformly stirring, adding an acrylic acid-alkali swelling thickener and a curing agent, and uniformly stirring to obtain aqueous polyurethane slurry;
mixing the modified epoxy acrylate, the dicyclopentenyl acrylate, the photoinitiator and water, uniformly stirring to obtain a mixture, adding the pearl powder and the titanium dioxide into the mixture, uniformly stirring, adding the ethylene glycol phenyl ether, and uniformly stirring to obtain a multicolor slurry;
heating and melting the polypropylene foaming material to obtain polypropylene slurry;
s1: melting the modified TPO particles, adding the auxiliary agent and the pigment, uniformly mixing, extruding, pressing into a film, and drying to obtain a TPO film layer;
s2: uniformly coating polypropylene slurry on the surface of the TPO film layer, and drying to form a PP Foam layer; uniformly coating the surface of the PP Foam layer, which is far away from the TPO film layer, with water-based polyurethane slurry, drying to form a back treatment layer, uniformly coating the multicolor slurry on one surface of the TPO film layer, which is far away from the PP Foam layer, drying to form a multicolor surface layer, obtaining a TPO multicolor base material, and obtaining a semi-finished product; and uniformly coating the surface of the TPO multicolor substrate far away from the TPO film layer with water-based polyurethane slurry, drying, and forming a surface treatment layer to obtain the TPO multicolor automotive interior material.
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