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Preparation method of guanidine hydrochloride antibacterial agent modified maleic anhydride grafted co-polypropylene composite material

A technology of guanidine hydrochloride and maleic anhydride, which is applied in the field of preparation of antibacterial agent modified maleic anhydride graft random copolymerized polypropylene composite materials, can solve the problems of long-term influence of antibacterial agent, achieve good antibacterial effect, reduce Cost, good effect of antibacterial effect

Active Publication Date: 2020-08-04
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the guanidinium salt antibacterial material used as an implant is difficult to resist the secondary pollution of microorganisms, because the residual protein of biomacromolecules and killed microorganisms is easy to accumulate in the bactericidal layer, further blocking the interaction between antibacterial groups and bacteria. contact, causing other adverse reactions, which affects the durability of antibacterial agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a guanidine hydrochloride antibacterial agent modified maleic anhydride grafted random copolymerized polypropylene composite material, the preparation process specifically comprising the following steps:

[0032] (1) Preparation of guanidine hydrochloride antibacterial agent (PDMG):

[0033] Add 15 parts by weight of 1,6-hexamethylenediamine to 30 parts by weight of methyl silicone oil, heat to 55°C, slowly add 6 parts by weight of hydrochloric acid, stir for 1 hour, then add 10 parts by weight of dicyandiamide and stir at 100°C 2h, continue to add 12 parts by weight of dihydroxyethylpropionic acid and stir for 2h, after cooling to room temperature, dry in a vacuum oven at 70°C to obtain the guanidine hydrochloride antibacterial agent;

[0034] (2) Preparation of high grafting ratio maleic anhydride grafted random copolymerized polypropylene (PPR-g-MAH):

[0035] First soak 60 parts by weight of BR4101 random copolymerized polypropylene with 60 p...

Embodiment 2

[0040] A method for preparing a guanidine hydrochloride antibacterial agent modified maleic anhydride grafted random copolymerized polypropylene composite material, the preparation process specifically comprising the following steps:

[0041] (1) Preparation of guanidine hydrochloride antibacterial agent (PDMG):

[0042] Add 15 parts by weight of 1,6-hexamethylenediamine to 30 parts by weight of ethanol, heat to 55°C, slowly add 6 parts by weight of hydrochloric acid, stir for 1 hour, then add 10 parts by weight of ammonium hydrochloride and stir for 2 hours at 100°C, continue to add 12 parts by weight of dihydroxyethylpropionic acid were stirred for 2 hours, cooled to room temperature, and dried in a vacuum oven at 70°C to obtain the guanidine hydrochloride antibacterial agent;

[0043] (2) Preparation of high grafting ratio maleic anhydride grafted random copolymerized polypropylene (PPR-g-MAH):

[0044] First soak 70 parts by weight of BR4101 random copolymerized polypropy...

Embodiment 3

[0049] A method for preparing a guanidine hydrochloride antibacterial agent modified maleic anhydride grafted random copolymerized polypropylene composite material, the preparation process specifically comprising the following steps:

[0050] (1) Preparation of guanidine hydrochloride antibacterial agent (PDMG):

[0051] Add 15 parts by weight of 1,6-hexamethylenediamine to 30 parts by weight of ether, heat to 55°C, slowly add 6 parts by weight of hydrochloric acid, stir for 1 hour, then add 15 parts by weight of guanethidine and stir for 2 hours at 100°C, continue Add 12 parts by weight of dihydroxyethylpropionic acid and stir for 2 hours, after cooling to room temperature, dry in a vacuum oven at 70°C to obtain the guanidine hydrochloride antibacterial agent;

[0052] (2) Preparation of high grafting ratio maleic anhydride grafted random copolymerized polypropylene (PPR-g-MAH):

[0053] First swell 70 parts by weight of BR4101 random copolymerized polypropylene with 70 part...

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Abstract

The invention discloses a preparation method of a guanidine hydrochloride antibacterial agent modified maleic anhydride grafted polypropylene random copolymer composite material, which is characterized by comprising the following steps: adding 1,6-hexamethylenediamine into a liquid dispersion medium, and adding hydrochloric acid, a guanidine derivative and a carboxylic acid solution to obtain a guanidine hydrochloride antibacterial agent; swelling polypropylene random copolymer and a grafting aid, adding maleic anhydride, an antioxidant, a beta-nucleating agent and an initiator, and sequentially mixing, melting and granulating to obtain maleic anhydride grafted polypropylene random copolymer; and mixing the two substances with an organic solvent and a catalyst, and then carrying out melt extrusion and granulation. According to the antibacterial polypropylene random copolymer, the dispersity of PDMG in polypropylene random copolymer can be effectively improved, the antibacterial agent can stably exist in a PPR matrix, and the antibacterial effect is better and more stable; the molecular structure of the prepared composite material contains guanidyl and hydroxyl, so that the composite material has good hydrophilicity, no toxicity, stronger surface activity and permanent antibacterial activity.

Description

technical field [0001] The invention relates to a guanidine hydrochloride antibacterial agent modified maleic anhydride grafted random copolymerized polypropylene composite material and a preparation method thereof, belonging to the field of polymer materials, in particular to an antibacterial agent modified maleic anhydride grafted random copolymerized polypropylene Preparation method of propylene composite material. Background technique [0002] PPR, also known as random copolymerized polypropylene (PPR), has the advantages of good toughness, high strength, excellent processing performance, good creep resistance at relatively high temperatures and unique high transparency. PPR is one of the most widely used general-purpose plastics. It is mainly used in water supply systems of industrial and engineering buildings. It is generally obtained by extrusion or injection molding. Since PPR water supply pipes will not be easily replaced after installation, a large number of bacte...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08K5/31C08F255/02C08F222/06
CPCC08K5/31C08F255/02C08L51/06C08F222/06Y02P20/52
Inventor 贾润萍董香滨刘宝全倪锦平卢泰强
Owner SHANGHAI INST OF TECH
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