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CN-122011574-A - Polypropylene material capable of being used at low temperature and preventing puncture, and preparation method and application thereof

CN122011574ACN 122011574 ACN122011574 ACN 122011574ACN-122011574-A

Abstract

The present invention belongs to the field of polymer material technology and provides a polypropylene material that can be used at low temperatures and is puncture resistant, as well as its preparation method and application. The present invention adopts homopolymer polypropylene, core-shell structure toughening elastomer, hydroxyl terminated polyisoprene, nanofiller, and crosslinking agent as the main raw material components of polypropylene material. The core-shell structure toughening elastomer includes polysiloxane acrylic ester core-shell elastomer and polycaprolactone styrene acrylonitrile core-shell elastomer. The polypropylene material provided by the present invention not only has excellent mechanical properties, but also can be used normally in extreme low temperature environments of ≤ -30 ℃, expanding the application scenarios of polypropylene material in extreme low temperature environments.

Inventors

  • HOU JINGHUA

Assignees

  • 中山市点石塑胶有限公司

Dates

Publication Date
20260512
Application Date
20260106

Claims (10)

  1. 1. The polypropylene material is characterized by comprising the following raw material components: Homo-polypropylene, A core-shell structure toughened elastomer, Hydroxyl terminated polyisoprene, Nano filler, A cross-linking agent; The core-shell structure toughening elastomer comprises a polysiloxane-acrylate core-shell elastomer and a polycaprolactone-styrene-acrylonitrile core-shell elastomer.
  2. 2. The polypropylene material according to claim 1, wherein the core-shell structure toughening elastomer comprises a polysiloxane-acrylate core-shell elastomer and a polycaprolactone-styrene-acrylonitrile core-shell elastomer in a mass ratio of 1-3:1.
  3. 3. The polypropylene material according to claim 1, wherein the nanofiller comprises modified nano calcium carbonate and/or modified nano silica.
  4. 4. The polypropylene material according to claim 1, wherein the cross-linking agent comprises dicumyl peroxide and/or trimethylol propane trimethacrylate.
  5. 5. The polypropylene material according to claim 1, wherein the raw material components of the polypropylene material further comprise auxiliary modifiers comprising compatibilizers and/or antioxidants.
  6. 6. The polypropylene material of claim 5, wherein the compatibilizing agent comprises at least one of an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, and a maleic anhydride grafted polypropylene.
  7. 7. The polypropylene material according to claim 1, wherein the polypropylene material comprises the following raw material components in parts by weight: 100 parts of homo-polypropylene, 15-25 Parts of core-shell structure toughened elastomer, 1-5 Parts of hydroxyl-terminated polyisoprene, 5-10 Parts of nano filler, 0.1-0.5 Part of cross-linking agent.
  8. 8. The method for producing a polypropylene material according to any one of claims 1 to 7, comprising the steps of: (1) Mixing the homopolymerized polypropylene and the core-shell structure toughened elastomer to obtain a first premix; (2) Mixing the nanofiller and the hydroxyl terminated polyisoprene to obtain a second premix; (3) And mixing the first premix and the second premix, adding a cross-linking agent, carrying out melt extrusion, granulating, and carrying out injection molding to obtain the polypropylene material.
  9. 9. The method according to claim 8, wherein in the step (2), the nanofiller and the hydroxyl terminated polyisoprene are mixed for 5 to 15 minutes at 50 to 70 ℃ and then heated to 90 to 110 ℃ and mixed for 10 to 20 minutes to obtain a second premix.
  10. 10. Use of the polypropylene material according to any one of claims 1to 7 for the preparation of low temperature protective materials, packaging materials, construction materials, automotive parts.

Description

Polypropylene material capable of being used at low temperature and preventing puncture, and preparation method and application thereof Technical Field The invention relates to the technical field of polymer materials, in particular to a low-temperature-use puncture-resistant polypropylene material, and a preparation method and application thereof. Background Polypropylene (PP) materials are widely applied to the fields of automobile parts, packaging, construction and protective equipment because of the advantages of light weight, chemical corrosion resistance and low cost. However, conventional PP is vulnerable to embrittlement at extremely low temperatures (e.g., less than or equal to-30 ℃), has significantly reduced impact resistance, and is difficult to resist penetration by sharp objects, limiting its application in extremely cold areas (e.g., automotive dashboards, and special protective equipment such as stab-resistant clothing, industrial protective equipment, etc.). At present, polypropylene materials with low-temperature toughness and puncture resistance are lacking in the market, and the rigidity or processability of the materials are often sacrificed by the existing modification technology (such as adding rubber, inorganic filler and the like). Accordingly, there is a need to develop a polypropylene material that can still be used at extremely low temperatures (e.g.,. Ltoreq.30℃), maintains high puncture resistance, and high toughness. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides a low-temperature usable puncture-resistant polypropylene material, and a preparation method and application thereof. The polypropylene material provided by the invention can be used under extremely low temperature (for example, less than or equal to minus 30 ℃) condition, can keep high puncture resistance and high toughness (for example, the notch impact strength of a cantilever beam can reach 5.8-7kJ/m 2 under minus 30 ℃) condition, and the puncture resistance can reach 98-115N. In a first aspect the present invention provides a low temperature usable, puncture resistant polypropylene material. In particular to a polypropylene material capable of being used at low temperature and preventing puncture, which comprises the following raw material components: Homo-polypropylene, A core-shell structure toughened elastomer, Hydroxyl terminated polyisoprene, Nano filler, A cross-linking agent; The core-shell structure toughening elastomer comprises a polysiloxane-acrylate core-shell elastomer and a polycaprolactone-styrene-acrylonitrile core-shell elastomer. The invention takes homopolymerized polypropylene as matrix resin, takes two different polysiloxane-acrylate core-shell elastomers and Polycaprolactone (PCL) -styrene-acrylonitrile (SAN) core-shell elastomers as toughening agents, simultaneously adds hydroxyl-terminated polyisoprene, has excellent elastic deformation capability at extremely low temperature, can play a synergistic effect with the two elastomers, builds a compact flexible toughening network, inhibits low-temperature brittle fracture, improves the puncture resistance of polypropylene materials, can improve the compatibility with other components by hydroxyl groups, takes nano filler as a rigid supporting framework, prevents crack initiation and expansion, and contributes to improving the puncture resistance, thus realizing the synergistic promotion of low-temperature puncture resistance and toughness, and expanding the application scene of the polypropylene materials at extremely low temperature. Preferably, the core-shell structure toughening elastomer comprises a polysiloxane-acrylate core-shell elastomer and a polycaprolactone-styrene-acrylonitrile core-shell elastomer in a mass ratio of 1-3:1. Further preferably, the core-shell structure toughening elastomer comprises a polysiloxane-acrylate core-shell elastomer and a polycaprolactone-styrene-acrylonitrile core-shell elastomer in a mass ratio of 1-2:1. Preferably, the polysiloxane-acrylate core-shell elastomer is prepared by a preparation method comprising the following steps: (1) Mixing water, an anionic emulsifier, octamethyl cyclotetrasiloxane and a silane coupling agent for reaction to obtain seed emulsion; (2) Mixing water, an anionic emulsifier, octamethyl cyclotetrasiloxane, a silane coupling agent and hexamethyldisiloxane, and then adding the mixture into the seed emulsion to react to obtain polysiloxane core emulsion; (3) Adjusting the pH value of the polysiloxane core emulsion to be alkaline, introducing protective gas, adding an acrylic ester monomer, a cross-linking agent and a regulator, swelling, adding an initiator, reacting for 2-3h, demulsifying, centrifuging and drying to obtain the polysiloxane-acrylic ester core-shell elastomer. Preferably, the anionic emulsifier is dodecylbenzene sulfonic acid (DBSA) and/or Sodium