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A kind of grafted antibacterial polypropylene and its preparation process

An antibacterial polypropylene and polypropylene technology, applied in the field of antibacterial polypropylene, can solve the problems of short antibacterial cycle, poor antibacterial performance of polypropylene, etc., and achieve good antibacterial durability, excellent antibacterial performance, huge market application prospects and market value. Effect

Active Publication Date: 2021-06-08
汕头市远生实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a novel grafted antibacterial polypropylene and its preparation process to solve the problems of poor antibacterial performance and short antibacterial cycle of polypropylene in the existing production process.

Method used

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  • A kind of grafted antibacterial polypropylene and its preparation process
  • A kind of grafted antibacterial polypropylene and its preparation process
  • A kind of grafted antibacterial polypropylene and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Add 30g of allylbenzothiazole, 300mL of tetrahydrofuran, 12mL of liquid bromine and 0.2g of copper bromide into a 500mL three-necked flask, react at 80°C for 3 hours, and purify to obtain a light yellow solid.

[0027] (2) Add 10g of polypropylene and 100mL of dichloromethane into a 250mL three-neck flask, stir and reflux at 100°C for 3 hours. After the polypropylene was fully dissolved, 0.5 g of potassium persulfate and 12 g of maleic anhydride were added in a nitrogen atmosphere, the temperature was raised to 150° C., and the reaction was continued for 3 hours.

[0028] (3) After the temperature of the reaction liquid in (2) is cooled to 70°C, add 22g of light yellow solid, react at this temperature for 5 hours, precipitate, wash, dry and set aside.

Embodiment 2

[0030] (1) Add 32g of 5-chloro-2-methyl-4-isothiazolin-3-one, 350mL of dimethyl sulfoxide, 13mL of liquid bromine and 0.3g of copper bromide into a 500mL three-necked flask, and react at 70°C for 2 Hours, purified to a light yellow solid.

[0031] (2) Add 8g of polypropylene and 90mL of xylene into a 250mL three-necked flask, and stir and reflux at 110°C for 3 hours. After the polypropylene was fully dissolved, 0.3 g of benzoyl peroxide tert-butyl peroxide and 10 g of maleic anhydride were added in a nitrogen atmosphere, the temperature was raised to 180° C., and the reaction was continued for 4 hours.

[0032] (3) After the temperature of the reaction solution in (2) is cooled to 75°C, add 16g of light yellow solid, react at this temperature for 6 hours, precipitate, wash, dry and set aside.

Embodiment 3

[0034] (1) Add 28g of 2-octyl-4-isothiazolin-3-one, 280mL of dimethylformamide, 12mL of liquid bromine and 0.1g of copper bromide into a 500mL three-neck flask, react at 75°C for 3 hours, and purify A pale yellow solid was obtained.

[0035] (2) Add 10g of polypropylene and 120mL of pentane into a 250mL three-neck flask, stir and reflux at 120°C for 2 hours. After the polypropylene was fully dissolved, 0.6 g of dibenzoyl peroxide and 10 g of maleic anhydride were added in a nitrogen atmosphere, the temperature was raised to 160° C., and the reaction was continued for 3 hours.

[0036] (3) After the temperature of the reaction solution in (2) is cooled to 80°C, add 22g of a light yellow solid, react at this temperature for 4 hours, precipitate, wash, dry, and set aside.

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Abstract

The invention relates to a novel grafted antibacterial polypropylene, which is mainly obtained by grafting polypropylene and maleic anhydride to obtain an intermediate, which is then prepared by nucleophilic reaction with a brominated organic antibacterial agent; wherein the organic antibacterial agent molecule contains a or multiple -N-S bonds, one or more C=C bonds, one or more ring structures. The novel grafted antibacterial polypropylene of the present invention can be used alone as an antibacterial PP material, or can be blended with polypropylene as an antibacterial additive masterbatch, or multi-layer co-extruded with PP to greatly improve the antibacterial performance of the PP surface. The new grafted antibacterial polypropylene of the present invention has good adhesion to substrate PP, good antibacterial performance durability, excellent mechanical properties, and good high temperature stability. Due to the small amount of addition, it does not affect the mechanical properties of the base material, which solves the problem of the existing production process. There are problems such as poor antibacterial performance of PP products, easy precipitation and loss of antibacterial agents, and short antibacterial cycle. Moreover, the preparation process is simple, the cost is low, and the method has huge market application prospects and market value.

Description

technical field [0001] The invention relates to the field of antibacterial polypropylene, in particular to a novel graft antibacterial polypropylene and its preparation and application. Background technique [0002] Polypropylene (PP) is odorless, non-toxic, feels like wax, and has excellent low temperature resistance. Good chemical stability, resistant to most acids and alkalis (not resistant to acids with oxidizing properties). It is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation, and is widely used in the manufacture of films, hollow products, fibers and daily sundries. However, its products have no antibacterial properties, and the surface is prone to breed bacteria, causing diseases to the human body. Therefore, the development of antibacterial PP materials has great practical application significance. [0003] Antibacterial agents can be divided into three categories according to their composition, namel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F222/06C08F8/34C08L23/12C08L51/06
CPCC08F8/34C08F255/02C08L23/12C08F222/06C08L51/06
Inventor 周杭远陈汉佳屈杰光尹小林
Owner 汕头市远生实业有限公司
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