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Antibacterial mildew-proof polylactic acid composition and foamed beads, preparation method, thereof, and molded body

A polylactic acid foaming, antibacterial and anti-mold technology, applied in the field of antibacterial and anti-mold polylactic acid foamed beads preparation, antibacterial and anti-mold polylactic acid foamed beads, can solve the problem of product shape and particle size control Good, cumbersome steps, complicated process, etc., to achieve the effect of excellent antibacterial and antifungal properties, uniform pore size distribution, and simple production and operation

Inactive Publication Date: 2019-12-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above patent documents that the conditions for preparing guanidinium salt polymer powder in CN101037503A and CN1350022A are relatively harsh and the process is relatively complicated; in CN1445270A and US7282538B2, it is necessary to make guanidinium salt polymer into antibacterial masterbatch, the steps are cumbersome and the cost is high; CN102453315A, CN102453316A need to use sodium pyrithione, and the cost is relatively high; CN102453273A needs to operate at a certain temperature in the process of preparing antibacterial agent, the energy consumption is large, and the shape and particle size of the product after drying and crushing are not well controlled

Method used

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  • Antibacterial mildew-proof polylactic acid composition and foamed beads, preparation method, thereof, and molded body

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preparation example Construction

[0028] The preparation method of the polylactic acid base resin described in the present invention can adopt conventional methods in this field, for example including but not limited to the following methods:

[0029] (1) A method of direct dehydration polycondensation of lactic acid or a mixture of lactic acid and aliphatic hydroxycarboxylic acid;

[0030] (2) A method of ring-opening polymerization of cyclic dimers (ie lactide) of lactic acid;

[0031] (3) A method of subjecting cyclic dimers of lactic acid and aliphatic hydroxycarboxylic acids, such as lactide and glycolide and ε-caprolactone, to ring-opening polymerization in the presence of a catalyst;

[0032] (4) A method of direct dehydration polycondensation of a mixture of lactic acid, aliphatic dibasic alcohol and aliphatic dibasic acid;

[0033] (5) A method of polycondensing lactic acid, aliphatic dibasic alcohols, and aliphatic dibasic acids in an organic solvent;

[0034] (6) A method of subjecting a lactic ac...

Embodiment 1

[0105] (1) Preparation of guanidinium salt composite antibacterial agent

[0106] a, polyhexamethyleneguanidine hydrochloride (Shanghai Gaoju Industrial Co., Ltd.) 1000.0g is dissolved in water and is mixed with the aqueous solution of mass concentration 20%; It is the aqueous solution of 25% mass concentration that 50.0g zinc sulfate is mixed with, 125.0 The g styrene-butadiene latex solution was directly used after radiation crosslinking, and the concentration was 40%. b. Add the prepared guanidinium salt polymer aqueous solution into the container containing the zinc-containing aqueous solution, and stir while adding until uniformly mixed to form a transparent liquid mixture. c. Add the liquid mixture in step b to the latex solution, and stir while adding until the mixture is uniform. Then, add 5.0 g of anti-migration agent (Covestro 2794 XP). d. Dry the mixture obtained in step c with a spray dryer to obtain a solid powder; transfer the obtained solid powder to a high-s...

Embodiment 2

[0122] (1) Preparation of guanidinium salt composite antibacterial agent

[0123] a, polyhexamethylene guanidine propionate (Shanghai Gaoju Industrial Co., Ltd.) 1000.0g is dissolved in water and is mixed with the aqueous solution of mass concentration 40%; 100.0g zinc acetate is mixed with the aqueous solution that mass concentration is 15%, 150.0 The g nitrile latex solution was directly used after radiation crosslinking, and the concentration was 30%. b. Add the prepared guanidinium salt polymer aqueous solution into the container containing the zinc-containing aqueous solution, and stir while adding until uniformly mixed to form a transparent liquid mixture. c. Add the liquid mixture in step b into the latex solution, and stir while adding until the mixture is uniform. Then, 5.0 g of anti-migration agent (Covestro 2794 XP). d. The mixture obtained in step c is dried by a spray dryer to obtain a solid powder; the obtained solid powder is transferred to a high-speed mixe...

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Abstract

The invention belongs to the field of antibacterial materials and products thereof, and relates to an antibacterial mildew-proof polylactic acid composition and foamed beads, a preparation method thereof, and a molded body. The antibacterial mildew-proof polylactic acid composition contains polylactic acid base resin, a guanidine salt composite antibacterial agent, a mildewproof agent and an auxiliary agent, wherein the auxiliary agent contains a foam nucleating agent and an optional antioxidant; based on 100 parts by weight of polylactic acid base resin, the content of the guanidine salt composite antibacterial agent is 0.05 to 2.0 parts by weight, the content of the mildew preventive is 0.01 to 5.0 parts by weight, the content of the foam nucleating agent is 0.01 to 10 parts by weight, and the content of the antioxidant is 0 to 10 parts by weight. The antibacterial and mildewproof polylactic acid composition is good in antibacterial and mildewproof effects and the water resistance isalso improved;, the foaming beads prepared from the antibacterial and mildewproof polylactic acid composition have impact resistance and low molding temperature; the molded product is excellent in antibacterial and mildewproof performance and high in compression strength.

Description

technical field [0001] The invention belongs to the field of antibacterial materials and products thereof, and more specifically relates to the preparation of an antibacterial and antimold polylactic acid composition, an antibacterial and antimold polylactic acid foamed bead, and an antibacterial and antimold polylactic acid foamed bead method, and an antibacterial and antifungal polylactic acid foamed bead molded body. Background technique [0002] As a fully biodegradable thermoplastic aliphatic polyester, polylactic acid (PLA) has the characteristics of non-irritating, non-toxic, good bioabsorption and compatibility, high mechanical strength and good processability. . PLA is mainly made of starch raw materials extracted from renewable plant resources (such as corn, palm, straw and other high cellulose). These starches are hydrolyzed to obtain glucose, and then fermented by certain strains to produce high-purity lactic acid, and then chemically synthesized to obtain poly...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L79/00C08J9/04C08J9/228C08J9/16
CPCC08J9/04C08J9/16C08J9/228C08J2367/04C08J2479/00
Inventor 郭鹏吕明福徐耀辉张师军李杰张琦尹华
Owner CHINA PETROLEUM & CHEM CORP
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