Antibacterial master batch based on guanidinium polymer and preparation method thereof

A technology of antibacterial masterbatch and compound antibacterial agent, which is applied in the field of antibacterial masterbatch and its preparation, can solve the problems of low melting point of guanidine-based polymers, difficulty in cleaning, and reduced antibacterial efficiency, and achieve good washing resistance, good antibacterial effect, The effect of high antibacterial efficiency

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high hygroscopicity and the generally low melting point of guanidinium salt polymers, usually lower than 120°C, the following problems are prone to occur when preparing masterbatches: (1) The guanidinium salt polymers are easy to dissolve in the mixer during the mixing stage. It is not easy to mix evenly with the matrix resin, dispersant or other components, and it is difficult to clean up after the wall is attached; (2) In the granulation stage, due to the low melting point of the guanidine-based polymer, it is easy to absorb moisture. It is very easy to block the feeding section of the screw, resulting in no feeding and no granulation, and the guanidinium salt polymer is also easy to stick to the wall of the feedin

Method used

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  • Antibacterial master batch based on guanidinium polymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) Weigh 1000.0g (4.65M) of polyhexamethyleneguanidine propionate (Shanghai Gaoju F3000), add it to 3000mL deionized water solution, stir to dissolve it, and call it solution A; (2) otherwise call it Sodium silicate (chemically pure) 700.0g (2.46M), was added to 3000mL deionized water, stirred to dissolve, called solution B; (3) at room temperature (about 25°C), solution A and solution B Mix and fully stir for 30 minutes to form solution C; (4) weigh ZnSO 4 (Chemical pure) 1800.0g (6.26M), added to 3000mL deionized water, stirred to dissolve, then slowly poured into solution C, and vigorously stirred for 5min, the precipitate was filtered, dried, and pulverized to obtain poly Hexamethyleneguanidine propionate / zinc polysilicate composite antibacterial agent (composite antibacterial agent 1).

Embodiment 2

[0040] (1) Weigh 1000.0g (4.65M) of polyhexamethyleneguanidine propionate (Shanghai Gaoju F3000), add it to 3000mL deionized water solution, stir to dissolve it, and call it solution A; (2) otherwise call it Add 1000.0g (3.52M) of sodium silicate (chemically pure) into 5000mL of deionized water, stir to dissolve, and call it solution B; (3) Mix solution A and solution B, and stir well at 50°C for 1 hour, Form solution C; (4) take by weighing ZnSO 4 (Chemical pure) 1200.0g (4.17M), added to 3000mL deionized water, stirred to dissolve, then slowly poured into solution C, and vigorously stirred for 10min, the precipitate was filtered, dried, and pulverized to obtain poly Hexamethyleneguanidine propionate / zinc polysilicate composite antibacterial agent (composite antibacterial agent 2).

Embodiment 3

[0042] (1) Weigh 1000.0g (6.35M) of polyhexamethyleneguanidine hydrochloride (Shanghai Gaoju F1000), add it to 3000mL deionized water solution, stir to dissolve it, and call it solution A; Sodium silicate (chemically pure) 1500.0g (5.28M), added to 6000mL deionized water, stirred to dissolve, called solution B; (3) at room temperature (about 25°C), mix solution A and solution B , and fully stirred for 1.5h to form solution C; (4) weigh Ca(NO 3 ) 2 (Chemical pure) 1200.0g (5.08M), added to 3000mL deionized water, stirred to dissolve, then slowly poured into solution C, and vigorously stirred for 10min, the precipitate was filtered, dried, and pulverized to obtain poly Hexamethyleneguanidine hydrochloride / calcium polysilicate composite antibacterial agent (composite antibacterial agent 3).

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Abstract

The invention provides an antibacterial master batch based on a guanidinium polymer and a preparation method thereof. The antibacterial master batch comprises the following blended components: a matrix resin, a composite antibacterial agent and a dispersant, wherein, on the basis of 100 parts by weight of the matrix resin, the composite antibacterial agent is 10 to 30 parts by weight, the dispersant is 2 to 10 parts by weight, the matrix resin is at least one selected from the group consisting of low-density polyethylene and high-melt index polypropylene, and the composite antibacterial agentis a polyguanidine/polysilicate composite antibacterial agent and is prepared by mixing an aqueous solution of water-soluble polyguanidine inorganic acid salt or organic acid salt with an aqueous solution of water-soluble silicate and adding an aqueous solution of water-soluble metal salt. The antibacterial master batch is used for antimicrobial modification of polypropylene, and addition amount of the antibacterial master batch is 2 to 10 wt % of the matrix material polypropylene; prepared modified polypropylene has the advantages of high antibacterial efficiency, a white color, good washingfastness, etc.

Description

technical field [0001] The invention relates to a masterbatch used for an antibacterial composition, and furthermore, to an antibacterial masterbatch used for antibacterial modification of polypropylene and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and the increasing awareness of health and hygiene, antibacterial requirements have been put forward for many plastic products. As one of the largest varieties of general-purpose plastics, polypropylene is widely used in the preparation of daily necessities. Therefore, the antibacterial modification of polypropylene has always been a hot spot in the field of antibacterial research. [0003] During the processing of polypropylene products, such as injection molding, blow molding, extrusion, etc., adding a certain amount of antibacterial masterbatch can endow the final polypropylene products with antibacterial function. Due to the advantages of flexible application...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L79/00C08K3/34
Inventor 李杰张丽英邵静波尹华徐萌王丹张师军
Owner CHINA PETROLEUM & CHEM CORP
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