Application of stearate in coating industry

2021-10-10   Pageview:69

Stearate has lubricity, water repellency, calendering and high melting point, and is widely used as lubricant, water repellant, stabilizer, mold release agent, decolorizer, thickener, bactericide and catalyst in industry.

In the coating industry, stearate is mainly used as a drying agent to accelerate the oxidation polymerization of fatty components in coatings. The stearate desiccant for paint can be divided into two categories: one is as the main component, generally using cobalt, manganese, iron, cerium salt; the other is the auxiliary desiccant, generally using lead, calcium, zinc, zirconium salt. Most of the stearate salts used as paint desiccants are cyclic acid and resin acid metal salts, and these stearate salts can be treated with hydrocarbon organic solvents when they are used.

 

 

 

 

 

 

 

 

 

 

 

Zinc is cheap, and at the same time it can impart excellent corrosion resistance to copper and iron, so it has formed a widely used zinc-rich coating.

2. Metal oxide series conductive agent
Metal oxide conductive agents mainly include tin oxide, zinc oxide, and titanium oxide. Because of their low density, good stability in the air and the preparation of white, light-colored or transparent coatings, they are widely used in coatings.

Tin oxide
Pure tin oxide is an insulator and can only become a semiconductor when its composition deviates from the chemical ratio, produces lattice defects, and is doped. The resistivity of transparent silver tin oxide film doped with 5%~10% tin made by non-coating methods, such as physical vapor deposition (PVD) method, measurement method, ion spraying method, can reach 10-4~10- +0+em71.

Antimony tin dioxide (A TO) is a new type of multifunctional transparent antistatic and conductive material[241. It is made into nanometer level (average particle size 20~50nm, specific ptfe powder suppliers surface area 80m³/g), which can be used in miniaturization , Integration and other aspects have been widely used. Nano-level A TO transparent antistatic film material has obvious advantages compared with traditional transparent antistatic materials. First of all, ATO film not only has high light transmittance in the visible light range, but also shows the conductivity of metalloid characteristics. Under many application conditions, the color and transparency of the product can meet certain requirements, while carbon black and other traditional The antistatic film material inevitably affects the quality of the final product; secondly, the A TO transparent antistatic film has good chemical stability, thermal stability and weather resistance, and the A TO conductive film layer has good adhesion to the substrate. The mechanical strength is high, and it is not restricted by the climate and the use environment.

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