Antibacterial mildewproof polylactic acid composition and preparation method thereof

A technology of anti-bacterial and anti-mildew, anti-bacterial and anti-mold agent, which is applied in the field of anti-mold composition and anti-bacterial, can solve the problems of weak anti-mold performance and poor water resistance, and achieve good water resistance stability, good anti-bacterial and anti-mold effect, and good anti-bacterial The effect of anti-mold effect

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

[0007] In order to solve the problems faced in the prior art, the invention provides a kind of antibacterial and mildew-proof polylactic acid based on guanidinium salt polymer and its preparation method, which overcomes the disad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh polyhexamethylene guanidine propionate (Shanghai Gaoju F3000) 21.0g (0.098mol), join in 200mL deionized aqueous solution, stir to make it dissolve; In addition, weigh sodium pyrithione (Hangzhou Wanjing NPT ) 20.0g (0.134mol), added to 200mL deionized water, stirred to dissolve; at room temperature (about 25°C), slowly pour polyhexamethylene guanidine propionate into the aqueous solution of sodium pyrithione In, and constantly stirring, after mixing completely, fully stir again 20 minutes, the product is dried, pulverizes, obtains the polyhexamethylene guanidine pyrithione salt (antibacterial and antifungal agent 1#) of complete replacement.

Embodiment 2

[0049] Weigh polyhexamethylene biguanide hydrochloride (Shanghai Shande Industrial Co., Ltd. PHMB) 20g (0.091mol), join in 200mL aqueous solution, stir to make it dissolve; ) 35.0g (0.235mol), added to 200mL of water, stirred to dissolve; at 40°C, slowly pour polyhexamethylene biguanide hydrochloride into the aqueous solution of sodium pyrithione, and keep stirring, After the mixing is complete, stir fully for another 20 minutes, dry the product, and pulverize it to obtain a completely substituted polyhexamethylene biguanide pyrithione (antibacterial and antifungal agent 2#).

Embodiment 3

[0051] Weigh 21.0g (0.133mol) of polyhexamethyleneguanidine hydrochloride (Shanghai Gaoju F1000), add it to 200mL aqueous solution, and stir to dissolve it; g (0.080mol), was added to 50mL of water, stirred to dissolve; at room temperature (about 25°C), the aqueous solution of sodium pyrithione was slowly poured into the polyhexamethyleneguanidine hydrochloride solution, And keep stirring, after the mixing is complete, then fully stir for 20 minutes, the product is dried and pulverized to obtain partially substituted polyhexamethyleneguanidine pyrithione (antibacterial and antifungal agent 3#).

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Abstract

The invention relates to an antibacterial mildewproof polylactic acid composition and a preparation method thereof. The composition comprises the following mixed components: polylactic acid, an antibacterial mildewproof agent, and a dispersant; wherein on a basis of 100 parts by weight of polylactic acid, the composition comprises 0.3-2 parts by weight of antibacterial mildewproof agents, and 0-0.5 parts by weight of dispersants; the antibacterial mildewproof agent is a polyguanidine pyrithione antibacterial mildewproof agent which is obtained by mixing an aqueous solution of water-soluble polyguanidine inorganic acid salts or organic acid salts and an aqueous solution of sodium pyrithione; the molar ratio of the water-soluble polyguanidine inorganic acid salts or organic acid salts and sodium pyrithione is 1:(0.1-5). The polylactic acid composition of the invention has good antibacterial and mildewproof effect. The antibacterial effect on staphylococcus aureus and escherichia coli is up to 99.9%; the mildewproof grade for mold such as aspergillus niger, aspergillus terreus, paecilomyces varioti bainier, and the like reaches 0 grade; the composition has good water resistant stability, and has wide application prospects.

Description

technical field [0001] The invention relates to an antibacterial and antimold composition, and furthermore, relates to a polylactic acid composition with long-acting antibacterial and antimold properties and a preparation method thereof. Background technique [0002] In recent years, with the enhancement of people's awareness of environmental protection, countries around the world have increased investment in the research and production of biodegradable polylactic acid (PLA), which has been applied to people's daily necessities, packaging materials, fiber textiles and other fields. Polylactic acid has the advantage of biodegradation, but at the same time, the degradation of polylactic acid will produce some small molecular segments, which are easy to be used as food by bacteria and other microorganisms, especially in some humid and warm environments, some harmful bacteria and molds and other microorganisms It is easy to reproduce and is not conducive to people's health. Som...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L79/00
Inventor 李杰刘涛邹浩吕明福高达利徐凯张师军
Owner CHINA PETROLEUM & CHEM CORP
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