Why use plastic antistatic agents ? Because plastics have electrical extinction (except for conductive polymers), static electricity will accumulate when plastics come into contact with or rub against other materials. Accumulated static electricity, if not eliminated in time, may cause electrostatic adsorption, vacuuming, cremation, etc., causing combustion and explosion. . The method for eliminating static electricity includes a conductive material (conductive carbon black, metal powder, etc.) filling method, a conductive device method, and an antistatic agent. Among them, the plastic antistatic agent is a multi-system surfactant, which can make the surface of the plastic affinity with water, and the ionic surfactant also has a conductive effect, so that the static electricity can be leaked in time.
About the variety of plastic antistatic agents:
According to whether the hydrophilic group in the antistatic agent molecule can be ionized, it is divided into two types: ionic type and non-ionic type. The ionic antistatic agent is further classified into four types: cationic type, anionic type, nonionic type and zwitterionic type according to the positive and negative charges of the ionization.
1. Cationic antistatic agent:
(1) Monofunctional group: stearyl trimethyl quaternary ammonium salt, mainly used for polyolefin, ABS, polycarbonate, etc.;
(2) Bifunctional group: antistatic agent Stearic acid propyl hydroxyethyl i quaternary amine nitrate acid salt, mainly used as antistatic agent for polyester, polyvinyl chloride, polyethylene thin and products.
2. Anionic antistatic agent:
(1) a monofunctional antistatic agent sodium p-nonylphenoxypropyl sulfonate (NP), mainly used for chloroacetic resin, ABS, polyolefin, etc.;
(2) a multifunctional antistatic agent alkyl bis(α-hydroxyethyliamine phosphoric acid ester), mainly used for synthetic fibers;
(3) The polymer type antistatic agent is a polyacrylic acid ester, a salt of a maleic anhydride and another unsaturated monomer copolymer, polystyrene benzenesulfonic acid or the like. Mainly used for fiber.
3. Non-ionic antistatic agent:
(1) Tetrabromobisphenol A is mainly used for ABS, epoxy resin, and polyurethane. Also a flame retardant;
(2) Stearic acid monoglycerides, such as ADA-10M and ASA-10, are mainly used for polyolefins.
4. Amphoteric antistatic agent:
(1) alkyl dicarboxymethyl imidinolide, mainly used for polyester, nylon, etc.;
(2) Dodecyl dimethyl ibi-7 inner salt, mainly used for polyester, polypropylene, nylon, and the like.
Various antistatic agents have different chemical properties and different properties, and the effects are different.
How to use antistatic agent:
Depending on the mode of use, antistatic agents can be classified into two types: external coating type and internal mixing type.
The outer coating type antistatic agent refers to a type of antistatic agent used for coating on the surface of a polymer material. Generally, it is formulated into a solution having a mass fraction of 0.5% to 2.0% by using water or ethyl alcohol, and then attached to the surface of the polymer material by coating, spraying or dipping, and then passed through room temperature or hot air. Dry to form an antistatic coating. These are mostly cationic antistatic agents, and some are amphoteric and anionic antistatic agents.
The internal mixed type antistatic agent refers to a type of antistatic agent added to the resin during the processing of the product. The resin and the antistatic agent added with 0.3% to 3.0% of its mass are usually mechanically mixed and then processed. Such non-ionic and polymeric permanent antistatic agents are mainly used, and anionic and cationic types can also be added in some varieties.
In addition to imparting certain lubricity to the surface of the polymer material, reducing the friction coefficient, suppressing and reducing the generation of static charge, various antistatic agents have different chemical compositions and different ways of use, and the mechanism of action is also different.
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