WO2021164353A1 - 一种无锑阻燃聚丙烯组合物及其制备方法 - Google Patents

一种无锑阻燃聚丙烯组合物及其制备方法 Download PDF

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WO2021164353A1
WO2021164353A1 PCT/CN2020/130127 CN2020130127W WO2021164353A1 WO 2021164353 A1 WO2021164353 A1 WO 2021164353A1 CN 2020130127 W CN2020130127 W CN 2020130127W WO 2021164353 A1 WO2021164353 A1 WO 2021164353A1
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retardant
antimony
flame
polypropylene composition
free flame
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PCT/CN2020/130127
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English (en)
French (fr)
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杨友强
黄险波
叶南飚
姜向新
陆湛泉
丁明笃
程书文
刘乐文
杨霄云
程文建
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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
    • 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
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates
    • 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
    • C08K3/32—Phosphorus-containing compounds
    • C08K2003/321—Phosphates
    • C08K2003/325—Calcium, strontium or barium phosphate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets

Definitions

  • the invention belongs to the field of polymer materials, and specifically relates to an antimony-free flame-retardant polypropylene composition and a preparation method thereof.
  • Polypropylene has become one of the most widely used general-purpose plastics due to its excellent comprehensive properties, good cost performance, and wide processing and molding conditions. Polypropylene is a typical flammable material. Its limiting oxygen index is 17-18%. It is extremely flammable and cannot self-extinguish after a fire. With the gradual improvement of material safety requirements, polypropylene materials must be flame-retardant modified.
  • Flame retardants used in polypropylene are mainly divided into environmentally friendly brominated flame retardants and halogen-free flame retardants.
  • the existing flame-retardant modified polypropylene materials in order to meet the requirements of halogen-free, it is necessary to add phosphorus and nitrogen. Or its compound system flame retardant, but the halogen-free flame retardant system has the disadvantages of large addition, low flame retardant efficiency, poor physical properties (especially insufficient toughness), high water absorption, etc., and its wide application still has major limitations sex.
  • Environmentally friendly bromine-containing flame retardants are still the main flame retardants for polypropylene resins.
  • Brominated flame retardants have the advantages of high flame retardant efficiency, excellent heat resistance, and less impact on physical properties, but brominated flame retardants are generally required Used together with antimony compounds (mainly antimony trioxide), it has the disadvantages of high smoke density and high toxicity during combustion. In addition, because antimony itself will bring some environmental protection and carcinogenic risks, it will cause environmental pollution and endanger the safety of employees during the production and processing process, so there are more restrictions on the application. With the continuous improvement of application requirements in downstream industries, more and more products and safety regulations hope that materials can reach the V-0 flame retardant level, and the amount of smoke emitted as little as possible, and antimony is used as a rare element in flame retardants. It will bring about a decrease in mineral resources, and it has been restricted in some regulations (such as California Act No. 65). Therefore, the study of an antimony-free flame-retardant polypropylene composition has excellent industrial application prospects.
  • antimony compounds mainly antimony trioxide
  • the primary purpose of the present invention is to provide an antimony-free flame-retardant polypropylene composition, which has excellent flame-retardant properties and toughness, higher oxygen index and lower smoke density.
  • Another object of the present invention is to provide a method for preparing the antimony-free flame-retardant polypropylene composition.
  • An antimony-free flame-retardant polypropylene composition in parts by weight, comprising the following components:
  • the polypropylene is selected from one or a mixture of two of homo-polypropylene or co-polypropylene.
  • the brominated flame retardant is an organic brominated flame retardant, specifically selected from the group consisting of decabromodiphenylethane, tris(tribromoneopentyl) phosphate, and tris(2,3-dibromopropyl) Isocyanurate, tetrabromobisphenol A bis(2,3-dibromopropyl) ether, tetrabromobisphenol S bis(2,3-dibromopropyl) ether or ethyl-bis(tetrabromopropyl) Phthalimide) one or a mixture of several, from the point of view of material heat resistance and flame retardant efficiency, preferably decabromodiphenylethane or ethyl-bis(tetrabromophthalimide) Imine).
  • organic brominated flame retardant specifically selected from the group consisting of decabromodiphenylethane, tris(tribromoneopentyl) phosphate, and
  • the brominated flame retardant of the present invention is added in 15-25 parts, preferably 18-22 parts.
  • the added amount is too small, the flame retardant The effect will be correspondingly worse.
  • the addition amount is less than 15 parts, the flame retardant stability will decrease; when the addition amount is too high, there is no significant difference in the flame retardant performance, but the material toughness will decrease and the smoke density will increase.
  • the inorganic barium compound is selected from one or a mixture of precipitated barium sulfate, barite, barium titanate, or barium phosphate, and is preferably precipitated barium sulfate or barium phosphate.
  • the addition amount of the inorganic barium compound of the present invention is 1-10 parts.
  • the addition amount is too small, the flame retardant efficiency is insufficient and the flame retardant grade is low;
  • the addition amount is too high, there is no significant difference in flame retardant performance.
  • the silicone flame-retardant lubricant is selected from one or a mixture of SFR-100, dimethyl silicone oil or vinyl silicone oil, and more preferably SFR-100 or vinyl silicone oil.
  • the antimony-free flame-retardant polypropylene composition of the present invention in parts by weight, also includes 0-25 parts of talc, 0-1 parts of antioxidants and 0-1 parts of processing aids. share.
  • the antioxidant is selected from one or a mixture of phenols, phosphites, divalent sulfur or hindered amine antioxidants, wherein the phenolic antioxidants include Antioxidant 264, Antioxidant 1010, Antioxidant 1076, Antioxidant SP, Antioxidant 2246, Antioxidant CA, Antioxidant 330, Irganox 1890 or Antioxidant 3114, Phosphites have antioxidant TNP , Antioxidant ODP, Antioxidant 168, Irganox1093 or Irganox1222, divalent sulfur antioxidants include dilaurate thiodipropionate (DLTP), distearate thiodipropionate (DSTP), Hindered amine antioxidants include LS-744, LS-770, GW-540 or Flamstab NOR116.
  • the phenolic antioxidants include Antioxidant 264, Antioxidant 1010, Antioxidant 1076, Antioxidant SP, Antioxidant 2246, Antioxidant CA, Antioxidant 330, Irg
  • the processing aid is selected from one or more of low molecular weight lipids, metal soaps, stearic acid complex esters, and amides, wherein the low molecular weight lipids are solid paraffin, liquid paraffin or low molecular weight Molecular polyolefin wax, metal soaps are calcium stearate, magnesium stearate, zinc stearate or barium stearate, stearic acid complex esters are ethylene glycol stearate, glyceryl stearate or Stearic acid pentaerythritol ester, amides are erucamide, methylene bisstearic acid amide or N,N-ethylene bisstearic acid amide.
  • the present invention also provides a preparation method of the antimony-free flame-retardant polypropylene composition, which includes the following steps:
  • the components After weighing the components in proportion, the components are mixed uniformly through a high-speed mixer, and then melt-extruded and pelletized through a twin-screw extruder at 180-200°C, and dried to obtain antimony-free flame-retardant polypropylene combination.
  • the present invention has the following beneficial effects:
  • the present invention uses an inorganic barium compound, a silicon-based flame-retardant lubricant and a bromine-based flame retardant to synergistically use the inorganic barium compound as the Lewis acid and the bromine-based flame retardant, and the silicon-based flame-retardant lubricant promotes both Compatibility, adding a small amount of brominated flame retardant (15-25 parts) can make the flame-retardant polypropylene pass the vertical combustion V-0 test, and the oxygen index>25% and the smoke density ⁇ 70, it is very efficient Flame-retardant effect, the prepared flame-retardant polypropylene composition has excellent flame-retardant performance and toughness, and has a higher oxygen index and lower smoke density. It can be made into products according to different uses, especially suitable for electronic and electrical products , Has excellent industrial application prospects;
  • the flame-retardant polypropylene composition of the present invention utilizes the synergistic effect of inorganic barium compounds and silicon-based flame-retardant lubricants on bromine-based flame retardants, thereby replacing the traditional bromine-antimony flame-retardant mechanism, and has excellent flame-retardant properties.
  • the antimony halide gas since the antimony halide gas is no longer generated, it can effectively reduce the toxic and harmful gases generated during the combustion process of the material, and reduce the smoke emission during product combustion;
  • the raw materials are all commonly used commercially available materials, no special chemicals, the preparation process is simple and feasible, the equipment requirements are low, the product has a high comprehensive cost performance, and can be prepared according to different uses.
  • Various flame-retardant products have excellent industrial application prospects.
  • Polypropylene resin homopolypropylene: PP HP500N, CNOOC and Shell;
  • Polypropylene resin copolymer polypropylene: PP K9010, Taiwan Chemical Group;
  • Brominated flame retardant ethyl-bis(tetrabromophthalimide), Israel Chemical Group;
  • Antioxidant 1010 Tianjin Li'anlong New Material Co., Ltd.;
  • Antioxidant 168 Tianjin Li'anlong New Material Co., Ltd.;
  • Processing aid Calcium stearate, Zhongshan Huamingtai Chemical Co., Ltd.;
  • Inorganic barium compounds precipitated barium sulfate, barium phosphate, commercially available;
  • Silicone flame retardant lubricant vinyl silicone oil, SFR-100, commercially available;
  • Halogen-free flame retardant ammonium polyphosphate, Budenheim, Germany;
  • Antimony trioxide commercially available.
  • the related performance test standards or methods are as follows:
  • the thickness of the test sample is 1.6mm and 3.2mm;
  • SDR Smoke Density Test
  • Oxygen index test According to the test method of GB/T 2406.2, the thickness of the test sample is 4.0mm;
  • Notched impact strength of cantilever beam Tested in accordance with ISO 180 standard.
  • the present invention uses bromine-based flame retardants, inorganic barium compounds, and silicon-based flame-retardant lubricants.
  • the three have a synergistic effect. (15-25 parts), it can achieve good flame retardant effect on polypropylene resin, reaching vertical combustion V-0 level, oxygen index> 25%, and smoke density ⁇ 70.
  • Comparative Example 1 the bromine-based flame retardant was used alone, and the flame retardant effect was poor, the oxygen index was low, and the smoke density level was higher; in Comparative Example 2-3, the bromine-based flame retardant, inorganic barium compound, and bromine were used separately The combined use of flame retardant and silicon flame retardant lubricant has a slight increase in the oxygen index, but the increase is small, and the vertical combustion performance is not significantly improved.
  • Comparative Examples 4-5 the bromine-based flame retardant and antimony trioxide are used together, the oxygen index is lower, and the smoke density grade is not large.
  • Comparative Example 6 a large amount of halogen-free flame retardant was added, and the toughness of the material decreased significantly.

Abstract

本发明公开了一种无锑阻燃聚丙烯组合物及其制备方法，该组合物包括组分：聚丙烯树脂40-70份；溴系阻燃剂15-25份；无机钡化合物1-10份；硅系阻燃润滑剂0.1-3份。本发明采用无机钡化合物、硅系阻燃润滑剂和溴系阻燃剂协效并用，制备得到的阻燃聚丙烯组合物，在不添加锑元素进行协效的情况下就能获得优良的阻燃性能和韧性，且具有较高的氧指数及较低的烟密度，可以根据不同用途制成产品，尤其适用于电子电器产品，具有极佳的工业应用前景。

Description

一种无锑阻燃聚丙烯组合物及其制备方法 技术领域
本发明属于高分子材料领域，具体涉及一种无锑阻燃聚丙烯组合物及其制备方法。
背景技术
聚丙烯因其优异的综合性能和良好的性价比、较宽的加工成型条件成为应用最为广泛的通用塑料之一。聚丙烯是典型的易燃性材料，其极限氧指数为17-18％，极易燃烧，着火后不能自熄，随着材料安全要求的逐渐提高，聚丙烯材料必须进行阻燃改性。
用于聚丙烯的阻燃剂主要分为环保溴系阻燃剂和无卤阻燃剂，现有的阻燃改性聚丙烯材料中，为了满足无卤化的要求，需要选择添加含磷、氮或其复配体系的阻燃剂，但是无卤阻燃体系存在添加量大、阻燃效率低、物理性能较差(尤其是韧性不足)、吸水性高等缺点，广泛应用还存在较大的局限性。环保含溴阻燃剂仍然是聚丙烯树脂的主要阻燃剂，溴系阻燃剂具有阻燃效率高、耐热性能优异、对物理性能影响较小等优点，但溴系阻燃剂普遍需要与锑化合物(主要是三氧化二锑)一起使用，具有燃烧时烟密度大、毒性高等缺点。此外，由于锑本身会带来一些环保和致癌的风险，在生产加工过程中会导致环境污染和危害员工安全，因此在应用上限制较多。随着下游行业应用需求的不断提高，越来越多的产品和安全法规希望材料可达到V-0阻燃等级，以及尽可能少的烟气释放量，而锑作为稀有元素用于阻燃剂会带来矿产资源的减少，在部分法规(如美国加州65号法案)中已经被限制使用。因此研究一种无锑阻燃聚丙烯组合物具有极佳的工业应用前景。
发明内容
为了克服上述现有技术存在的不足，本发明的首要目的在于提供一种无锑阻燃聚丙烯组合物，该组合物具有优良的阻燃性能和韧性，较高的氧指数及较低的烟密度。
本发明的另一目的在于提供上述无锑阻燃聚丙烯组合物的制备方法。
本发明是通过以下技术方案实现的：
一种无锑阻燃聚丙烯组合物，按重量份数计，包括以下组分：
Figure PCTCN2020130127-appb-000001
作为优选，所述聚丙烯选自均聚聚丙烯或共聚聚丙烯中的一种或两种的混合。
作为优选，所述溴系阻燃剂为有机溴系阻燃剂，具体选自十溴二苯乙烷、三(三溴新戊基)磷酸酯、三(2，3-二溴丙基)异三聚氰酸酯、四溴双酚A双(2，3-二溴丙基)醚、四溴双酚S双(2，3-二溴丙基)醚或乙基-双(四溴苯邻二甲酰亚胺)中的一种或几种的混合，从材料耐热和阻燃效率角度出发，优选为十溴二苯乙烷或乙基-双(四溴苯邻二甲酰亚胺)。
从性能合理化角度出发，基于整个无锑阻燃聚丙烯组合物的总重量，本发明溴系阻燃剂的添加量为15-25份，优选为18-22份，添加量太少时，阻燃效果会相应差些，添加量少于15份时，阻燃稳定性会下降；添加量过高时，阻燃性能无显著差异，但材料韧性会下降、烟密度会增加。
作为优选，所述无机钡化合物选自沉淀硫酸钡、重晶石、钛酸钡或磷酸钡中的一种或几种的混合，优选为沉淀硫酸钡或磷酸钡。
从性能合理化角度出发，基于整个无锑阻燃聚丙烯组合物的总重量，本发明无机钡化合物的添加量为1-10份，添加量太少时，阻燃效率不足，阻燃等级较低；添加量过高时，阻燃性能无显著差异。
作为优选，所述硅系阻燃润滑剂选自SFR-100、二甲基硅油或乙烯基硅油中的一种或几种的混合，更优选为SFR-100或乙烯基硅油。
根据实际性能需要，本发明所述的一种无锑阻燃聚丙烯组合物，按重量份数计，还包括滑石粉0-25份，抗氧剂0-1份和加工助剂0-1份。
作为优选，所述抗氧剂选自酚类、亚磷酸酯类、二价硫类或受阻胺类抗氧剂中的一种或几种的混合，其中，所述的酚类抗氧剂有抗氧剂264、抗氧剂1010、抗氧剂1076、防老剂SP、抗氧剂2246、抗氧剂CA、抗氧剂330、Irganox1890或抗氧剂3114，亚磷酸酯类有抗氧剂TNP、抗氧剂ODP、抗氧剂168、Irganox1093或Irganox1222，二价硫类抗氧剂有二月桂酸硫代二丙酸酯(DLTP)、二硬脂酸硫代二丙酸酯(DSTP)，受阻胺类抗氧剂有LS-744、LS-770、GW-540或Flamstab NOR116。
作为优选，所述加工助剂选自低分子脂类、金属皂类、硬脂酸复合酯类、酰胺类中的一种或几种，其中，低分子脂类为固体石蜡、液体石蜡或低分子聚烯烃蜡，金属皂类为硬脂酸钙、硬脂酸镁、硬脂酸锌或硬脂酸钡，硬酯酸复合酯类为硬脂酸乙二醇酯、硬脂酸甘油酯或硬脂酸季戊四醇酯，酰胺类为芥酸酰胺、甲撑双硬脂酸酰胺或N，N-乙撑双硬脂酸酰胺。
本发明还提供了上述的无锑阻燃聚丙烯组合物的制备方法，包括如下步骤：
按比例称量各组分后，将各组分经过高速混合机混合均匀，然后通过双螺杆挤出机在180-200℃下熔融挤出、造粒，干燥后即得到无锑阻燃聚丙烯组合物。
与现有技术相比，本发明具有如下有益效果：
1)本发明采用无机钡化合物、硅系阻燃润滑剂和溴系阻燃剂协效并用，无机钡化合物作为路易斯酸与溴系阻燃剂协效，硅系阻燃润滑剂促进二者的相容性，在添加少量的溴系阻燃剂(15-25份)即可使阻燃聚丙烯通过垂直燃烧V-0测试，且氧指数>25％和烟密度<70，具有非常高效的阻燃效果，制备得到的阻燃聚丙烯组合物具有优良的阻燃性能和韧性，且具有较高的氧指数及较低的烟密度，可以根据不同用途制成产品，尤其适用于电子电器产品，具有极佳的工业应用前景；
2)本发明的阻燃聚丙烯组合物利用无机钡化合物、硅系阻燃润滑剂对溴系阻燃剂的协效作用，从而替代了传统的溴锑阻燃机理，在具有优异阻燃性能的同时，由于不再生成卤化锑气体，因此可以有效降低材料在燃烧过程中产生的有毒有害气体，减少了产品燃烧中的烟气释放；
3)本发明提供的阻燃聚丙烯组合物中，原料皆为市售常用材料，无特殊化学品，制备过程简单易行，对设备要求低，产品的综合性价比较高，可以根据不同用途制成各种阻燃产品，具有极佳的工业应用前景。
具体实施方式
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明，单不以任何形式限制本发明。应当指出的是，对本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进。这些都属于本发明的保护范围。
现对实施例及对比例所用的原材料做如下说明，但不限于这些材料：
聚丙烯树脂：均聚聚丙烯：PP HP500N，中海壳牌；
聚丙烯树脂：共聚聚丙烯：PP K9010，台化集团；
溴系阻燃剂：十溴二苯乙烷，以色列化工集团；
溴系阻燃剂：乙基-双(四溴苯邻二甲酰亚胺)，以色列化工集团；
抗氧剂1010，天津利安隆新材料股份有限公司；
抗氧剂168，天津利安隆新材料股份有限公司；
加工助剂：硬脂酸钙，中山华明泰化工股份有限公司；
无机钡化合物：沉淀硫酸钡、磷酸钡，市售；
硅系阻燃润滑剂：乙烯基硅油、SFR-100，市售；
滑石粉，市售；
无卤阻燃剂：聚磷酸铵，德国Budenheim公司；
三氧化二锑：市售。
相关性能的测试标准或方法如下：
垂直燃烧的测试方法：按照UL94标准，测试样条厚度为1.6mm、3.2mm；
烟密度等级测试(SDR)：按照GB/T 8627的测试方法，测试样条厚度为6.0mm；
氧指数测试：按照GB/T 2406.2的测试方法，测试样条厚度为4.0mm；
悬臂梁缺口冲击强度：按照ISO 180标准进行测试。
实施例1-10和对比例1-6：
按表1的配比，按比例称量各组分后，将各组分经过高速混合机混合均匀，然后通过双螺杆挤出机在200℃下熔融挤出，造粒，干燥后即得到阻燃聚丙烯组合物；对实施例和对比例制备得到的阻燃聚丙烯组合物的垂直阻燃、氧指数、烟密度进行测试，结果列于表1中。
表1实施例和对比例各组份的具体配比及性能结果(重量份)
Figure PCTCN2020130127-appb-000002
续表1：
Figure PCTCN2020130127-appb-000003
Figure PCTCN2020130127-appb-000004
从表1的实施例和对比例的比较可以看出：本发明使用溴系阻燃剂、无机钡化合物、硅系阻燃润滑剂并用，三者产生协同作用，在添加少量的阻燃剂含量(15-25份)，即可实现对聚丙烯树脂的良好阻燃效果，达到垂直燃烧V-0级、氧指数>25％，烟密度<70。而对比例1中单独使用溴系阻燃剂，阻燃效果较差，氧指数低，且烟密度等级较大；对比例2-3中，分别使用溴系阻燃剂与无机钡化合物、溴系阻燃剂与硅系阻燃润滑剂并用，氧指数略有提升，但提升幅度较小，而垂直燃烧性能无明显提升。对比例4-5中，将溴系阻燃剂与三氧化二锑并用，氧指数更低，且烟密度等级非较大。对比例6中添加大量的无卤阻燃剂，材料的韧性下降明显。

Claims (9)

  1. 一种无锑阻燃聚丙烯组合物，其特征在于，按重量份数计，包括以下组分：
    Figure PCTCN2020130127-appb-100001
  2. 根据权利要求1所述的一种无锑阻燃聚丙烯组合物，其特征在于，所述聚丙烯选自均聚聚丙烯或共聚聚丙烯中的一种或两种的混合。
  3. 根据权利要求1所述的一种无锑阻燃聚丙烯组合物，其特征在于，所述溴系阻燃剂为有机溴系阻燃剂，具体选自十溴二苯乙烷、三(三溴新戊基)磷酸酯、三(2，3-二溴丙基)异三聚氰酸酯、四溴双酚A双(2，3-二溴丙基)醚、四溴双酚S双(2，3-二溴丙基)醚或乙基-双(四溴苯邻二甲酰亚胺)中的一种或几种的混合，优选为十溴二苯乙烷或乙基-双(四溴苯邻二甲酰亚胺)。
  4. 根据权利要求3所述所述的一种无锑阻燃聚丙烯组合物，其特征在于，基于整个无锑阻燃聚丙烯组合物的总重量，所述溴系阻燃剂的添加量为18-22份。
  5. 根据权利要求1所述所述的一种无锑阻燃聚丙烯组合物，其特征在于，所述无机钡化合物选自沉淀硫酸钡、重晶石、钛酸钡或磷酸钡中的一种或几种的混合，优选为沉淀硫酸钡或磷酸钡。
  6. 根据权利要求1所述的一种无锑阻燃聚丙烯组合物，其特征在于，所述硅系阻燃润滑剂选自SFR-100、二甲基硅油或乙烯基硅油中的一种或几种的混合，优选为SFR-100或乙烯基硅油。
  7. 根据权利要求1-6任一项所述的一种无锑阻燃聚丙烯组合物，其特征在于，按重量份数计，还包括滑石粉0-25份、抗氧剂0-1份和加工助剂0-1份。
  8. 根据权利要求7所述所述的一种无锑阻燃聚丙烯组合物，其特征在于，所述抗氧剂选自酚类、亚磷酸酯类、二价硫类或受阻胺类抗氧剂中的一种或几种的混合；所述加工助剂选自低分子脂类、金属皂类、硬脂酸复合酯类或酰胺类中的一种或几种。
  9. 根据权利要求1-8任一项所述的无锑阻燃聚丙烯组合物的制备方法，其特征在于，包括如下步骤：
    按比例称量各组分后，将各组分经过高速混合机混合均匀，然后通过双螺杆挤出机在180-200℃下熔融挤出、造粒，干燥后即得到无锑阻燃聚丙烯组合物。
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