Wuhan modern antifungal agent (microbicide) and protective agent
DATE：2020/12/19 9:03:27 / READ： / SOURCE：This station
Wuhan modern antifungal agent (microbicide) and protective agent
Microorganisms, molds and bacteria can affect the appearance, performance and use value of plastics. Some higher-level organisms, such as insects, rodents, birds, mollusks and crustaceans, can also damage plastic products. In order to prevent or suppress the above disasters, Anti-fungal agents (microbicide) and protective agents are often added before molding.
1. Definition and requirements of antifungal agents www.handern.com PP/PE/PC fluted-Sheet-Extrusion-Line
Microorganisms such as molds and bacteria can deteriorate plastics (resins or additives, especially plasticizers, lubricants, etc.), which include changes in composition and breakage of chemical bonds, showing changes in color, smell or weight, brittleness and electrical changes , Exudation, reduction of tensile strength and elongation, etc. The chemical additives used to prevent the degradation and damage caused by microorganisms must be able to kill or inhibit the growth of microorganisms. These additives are called microbial killers or biological inhibitors, and are customarily called antifungal agents. Because fungi, commonly known as molds, are the main source of harm.
The ideal antifungal agent should have the following conditions:
(1) It has extremely high killing power against fungi that erode polymer materials, has a wide range of applications, long-lasting effectiveness, and is effective at low concentrations;
(2) It has little toxicity to humans and animals, no odor, and no damage to human skin;
(3) It is compatible with plastics and additives, and does not undergo chemical reactions with each other, and does not affect the physical and chemical properties of plastics;
(4) No sublimation, low water solubility, colorless or light-colored appearance, no pollution to the product;
(5) It has good light, heat and chemical stability;
(6) Stable storage, convenient use, and low price.
2. Varieties of antifungal agents
There are many types of antifungal agents, mainly in the following five categories :www.handern.com PP/PE/PC fluted-Sheet-Extrusion-Line
(1) Phenolic compounds Phenol, chlorophenol and their derivatives have strong bactericidal power and low price.
(2) Organic mercury compounds are highly toxic and have the strongest bactericidal power. They are often used as pesticides, as well as plastic protective agents and antifungal agents.
(3) Organotin compounds have strong bactericidal power and low toxicity, but are still harmful to the human body. Among them, the RɜSnX type has the strongest bactericidal power. Widely used in plastics and other products.
(4) Organic copper has low toxicity and is safe to use, but it is volatile and has yellow-green.
(5) Other organic arsenic, organic, organic sulfur, organic halide, nitrogen heterocyclic compound, etc.
3. Protective agent
Additives added to prevent insects, birds, rodents, and marine organisms from damaging plastics are called protective agents. www.handern.com PP/PE/PC fluted-Sheet-Extrusion-Line
The protective agent should have suitable comprehensive properties, be harmless to the human body, have no side effects on the material to be protected, have low use cost, be compatible with plastics, be able to withstand molding processing temperatures, and have durability.
Trimethyl phosphate can prevent termites, and trinitrobenzene complex can effectively prevent damage by Egyptian rats. Tetrathiuramized disulfide and zinc dimethylsulfurate-cyclohexamine complex also have this effect, but the efficiency is less.
Microorganisms, molds and bacteria can affect the appearance, performance and use value of plastics. Some higher-level organisms, such as insects, rodents, birds, mollusks and crustaceans, can also damage plastic products. In order to prevent or suppress the above disasters, Anti-fungal agents (microbicide) and protective agents are often added before molding.
1. Definition and requirements of antifungal agents www.handern.com PP/PE/PC fluted-Sheet-Extrusion-Line
Microorganisms such as molds and bacteria can deteriorate plastics (resins or additives, especially plasticizers, lubricants, etc.), which include changes in composition and breakage of chemical bonds, showing changes in color, smell or weight, brittleness and electrical changes , Exudation, reduction of tensile strength and elongation, etc. The chemical additives used to prevent the degradation and damage caused by microorganisms must be able to kill or inhibit the growth of microorganisms. These additives are called microbial killers or biological inhibitors, and are customarily called antifungal agents. Because fungi, commonly known as molds, are the main source of harm.
The ideal antifungal agent should have the following conditions:
(1) It has extremely high killing power against fungi that erode polymer materials, has a wide range of applications, long-lasting effectiveness, and is effective at low concentrations;
(2) It has little toxicity to humans and animals, no odor, and no damage to human skin;
(3) It is compatible with plastics and additives, and does not undergo chemical reactions with each other, and does not affect the physical and chemical properties of plastics;
(4) No sublimation, low water solubility, colorless or light-colored appearance, no pollution to the product;
(5) It has good light, heat and chemical stability;
(6) Stable storage, convenient use, and low price.
2. Varieties of antifungal agents
There are many types of antifungal agents, mainly in the following five categories :www.handern.com PP/PE/PC fluted-Sheet-Extrusion-Line
(1) Phenolic compounds Phenol, chlorophenol and their derivatives have strong bactericidal power and low price.
(2) Organic mercury compounds are highly toxic and have the strongest bactericidal power. They are often used as pesticides, as well as plastic protective agents and antifungal agents.
(3) Organotin compounds have strong bactericidal power and low toxicity, but are still harmful to the human body. Among them, the RɜSnX type has the strongest bactericidal power. Widely used in plastics and other products.
(4) Organic copper has low toxicity and is safe to use, but it is volatile and has yellow-green.
(5) Other organic arsenic, organic, organic sulfur, organic halide, nitrogen heterocyclic compound, etc.
3. Protective agent
Additives added to prevent insects, birds, rodents, and marine organisms from damaging plastics are called protective agents. www.handern.com PP/PE/PC fluted-Sheet-Extrusion-Line
The protective agent should have suitable comprehensive properties, be harmless to the human body, have no side effects on the material to be protected, have low use cost, be compatible with plastics, be able to withstand molding processing temperatures, and have durability.
Trimethyl phosphate can prevent termites, and trinitrobenzene complex can effectively prevent damage by Egyptian rats. Tetrathiuramized disulfide and zinc dimethylsulfurate-cyclohexamine complex also have this effect, but the efficiency is less.
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