WO2018153230A1 - 一种耐刮擦母粒和其制备方法与应用以及由其组成的热塑性复合材料 - Google Patents

一种耐刮擦母粒和其制备方法与应用以及由其组成的热塑性复合材料 Download PDF

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WO2018153230A1
WO2018153230A1 PCT/CN2018/074796 CN2018074796W WO2018153230A1 WO 2018153230 A1 WO2018153230 A1 WO 2018153230A1 CN 2018074796 W CN2018074796 W CN 2018074796W WO 2018153230 A1 WO2018153230 A1 WO 2018153230A1
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scratch
resistant masterbatch
polyethylene
thermoplastic composite
molecular weight
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French (fr)
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俞飞
吴国峰
杨波
丁正亚
罗忠富
钱志军
陈业中
李伟
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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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • 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
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
    • C08L81/02—Polythioethers; Polythioether-ethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2310/00—Masterbatches

Definitions

  • the invention relates to the technical field of polymer material modification, in particular to a scratch-resistant masterbatch, a preparation method and application thereof and a thermoplastic composite material composed thereof.
  • Ultrahigh molecular weight polyethylene (UHMWPE for short) has a very high molecular weight (number average molecular weight of at least 1.5 million or more, while ordinary high density polyethylene HDPE has a number average molecular weight of usually only 20,000 to 300,000), which gives it excellent performance, and It is a moderately priced and excellent thermoplastic engineering plastic. It has almost all the advantages of various plastics. It has unmatched wear resistance, impact resistance, self-lubrication, corrosion resistance, impact energy absorption and resistance to ordinary polyethylene and other engineering plastics. Low temperature, hygienic non-toxic, not easy to adhere, not easy to absorb water, low density and other comprehensive properties.
  • Cubic boron nitride has a crystal structure similar to that of diamond, and its hardness is slightly lower than that of diamond (Note: the Mohs hardness of diamond is 10, the Mohs hardness of cubic boron nitride is 9.5, the Mohs hardness of corundum is 9.0), which is often used as abrasives and Tool material. From the current point of view, the combination of ultra high molecular weight polyethylene and cubic boron nitride in the plastics industry as a wear resistant filler has not been reported.
  • amides and silicones.
  • CN 101864115 B uses silicone powder for improved scratch resistance, and ⁇ L is 0.34 to 0.82 under 10N load; as in CN 103524976 B, amides are used for improved scratch resistance, and ⁇ L is 0.96 to 1.81 under 10N load.
  • the amount of silicone added is large, and the effect is general; the amide is not resistant to high temperature and is easily precipitated.
  • Another object of the present invention is to provide a method of preparing the above-described scratch resistant masterbatch.
  • thermoplastic composite comprising the above-described scratch resistant masterbatch.
  • a scratch-resistant masterbatch in parts by weight, comprising the following components:
  • the ultrahigh molecular weight polyethylene has a number average molecular weight of 3 million to 8,000,000.
  • the scratch resistance function is lowered.
  • the cubic boron nitride has a particle diameter of 1250 mesh to 2000 mesh.
  • the scratch resistance function is lowered; when the particle size of cubic boron nitride is too large, it is difficult to disperse.
  • the polyethylene in the polyethylene grafted maleic anhydride is a high density polyethylene, and the maleic anhydride graft ratio is from 1% to 2%.
  • the graft ratio of maleic anhydride in polyethylene grafted maleic anhydride is too low, the compatibility of ultrahigh molecular weight polyethylene with cubic boron nitride is lowered.
  • the processing aid is selected from one or more of dimethicone, an antioxidant, and a lubricant;
  • the antioxidant is a hindered phenol and a phosphite, and the ratio of the two is 4:1. -1:4.
  • a method for preparing the above scratch resistant masterbatch comprises the following steps:
  • the cubic boron nitride is placed at a high temperature of 200-300 ° C for 10-30 minutes, and then the ultra-high molecular weight polyethylene, polyethylene grafted maleic anhydride, processing aid is placed in an internal mixer for density. For 40-60 minutes, add the dense mixture to a single screw extruder with a single screw diameter of 55mm-65mm, a length to diameter ratio of 18-22:1, and a screw speed of 80RPM-120RPM at 150-200°C. Granulation is carried out to obtain a scratch resistant masterbatch.
  • the invention also discloses the use of the above-mentioned scratch-resistant masterbatch in a thermoplastic composite.
  • thermoplastic composite comprising the above-described scratch-resistant masterbatch.
  • the scratch-resistant masterbatch is added in an amount of from 0.3 to 3% by weight based on the total weight of the entire thermoplastic composite.
  • thermoplastic composite material The preparation method of the thermoplastic composite material can be achieved by the following steps:
  • thermoplastic polymer, carbon black and/or talc powder and the above-mentioned scratch-resistant masterbatch are mixed at a normal temperature for 6 minutes at a mixing speed of 160 rpm according to the ratio, and the mixed blend is passed through a twin-screw extrusion.
  • Extrusion granulation the temperature of each zone of the extruder from the feeding section to the head temperature is 200 ° C, 220 ° C, 220 ° C, 220 ° C, 220 ° C, 215 ° C, the screw length to diameter ratio is 40, the screw diameter is 42mm, screw speed is 450 rev / min, feeding speed is 38 rev / min, that is.
  • the thermoplastic polymer may be selected from one or more of polypropylene, polyethylene, polyamide 66, polyamide 6, and polyphenylene sulfide.
  • the invention has the following beneficial effects:
  • the present invention prepares a scratch-resistant mother by compounding a specific number average molecular weight ultrahigh molecular weight polyethylene, a specific particle diameter of cubic boron nitride, and a specific maleic anhydride graft ratio of polyethylene grafted maleic anhydride.
  • the granules are added to the thermoplastic composite material, so that the wear resistance and scratch resistance of the prepared thermoplastic composite material are remarkably improved.
  • the scratch-resistant masterbatch of the invention has simple process, convenient use and wide practicability.
  • Ultra high molecular weight polyethylene-1 number average molecular weight of 3 million, Ticona, USA;
  • Ultra High Molecular Weight Polyethylene-2 number average molecular weight of 8 million, Ticona, USA;
  • Ultra high molecular weight polyethylene-3 number average molecular weight of 1 million, Ticona, USA;
  • Cubic boron nitride-1 particle size of 1250 mesh, Tianyuan Institute of Chemical Research;
  • Cubic boron nitride-2 particle size of 2000 mesh, Tianyuan Institute of Chemical Research;
  • Cubic boron nitride-3 particle size of 800 mesh, Tianyuan Institute of Chemical Research;
  • Cubic boron nitride-4 particle size of 3000 mesh, Tianyuan Institute of Chemical Research;
  • Polyethylene grafted maleic anhydride-1 maleic anhydride grafting rate of 1%, Nantong Risheng;
  • Polyethylene grafted maleic anhydride-2 maleic anhydride grafting rate of 2%, Nantong Risheng;
  • Polyethylene grafted maleic anhydride-3 maleic anhydride grafting rate of 0.5%, Nantong Risheng;
  • Antioxidant-1 hindered phenols (antioxidant 1010) and phosphites (antioxidant 168), the mass ratio of the two is 1:2, American Albemarle;
  • Antioxidant-2 hindered phenols (antioxidant 1010) and phosphites (antioxidant 168), the mass ratio of the two is 2:1, American Albemarle;
  • Antioxidant-3 hindered phenols (antioxidant 1010) and phosphites (antioxidant 168), the mass ratio of the two is 1:6, American Albemarle.
  • Thermoplastic polymer Polypropylene: K7926 Shanghai Secco;
  • Polyamide 6 M2500I Xinhui Meida
  • Polyethylene HDPE8008 Dushanzi;
  • Talc powder AH51210 Liaoning Aihai
  • Silicone powder HMB-0221 American Dow Corning
  • Erucamide Erucamide Nantong Hongdao Chemical.
  • Friction performance (dry grinding): Perform GB 3960, injection molding into 100mm*100mm*3mm light board for testing; scratch resistance: according to the standard of PV3952 of Volkswagen main engine factory, injection into 150mm*100mm*3mm STUCCO leather pattern board, use special The cross-cutting instrument and the color difference meter were subjected to a scratch test using a force of 20 N, and then the color difference meter was used to test the brightness change ⁇ L value at the scratch, and the smaller the ⁇ L value, the better the scratch resistance.
  • the cubic boron nitride is placed at a high temperature of 200-300 ° C for 10-30 minutes, and then grafted with ultra-high molecular weight polyethylene, polyethylene grafted maleic anhydride, processing aid into the mixer
  • the mixture is kneaded for 40-60 minutes, and the mixed mixture is added to a single screw extruder having a single screw diameter of 55 mm to 65 mm, a length to diameter ratio of 18 to 22:1, and a screw rotation speed of 80 RPM to 120 RPM.
  • Granulation was carried out at 200 ° C to obtain a scratch-resistant master batch.
  • thermoplastic polymer, carbon black and/or talc, the scratch-resistant masterbatch or silicone powder or erucamide shown in Table 1 were mixed at room temperature for 6 min at a high speed mixer, and the mixing speed was 160 rpm. /min, the mixed blend is extruded and granulated by a twin-screw extruder.
  • the temperature of each zone of the extruder is 200 ° C, 220 ° C, 220 ° C, 220 ° C, 220 from the feeding section to the head temperature.
  • the screw length to diameter ratio is 40
  • the screw diameter is 42 mm
  • the screw speed is 450 rpm
  • the feeding speed is 38 rpm.
  • the extruded particles are injected into a standard sample for testing by a single screw injection molding machine.
  • the temperature of the single screw injection is 220 ° C, 230 ° C, 230 ° C, 235 ° C, 235 ° C, 230 ° C from feeding to the machine head.
  • the length-to-diameter ratio of the injection molding machine is 30, the screw rotation speed is 150 rev/min, the injection pressure is 80 MPa, the screw back pressure is 8 MPa, the injection time is 10 s, and the cooling time is 6 s; the wear resistance and scratch resistance of the obtained thermoplastic composite material
  • Table 2 The results of the rubbing test are shown in Table 2.

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
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  • Compositions Of Macromolecular Compounds (AREA)
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Abstract

本发明公开了一种耐刮擦母粒，按重量份数计，包括如下组分：超高分子量聚乙烯　100份；立方氮化硼　101份-300份；聚乙烯接枝马来酸酐　10份-30份；加工助剂　0-6份。本发明还公开了上述耐刮擦母粒的制备方法与应用以及由其组成的热塑性复合材料。本发明通过将特定数均分子量的超高分子量聚乙烯、特定粒径的立方氮化硼以及特定马来酸酐接枝率的聚乙烯接枝马来酸酐进行复配制备得到耐刮擦母粒，将其加入到热塑性复合材料中，使得制备得到的热塑性复合材料的耐磨性和耐刮擦性得到明显提高。

Description

一种耐刮擦母粒和其制备方法与应用以及由其组成的热塑性复合材料 技术领域
本发明涉及高分子材料改性技术领域，特别涉及一种耐刮擦母粒和其制备方法与应用以及由其组成的热塑性复合材料。
背景技术
超高分子量聚乙烯(简称UHMWPE)具有极高的分子量(数均分子量至少在150万以上，而普通的高密度聚乙烯HDPE数均分子量通常只有2～30万)赋予其优异的使用性能，而且属于价格适中、性能优良的热塑性工程塑料，它几乎集中了各种塑料的优点，具有普通聚乙烯和其它工程塑料无可比拟的耐磨、耐冲击、自润滑、耐腐蚀、吸收冲击能、耐低温、卫生无毒、不易粘附、不易吸水、密度较小等综合性能。
立方氮化硼其晶体结构类似金刚石，硬度略低于金刚石(注：金刚石的莫氏硬度为10，立方氮化硼的莫氏硬度为9.5，刚玉的莫氏硬度为9.0)，常用作磨料和刀具材料。从目前来看，将超高分子量聚乙烯和立方氮化硼结合应用于塑料行业作为耐磨填料尚未见报道。
目前国内外报道较多的改善耐刮擦一般添加耐刮擦剂，常用耐刮擦剂有两类：酰胺类和硅酮类。如CN 101864115 B中使用硅酮粉进行改善耐刮擦，10N载荷下△L为0.34～0.82；如CN 103524976 B中就使用了酰胺类进行改善耐刮擦，10N载荷下△L为0.96～1.81。硅酮添加量大，效果一般；酰胺不耐高温容易析出。
发明内容
为了克服现有技术的不足与缺陷，本发明的首要目的是提供一种添加量少，耐刮擦性能优异、不存在析出风险的耐刮擦母粒。
本发明的另一目的是提供上述耐刮擦母粒的制备方法。
本发明的再一目的是提供上述耐刮擦母粒的用途。
本发明的又一目的是提供包含上述耐刮擦母粒的热塑性复合材料。
本发明上述目的通过如下技术方案予以实现：
一种耐刮擦母粒，按重量份数计，包括如下组分：
Figure PCTCN2018074796-appb-000001
其中，所述超高分子量聚乙烯的数均分子量为300万-800万。当超高分子量聚乙烯的数均分子量过低，会降低耐刮擦功能。
其中，所述立方氮化硼的粒径为1250目-2000目。当立方氮化硼的粒径过小，会降低耐刮擦功能；当立方氮化硼的粒径过大，不易分散。
其中，所述聚乙烯接枝马来酸酐中的聚乙烯为高密度聚乙烯，马来酸酐接枝率在1％-2％。当聚乙烯接枝马来酸酐中的马来酸酐接枝率过低，会降低超高分子量聚乙烯与立方氮化硼的相容性。
其中，所述加工助剂选自二甲基硅油、抗氧剂、润滑剂中的一种或几种；所述抗氧剂为受阻酚类和亚磷酸酯类，两者比例为4:1-1:4。
一种上述耐刮擦母粒的制备方法，包括如下步骤：
按照配比将立方氮化硼放置于200～300℃高温下处理10-30分钟后，再与超高分子量聚乙烯、聚乙烯接枝马来酸酐、加工助剂放入密炼机中进行密炼40-60分钟，再将该密炼好的混合物加入到单螺杆直径55mm-65mm，长径比18-22：1，螺杆转速80RPM-120RPM的单螺杆挤出机中在150～200℃下进行造粒，得到耐刮擦母粒。
本发明还公开了上述耐刮擦母粒在热塑性复合材料中的应用。
此外，本发明还公开了一种热塑性复合材料，包含上述耐刮擦母粒。
优选地，所述耐刮擦母粒的添加量为整个热塑性复合材料总重量的0.3-3wt％。
所述热塑性复合材料的制备方法，可以通过如下步骤实现：
按照配比将热塑性聚合物、炭黑和/或滑石粉、上述耐刮擦母粒经高速混合机常温混合6min，混合速度为160转/min，将混合后的共混物通过双螺杆挤出机挤 出造粒，挤出机的各区温度从喂料段到机头温度依次为200℃、220℃、220℃、220℃、220℃、215℃，螺杆长径比为40，螺杆直径为42mm，螺杆转速为450转/分钟，喂料速度为38转/分钟，即得。
所述热塑性聚合物可以选自聚丙烯、聚乙烯、聚酰胺66、聚酰胺6、聚苯硫醚中一种或几种。
本发明与现有技术相比，具有如下有益效果：
1)本发明通过将特定数均分子量的超高分子量聚乙烯、特定粒径的立方氮化硼以及特定马来酸酐接枝率的聚乙烯接枝马来酸酐进行复配制备得到耐刮擦母粒，将其加入到热塑性复合材料中，使得制备得到的热塑性复合材料的耐磨性和耐刮擦性得到明显提高。
2)本发明的耐刮擦母粒的工艺简单，使用方便，实用性广。
具体实施方式
下面通过具体实施方式来进一步说明本发明，以下实施例为本发明较佳的实施方式，但本发明的实施方式并不受下述实施例的限制。
本发明的实施例及对比例采用如下原料，但不仅限于这些原料：
超高分子量聚乙烯-1：数均分子量为300万，美国泰科纳；
超高分子量聚乙烯-2：数均分子量为800万，美国泰科纳；
超高分子量聚乙烯-3：数均分子量为100万，美国泰科纳；
立方氮化硼-1：粒径为1250目，天元化研所；
立方氮化硼-2：粒径为2000目，天元化研所；
立方氮化硼-3：粒径为800目，天元化研所；
立方氮化硼-4：粒径为3000目，天元化研所；
聚乙烯接枝马来酸酐-1：马来酸酐接枝率为1％，南通日之升；
聚乙烯接枝马来酸酐-2：马来酸酐接枝率为2％，南通日之升；
聚乙烯接枝马来酸酐-3：马来酸酐接枝率为0.5％，南通日之升；
加工助剂：二甲基硅油：PMX-200，道康宁；
抗氧剂-1：受阻酚类(抗氧剂1010)和亚磷酸酯类(抗氧剂168)，两者质量比为1:2，美国雅宝；
抗氧剂-2：受阻酚类(抗氧剂1010)和亚磷酸酯类(抗氧剂168)，两者质量比为2:1，美国雅宝；
抗氧剂-3：受阻酚类(抗氧剂1010)和亚磷酸酯类(抗氧剂168)，两者质量比为1:6，美国雅宝。
热塑性聚合物：聚丙烯：K7926上海赛科；
聚酰胺66：101F美国杜邦；
聚酰胺6：M2500I新会美达；
聚乙烯：HDPE8008独山子；
聚苯硫醚：PPS-hb四川得阳化学；
炭黑：M717美国卡博特；
滑石粉：AH51210辽宁艾海；
硅酮粉：HMB-0221美国道康宁；
芥酸酰胺：芥酸酰胺南通弘道化工。
各性能指标的测试方法：
摩擦性能(干磨)：执行GB 3960，注塑成100mm*100mm*3mm光板进行测试；耐刮擦性能：按照大众主机厂PV3952的标准，注塑成150mm*100mm*3mm的STUCCO皮纹板，利用专用十字划格仪和色差仪，使用20N的力进行刮擦实验，然后用色差仪测试刮痕处的亮度变化△L值，△L值越小说明耐刮擦性能越好。
实施例A1-A11及对比例B1-B2：耐刮擦母粒的制备
按表1的配比将立方氮化硼放置于200～300℃高温下处理10-30分钟后，再与超高分子量聚乙烯、聚乙烯接枝马来酸酐、加工助剂放入密炼机中进行密炼40-60分钟，再将该密炼好的混合物加入到单螺杆直径55mm-65mm，长径比18-22：1，螺杆转速80RPM-120RPM的单螺杆挤出机中在150～200℃下进行造粒，得到耐刮擦母粒。
表1实施例A1-A11及对比例B1-B2的各组分配比(重量份)
[根据细则26改正10.04.2018]　
Figure WO-DOC-FIGURE-1
续表1
[根据细则26改正10.04.2018]　
实施例1-6及对比例1-10：热塑性复合材料的制备
按表2的配比将热塑性聚合物、炭黑和/或滑石粉、表1所示的耐刮擦母粒或硅酮粉或芥酸酰胺经高速混合机常温混合6min，混合速度为160转/min，将混合后的共混物通过双螺杆挤出机挤出造粒，挤出机的各区温度从喂料段到机头温度依次为200℃、220℃、220℃、220℃、220℃、215℃，螺杆长径比为40，螺杆直径为42mm，螺杆转速为450转/分钟，喂料速度为38转/分钟。将挤出好的粒子，进行单螺杆注塑机注塑成标准样件用于测试，单螺杆注塑温度从喂料到机头依次为220℃、230℃、230℃、235℃、235℃、230℃，注塑机螺杆长径比为30， 螺杆转速为150转/min，注塑压力为80MPa，螺杆背压为8MPa，注塑时间为10s，冷却时间为6s；所得热塑性复合材料的耐磨性和耐刮擦性测试结果如表2所示。
表2实施例1-6及对比例1-10的各组分配比(重量份)及性能结果
[根据细则26改正10.04.2018]　
Figure WO-DOC-FIGURE-2
从表2的实施例1-6及对比例1-10的比较可以看出：通过将特定数均分子量的超高分子量聚乙烯、特定粒径的立方氮化硼以及特定马来酸酐接枝率的聚乙烯接 枝马来酸酐进行复配制备得到耐刮擦母粒，将其加入到热塑性复合材料中，使得制备得到的热塑性复合材料的耐磨性和耐刮擦性得到明显提高。
续表2
[根据细则26改正10.04.2018]　
从表2的实施例1-6及对比例1-10的比较可以看出：通过将特定数均分子量的 超高分子量聚乙烯、特定粒径的立方氮化硼以及特定马来酸酐接枝率的聚乙烯接枝马来酸酐进行复配制备得到耐刮擦母粒，将其加入到热塑性复合材料中，使得制备得到的热塑性复合材料的耐磨性和耐刮擦性得到明显提高。

Claims (9)

  1. 一种耐刮擦母粒，按重量份数计，包括如下组分：
    Figure PCTCN2018074796-appb-100001
  2. 根据权利要求1所述的耐刮擦母粒，其特征在于，所述超高分子量聚乙烯的数均分子量为300万-800万。
  3. 根据权利要求1所述的耐刮擦母粒，其特征在于，所述立方氮化硼的粒径为1250目-2000目。
  4. 根据权利要求1所述的耐刮擦母粒，其特征在于，所述聚乙烯接枝马来酸酐中的聚乙烯为高密度聚乙烯，马来酸酐接枝率在1％-2％。
  5. 根据权利要求1所述的耐刮擦母粒，其特征在于，所述加工助剂选自二甲基硅油、抗氧剂、润滑剂中的一种或几种；所述抗氧剂为受阻酚类和亚磷酸酯类，两者比例为4:1-1:4。
  6. 一种如权利要求1-5任一项所述的耐刮擦母粒的制备方法，其特征在于，包括如下步骤：
    按照配比将立方氮化硼放置于200～300℃高温下处理10-30分钟后，再与超高分子量聚乙烯、聚乙烯接枝马来酸酐、加工助剂放入密炼机中进行密炼40-60分钟，再将该密炼好的混合物加入到单螺杆直径55mm-65mm，长径比18-22：1，螺杆转速80RPM-120RPM的单螺杆挤出机中在150～200℃下进行造粒，得到耐刮擦母粒。
  7. 如权利要求1-5任一项所述的耐刮擦母粒在热塑性复合材料中的应用。
  8. 一种热塑性复合材料，包含权利要求1-5任一项所述的耐刮擦母粒。
  9. 根据权利要求8所述的热塑性复合材料，其特征在于，所述耐刮擦母粒的添加量为整个热塑性复合材料总重量的0.3-3wt％。
PCT/CN2018/074796 2017-02-22 2018-01-31 一种耐刮擦母粒和其制备方法与应用以及由其组成的热塑性复合材料 WO2018153230A1 (zh)

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