The difference between anti-mold and preservation in coatings

2021-10-09   Pageview:107

In general, within the coating, must not be missing is the coating heavy anti-corrosion additives and coating anti-mildew additives, the conventional addition of heavy anti-corrosion agent additives, coated walls, metal products, plastic products to play the role of external harmful microorganisms, physical wear and corrosion, to extend the coating, coating under the surface of the product color, service life, etc.

The coating anti-mildew additives, in the relatively meticulous harsh environment (more humid environment), coated on the coating products can be a long-term eradication of harmful mold erosion, to avoid the growth of mold, mildew and other phenomena in the coating.

 

 

 

 

 

 

 

 

 

 

 

 

In addition to the above two fatty acid polyol ester structures, mono-fatty acid ester structure products of polyols such as pentaerythritol and trimethylolpropane can also be used as antistatic agents for polymers.
2. Antistatic agent of ethylene oxide adduct of fatty acid, fatty alcohol and alkylphenol
In the presence of basic catalysts, fatty acids, fatty alcohols, alkylphenols and other molecules containing active hydrogen compounds react with ethylene oxide, resulting in the introduction of polyethylene glycol polar groups in the molecule, and long carbon chains The fatty alkyl and alkyl phenyl groups have non-polar characteristics and show antistatic properties.
The ethylene oxide adduct antistatic agent of fatty acid, fatty alcohol and alkylphenol has the following general structural formula:
RCO-CH, CH: HRO(CH, CH2OHR-O(CHCH: 0%H Fatty abdominal ft wax ethylene oxide adduct Fatty alcohol ethylene oxide adduct alkylphenol ethylene oxide adduct

The synthesis reaction is as follows:
The addition number of ethylene oxide is mostly 1~3mol. As the amount of the substance increases, the water solubility increases, and the compatibility with non-polar polymers decreases.
Ethoxylated amine antistatic agent
Ethoxylated amine antistatic agents are the most widely used non-ionic antistatic agents. From the perspective of the global market, their annual consumption accounts for more than 30% of the total consumption of antistatic agents for polymers. This is because ethoxylated amine antistatic agents have outstanding antistatic performance, thermal stability, and low toxicity. However, this kind of amine product has a chemical attack on the polymer in the circuit board, leading to material embrittlement and stress cracking. This has been replaced in recent years. The most powerful competitor is ethoxylate. Base amide antistatic agent.

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