WO2024066972A1 - 一种高底漆上漆率聚丙烯材料及其制备方法和应用 - Google Patents

一种高底漆上漆率聚丙烯材料及其制备方法和应用 Download PDF

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WO2024066972A1
WO2024066972A1 PCT/CN2023/117154 CN2023117154W WO2024066972A1 WO 2024066972 A1 WO2024066972 A1 WO 2024066972A1 CN 2023117154 W CN2023117154 W CN 2023117154W WO 2024066972 A1 WO2024066972 A1 WO 2024066972A1
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parts
polypropylene
polypropylene material
primer coating
coating rate
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PCT/CN2023/117154
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English (en)
French (fr)
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俞飞
陈平绪
叶南飚
吴国峰
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金发科技股份有限公司
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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
    • C08L23/14—Copolymers of propene
    • 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
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to the field of polypropylene materials, in particular to a polypropylene material with a high primer coating rate and a preparation method and application thereof.
  • Polypropylene is a crystalline polymer with a regular structure, usually in the form of white granules or powders. It is an odorless, non-toxic, lightweight thermoplastic resin. Polypropylene has the advantages of easy processing, good impact strength, flexibility, and electrical insulation, and has good chemical resistance. It is widely used in the automotive industry, household appliances, electronics, packaging, building materials, and furniture.
  • the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a polypropylene material with a high primer coating rate and a preparation method and application thereof.
  • the coating rate of the polypropylene material reaches more than 60%, which can greatly reduce the spraying cost and environmental pressure, and has good comprehensive performance.
  • the technical solution adopted by the present invention is: a polypropylene material with a high primer coating rate, comprising the following components in parts by weight: 55 to 85 parts of polypropylene, 5 to 20 parts of ethylene-octene random copolymer, 0.3 to 1 part of niobium diselenide surface treated with vinyltriethoxysilane, 10 to 25 parts of filler, 0.1 to 0.3 parts of lubricant, and 0.1 to 0.4 parts of antioxidant.
  • the high primer coating rate polypropylene material comprises the following components in parts by weight: 65 parts of polypropylene, 15 parts of ethylene-octene random copolymer, 0.8 parts of niobium diselenide surface-treated with vinyltriethoxysilane, 20 parts of filler, 0.2 parts of lubricant, and 0.2 parts of antioxidant.
  • the melt index of the polypropylene under the test conditions of 230°C and 2.16kg is 10-100g/10min, tested according to the test standard ISO1133-1/2; more preferably, the melt index of the polypropylene is 20-60g/10min.
  • the material obtained by using the polypropylene with a melt index within the above range is easy to form, and the impact performance meets the requirements of the parts and is easy to spray.
  • the ethylene-octene random copolymer has a melt index of 13-30 g/10 min at 190° C. and 2.16 kg, as tested in accordance with test standard ISO 1133-1/2.
  • Ethylene-octene random copolymer has good fluidity, low viscosity, better dispersion effect, is more conducive to the spreading of materials, improves uniformity, and increases painting rate and peel strength.
  • the niobium diselenide surface-treated with vinyltriethoxysilane is prepared by the following preparation method: 100-150 kg of niobium diselenide powder is slowly (120-180 seconds) sprayed with 5-8 g of vinyltriethoxysilane, and mixed and homogenized in a high-speed mixer to obtain.
  • the present application adopts ethylene-octene random copolymer, niobium diselenide surface-treated with vinyl triethoxysilane, and filler compound.
  • the ethylene-octene random copolymer plays a riveting role between the rubber phase and the coating, and the niobium diselenide is conducive to electrostatic spraying;
  • the vinyl in vinyl triethoxysilane has good compatibility with ethylene-octene random copolymer, the triethoxy group has similar polarity with niobium diselenide, and the silane has good compatibility with fillers (especially talcum powder).
  • the polypropylene material of the present application increases the painting rate from about 35% to more than 60%, which can greatly reduce the spraying cost and environmental pressure.
  • the filler is at least one of talc and calcium carbonate.
  • the lubricant is a stearate lubricant.
  • the antioxidant is a hindered phenol antioxidant and/or a phosphite antioxidant; more preferably, the hindered phenol antioxidant is pentaerythritol tetrakis[ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl)propionate; and the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite.
  • the method for preparing the polypropylene material with high primer coating rate comprises the following steps: mixing the components, melting, extruding and granulating to obtain the material.
  • the mixing is performed at 500 to 800 rpm for 3 to 5 minutes.
  • the extrusion adopts a 75D co-rotating twin-screw extruder, and the temperature of the extruder from the feeding section to the die is 170°C, 200°C, 200°C, 210°C, 210°C, 205°C, 205°C, 200°C, and 200°C respectively.
  • the above-mentioned high primer coating rate polypropylene material is used in the preparation of parts with high polypropylene spray painting requirements, such as front and rear bumpers, wheel eyebrows, side skirts of automobiles, and housings of household rice cookers.
  • the present invention adopts polypropylene with a specific melt index to ensure that the material has basic fluidity and processing performance.
  • ethylene-octene random copolymer with a specific melt index, niobium diselenide surface-treated with vinyl triethoxysilane, and fillers are added to jointly improve the paintability of polypropylene, so that the paintability is increased from about 35% to 61%-67%, and the cantilever beam notched impact strength reaches 20.4-52.9 KJ/m 2 , peel strength reaches 1186-1382gf/cm, which can greatly reduce the spraying cost and environmental pressure, and the material has good comprehensive performance, suitable for parts that need to be sprayed with polypropylene.
  • the production process of the material of the invention is simple and suitable for mass production.
  • antioxidants and lubricants are commercially available, and the same antioxidants and lubricants are used in parallel experiments.
  • melt indices are all tested using the test standard ISO1133-1/2-2011.
  • PP-1 K9010, copolymer, melt index 10g/10min, supplier: Taiwan Chemical Fiber;
  • PP-2 BX3900, copolymer, melt index 60g/10min, supplier: Korea Aiskai;
  • PP-3 EP246P, copolymer, melt index 20g/10min, supplier: LyondellBasell;
  • PP-4 BX3920, copolymer, melt index 100g/10min, supplier: Korea Aiskai;
  • PP-5 BX3950, copolymer, melt index 120g/10min, supplier: Korea Aiskai;
  • PP-6 K8003, copolymer, melt index 3g/10min, supplier: Dushanzi Petrochemical;
  • Talc AH-51210, 3000 mesh talc, supplier: Liaoning Aihai;
  • Ethylene-octene random copolymer 1 8137, 190°C/2.16kg, melt index 13g/10min, supplier: Dow Chemical, USA;
  • Ethylene-octene random copolymer 2 8407, 190°C/2.16kg, melt index 30g/10min, supplier: Dow Chemical, USA;
  • Ethylene-octene random copolymer 3 8842, 190°C/2.16kg, melt index 1g/10min, supplier: Dow Chemical, USA;
  • Niobium diselenide NbSe 2 , supplier: Shenzhen Liutan Technology;
  • Niobium diselenide surface treated with vinyltriethoxysilane 100 kg of niobium diselenide powder was weighed and slowly (120 seconds) sprayed with 5 g of vinyltriethoxysilane, and mixed and homogenized in a high-speed mixer to obtain;
  • ⁇ -aminopropyltriethoxysilane surface treated niobium diselenide weigh 100 kg of niobium diselenide powder and slowly (120 seconds) Spray 5g of ⁇ -aminopropyltriethoxysilane, mix and homopolymerize in a high mixer to obtain;
  • Niobium diselenide surface treated with ⁇ -glycidyloxypropyltrimethoxysilane 100 kg of niobium diselenide powder was weighed and slowly (120 seconds) sprayed with 5 g of ⁇ -glycidyloxypropyltrimethoxysilane, and mixed and homopolymerized in a high-speed mixer to obtain;
  • Phosphite antioxidant SONOX168, supplier: commercially available;
  • Zinc stearate BS-2818, commercially available.
  • the polypropylene material of the embodiment and the comparative example, the preparation method comprises the following steps:
  • polypropylene materials of the embodiments and comparative examples were subjected to performance tests, and the specific test methods are as follows:
  • the peel strength was tested according to Dongfeng Nissan standard NESM01416.2.4C method.
  • Comparative Example 1 uses polypropylene with a melt index of 120 g/10 min.
  • the notched impact of the obtained polypropylene material is only 11.5 KJ/m 2 , the primer coating rate is as low as 35%, and the peel strength is as low as 788 gf/cm.
  • Comparative Example 2 uses ethylene-octene random copolymer with a melt index of 1 g/10 min.
  • the resulting polypropylene material has a notched impact of only 15.2 KJ/m 2 , a primer coating rate as low as 33%, and a peel strength as low as 681 gf/cm.
  • Comparative Example 3 uses niobium diselenide, and the primer coating rate of the obtained polypropylene material is as low as 31%, and the peel strength is as low as 653 gf/cm.
  • Comparative Example 4 does not add niobium diselenide surface treated with vinyltriethoxysilane, and the primer coating rate of the obtained polypropylene material is significantly reduced, and the peel strength is also reduced to a level that cannot meet the requirements of the Japanese main engine factory (peel strength ⁇ 800gf/cm).
  • Comparative Example 7 uses polypropylene with a melt index of 3 g/10 min.
  • the obtained polypropylene material has a notched impact of 16.2 KJ/m 2 , a primer coating rate of 55%, and a peel strength as low as 731 gf/cm, and cannot be used for injection molding of parts.
  • Comparative Example 9 uses niobium diselenide surface-treated with ⁇ -aminopropyltriethoxysilane, and the obtained polypropylene material has a notched impact of 13.1 KJ/m 2 , a primer coating rate of 34%, and a peel strength of 785 gf/cm.
  • Comparative Example 10 uses niobium diselenide surface-treated with ⁇ -glycidyloxypropyltrimethoxysilane, and the obtained polypropylene material has a notched impact of 11.9 KJ/m 2 , a primer coating rate of 39%, and a peel strength of 741 gf/cm.
  • the present invention solves the problem of low painting rate of polypropylene materials by compounding polypropylene with a specific melt index, ethylene-octene random copolymer and niobium diselenide surface-treated with vinyl triethoxysilane, and the painting rate is increased from about 35% to 61%-67%, the Izod notched impact strength reaches 20.4-52.9 KJ/m 2 , and the peel strength reaches 1186-1382 gf/cm, which can greatly reduce the spraying cost and environmental pressure, and the material has good comprehensive performance and can be used for spraying automobile bumpers, wheel eyebrows, side skirts, small household appliance shells and other parts.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

本发明公开了一种高底漆上漆率聚丙烯材料及其制备方法和应用。高底漆上漆率聚丙烯材料包括以下重量份计的组分：聚丙烯55～85份、乙烯-辛烯无规共聚物5～20份、乙烯基三乙氧基硅烷表面处理的二硒化铌0.3～1份、填料10～25份、润滑剂0.1～0.3份、抗氧剂0.1～0.4份。本发明通过采用特定熔融指数的聚丙烯，保证材料具有基本的流动性和加工性能，在此基础上通过添加特定熔融指数的乙烯-辛烯无规共聚物和乙烯基三乙氧基硅烷表面处理的二硒化铌，二者共同作用提高聚丙烯的上漆率、悬臂梁缺口冲击强度和剥离强度，可大幅降低喷涂成本和环保压力，且材料具有较好的综合性能，适用于高聚丙烯喷漆要求零部件。

Description

一种高底漆上漆率聚丙烯材料及其制备方法和应用 技术领域
本发明涉及聚丙烯材料领域，尤其是一种高底漆上漆率聚丙烯材料及其制备方法和应用。
背景技术
聚丙烯(PP)是一种结构规整的结晶性聚合物，常为白色粒料或粉料，是无味、无毒、质轻的热塑性树脂。聚丙烯具备易加工、冲击强度、挠曲性以及电绝缘性好等优点，并具有良好的耐化学性能，在汽车工业、家用电器、电子、包装、建材及家具等方面具有广泛的应用。
环保化喷涂是近年来各大汽车主机厂推行的主流趋势，大多朝着水性底漆的方向发展，但是水性底漆上漆效果不佳，目前大部分喷涂厂主要是从喷涂工艺或设备上提高底漆上漆率，而在材料方面暂未见相关报道。
发明内容
基于此，本发明的目的在于克服上述现有技术的不足之处，提供一种高底漆上漆率聚丙烯材料及其制备方法和应用。该聚丙烯材料的上漆率达到60％以上，可大幅降低喷涂成本和环保压力，且具有较好的综合性能。
为实现上述目的，本发明所采取的技术方案为：一种高底漆上漆率聚丙烯材料，包括以下重量份计的组分：聚丙烯55～85份、乙烯-辛烯无规共聚物5～20份、乙烯基三乙氧基硅烷表面处理的二硒化铌0.3～1份、填料10～25份、润滑剂0.1～0.3份、抗氧剂0.1～0.4份。
优选地，所述高底漆上漆率聚丙烯材料，包括以下重量份计的组分：聚丙烯65份、乙烯-辛烯无规共聚物15份、乙烯基三乙氧基硅烷表面处理的二硒化铌0.8份、填料20份、润滑剂0.2份、抗氧剂0.2份。
优选地，所述聚丙烯在230℃、2.16kg测试条件下的熔融指数为10～100g/10min，按照测试标准ISO1133-1/2测试；更优选地，所述聚丙烯的熔融指数为20～60g/10min。采用熔指在以上范围内的聚丙烯得到的材料易于成型，同时冲击性能满足零部件要求，且易于喷涂。
优选地，所述乙烯-辛烯无规共聚物在190℃、2.16kg测试条件下的熔融指数为13-30g/10min，按照测试标准ISO1133-1/2测试。在这个熔融指数范围内的 乙烯-辛烯无规共聚物流动性好，粘度低，分散效果更佳，更加有利于材料的铺开，提高均匀性，提高上漆率和剥离强度。
优选地，所述乙烯基三乙氧基硅烷表面处理的二硒化铌通过如下制备方法制备：取100-150kg二硒化铌粉末缓慢(120-180秒)喷洒5-8g乙烯基三乙氧基硅烷，高混机混合均聚，得到。
本申请采用乙烯-辛烯无规共聚物、乙烯基三乙氧基硅烷表面处理的二硒化铌、填料复配，乙烯-辛烯无规共聚物作为橡胶相与涂料之间起到铆接的作用，二硒化铌利于静电喷涂；乙烯基三乙氧基硅烷中的乙烯基与乙烯-辛烯无规共聚物相容性好，三乙氧基与二硒化铌极性相近，硅烷与填料(尤其是滑石粉)相容性好，三者协同作用，更好地促进体系的分散性和均一性，有利于材料的喷涂性能。本申请的聚丙烯材料使得上漆率从35％左右提升到60％以上，可大幅降低喷涂成本和环保压力。
优选地，所述填料为滑石粉、碳酸钙中的至少一种。
优选地，所述润滑剂为硬脂酸盐类润滑剂。
优选地，所述抗氧剂为受阻酚抗氧剂和/或亚磷酸酯类抗氧剂；更优选地，所述受阻酚抗氧剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯；所述亚磷酸酯类抗氧剂为亚磷酸三(2,4-二叔丁基苯基)酯。
上述高底漆上漆率聚丙烯材料的制备方法，包括以下步骤：将各组分混合，熔融挤出造粒，得到材料。
优选地，所述混合为500～800转/分钟混合3～5分钟。
优选地，所述挤出采用75D同向双螺杆挤出机，挤出机的温度从喂料段到机头依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
上述高底漆上漆率聚丙烯材料在制备高聚丙烯喷漆要求零部件中的应用，零部件如汽车前后保险杠、轮眉、侧裙以及家电电饭煲外壳等。
相对于现有技术，本发明的有益效果为：
本发明通过采用特定熔融指数的聚丙烯，保证材料具有基本的流动性和加工性能，在此基础上通过添加特定熔融指数的乙烯-辛烯无规共聚物、乙烯基三乙氧基硅烷表面处理的二硒化铌、填料，共同作用提高聚丙烯的上漆率，使得上漆率从35％左右上漆率提升到61％-67％，悬臂梁缺口冲击强度达到20.4-52.9 KJ/m2，剥离强度达到1186-1382gf/cm，可大幅降低喷涂成本和环保压力，且材料具有较好的综合性能，适用于需要喷涂聚丙烯的零部件。本发明材料的生产工艺简单，适合大批量生产。
具体实施方式
为更好的说明本发明的目的、技术方案和优点，下面将结合具体实施例对本发明作进一步说明。
实施例中，所使用的实验方法如无特殊说明，均为常规方法，所用的材料、试剂等，如无特殊说明，均可从商业途径得到。
下述实施例和对比例中，如无特别说明，抗氧剂、润滑剂均通过市售获得，且平行实验中使用的是相同的抗氧剂、润滑剂。
以下熔融指数均采用测试标准ISO1133-1/2-2011进行测试。
实施例及对比例所用原料说明如下：
PP-1：K9010，共聚，熔融指数为10g/10min，供应商：台湾化纤；
PP-2：BX3900，共聚，熔融指数为60g/10min，供应商：韩国爱思开；
PP-3：EP246P，共聚，熔融指数为20g/10min，供应商：利安德巴赛尔；
PP-4：BX3920，共聚，熔融指数为100g/10min，供应商：韩国爱思开；
PP-5：BX3950，共聚，熔融指数为120g/10min，供应商：韩国爱思开；
PP-6：K8003，共聚，熔融指数为3g/10min，供应商：独山子石化；
碳酸钙：75T，供应商：长兴欧米亚；
滑石粉：AH-51210，3000目滑石粉，供应商：辽宁艾海；
乙烯-辛烯无规共聚物1：8137，190℃/2.16kg，熔融指数为13g/10min，供应商：美国陶氏化学；
乙烯-辛烯无规共聚物2：8407，190℃/2.16kg，熔融指数为30g/10min，供应商：美国陶氏化学；
乙烯-辛烯无规共聚物3：8842，190℃/2.16kg，熔融指数为1g/10min，供应商：美国陶氏化学；
二硒化铌：NbSe2，供应商：深圳六碳科技；
乙烯基三乙氧基硅烷表面处理的二硒化铌：称取100kg二硒化铌粉末缓慢(120秒)喷洒5g乙烯基三乙氧基硅烷，高混机混合均聚，得到；
γ-氨丙基三乙氧基硅烷表面处理的二硒化铌：称取100kg二硒化铌粉末缓慢 (120秒)喷洒5gγ-氨丙基三乙氧基硅烷，高混机混合均聚，得到；
γ-缩水甘油醚氧丙基三甲氧基硅烷表面处理的二硒化铌：称取100kg二硒化铌粉末缓慢(120秒)喷洒5gγ-缩水甘油醚氧丙基三甲氧基硅烷，高混机混合均聚，得到；
受阻酚类抗氧剂，SONOX1010，供应商：市售；
亚磷酸酯类抗氧剂，SONOX168，供应商：市售；
硬脂酸锌，BS-2818，市售。
实施例及对比例
实施例及对比例的聚丙烯材料，组分和用量如表1所示。
表1

实施例和对比例的聚丙烯材料，制备方法包括如下步骤：
称取各组分，在高速混合机中800转/分钟混合4分钟，将混合好的粒子加入75D同向双螺杆挤出机中，熔融挤出造粒，干燥，冷却，得到聚丙烯材料；双螺杆挤出机的温度从喂料段到机头依次为170℃、200℃、200℃、210℃、210℃、 205℃、205℃、205℃、200℃、200℃。
性能测试
实施例及对比例的聚丙烯材料进行性能测试，具体测试方法如下：
悬臂梁缺口冲击按照ISO180进行测试；
底漆上漆率＝(1L底漆实际上漆面积/1L底漆理论上漆面积)*100％；
剥离强度按照东风日产的标准NESM01416.2.4Cmethod进行测试。
测试结果如表2所示。
表2
对比例1采用熔融指数为120g/10min的聚丙烯，得到的聚丙烯材料缺口冲击只有11.5KJ/m2，底漆上漆率低至35％，剥离强度低至788gf/cm。
对比例2采用熔融指数为1g/10min的乙烯-辛烯无规共聚物，得到的聚丙烯材料缺口冲击只有15.2KJ/m2，底漆上漆率低至33％，剥离强度低至681gf/cm。
对比例3采用二硒化铌，得到的聚丙烯材料底漆上漆率低至31％，剥离强度低至653gf/cm。
对比例4未添加乙烯基三乙氧基硅烷表面处理的二硒化铌，得到的聚丙烯材料底漆上漆率明显下降，剥离强度也下降到完全不能满足日产主机厂的要求(剥离强度≥800gf/cm)。
对比例5的乙烯-辛烯无规共聚物用量过少，得到的聚丙烯材料缺口冲击只 有10.2KJ/m2，底漆上漆率低至32％以及剥离强度低至471gf/cm。
对比例6的乙烯基三乙氧基硅烷表面处理的二硒化铌用量过少，得到的聚丙烯材料底漆上漆率和剥离强度明显下降，其他性能基本无影响。
对比例7采用熔融指数为3g/10min的聚丙烯，得到的聚丙烯材料缺口冲击为16.2KJ/m2，底漆上漆率为55％，剥离强度低至731gf/cm，不能正常注塑零部件。
对比例8添加的乙烯基三乙氧基硅烷表面处理的二硒化铌用量过多，得到的聚丙烯材料缺口冲击只有18.3KJ/m2，底漆上漆率为50％，剥离强度低至643gf/cm。
对比例9采用γ-氨丙基三乙氧基硅烷表面处理的二硒化铌，得到的聚丙烯材料缺口冲击为13.1KJ/m2，底漆上漆率为34％，剥离强度为785gf/cm。
对比例10采用γ-缩水甘油醚氧丙基三甲氧基硅烷表面处理的二硒化铌，得到的聚丙烯材料缺口冲击为11.9KJ/m2，底漆上漆率为39％，剥离强度为741gf/cm。
结合对比例与实施例可知，本发明通过将特定熔融指数的聚丙烯、乙烯-辛烯无规共聚物与乙烯基三乙氧基硅烷表面处理的二硒化铌复配，解决了聚丙烯材料上漆率低的问题，上漆率从35％左右提升到61％-67％，悬臂梁缺口冲击强度达到20.4-52.9KJ/m2，剥离强度达到1186-1382gf/cm，可大幅降低喷涂成本和环保压力，且材料具有较好的综合性能，可用于喷涂汽车保险杠、轮眉、侧裙以及小家电外壳等零部件。
最后所应当说明的是，以上实施例仅用以说明本发明的技术方案而非对本发明保护范围的限制，尽管参照较佳实施例对本发明作了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的实质和范围。

Claims (9)

  1. 一种高底漆上漆率聚丙烯材料，其特征在于，包括以下重量份计的组分：聚丙烯55～85份、乙烯-辛烯无规共聚物5～20份、乙烯基三乙氧基硅烷表面处理的二硒化铌0.3～1份、填料10～25份、润滑剂0.1～0.3份、抗氧剂0.1～0.4份；
    所述聚丙烯为共聚聚丙烯，在230℃、2.16kg测试条件下的熔融指数为10～100g/10min；
    所述乙烯-辛烯无规共聚物在190℃、2.16kg测试条件下的熔融指数为13-30g/10min。
  2. 根据权利要求1所述高底漆上漆率聚丙烯材料，其特征在于，所述聚丙烯在230℃、2.16kg测试条件下的熔融指数为20～60g/10min。
  3. 根据权利要求1所述高底漆上漆率聚丙烯材料，其特征在于，所述填料为滑石粉、碳酸钙中的至少一种。
  4. 根据权利要求1所述高底漆上漆率聚丙烯材料，其特征在于，所述润滑剂为硬脂酸盐类润滑剂。
  5. 根据权利要求1所述高底漆上漆率聚丙烯材料，其特征在于，所述抗氧剂为受阻酚抗氧剂和/或亚磷酸酯类抗氧剂。
  6. 根据权利要求5所述高底漆上漆率聚丙烯材料，其特征在于，所述受阻酚抗氧剂为四[β-(3，5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯；所述亚磷酸酯类抗氧剂为亚磷酸三(2,4-二叔丁基苯基)酯。
  7. 权利要求1-6任一项所述高底漆上漆率聚丙烯材料的制备方法，其特征在于，包括以下步骤：将各组分混合，熔融挤出造粒，得到高底漆上漆率聚丙烯材料。
  8. 根据权利要求7所述高底漆上漆率聚丙烯材料的制备方法，其特征在于，所述挤出采用75D同向双螺杆挤出机，挤出机的温度从喂料段到机头依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
  9. 权利要求1-6任一项所述高底漆上漆率聚丙烯材料在制备高聚丙烯喷漆要求零部件中的应用。
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