Chemical composition: Hydroxyl functional copolymer solution containing acidic groups
Acid value: 30 mg KOH/g
Density (20 C): 1.12 g/ml
Non-volatile matter (10 min, 150 C): 80 %
Solvent: Propylene glycol monomethyl ether
Flash point: 48 C
The aluminum powder hardener can significantly increase the surface hardness and scratch resistance of the aluminum powder, so that the aluminum powder has good dispersibility, strong metallic feeling, high gloss, and can eliminate fingerprints. Guangzhou Tianlong Chemical Co., Ltd.’s aluminum powder hardener POL 02 or POL 25, the dosage is 0.5% of the total formula, and the dry blending method has higher hardness and deprinting effect.
Section 16 Antibacterial Agents
Antibacterial agents are additives that make powder coating films have antibacterial properties. Antibacterial agents used in antibacterial powder coatings can be divided into two categories: dissolution type and contact type. Inorganic antibacterial agents with silver ions as the main body are representative of the contact type. Generally, organic antibacterial agents belong to the soluble type. The characteristics of these two types of antibacterial agents are compared. Generally speaking, the antibacterial effect of the contact type antibacterial agent lasts for a long time, but the quick-acting effect is poor; the dissolving type antibacterial agent has a good quick-acting effect, best water based wax but the persistence is poor.
The composition and characteristics of inorganic antibacterial agents are shown in Figure 25-5. The carrier of the inorganic antibacterial agent is spherical particles made of porous zeolite and inorganic ion exchanger, and the surface layer of activated carbon body is wrapped on the outside, and the antibacterial metal is adsorbed on the carrier. Arranged in the order of increasing antibacterial properties are cadmium, zinc, nickel, copper, lead, silver, and mercury, with mercury having the strongest antibacterial properties. Considering the composition and characteristics of Antu 25-5 inorganic antibacterial agent and its antibacterial effect, 1 activated carbon: 2 an antibacterial metal; silver is widely used. Table 25-16 lists Japan’s commercialized 3-inorganic ion exchanger; 4-porous zeolite Hg*Ag≥PboC u>Ni-Zn-Cd representative silver inorganic antibacterial agent, domestic strong antibacterial effect one Silver-based inorganic antibacterial agents have also been produced.
Generally, zeolite, zirconium phosphate, silica, alumina and other materials with good heat resistance are used as silver carriers. Currently, powdered antibacterial agents are mainly used. Recently, water-soluble silver antibacterial agents with ultrafine particles are also commercially available. Because of the persistence of silver-based inorganic antibacterial agents. It has excellent antibacterial and safety properties, so it has recently been widely used as an antibacterial product in fiber products such as ballpoint pens, telephones, and socks.
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