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A kind of antibacterial polypropylene foam plastics and preparation method thereof

A technology of antibacterial polypropylene and foam plastics, applied in the field of antibacterial plastics, can solve the problems of easy precipitation, poor heat resistance of antibacterial plastic products, easy discoloration of antibacterial plastic products and cost

Active Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the inorganic antibacterial agents with better antibacterial effects are silver-based antibacterial agents, which have the advantage of high heat resistance. However, due to the high cost of silver-based antibacterial agents, the dosage is relatively large, and they are easy to change color. Disadvantages of easy discoloration and high cost; organic antibacterial agents have higher sterilization efficiency and less addition, but antibacterial plastic products prepared with them have disadvantages such as poor heat resistance, easy precipitation, and low safety

Method used

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  • A kind of antibacterial polypropylene foam plastics and preparation method thereof

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preparation example Construction

[0049] One, the preparation of compound antibacterial agent

[0050] 1. Composite antibacterial agent 1: polyhexamethylene guanidine propionate / polyzinc silicate composite antibacterial agent

[0051] (1) Weigh 100.0 g (0.465 mol) of polyhexamethylene guanidine propionate (Shanghai Gaoju F3000), add it to 300 mL deionized water solution, stir to dissolve it, and call it solution A; (2) also call it Add 70.0g (0.246mol) of sodium silicate (chemically pure) into 300mL of deionized water, stir to dissolve, and call it solution B; (3) mix solution A and solution B at room temperature (about 25°C) , and fully stirred for 30 minutes to form solution C; (4) Weigh zinc sulfate ZnSO 4 (Chemically pure) 180.0g (0.626mol), slowly poured into solution C, and vigorously stirred for 5min, the precipitate was filtered, dried, and pulverized to obtain polyhexamethylene guanidine propionate / polysilicate zinc composite antibacterial agent; wherein the molar ratio of polyhexamethylene guanidin...

Embodiment 1～13

[0057] Put matrix resin (polypropylene blended resin material, or high melt strength polypropylene), compound antibacterial agent, AC foaming agent, antioxidant 1010, antioxidant 168, silicon dioxide, white oil into a high-speed mixer , stir at high speed until evenly mixed, and discharge after 1 to 3 minutes. Use a double-roller masticator to masticate the mixed materials. The mastication temperature is 175°C to 185°C. Thin pass for 5 to 10 minutes, and then the sheet is released. Then use a molding foaming machine to mold and foam to form a 3mm thick sheet. The foaming temperature is 230°C, cut into the required sample size, and carry out the antibacterial performance test.

[0058] The above materials are all based on 100 parts by weight of polypropylene matrix resin, antioxidant 1010 and antioxidant 168 are compounded, and the weight ratio is 1:1. The specific formulations of other components are shown in Table 1. The antibacterial performance test results before and afte...

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Abstract

The invention provides an antibacterial polypropylene foaming plastic and a preparation method thereof. According to the invention, the composition comprises blended matrix resins, composite antimicrobial agents and chemical foaming agents, wherein in terms of 100 parts of matrix resins by weight, 0.5-5 parts of composite antimicrobial agents by weight are contained. The matrix resin is selected from a blend of polypropylene and low density polyethylene or high melt strength polypropylene. The composite antimicrobial agent is polyguanidinium / polysilicate composite antimicrobial agent which isobtained by mixing an auqeous solution of water soluble polyguanidinium inorganic acid salt or organic acid salt and an auqeous solution of water soluble silicate and then adding an auqeous solution of water soluble metal salt; the mole ratio of the water soluble polyguanidinium inorganic acid salt or organic acid salt and the water soluble silicate is 10:1-1:50; and the mole ratio of the water soluble silicate and the water soluble metal salt is 5:1-1:3. The polypropylene foaming plastic provided by the invention has multiple advantages of high sterilization rate, high resistance to water washing, light weight, heat insulation and the like and plays an important role in aspects like food packaging, household appliances and the like.

Description

technical field [0001] The invention relates to antibacterial plastics, more precisely, to an antibacterial polypropylene foam plastic and a preparation method thereof. Background technique [0002] Polypropylene (PP) foamed plastic products have good thermal stability (maximum service temperature up to 130°C) and good product dimensional stability at high temperatures, high toughness, tensile strength and impact strength, and excellent microwave adaptability It has attracted much attention due to its safety and environmental friendliness, thus becoming a good substitute for polystyrene (PS) foam plastics and polyurethane (PU) foam plastics. At present, polypropylene foam products are widely used in the field of food and food packaging, such as: trays, dishes, boxes, basins, beverage cups, sealed boxes and sealing gaskets for drinking water bottles, meat packaging, microwave tableware, etc. These areas have higher requirements for health and wellness. Therefore, the antiba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/06C08L79/00C08K13/02C08K3/34C08K3/36C08J9/10A01N59/16A01N59/06A01N47/44A01P1/00
Inventor 刘涛李杰张师军吕芸徐萌高达利张浩陈力
Owner CHINA PETROLEUM & CHEM CORP
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