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CN-122011583-A - High-performance polypropylene derivative for packaging material and preparation method thereof

CN122011583ACN 122011583 ACN122011583 ACN 122011583ACN-122011583-A

Abstract

The invention discloses a high-performance polypropylene derivative for a packaging material and a preparation method thereof, and relates to the technical field of plastics. The high-performance polypropylene derivative for the packaging material comprises a modified polypropylene base material, a cycloolefin copolymer, a nucleating agent and intercalated montmorillonite, wherein the modified polypropylene base material is prepared by melt blending polypropylene and polyamide-based siloxane, and the toughness and antistatic property are improved while the scratch property is ensured by melt blending polypropylene and a polymer with amide and siloxane. The intercalated montmorillonite is prepared by the reaction of acrylic ester polymer and montmorillonite, the acrylic ester polymer is prepared by the reaction of N-vinyl pyrrolidone and perfluoro epoxy methacrylate, the perfluoro epoxy methacrylate is hexafluoroepoxypropane prepared by the ring-opening oligomerization of hexafluoroepoxypropane, and the acyl fluoride functionalized hexafluoroepoxypropane is prepared by the esterification of the acyl fluoride functionalized hexafluoropropylene oxide with methacryloyl chloride after the hydrolysis, so that the toughness is improved, and meanwhile, the barrier property of the polypropylene derivative is enhanced.

Inventors

  • Ling Xingsen
  • CHI GUOFENG
  • CHI JUN

Assignees

  • 固耐安包装材料(云南)有限公司

Dates

Publication Date
20260512
Application Date
20260309

Claims (10)

  1. 1. The high-performance polypropylene derivative for the packaging material is characterized by comprising a modified polypropylene base material, an antioxidant and intercalated montmorillonite, wherein the modified polypropylene base material is prepared by melt blending polypropylene and polyamide-based siloxane, and the intercalated montmorillonite is prepared by reacting an acrylic ester polymer with montmorillonite.
  2. 2. The high performance polypropylene derivative according to claim 1, wherein the polyamidosiloxane is prepared by reacting polyethylene 2, 5-furandicarboxylate with isocyanate siloxane, and the isocyanate siloxane is prepared by reacting 4,4' -diphenylmethane diisocyanate with hydroxyl-terminated polydimethylsiloxane.
  3. 3. The high-performance polypropylene derivative for packaging materials according to claim 1, wherein the acrylic ester polymer is prepared by reacting N-vinyl pyrrolidone with perfluoro epoxy methacrylate, wherein the perfluoro epoxy methacrylate is prepared by performing ring opening oligomerization on hexafluoropropylene oxide to obtain acyl fluoride functionalized hexafluoropropylene oxide, and then performing hydrolysis and esterification with methacryloyl chloride.
  4. 4. The high performance polypropylene derivative for packaging material according to claim 1, wherein the antioxidant is antioxidant 1010.
  5. 5. The method for preparing a high-performance polypropylene derivative for packaging material according to claim 1, comprising the following specific steps: S1, mixing polyethylene 2, 5-furandicarboxylic acid glycol ester and N, N-dimethylformamide according to a mass ratio of 1:2-3 under nitrogen atmosphere, heating to 60-70 ℃, stirring and dissolving, cooling to 40-45 ℃, adding dibutyltin dilaurate which is a catalyst with the mass of 0.01-0.03 times that of the polyethylene 2, 5-furandicarboxylic acid glycol ester, stirring uniformly, adding isocyanate siloxane with the mass of 1.8-2.2 times that of the polyethylene 2, 5-furandicarboxylic acid glycol ester, heating to 50-55 ℃, stirring and reacting for 4-6 hours at 100-200 rpm, and cooling to room temperature to obtain polyamide-based siloxane; S2, mixing polypropylene and polyamide-based siloxane according to a mass ratio of 40-60:1, placing the mixture in a high-speed mixer, mixing the mixture for 8-10 min at 70-90 ℃ and 900-1200 rpm, transferring the mixture to a double-screw extruder, and carrying out melt extrusion granulation at 180-190 ℃ to obtain a modified polypropylene resin base material; S3, mixing acyl fluoride functionalized hexafluoropropylene oxide, methanol, diethyl ether, sodium carbonate and magnesium sulfate according to the mass ratio of 0.2-0.4:1-2:20-50:0.01:0.01, reacting for 14-16 hours at room temperature, adding sodium borohydride with the mass of 0.5-0.7 times of the acyl fluoride functionalized hexafluoropropylene oxide and methanol with the mass of 8-10 times of the acyl fluoride functionalized hexafluoropropylene oxide, refluxing for reacting for 14-16 hours, quenching with hydrochloric acid, washing with deionized water and saturated sodium chloride solution in sequence, cooling to 0-2 ℃, adding methacryloyl chloride, triethylamine and tetrahydrofuran, heating to room temperature, reacting for 8-12 hours, washing with deionized water and saturated sodium bicarbonate solution in sequence, drying with magnesium sulfate, and distilling under reduced pressure to obtain perfluoro epoxy methacrylate; S4, mixing an acrylic ester polymer and N, N-dimethylformamide according to a mass ratio of 6-7:1, stirring and dissolving, adding a catalyst dibutyltin dilaurate with an acrylic ester polymer mass of 0.001-0.003 times, stirring uniformly, adding pretreated montmorillonite with an acrylic ester polymer mass of 0.06-0.08 times, reacting for 20-30 min, heating to 70-80 ℃, continuing to react for 4-6 h, cooling to 50-60 ℃, and vacuum defoaming to obtain intercalated montmorillonite; S5, mixing the modified polypropylene base material, the antioxidant and the intercalated montmorillonite, placing the mixture in a high-speed mixer, mixing the mixture for 8-10 min at 70-90 ℃ and 900-1200 rpm, transferring the mixture to a double-screw extruder, and performing melt extrusion granulation at 180-190 ℃ to obtain the high-performance polypropylene derivative for the packaging material.
  6. 6. The method for preparing the high-performance polypropylene derivative for the packaging material according to claim 5, wherein in the step S1, the preparation method of the isocyanate siloxane is characterized in that hydroxyl-terminated polydimethylsiloxane and N, N-dimethylformamide are mixed according to the mass ratio of 5:3-4 in a nitrogen atmosphere, dibutyl tin dilaurate which is a catalyst with the mass of 0.001-0.003 times that of the hydroxyl-terminated polydimethylsiloxane is added after uniform stirring, and an N, N-dimethylformamide solution of 4,4' -diphenylmethane diisocyanate with the mass fraction of 30-60% is dropwise added at the rate of 1-3 ml/min, and the reaction is continued for 5-7 hours at the temperature of 35-40 ℃, and the mixture is cooled to room temperature, so that the isocyanate siloxane is prepared.
  7. 7. The method for preparing the high-performance polypropylene derivative for the packaging material according to claim 5, wherein in the step S3, the preparation method of the acyl fluoride functionalized hexafluoropropylene oxide is characterized in that cesium fluoride and tetraglyme are mixed according to the mass ratio of 0.1-0.12:3 under the nitrogen atmosphere, cooled to 0-2 ℃, hexafluoropropylene oxide with 40-50 times of the mass of cesium fluoride is dropwise added at the speed of 1-3 ml/min, the temperature is raised to 100-120 ℃, the reaction time is 6-12 h, the temperature is cooled to room temperature, and the pressure is reduced, so that the acyl fluoride functionalized hexafluoropropylene oxide is prepared.
  8. 8. The method for producing a high performance polypropylene derivative for packaging material according to claim 5, wherein in the step S3, the mass ratio of the acyl fluoride functionalized hexafluoropropylene oxide, the methacryloyl chloride, the triethylamine and the tetrahydrofuran is 1:2 to 4:3 to 5:40.
  9. 9. The method for preparing the high-performance polypropylene derivative for the packaging material according to claim 5, wherein in the step S4, the preparation method of the pretreated montmorillonite is characterized in that montmorillonite, diphenylmethane diisocyanate and toluene are mixed according to the mass ratio of 1:0.3-0.5:200 in a nitrogen atmosphere, the temperature is raised to 80-85 ℃, the reaction is carried out for 8-10 hours, suction filtration is carried out, the washing is carried out by toluene, and finally the pretreated montmorillonite is prepared by drying at 100-110 ℃.
  10. 10. The method for producing a high performance polypropylene derivative for packaging material according to claim 5, wherein in the step S5, the mass ratio of the modified polypropylene base material, the antioxidant and the intercalated montmorillonite is 50-60:0.2-0.3:10-20.

Description

High-performance polypropylene derivative for packaging material and preparation method thereof Technical Field The invention relates to the technical field of plastics, in particular to a high-performance polypropylene derivative for packaging materials and a preparation method thereof. Background Today, the parallel requirements of consumer upgrading and environmental protection are met, the traditional polypropylene packaging material is difficult to meet the requirements of high performance and high safety in the fields of food, medicine and the like. Therefore, high-performance polypropylene derivatives represented by metallocene polypropylene, high-crystalline polypropylene, high-melt-strength polypropylene, polyolefin elastomer and the like are generated, and the high-performance polypropylene derivatives realize the synergistic optimization of strength, toughness, barrier property, optical performance and processability through the molecular structure design and multi-component compounding, and become an important support for the packaging industry to be converted into high-end and functional types. The high-performance polypropylene derivative provides a material solution with excellent performance, exquisite appearance and environmental protection property for the packaging industry through continuous molecular structure innovation and composite modification, and also contributes to realizing resource conservation and environmental protection while improving the packaging value. Therefore, the invention researches and prepares the high-performance polypropylene derivative for the packaging material with high toughness and barrier property. Disclosure of Invention The invention aims to solve the technical problem of providing a high-performance polypropylene derivative for packaging materials and a preparation method thereof. The invention provides a technical scheme for solving the technical problems, which is that the high-performance polypropylene derivative for the packaging material comprises a modified polypropylene base material, an antioxidant and intercalated montmorillonite, wherein the modified polypropylene base material is prepared by melt blending polypropylene and polyamide-based siloxane, and the intercalated montmorillonite is prepared by reacting an acrylic ester polymer with montmorillonite. Preferably, the polyamidosiloxane is prepared by reacting polyethylene 2, 5-furandicarboxylate with isocyanate siloxane, and the isocyanate siloxane is prepared by reacting 4,4' -diphenylmethane diisocyanate with hydroxyl-terminated polydimethylsiloxane. Preferably, the acrylic ester polymer is prepared by reacting N-vinyl pyrrolidone with perfluoro epoxy methacrylate, wherein the perfluoro epoxy methacrylate is prepared by performing ring opening oligomerization on hexafluoropropylene oxide to prepare acyl fluoride functionalized hexafluoropropylene oxide, and then performing esterification with methacryloyl chloride after hydrolysis. Preferably, the antioxidant is antioxidant 1010. Preferably, the preparation method of the high-performance polypropylene derivative for the packaging material comprises the following specific steps: S1, mixing polyethylene 2, 5-furandicarboxylic acid glycol ester and N, N-dimethylformamide according to a mass ratio of 1:2-3 under nitrogen atmosphere, heating to 60-70 ℃, stirring and dissolving, cooling to 40-45 ℃, adding dibutyltin dilaurate which is a catalyst with the mass of 0.01-0.03 times that of the polyethylene 2, 5-furandicarboxylic acid glycol ester, stirring uniformly, adding isocyanate siloxane with the mass of 1.8-2.2 times that of the polyethylene 2, 5-furandicarboxylic acid glycol ester, heating to 50-55 ℃, stirring and reacting for 4-6 hours at 100-200 rpm, and cooling to room temperature to obtain polyamide-based siloxane; S2, mixing polypropylene and polyamide-based siloxane according to a mass ratio of 40-60:1, placing the mixture in a high-speed mixer, mixing the mixture for 8-10 min at 70-90 ℃ and 900-1200 rpm, transferring the mixture to a double-screw extruder, and carrying out melt extrusion granulation at 180-190 ℃ to obtain a modified polypropylene resin base material; S3, mixing acyl fluoride functionalized hexafluoropropylene oxide, methanol, diethyl ether, sodium carbonate and magnesium sulfate according to the mass ratio of 0.2-0.4:1-2:20-50:0.01:0.01, reacting for 14-16 hours at room temperature, adding sodium borohydride with the mass of 0.5-0.7 times of the acyl fluoride functionalized hexafluoropropylene oxide and methanol with the mass of 8-10 times of the acyl fluoride functionalized hexafluoropropylene oxide, refluxing for reacting for 14-16 hours, quenching with hydrochloric acid, washing with deionized water and saturated sodium chloride solution in sequence, cooling to 0-2 ℃, adding methacryloyl chloride, triethylamine and tetrahydrofuran, heating to room temperature, reacting for 8-12 hours, washing with deionized water