WO2019129165A1 - 一种聚丙烯组合物及其制备方法与应用 - Google Patents

一种聚丙烯组合物及其制备方法与应用 Download PDF

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WO2019129165A1
WO2019129165A1 PCT/CN2018/124515 CN2018124515W WO2019129165A1 WO 2019129165 A1 WO2019129165 A1 WO 2019129165A1 CN 2018124515 W CN2018124515 W CN 2018124515W WO 2019129165 A1 WO2019129165 A1 WO 2019129165A1
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polypropylene
antioxidant
polypropylene composition
elastomer
parts
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PCT/CN2018/124515
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English (en)
French (fr)
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苏娟霞
杨波
谢正瑞
孙刚
林洁龙
雷亮
李振华
卢朝亮
罗忠富
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金发科技股份有限公司
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Publication of WO2019129165A1 publication Critical patent/WO2019129165A1/zh

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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
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter

Definitions

  • the invention relates to a polypropylene composition and a preparation method and application thereof, in particular to an ultra-low atomization vehicle polypropylene composition and a preparation method and application thereof.
  • Polypropylene has the advantages of low cost, light weight, high strength, good chemical resistance, good processing technology and easy recycling. It has been widely used in automotive parts in recent years. Talc-filled elastomer-toughened polypropylene composites are commonly used in the preparation of door panels, columns, instrument panels, bumpers, and the like. With the implementation of the mandatory national standard “Guidelines for Air Quality Assessment in Passenger Vehicles”, the requirements of volatile substances such as odor, VOC and atomization of interior parts are becoming stricter. Atomization refers to the phenomenon that organic substances contained in automotive interior parts are vaporized and volatilized at a certain temperature, and then condensed on the glass. In the summer, the temperature of automotive interior parts such as instrument panels can be as high as 80 ° C.
  • the present invention provides a polypropylene composition
  • a polypropylene composition comprising polypropylene having a molecular weight distribution index Mw/Mn of not more than 5.
  • the present invention strictly controls the molecular weight distribution of the polypropylene, and controls the low molecular weight of the polypropylene by controlling the molecular weight distribution.
  • the polypropylene of the present invention has a molecular weight distribution index Mw/Mn of not more than 5, and the resulting polypropylene composition has an ultra-low degree of atomization.
  • the polypropylene used in the present invention may be a metallocene-catalyzed synthetic polypropylene or a Ziegler-Natta catalyzed synthetic polypropylene.
  • the polypropylene has a molecular weight distribution index Mw/Mn of from 1 to 5. More preferably, the polypropylene has a molecular weight distribution index Mw/Mn of from 1 to 3.5.
  • Mw is a weight average molecular weight
  • Mn is a number average molecular weight.
  • the molecular weight distribution index Mw/Mn of the polypropylene is selected. It is 1-5, preferably 1-3.5.
  • the polypropylene composition comprises the following components by weight: 29 to 90 parts of polypropylene, 5 to 30 parts of an elastomer, 5 to 40 parts of a filler, and processed. 0.1 to 1 part of the auxiliary.
  • polypropylene composition of the present invention at least one of the following (a) to (c):
  • the elastomer has a density of from 0.850 to 0.900 g/cm 3 , the elastomer has a melt mass flow rate of from 0.5 to 1.2 g/10 min, and the melt mass flow rate is 2.16 kg weight according to ISO 1133 and The temperature is measured at 190 ° C;
  • the elastomer is an ethylene-propylene copolymer, an ethylene-hexene copolymer, an ethylene-butene copolymer, an ethylene-octene copolymer, a styrene-butadiene-styrene copolymer, At least one of hydrogenated styrene-butadiene-styrene copolymers;
  • the filler is spherical, flake or needle-shaped, the filler is at least one of talc, calcium carbonate, wollastonite, barium sulfate, mica, silicon micropowder, silica, montmorillonite;
  • the processing aid includes an antioxidant and a light stabilizer.
  • the filler has an average particle diameter D50 of 2 to 20 ⁇ m;
  • the antioxidant is composed of a hindered phenol antioxidant and a phosphite antioxidant.
  • the weight ratio of the hindered phenolic antioxidant to the phosphite antioxidant is 1: (1 to 2);
  • the light stabilizer is a hindered amine light stabilizer.
  • the polypropylene composition is composed of the following components by weight: 44.5 parts of polypropylene, 15 parts of elastomer, 40 parts of filler, and 0.5 part of processing aid;
  • the polypropylene has a molecular weight distribution index Mw/Mn of 1;
  • the elastomer is an ethylene-butene copolymer, the elastomer has a density of 0.862 g/cm 3 , and the melt mass flow rate of the elastomer is 1.2 g/10 min, the melt mass flow rate is measured according to ISO 1133 using a weight of 2.16 kg and measured at a temperature of 190 ° C;
  • the filler is a silicon micropowder;
  • the processing aid consists of an antioxidant and a light stabilizer, the antioxidant
  • the agent is composed of an antioxidant 1010 and an antioxidant 168, the weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:2; and the light stabilizer is a hindered amine UV
  • the present invention provides a method of preparing the above polypropylene composition, comprising the steps of:
  • step (2) The premix obtained in the step (1) is melt-extruded through a twin-screw extruder, and the polypropylene composition is obtained by vacuum granulation; wherein the temperature of each screw of the twin-screw extruder is 190 ⁇ 230 ° C.
  • the present invention provides the use of the above polypropylene composition for the preparation of automotive interior parts.
  • the vehicular interior parts are an instrument panel, a sub-dashboard, a column, a glove box, a door panel, a door sill, and a lamp bracket.
  • the present invention provides a vehicular interior trim comprising the above polypropylene composition.
  • the present invention has an ultra-low atomization degree by defining a molecular weight distribution of a polypropylene raw material by using the obtained polypropylene composition;
  • the polypropylene composition of the present invention can be widely applied to the production of automotive interior parts such as instrument panels, sub-dashboards, columns, glove boxes, door panels, door sills, and lamp brackets, and is particularly suitable for automotive interior parts. .
  • the polypropylene molecular weight distribution Mw/Mn is determined by gel permeation chromatography at a temperature of 135 ° C and the solvent is 1,3,4-trichlorobenzene; the melt mass flow rate (MFR) of the elastomer is based on ISO 1133 was measured using a weight of 2.16 kg and measured at a temperature of 190 °C.
  • polypropylene composition of the present embodiment is composed of the following components by weight: 29 parts of polypropylene, 30 parts of elastomer, 40 parts of filler, and 1 part of processing aid;
  • polypropylene is synthesized by Ziegler-Natta, the molecular weight distribution index of polypropylene is Mw/Mn is 3.5; the elastomer is ethylene-butene copolymer, the density of the elastomer is 0.865g/cm 3 , MFR (190 ° C) , 2.16kg) is 0.5g/10min; the filler is talc, flake, the average particle diameter D50 of the filler is 10 ⁇ m; the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of the antioxidant 1010 and The antioxidant 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • step (2) The premix obtained in the step (1) is melt-extruded through a twin-screw extruder, and the polypropylene composition is obtained by vacuum granulation; wherein the temperature of each screw of the twin-screw extruder is 190 ⁇ 230 ° C.
  • the polypropylene composition of the present embodiment is composed of the following components by weight: 49.5 parts of polypropylene, 30 parts of elastomer, 20 parts of filler, 0.5 part of processing aid;
  • polypropylene is catalytically synthesized by metallocene, and the molecular weight distribution index Mw/Mn of the polypropylene is 2;
  • the elastomer is an ethylene-octene copolymer, the density of the elastomer is 0.900 g/cm 3 , MFR (190 ° C, 2.16kg) is 1.0g/10min;
  • the filler is talc, flake, and the average particle diameter D50 of the filler is 10 ⁇ m;
  • the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and an anti-oxidant
  • the oxygen agent 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of this example was the same as that of Example 1.
  • the polypropylene composition of the present embodiment is composed of the following parts by weight: 79 parts of polypropylene, 10 parts of elastomer, 10 parts of filler, and 1 part of processing aid;
  • polypropylene is catalytically synthesized by metallocene, and the molecular weight distribution index Mw/Mn of polypropylene is 2.5;
  • the elastomer is an ethylene-butene copolymer, the density of the elastomer is 0.865 g/cm 3 , MFR (190 ° C, 2.16kg) is 0.5g/10min;
  • the filler is talc, flake, and the average particle diameter D50 of the filler is 10 ⁇ m;
  • the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and an anti-oxidant
  • the oxygen agent 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of this example was the same as that of Example 1.
  • the polypropylene composition of the present embodiment is composed of the following components by weight: 59.9 parts of polypropylene, 25 parts of elastomer, 15 parts of filler, and 0.1 part of processing aid;
  • polypropylene is catalytically synthesized by metallocene, and the molecular weight distribution index Mw/Mn of the polypropylene is 2;
  • the elastomer is an ethylene-octene copolymer, the density of the elastomer is 0.855 g/cm 3 , MFR (190 ° C, 2.16kg) is 1.0g/10min;
  • the filler is talc, flake, and the average particle diameter D50 of the filler is 10 ⁇ m;
  • the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and an anti-oxidant
  • the oxygen agent 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of this example was the same as that of Example 1.
  • the polypropylene composition of the present embodiment is composed of the following parts by weight: 90 parts of polypropylene, 5 parts of an elastomer, 5 parts of a filler, and 0.1 part of a processing aid;
  • polypropylene is catalytically synthesized by Ziegler-Natta, and the molecular weight distribution index Mw/Mn of the polypropylene is 5;
  • the elastomer is an ethylene-propylene copolymer, the density of the elastomer is 0.850 g/cm 3 , MFR (190 ° C, 2.16kg) is 1.0g/10min;
  • the filler is calcium carbonate, spherical, and the filler has an average particle diameter D50 of 2 ⁇ m;
  • the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and an antioxidant.
  • the agent 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1.5; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of this example was the same as that of Example 1.
  • the polypropylene composition of the present embodiment is composed of the following components by weight: 44.5 parts of polypropylene, 15 parts of elastomer, 40 parts of filler, and 0.5 part of processing aid;
  • the polypropylene is catalytically synthesized by metallocene, and the molecular weight distribution index Mw/Mn of the polypropylene is 1;
  • the elastomer is an ethylene-butene copolymer, and the density of the elastomer is 0.862 g/cm 3 , and the elastomer
  • the melt mass flow rate is 1.2 g/10 min;
  • the filler is silicon micropowder, spherical, and the average particle diameter D50 of the filler is 20 ⁇ m;
  • the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and
  • the antioxidant 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:2; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of this example was the same as that of Example 1.
  • the polypropylene composition of the present comparative composition is composed of the following parts by weight: 29 parts of polypropylene, 30 parts of elastomer, 40 parts of filler, and 1 part of processing aid;
  • polypropylene is synthesized by Ziegler-Natta, the molecular weight distribution index of polypropylene is Mw/Mn is 6; the elastomer is ethylene-butene copolymer, the density of the elastomer is 0.865g/cm 3 , MFR (190 ° C) , 2.16kg) is 0.5g/10min; the filler is talc, flake, the average particle diameter D50 of the filler is 10 ⁇ m; the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of the antioxidant 1010 and The antioxidant 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of the present comparative example was the same as in Example 1.
  • the polypropylene composition of the present comparative composition was composed of the following parts by weight: 49.5 parts of polypropylene, 30 parts of elastomer, 20 parts of filler, and 0.5 part of processing aid;
  • polypropylene is synthesized by Ziegler-Natta, the molecular weight distribution index of polypropylene is Mw/Mn is 10; the elastomer is ethylene-octene copolymer, the density of the elastomer is 0.900g/cm 3 , MFR (190 ° C) , 2.16kg) is 1.0g/10min; the filler is talc, flake, the average particle diameter D50 of the filler is 10 ⁇ m; the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and The antioxidant 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of the present comparative example was the same as in Example 1.
  • the polypropylene composition of the present comparative composition is composed of the following parts by weight: 79 parts of polypropylene, 10 parts of elastomer, 10 parts of filler, and 1 part of processing aid;
  • polypropylene is synthesized by Ziegler-Natta, the molecular weight distribution index of polypropylene is Mw/Mn is 6; the elastomer is ethylene-butene copolymer, the density of the elastomer is 0.865g/cm 3 , MFR (190 ° C) , 2.16kg) is 0.5g/10min; the filler is talc, flake, the average particle diameter D50 of the filler is 10 ⁇ m; the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of the antioxidant 1010 and The antioxidant 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of the present comparative example was the same as in Example 1.
  • the polypropylene composition of the present comparative composition is composed of the following parts by weight: 59.9 parts of polypropylene, 25 parts of elastomer, 15 parts of filler, and 0.1 part of processing aid;
  • polypropylene is synthesized by Ziegler-Natta, the molecular weight distribution index of polypropylene is Mw/Mn is 6; the elastomer is ethylene-octene copolymer, the density of the elastomer is 0.855g/cm 3 , MFR (190 ° C) , 2.16kg) is 1.0g/10min; the filler is talc, flake, the average particle diameter D50 of the filler is 10 ⁇ m; the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of an antioxidant 1010 and The antioxidant 168 is composed of a weight ratio of the antioxidant 1010 to the antioxidant 168 of 1:1; and the light stabilizer is a hindered amine UV-3853.
  • the preparation method of the polypropylene composition of the present comparative example was the same as in Example 1.
  • the atomization degree (gloss method) of the polypropylene compositions of Examples 1 to 6 and Comparative Examples 1 to 4 was measured, and the measurement standard was ISO 6452-2007, and the test conditions were: heating temperature (100 ⁇ 0.5). °C, heating time (3 ⁇ 3) min, drying time (1 ⁇ 0.1) h, the results of the measurement are shown in Table 1.
  • the polypropylene composition prepared by the invention has a haze degree (gloss method) of more than 85% by the definition of the molecular weight distribution of the raw material polypropylene, and has an ultra-low atomization degree exceeding the material standard material. The requirement of atomization.
  • This example examines the effect of the molecular weight distribution index of polypropylene in the polypropylene composition on its atomization.
  • the present embodiment prepared different test group polypropylene compositions and control polypropylene compositions according to the method of the present invention, and measured the polypropylene composition of each test group and the control group according to the method described in Example 7. The degree of atomization of the polypropylene composition.
  • test group polypropylene composition and the control polypropylene composition were each composed of the following parts by weight: 29 to 90 parts of polypropylene, 5 to 30 parts of elastomer, 5 to 40 parts of filler, and 0.1 to 1 processing aid.
  • the elastomer has a density of 0.850-0.900 g/cm 3 , the melt flow rate of the elastomer is 0.5-1.2 g/10 min, and the melt mass flow rate is 2.16 kg weight according to ISO 1133 and is 190 ° C.
  • the elastomer is an ethylene-propylene copolymer, an ethylene-hexene copolymer, an ethylene-butene copolymer, an ethylene-octene copolymer, a styrene-butadiene-styrene copolymer, a hydrogenated styrene At least one of butadiene-styrene copolymer;
  • the filler is spherical, flake or needle, and the filler is talc, calcium carbonate, wollastonite, barium sulfate, mica, silicon micropowder, silica At least one of montmorillonite, the filler has an average particle diameter D50 of 2 to 20 ⁇ m;
  • the processing aid is composed of an antioxidant and a light stabilizer, and the antioxidant is composed of a hindered phenolic antioxidant and a phosphite.
  • Antioxidant composition the weight ratio of the hindered phenolic antioxidant to the phosphite antioxidant is 1: (1) 2), the light stabilizer is a hindered amine light stabilizer.
  • the test group polypropylene composition and the control polypropylene composition were prepared in the same manner as in Example 1.
  • Control group 1 5.5 78.6 Control group 2 6 76.3 Control group 3 8 70.1 Control group 4 10 66.9
  • the molecular weight distribution index Mw/Mn of the polypropylene in the polypropylene composition affects the degree of atomization. Under the same conditions in the polypropylene composition, the molecular weight distribution index Mw/Mn of the polypropylene is lower. The lower the degree of atomization of the polypropylene composition, that is, the higher the gloss retention of the surface of the slide at the time of atomization; and when the molecular weight distribution index Mw/Mn of the polypropylene is more than 5, the gloss retention rate sharply decreases.

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Abstract

本发明涉及一种聚丙烯组合物及其制备方法与应用。本发明的聚丙烯组合物包括聚丙烯，所述聚丙烯的分子量分布指数Mw/Mn不大于5。本发明通过对聚丙烯原料分子量分布的限定，采用所得聚丙烯组合物生产的制品具有超低的雾化度；本发明的聚丙烯组合物可广泛应用于仪表板、副仪表板、立柱、手套箱、门板、门槛、车灯支架等车用内饰件的生产，尤其适用于汽车用内饰件。

Description

一种聚丙烯组合物及其制备方法与应用 技术领域
本发明涉及一种聚丙烯组合物及其制备方法与应用，具体涉及一种超低雾化度车用聚丙烯组合物及其制备方法与应用。
背景技术
聚丙烯具有成本低、质量轻、强度高、耐化学性能好、加工工艺性好、易回收等优点，近年在汽车部件上得到了广泛应用。滑石粉填充弹性体增韧聚丙烯复合材料常用于制备门板、立柱、仪表盘、保险杠等。随着强制性国家标准《乘用车内空气质量评价指南》的实施，各主机厂对内饰件的挥发性物质如气味、VOC、雾化度等要求也日益严格。雾化是指汽车内饰件中含有的有机物在一定温度下气化并挥发出来，随后在玻璃上冷凝的现象。在夏季，汽车内饰件如仪表板等温度可高达80℃，在该温度下，小分子挥发出来后除了造成气味增加，部分物质冷凝在挡风玻璃或车窗上，会严重影响驾驶员的视线，从而造成安全隐患。随着人们对车用材料的认识逐渐深刻，对零部件雾化度的要求也越来越高。
从雾化度的测试标准来看，其主要监控100℃挥发出来的物质重新冷凝在玻璃上后对玻璃造成的光泽度变化或重量的增加，也就是说有些有机物虽然挥发出来但不在玻璃上冷凝的话并不会对雾度造成影响，有些有机物虽然能冷凝但在干燥过程中重新挥发的话也不会对雾化度造成影响。但是那些100℃左右能够挥发但是常温挥发速度较慢的物质就有可能造成非常大的影响。
发明内容
本发明的目的在于克服上述现有技术的不足之处而提供一种雾化度超低的聚丙烯组合物及其制备方法与应用。
为实现上述目的，本发明采取的技术方案为：
第一方面，本发明提供了一种聚丙烯组合物，其包括聚丙烯，所述聚丙烯 的分子量分布指数Mw/Mn不大于5。
研究发现，聚丙烯中的低分子量的组成部分也就是低聚物含量影响聚丙烯组合物的雾化度，本发明严格控制聚丙烯的分子量分布，通过对分子量分布控制来控制聚丙烯中低分子物质的含量。本发明聚丙烯的分子量分布指数Mw/Mn不大于5，得到的聚丙烯组合物制备具有超低的雾化度。
本发明采用的聚丙烯可以是茂金属催化合成的聚丙烯，也可以是Ziegler-Natta催化合成的聚丙烯。
作为本发明所述聚丙烯组合物的优选实施方式，所述聚丙烯的分子量分布指数Mw/Mn为1-5。更优选地，所述聚丙烯的分子量分布指数Mw/Mn为1-3.5。其中，Mw是重均分子量，Mn是数均分子量。在聚丙烯组合物中其他组分相同的情况下，聚丙烯的分子量分布指数越低，聚丙烯组合物的雾化度越低，综合考虑成本等问题，选择聚丙烯的分子量分布指数Mw/Mn为1-5，优选为1-3.5。
作为本发明所述聚丙烯组合物的优选实施方式，所述聚丙烯组合物包括下述重量份的组分：聚丙烯29～90份，弹性体5～30份，填料5～40份，加工助剂0.1～1份。
作为本发明所述聚丙烯组合物的优选实施方式，如下(a)～(c)中的至少一种：
(a)所述弹性体的密度为0.850-0.900g/cm 3，所述弹性体的熔体质量流动速率为0.5-1.2g/10min，熔体质量流动速率根据ISO 1133使用2.16kg重量并在190℃的温度测量；所述弹性体为乙烯-丙烯共聚物、乙烯-己烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物、苯乙烯-丁二烯-苯乙烯共聚物、氢化苯乙烯-丁二烯-苯乙烯共聚物中的至少一种；
(b)所述填料为球形、片状或针状，所述填料为滑石粉、碳酸钙、硅灰石、硫酸钡、云母、硅微粉、二氧化硅、蒙脱土中的至少一种；
(c)所述加工助剂包括抗氧剂和光稳定剂。
作为本发明所述聚丙烯组合物的更优选实施方式，所述填料的平均粒径D50为2～20μm；所述抗氧剂由受阻酚类抗氧剂和亚磷酸酯类抗氧剂组成，所述受阻 酚类抗氧剂与亚磷酸酯类抗氧剂的重量比为1:(1～2)；所述光稳定剂为受阻胺类光稳定剂。
作为本发明所述聚丙烯组合物的优选实施方式，所述聚丙烯组合物由下述重量份的组分组成：聚丙烯44.5份，弹性体15份，填料40份，加工助剂0.5份；所述聚丙烯的分子量分布指数Mw/Mn为1；所述弹性体为乙烯-丁烯共聚物，所述弹性体的密度为0.862g/cm 3，所述弹性体的熔体质量流动速率为1.2g/10min，熔体质量流动速率根据ISO 1133使用2.16kg重量并在190℃的温度测量；所述填料为硅微粉；所述加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:2；所述光稳定剂为受阻胺UV-3853。研究表明，该特定的组成的聚丙烯组合物雾化度(光泽度法)高达94.8％。
第二方面，本发明提供了上述聚丙烯组合物的制备方法，其包括以下步骤：
(1)称取各组分，加入到高混机中混合1～3分钟，高混机的转速为1000～2000转/分钟，得到预混料；
(2)步骤(1)所得预混料经双螺杆挤出机熔融挤出，真空造粒即得所述聚丙烯组合物；其中，所述双螺杆挤出机的螺杆各区温度均为190～230℃。
第三方面，本发明提供了上述聚丙烯组合物在制备车用内饰件中的应用。
作为本发明所述应用的优选实施方式，所述车用内饰件为仪表板、副仪表板、立柱、手套箱、门板、门槛、车灯支架。
第四方面，本发明提供了一种车用内饰件，其含有上述聚丙烯组合物。
与现有技术相比，本发明的有益效果为：
(1)本发明通过对聚丙烯原料分子量分布的限定，采用所得聚丙烯组合物生产的制品具有超低的雾化度；
(2)本发明的聚丙烯组合物可广泛应用于仪表板、副仪表板、立柱、手套箱、门板、门槛、车灯支架等车用内饰件的生产，尤其适用于汽车用内饰件。
具体实施方式
为更好地说明本发明的目的、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。
下述实施例中，聚丙烯分子量分布Mw/Mn采用凝胶渗透色谱法测定，温度135℃，溶剂为1,3,4-三氯苯；弹性体的熔体质量流动速率(MFR)是根据ISO 1133使用2.16kg重量并在190℃的温度测量。
实施例1
本发明聚丙烯组合物的一种实施例，本实施例的聚丙烯组合物由下述重量份的组分组成：聚丙烯29份，弹性体30份，填料40份，加工助剂1份；
其中，聚丙烯采用Ziegler-Natta催化合成，聚丙烯的分子量分布指数Mw/Mn为3.5；所述弹性体为乙烯-丁烯共聚物，弹性体的密度为0.865g/cm 3，MFR(190℃，2.16kg)为0.5g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本实施例聚丙烯组合物的制备方法为：
(1)称取聚丙烯、弹性体、填料和加工助剂，加入到高混机中混合1～3分钟，转速为1000～2000转/分钟，得到预混料；
(2)步骤(1)所得预混料经双螺杆挤出机熔融挤出，真空造粒即得所述聚丙烯组合物；其中，所述双螺杆挤出机的螺杆各区温度均为190～230℃。
实施例2
本发明聚丙烯组合物的一种实施例，本实施例的聚丙烯组合物由下述重量份的组分组成：聚丙烯49.5份，弹性体30份，填料20份，加工助剂0.5份；
其中，聚丙烯采用茂金属催化合成，聚丙烯的分子量分布指数Mw/Mn为2；所述弹性体为乙烯-辛烯共聚物，弹性体的密度为0.900g/cm 3，MFR(190℃，2.16kg)为1.0g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺 UV-3853。
本实施例聚丙烯组合物的制备方法同实施例1。
实施例3
本发明聚丙烯组合物的一种实施例，本实施例的聚丙烯组合物由下述重量份的组分组成：聚丙烯79份，弹性体10份，填料10份，加工助剂1份；
其中，聚丙烯采用茂金属催化合成，聚丙烯的分子量分布指数Mw/Mn为2.5；所述弹性体为乙烯-丁烯共聚物，弹性体的密度为0.865g/cm 3，MFR(190℃，2.16kg)为0.5g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本实施例聚丙烯组合物的制备方法同实施例1。
实施例4
本发明聚丙烯组合物的一种实施例，本实施例的聚丙烯组合物由下述重量份的组分组成：聚丙烯59.9份，弹性体25份，填料15份，加工助剂0.1份；
其中，聚丙烯采用茂金属催化合成，聚丙烯的分子量分布指数Mw/Mn为2；所述弹性体为乙烯-辛烯共聚物，弹性体的密度为0.855g/cm 3，MFR(190℃，2.16kg)为1.0g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本实施例聚丙烯组合物的制备方法同实施例1。
实施例5
本发明聚丙烯组合物的一种实施例，本实施例的聚丙烯组合物由下述重量份的组分组成：聚丙烯90份，弹性体5份，填料5份，加工助剂0.1份；
其中，聚丙烯采用Ziegler-Natta催化合成，聚丙烯的分子量分布指数Mw/Mn为5；所述弹性体为乙烯-丙烯共聚物，弹性体的密度为0.850g/cm 3，MFR(190℃， 2.16kg)为1.0g/10min；填料为碳酸钙，球形，填料的平均粒径D50为2μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1.5；所述光稳定剂为受阻胺UV-3853。
本实施例聚丙烯组合物的制备方法同实施例1。
实施例6
本发明聚丙烯组合物的一种实施例，本实施例的聚丙烯组合物由下述重量份的组分组成：聚丙烯44.5份，弹性体15份，填料40份，加工助剂0.5份；
其中，聚丙烯采用茂金属催化合成，聚丙烯的分子量分布指数Mw/Mn为1；所述弹性体为乙烯-丁烯共聚物，弹性体的密度为0.862g/cm 3，所述弹性体的熔体质量流动速率为1.2g/10min；填料为硅微粉，球形，填料的平均粒径D50为20μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:2；所述光稳定剂为受阻胺UV-3853。
本实施例聚丙烯组合物的制备方法同实施例1。
对比例1
本对比例的聚丙烯组合物由下述重量份的组分组成：聚丙烯29份，弹性体30份，填料40份，加工助剂1份；
其中，聚丙烯采用Ziegler-Natta催化合成，聚丙烯的分子量分布指数Mw/Mn为6；所述弹性体为乙烯-丁烯共聚物，弹性体的密度为0.865g/cm 3，MFR(190℃，2.16kg)为0.5g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本对比例聚丙烯组合物的制备方法同实施例1。
对比例2
本对比例的聚丙烯组合物由下述重量份的组分组成：聚丙烯49.5份，弹性 体30份，填料20份，加工助剂0.5份；
其中，聚丙烯采用Ziegler-Natta催化合成，聚丙烯的分子量分布指数Mw/Mn为10；所述弹性体为乙烯-辛烯共聚物，弹性体的密度为0.900g/cm 3，MFR(190℃，2.16kg)为1.0g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本对比例聚丙烯组合物的制备方法同实施例1。
对比例3
本对比例的聚丙烯组合物由下述重量份的组分组成：聚丙烯79份，弹性体10份，填料10份，加工助剂1份；
其中，聚丙烯采用Ziegler-Natta催化合成，聚丙烯的分子量分布指数Mw/Mn为6；所述弹性体为乙烯-丁烯共聚物，弹性体的密度为0.865g/cm 3，MFR(190℃，2.16kg)为0.5g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本对比例聚丙烯组合物的制备方法同实施例1。
对比例4
本对比例的聚丙烯组合物由下述重量份的组分组成：聚丙烯59.9份，弹性体25份，填料15份，加工助剂0.1份；
其中，聚丙烯采用Ziegler-Natta催化合成，聚丙烯的分子量分布指数Mw/Mn为6；所述弹性体为乙烯-辛烯共聚物，弹性体的密度为0.855g/cm 3，MFR(190℃，2.16kg)为1.0g/10min；填料为滑石粉，片状，填料的平均粒径D50为10μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:1；所述光稳定剂为受阻胺UV-3853。
本对比例聚丙烯组合物的制备方法同实施例1。
实施例7
本实施例测定了实施例1～6以及对比例1～4聚丙烯组合物的雾化度(光泽度法)，测定的标准为ISO 6452-2007，测试条件为：加热温度(100±0.5)℃，加热时间(3±3)min，干燥时间(1±0.1)h，测定的结果如下表1所示。
表1
聚丙烯组合物 雾化度光泽度保持率％
实施例1 91.8
实施例2 92.8
实施例3 92.3
实施例4 92.5
实施例5 86
实施例6 94.8
对比例1 79
对比例2 68
对比例3 75.6
对比例4 78.1
从表1可看出，本发明通过对原料聚丙烯分子量分布的限定，制备的聚丙烯组合物雾度(光泽度法)均在85％以上，具有超低雾化度，超过材料标准对材料雾化度的要求。
实施例8
本实施例考察了聚丙烯组合物中聚丙烯的分子量分布指数对其雾化度的影响。为了考察该影响，本实施例按照本发明的方法制备不同的试验组聚丙烯组合物和对照组聚丙烯组合物，并按照实施例7所述方法测定了各试验组聚丙烯组合物和对照组聚丙烯组合物的雾化度。
试验组聚丙烯组合物和对照组聚丙烯组合物均由下述重量份的组分组成：聚丙烯29～90份，弹性体5～30份，填料5～40份，加工助剂0.1～1份；其中，弹性体的密度为0.850-0.900g/cm 3，弹性体的熔体质量流动速率为0.5-1.2g/10min，熔体质量流动速率根据ISO 1133使用2.16kg重量并在190℃的温度测量；所述弹性体为乙烯-丙烯共聚物、乙烯-己烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物、苯乙烯-丁二烯-苯乙烯共聚物、氢化苯乙烯-丁二烯-苯乙烯共聚物中的至少一种；填料为球形、片状或针状，所述填料为滑石粉、碳酸钙、硅灰石、硫酸钡、云母、硅微粉、二氧化硅、蒙脱土中的至少一种，填料的平均粒径D50为2～20μm；加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由受阻酚类抗氧剂和亚磷酸酯类抗氧剂组成，所述受阻酚类抗氧剂与亚磷酸酯类抗氧剂的重量比为1:(1～2)，所述光稳定剂为受阻胺类光稳定剂。试验组聚丙烯组合物和对照组聚丙烯组合物的制备同实施例1。
试验组聚丙烯组合物、对照组聚丙烯组合物仅聚丙烯的分子量分布指数Mw/Mn不同，其具体的分子量分布指数Mw/Mn以及雾化度见表2。
表2
聚丙烯组合物 分子量分布指数Mw/Mn 雾化度光泽度保持率％
试验组1 1 94.2
试验组2 2 92.6
试验组3 2.5 92
试验组4 3.5 91.2
试验组5 5 85.7
对照组1 5.5 78.6
对照组2 6 76.3
对照组3 8 70.1
对照组4 10 66.9
由表2可见，聚丙烯组合物中聚丙烯的分子量分布指数Mw/Mn影响其雾化度，在聚丙烯组合物中其他条件相同的情况下，聚丙烯的分子量分布指数Mw/Mn越低，聚丙烯组合物的雾化度越低，也就是雾化时玻片表面的光泽度保持率越高；而当聚丙烯的分子量分布指数Mw/Mn大于5时，其光泽度保持率急剧下降。
最后所应当说明的是，以上实施例仅用以说明本实用新型的技术方案而非对本实用新型保护范围的限制，尽管参照较佳实施例对本实用新型作了详细说明，本领域的普通技术人员应当理解，可以对本实用新型的技术方案进行修改或者等同替换，而不脱离本实用新型技术方案的实质和范围。

Claims (10)

  1. 一种聚丙烯组合物，其特征在于，包括聚丙烯，所述聚丙烯的分子量分布指数Mw/Mn不大于5。
  2. 如权利要求1所述的聚丙烯组合物，其特征在于，所述聚丙烯的分子量分布指数Mw/Mn为1-5。
  3. 如权利要求1所述的聚丙烯组合物，其特征在于，所述聚丙烯的分子量分布指数Mw/Mn为1-3.5。
  4. 如权利要求1～3任一项所述的聚丙烯组合物，其特征在于，包括下述重量份的组分：聚丙烯29～90份，弹性体5～30份，填料5～40份，加工助剂0.1～1份。
  5. 如权利要求4所述的聚丙烯组合物，其特征在于，如下(a)～(c)中的至少一种：
    (a)所述弹性体的密度为0.850-0.900g/cm 3，所述弹性体的熔体质量流动速率为0.5-1.2g/10min，熔体质量流动速率根据ISO1133使用2.16kg重量并在190℃的温度测量；所述弹性体为乙烯-丙烯共聚物、乙烯-己烯共聚物、乙烯-丁烯共聚物、乙烯-辛烯共聚物、苯乙烯-丁二烯-苯乙烯共聚物、氢化苯乙烯-丁二烯-苯乙烯共聚物中的至少一种；
    (b)所述填料为球形、片状或针状，所述填料为滑石粉、碳酸钙、硅灰石、硫酸钡、云母、硅微粉、二氧化硅、蒙脱土中的至少一种；
    (c)所述加工助剂包括抗氧剂和光稳定剂。
  6. 如权利要求5所述的聚丙烯组合物，其特征在于，所述填料的平均粒径D50为2～20μm；所述抗氧剂由受阻酚类抗氧剂和亚磷酸酯类抗氧剂组成，所述受阻酚类抗氧剂与亚磷酸酯类抗氧剂的重量比为1:(1～2)；所述光稳定剂为受阻胺类光稳定剂。
  7. 如权利要求6所述的聚丙烯组合物，其特征在于，所述聚丙烯组合物由下述重量份的组分组成：聚丙烯44.5份，弹性体15份，填料40份，加工助剂 0.5份；所述聚丙烯的分子量分布指数Mw/Mn为1；所述弹性体为乙烯-丁烯共聚物，所述弹性体的密度为0.862g/cm 3，所述弹性体的熔体质量流动速率为1.2g/10min，熔体质量流动速率根据ISO1133使用2.16kg重量并在190℃的温度测量；所述填料为硅微粉；所述加工助剂由抗氧剂和光稳定剂组成，所述抗氧剂由抗氧剂1010和抗氧剂168组成，所述抗氧剂1010与抗氧剂168的重量比为1:2；所述光稳定剂为受阻胺UV-3853。
  8. 如权利要求1～7任一项所述聚丙烯组合物的制备方法，其特征在于，包括以下步骤：
    (1)称取各组分，加入到高混机中混合1～3分钟，高混机的转速为1000～2000转/分钟，得到预混料；
    (2)步骤(1)所得预混料经双螺杆挤出机熔融挤出，真空造粒即得所述聚丙烯组合物；其中，所述双螺杆挤出机的螺杆各区温度均为190～230℃。
  9. 如权利要求1～7任一项所述聚丙烯组合物在制备车用内饰件中的应用。
  10. 一种车用内饰件，其特征在于，含有权利要求1～7任一项所述聚丙烯组合物。
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