WO2018153229A1 - Composition de polypropylène résistant à un choc à basse température - Google Patents

Composition de polypropylène résistant à un choc à basse température Download PDF

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Publication number
WO2018153229A1
WO2018153229A1 PCT/CN2018/074782 CN2018074782W WO2018153229A1 WO 2018153229 A1 WO2018153229 A1 WO 2018153229A1 CN 2018074782 W CN2018074782 W CN 2018074782W WO 2018153229 A1 WO2018153229 A1 WO 2018153229A1
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WO
WIPO (PCT)
Prior art keywords
polypropylene composition
temperature impact
low temperature
impact resistant
composition according
Prior art date
Application number
PCT/CN2018/074782
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English (en)
Chinese (zh)
Inventor
雷亮
周英辉
苏娟霞
孙刚
谢正瑞
吴国峰
杨波
罗忠富
Original Assignee
金发科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 金发科技股份有限公司 filed Critical 金发科技股份有限公司
Publication of WO2018153229A1 publication Critical patent/WO2018153229A1/fr

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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
    • 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
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Definitions

  • This invention relates to the modification of polypropylene, and more particularly to a low temperature impact resistant polypropylene composition.
  • Polypropylene is the most widely used variety of plastics for automobiles. It has the characteristics of low density, good performance and easy processing. It has become the most widely used type of plastic for vehicles. However, polypropylene has poor resistance to low temperature impact, and when the car is cold, the polypropylene plastic will deform, affecting driving safety and the appearance of the car. In order to improve the low temperature toughness of polypropylene, an elastomer is often added for toughening. Publication No.
  • CN 103665570A uses PP diisopropyl benzene to crosslink with a polyolefin elastomer to obtain XPOE as a toughening agent
  • CN103087429 B uses a hexene and octene-branched multi-branched polyethylene as a crack propagation inhibitor to enhance
  • the low temperature impact resistance of the polypropylene material however, the polypropylene composition disclosed in the above patent has the defects of insufficient impact resistance, especially the improvement of the impact resistance under the condition of low temperature is not obvious, far less than the low temperature of the automobile. The need for safe driving under conditions. Therefore, how to develop a low temperature impact resistant polypropylene composition has become an urgent problem to be solved in today's society.
  • the technical problem to be solved by the present invention is to provide a low temperature impact resistant polypropylene composition, wherein the sample prepared by the low temperature impact resistant polypropylene composition has a notched impact strength of the simply supported beam after being placed at -30 ° C for 4 hours. 5.0KJ/m 2 .
  • a low temperature impact resistant polypropylene composition comprising, by weight, the following components:
  • the weight ratio of styrene, ethylene and butadiene in the monomer unit of the hydrogenated styrene-butadiene block copolymer SEBS ranges from 18 to 35:40 to 60:5 to 42.
  • the weight ratio of styrene, ethylene and butadiene in the monomer unit of the hydrogenated styrene-butadiene block copolymer SEBS ranges from 21 to 28:45 to 55:17 to 34.
  • the polyolefin elastomer POE of the present invention may be selected from the usual ethylene-octene copolymers, ethylene-butene copolymers or ethylene-propylene polymers.
  • the polyolefin elastomer POE of the present invention has a glass transition temperature of from -52 ° C to -50 ° C.
  • the melt mass flow rate of the POE in the present invention is in the range of ISO 1133, 0.3 to 2 g/10 min at 190 ° C, 2.16 Kg, and the particle size range of the POE having a melt mass flow rate within the range It is 0.3 ⁇ 1.0um, the particle size is suitable, and it can be uniformly dispersed in the polypropylene composition, which is beneficial to the improvement of the low temperature impact resistance of the polypropylene composition, the mass flow rate is >2g/10min, and the particle size is small, and when When the melt mass flow rate is ⁇ 0.3 g/10 min, the particle size is too large.
  • the POE density in the present invention is 0.85 to 0.87 g/cm 3 in accordance with ISO 180.
  • the polypropylene resin in the invention is a copolymerized polypropylene resin, and the melt mass flow rate of the copolymerized polypropylene resin is ISO 1133 standard, and the melt mass flow rate is 1-100 g/10 min under 230 ° C, 2.16 Kg load. .
  • the low temperature impact resistant polypropylene composition of the present invention further comprises 10-25 parts by weight of the filler, and the filler is selected from one or more of talc, calcium carbonate, wollastonite, whiskers or glass fibers. mixture.
  • the low temperature impact resistant polypropylene composition of the present invention further comprises, by weight, 0.5 to 2 parts of a pigment, which is carbon black.
  • the low temperature impact resistant polypropylene composition of the present invention further comprises 0.5-2 parts of an auxiliary agent selected from the group consisting of one or more of an antioxidant, a light stabilizer or a lubricant.
  • an auxiliary agent selected from the group consisting of one or more of an antioxidant, a light stabilizer or a lubricant.
  • the antioxidant is a mixture of hindered phenols and phosphite antioxidants
  • the light stabilizer is a hindered amine light stabilizer
  • the lubricant is selected from the group consisting of silicones, amides, and polyethylenes.
  • the low temperature impact polypropylene composition of the present invention is prepared by uniformly mixing a polypropylene resin, a toughening agent, a filler, a pigment, an antioxidant, a light stabilizer and a lubricant into a twin-screw extruder.
  • the melt-kneading is carried out, the melt-kneading temperature is 170-220 ° C, the screw rotation speed is 350-450 rpm, and extrusion granulation is carried out to obtain the low-temperature impact-resistant polypropylene composition required by the present invention, which is injection molded.
  • ISO standard injection molded splint for testing the notched impact strength and flexural modulus of its simply supported beams.
  • the present invention has the following advantages:
  • the present inventors have found that hydrogenated styrene-butadiene block copolymer SEBS is distributed in polyolefin elastomer by using a specific weight content of hydrogenated styrene-butadiene block copolymer SEBS and polyolefin elastomer POE as a toughening agent.
  • the surface of the POE forms an interfacial layer, which increases the compatibility of the polyolefin elastomer POE with polypropylene, facilitates the dispersion and refinement of the polyolefin elastomer POE in the polypropylene matrix, and enhances the impact resistance of the polypropylene composition.
  • the low temperature impact resistance the sample prepared by using the low temperature impact resistant polypropylene composition of the present invention has a notched impact strength of more than 5.0 KJ/m 2 after being placed at -30 ° C for 4 hours, which can still be maintained. Good rigidity.
  • Polypropylene resin copolymerized polypropylene resin, PP BX3800, produced by SK Corporation of Korea, melt mass flow rate according to ISO 1133 standard, at 190 ° C, 2.16Kg load is 28.4g/10min;
  • Polyolefin elastomer POE having a melt mass flow rate of 1 g/10 min and a density of 0.87 g/cm 3 :
  • Ethylene-octene copolymer produced by Dow Corporation
  • Antioxidant hindered phenolic antioxidant 1010, phosphite antioxidant 168, produced by BASF;
  • the polypropylene resin, toughening agent, filler, pigment, antioxidant, light stabilizer and lubricant are uniformly mixed and then added to the twin-screw extruder for melt-kneading.
  • the melt-kneading temperature is 170- 220 ° C, screw rotation speed of 350 ⁇ 450 rev / min, extrusion granulation, you can get the low temperature impact resistant polypropylene composition required by the invention, injection molding into ISO standard injection molding spline, used to test its simple support Beam notched impact strength and flexural modulus.
  • Notched beam impact strength According to ISO180 "Plastic pendulum impact test method", the polypropylene composition samples were placed at a temperature of 23 ° C and -30 ° C for 4 h after testing;
  • Glass transition temperature Tg of polyolefin elastomer POE measured by differential scanning calorimeter (DSC), weighed 5 to 10 g of polypropylene composition sample, temperature range -100 ° C ⁇ 50 ° C, heating rate 5 ° C / min.
  • the notched impact strength of the simply supported beam is greater than that at -30 °C. 5.0KJ / m 2, the impact resistance, especially low-temperature impact performance is significantly improved, while also maintaining its excellent rigidity, Comparative toughener hydrogenated styrene - butadiene block copolymer SEBS and polyolefins
  • the weight content of the elastomer POE is not within the above weight content, and the prepared polypropylene composition has poor impact resistance.
  • the notched impact strength of the simply supported beam at -30 ° C is less than 4.2 KJ/m 2 , which cannot reach the poly A standard for the use of propylene compositions in cold weather.

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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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une composition de polypropylène résistant à un choc à basse température. La composition de polypropylène comprend les constituants suivants, en parties en poids : 40 à 75 parties d'une résine de polypropylène, 5 à 20 parties d'un copolymère à blocs styrène butadiène hydrogénés SEBS, et 5 à 25 parties d'un élastomère de polyoléfine (POE). Dans la composition de polypropylène résistant à un choc à basse température selon la présente invention, le copolymère à blocs styrène-butadiène hydrogénés SEBS et l'élastomère de polyoléfine (POE) sont utilisés selon des teneurs précises en poids en tant que plastificateurs, ce qui améliore l'efficacité de la composition de polypropylène en ce qui concerne la résistance à un choc et en particulier à un choc à basse température, la résistance au choc sur barreau entaillé d'une poutre simplement portée d'une éprouvette fabriquée par utilisation de la composition de polypropylène résistant à un choc à basse température étant supérieure à 5,0 KJ/m2 après mise en place de l'éprouvette pendant 4 h à -30 °C, tout en maintenant une bonne rigidité.
PCT/CN2018/074782 2017-02-24 2018-01-31 Composition de polypropylène résistant à un choc à basse température WO2018153229A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710101689.0A CN107841050A (zh) 2017-02-24 2017-02-24 一种耐低温冲击聚丙烯组合物
CN201710101689.0 2017-02-24

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WO2018153229A1 true WO2018153229A1 (fr) 2018-08-30

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Cited By (1)

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CN109762256A (zh) * 2018-12-13 2019-05-17 中广核俊尔新材料有限公司 一种柔性触感聚丙烯材料及其制备方法和应用

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CN110964257B (zh) * 2018-09-28 2022-07-12 中国石油化工股份有限公司 一种耐超低温冲击聚丙烯组合物及其制备方法
CN109486026A (zh) * 2018-10-29 2019-03-19 江苏金发科技新材料有限公司 提高表面火焰处理效果的聚丙烯组合物及其制备方法
CN111909531B (zh) * 2019-05-09 2022-05-20 中国石油化工股份有限公司 聚烯烃组合物和托盘及其制备方法
CN110452468B (zh) * 2019-09-25 2022-07-22 江苏中天科技股份有限公司 一种热塑性电缆绝缘料及其制备方法
CN111019242B (zh) * 2019-12-23 2022-10-21 广东金发科技有限公司 一种抗冲击、耐热、阻燃mpp电力管料及其制备方法
CN112409682A (zh) * 2020-10-09 2021-02-26 扬州龙彩塑料色母粒有限公司 一种增韧聚丙烯色母粒及其制备方法
CN112521692A (zh) * 2020-12-03 2021-03-19 江苏金发科技新材料有限公司 一种液晶高分子材料增强聚丙烯组合物及其制备方法
CN114058118A (zh) * 2021-11-06 2022-02-18 苏州市沈氏包装有限公司 一种耐低温食品桶及其制备方法
CN114773732B (zh) * 2022-02-08 2023-09-08 国高材高分子材料产业创新中心有限公司 一种用于缺口冲击强度检测的标准样品及其制备方法
CN115340723A (zh) * 2022-06-27 2022-11-15 江阴市鑫宝铁塑制品有限公司 一种具有耐低温高韧性的注塑包装桶及其制备方法
CN115403864B (zh) * 2022-09-30 2023-06-27 广州敬信高聚物科技有限公司 一种耐温pp料及其在制备汽车高频线中的应用

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109762256A (zh) * 2018-12-13 2019-05-17 中广核俊尔新材料有限公司 一种柔性触感聚丙烯材料及其制备方法和应用

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