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CN-120484485-B - Corrosion-resistant and ageing-resistant plastic packaging barrel and preparation method thereof

CN120484485BCN 120484485 BCN120484485 BCN 120484485BCN-120484485-B

Abstract

The invention discloses a corrosion-resistant and ageing-resistant plastic packaging barrel and a preparation method thereof, which belong to the technical field of plastic product processing and are used for solving the technical problem that the corrosion resistance and ageing resistance of the plastic packaging barrel in the prior art are to be further improved, and specifically comprise the following raw materials in parts by weight: 60-70 parts of modified silicone resin, 3-5 parts of modified aging-resistant filler, 8-12 parts of polypropylene, 12-18 parts of maleic anhydride grafted polypropylene and 3-5 parts of auxiliary additive, the invention adds polypropylene, maleic anhydride grafted polypropylene, modified silicone resin, modified aging-resistant filler and auxiliary additive into a double-screw melt extruder, and then carries out melt extrusion and injection into a die to obtain the plastic packaging barrel, thereby improving the corrosion resistance and ageing resistance and the mechanical property of the plastic packaging barrel.

Inventors

  • LI JIANCHUN

Assignees

  • 江苏瑞宏塑业有限公司

Dates

Publication Date
20260508
Application Date
20250523

Claims (5)

  1. 1. A corrosion-resistant and ageing-resistant plastic packaging barrel is characterized by comprising, by weight, 60-70 parts of modified silicone resin, 3-5 parts of modified ageing-resistant filler, 8-12 parts of polypropylene, 12-18 parts of maleic anhydride grafted polypropylene and 3-5 parts of auxiliary additives; The auxiliary additive consists of an initiator, a plasticizer and an antistatic agent according to the mass ratio of 1:5:1; The modified silicone resin is prepared by the following steps: A1, placing 1,3, 5-trimethyl-1, 3, 5-tris (3, 3-trifluoropropyl) cyclotrisiloxane, tetramethyl tetravinyl cyclotrisiloxane and xylene in a reaction kettle, heating to 110-120 ℃, adding a catalyst, carrying out heat preservation reaction for 4-6 hours, adding 1, 3-bis (3-hydroxyisobutyl) tetramethyl disiloxane, carrying out heat preservation reaction for 3-5 hours, and carrying out aftertreatment to obtain a modified silicone resin precursor; A2, placing the modified silicone resin precursor, polyethylene glycol, stannous octoate and tetrahydrofuran in a reaction kettle provided with a condensing device under the nitrogen atmosphere, stirring for 5-15min, placing a condensing tube, heating to 60-65 ℃, adding calculated amount of hexamethylene diisocyanate into the reaction kettle, carrying out heat preservation reaction for 0.5-1h, adding trimethylolpropane and flame-retardant microspheres, carrying out heat preservation reaction for 1-2h, and carrying out post treatment to obtain the modified silicone resin; the preparation method of the flame-retardant microsphere comprises the steps of placing deionized water, ethanol, ammonium polyphosphate, OP-10 and ammonia water in a reaction kettle, stirring for 5-10min, adding tetraethoxysilane and (2-amino isopropyl) triethoxysilane, heating to 35-45 ℃, carrying out heat preservation reaction for 1-2h, and carrying out post-treatment to obtain the flame-retardant microsphere; the modified anti-aging filler is prepared by the following steps: b1, placing carboxylated carbon nanotubes and ethanol in a reaction kettle, performing ultrasonic dispersion for 1-5min, adding a nitric acid solution to adjust pH=3-4, heating to 55-65 ℃, performing heat preservation reaction for 5-6h, and performing post-treatment to obtain activated carbon nanotubes; And B2, placing 2, 4-trimethyl-1, 2-dihydroquinoline and 3-glycidoxypropyl triethoxysilane in a reaction kettle, heating to 130-140 ℃, condensing and refluxing for 3-4 hours, cooling to 55-65 ℃, adding ethanol, gamma-methacryloxypropyl trimethoxysilane and activated carbon nano tubes, heating to 75-85 ℃, condensing and refluxing for 5-6 hours, and performing post treatment to obtain the modified aging-resistant filler.
  2. 2. The plastic packaging barrel with corrosion resistance and ageing resistance as claimed in claim 1, wherein in the step A1, the dosage ratio of 1,3, 5-trimethyl-1, 3, 5-tris (3, 3-trifluoropropyl) cyclotrisiloxane, tetramethyl tetravinyl cyclotrisiloxane, xylene, catalyst and 1, 3-bis (3-hydroxyisobutyl) tetramethyl disiloxane is 2-3g:7-9g:100-150mL:4-6mL:0.5-1g, the catalyst is a 20wt% sulfuric acid solution, the dosage ratio of the modified silicone resin precursor, polyethylene glycol, stannous octoate, tetrahydrofuran, trimethylol propane and flame retardant microspheres in the step A2 is 10-12g:2-4g:0.5-1g:250-300mL:2-4g, and in the reaction, hexamethylene diisocyanate is 0.55 times the molar amount of hydroxyl groups in the reaction system.
  3. 3. The plastic packaging barrel with corrosion resistance and ageing resistance according to claim 1, wherein the dosage ratio of deionized water, ethanol, ammonium polyphosphate, OP-10, ammonia water, tetraethoxysilane and (2-amino isopropyl) triethoxysilane is 8-10mL:20-25mL:5-6g:1-2g:15-20mL:10-12g:5-8g, and the concentration of the ammonia water is 25-30wt%.
  4. 4. The plastic packaging barrel with corrosion resistance and ageing resistance according to claim 1, wherein in the step B1, the dosage ratio of the carboxylated carbon nano tube to the ethanol is 1-2g:200-300mL, the concentration of the nitric acid solution is 95-98wt%, and in the step B2, the dosage ratio of the 2, 4-trimethyl-1, 2-dihydroquinoline, 3-glycidoxypropyl triethoxysilane, ethanol, deionized water, gamma-methacryloxypropyl trimethoxysilane and the activated carbon nano tube is 4-5g:5-6g:250-300mL:15-20mL:1-2g:2-3g.
  5. 5. A process for preparing the anti-corrosion and anti-ageing plastic packing barrel as claimed in any one of claims 1-4, which comprises the steps of adding polypropylene, maleic anhydride grafted polypropylene, modified silicone resin, modified anti-ageing filler and auxiliary additives into a double-screw melt extruder, performing melt extrusion, and injecting into a die to obtain the plastic packing barrel.

Description

Corrosion-resistant and ageing-resistant plastic packaging barrel and preparation method thereof Technical Field The invention relates to the technical field of plastic product processing, in particular to a corrosion-resistant and ageing-resistant plastic packaging barrel and a preparation method thereof. Background In recent years, with the rapid development of chemical industry, food and logistics industry, plastic packaging barrels are gradually replaced by traditional metal containers due to the advantages of light weight, convenient molding and cost, and become a main stream choice for transporting and storing liquid or solid materials, however, the conventional plastic packaging barrels have obvious short plates in the aspects of flame resistance, corrosion resistance and ageing resistance, in long-term outdoor use, the plastic packaging barrels are easy to cause barrel swelling and cracking and even cause leakage risks due to long-term contact of corrosive substances such as chemical raw materials, acid-base solution and the like, and polymer chain breakage in the plastic packaging barrels is accelerated under the long-term action of ultraviolet radiation, the surface pulverization and the mechanical property dip are shown, the service life of the packaging barrels is obviously shortened, although the performance is attempted to be improved by adding means such as an antioxidant, an ultraviolet absorber or a surface coating, the problems of additive precipitation, coating falling or rapid weather resistance attenuation exist, and the like, and the severe requirements of high-end application scenes on long-term stability are difficult to meet. In the prior art, the sources of insufficient flame retardance, corrosion resistance and ageing resistance of the plastic packaging barrel are mainly from the limitations of material molecular structure and interface design, the carbon-carbon main chain of the polyolefin material is easy to cause free radical chain reaction under the action of thermal oxygen and photooxygen, so that chain breakage and cross-linking unbalance are caused, polar corrosive media can destroy the regularity of the molecular chain through diffusion permeation, the degradation of the material is aggravated, the corrosion resistance and the flame retardance of the plastic packaging barrel are improved, the performance is often improved by adding inorganic filler or flame retardant, but the compatibility of the added reinforcing material and a polymer matrix is poor, stress concentration points are easy to form, microcrack expansion is induced under the action of long-term stress corrosion or thermal cycle, in addition, the traditional modification technology is mostly dependent on physical blending, the functional components are easy to migrate to the surface to run off, and the service life is shortened. Disclosure of Invention The invention aims to provide a corrosion-resistant and ageing-resistant plastic packaging barrel and a preparation method thereof, which are used for solving the technical problems that the corrosion resistance and ageing resistance of the plastic packaging barrel in the prior art are required to be further improved. The invention aims at realizing the technical scheme that the plastic packaging barrel with corrosion resistance and ageing resistance comprises the following raw materials, by weight, 60-70 parts of modified silicone resin, 3-5 parts of modified ageing-resistant filler, 8-12 parts of polypropylene, 12-18 parts of maleic anhydride grafted polypropylene and 3-5 parts of auxiliary additive; the auxiliary additive consists of an initiator, a plasticizer, an antistatic agent and an antibacterial agent according to the mass ratio of 1:5:1:0.5. Further, the modified silicone resin is prepared by the following steps: A1, placing 1,3, 5-trimethyl-1, 3, 5-tris (3, 3-trifluoropropyl) cyclotrisiloxane, tetramethyl tetravinyl cyclotrisiloxane and xylene in a reaction kettle, heating to 110-120 ℃, adding a catalyst, carrying out heat preservation reaction for 4-6 hours, adding 1, 3-bis (3-hydroxyisobutyl) tetramethyl disiloxane, carrying out heat preservation reaction for 3-5 hours, and carrying out aftertreatment to obtain a modified silicone resin precursor; the preparation reaction principle of the modified silicone resin precursor is as follows: In the reaction process, under the catalysis of a sulfuric acid solution with the concentration of 50 weight percent, 1,3, 5-trimethyl-1, 3, 5-tri (3, 3-trifluoropropyl) cyclotrisiloxane and tetramethyl tetravinyl cyclotrisiloxane are hydrolyzed into silanol, the silanol undergoes further condensation reaction to obtain long-chain polysiloxane, and 1, 3-bis (3-hydroxy isobutyl) tetramethyl disiloxane is added as a blocking agent to obtain a modified silicone resin precursor with a side chain containing olefin unsaturated double bonds and hydroxyl blocked. A2, placing the modified silicone resin precursor, polyethyle