1,3-propanediol (1,3-PDO) is colorless, Odorless, transparent and viscous liquid, hygroscopic, miscible with water, alcohol and various organic solvents. It is an important organic chemical raw material, mainly used in inks, coatings, cosmetics, pharmaceuticals, antifreeze and other industries.
The following suppliers of propylene glycol will help you understand the application of 1,3 propylene glycol in coatings:
Using 1,3 propylene glycol as raw material to synthesize paint, you can The organic combination of elasticity and hardness makes it more widely used, such as being used as outer coating of serpentine pipes, can paint and powder coating materials. It has excellent properties that are currently only possible with the rather expensive 1,6-hexanediol. Carboxy functional polyester epoxy resin powder coating based on 1,3 propylene glycol, epoxy resin is the cross-linking agent, 1,3 propylene glycol significantly modifies the carboxylic acid functional polyester-epoxy coating polyester, improving flexibility and impact resistance characteristics, making its key performance unchanged over a wide PDO range. The melt viscosity of 1,3 propylene glycol-modified polyester is lower than that of polyester prepared with 100% propylene glycol.
1,3 Propylene glycol is also used as a film-forming additive in coatings. In order to meet the construction requirements, film-forming additives are often added to latex paint to change the minimum film-forming temperature of the paint, thereby forming a smooth and non-porous coating film. As the dosage of 1,3-propylene glycol and Texanol increases, the hardness of the coating film shows a downward trend, and the drying time also increases, because the presence of 1.3-PDO increases the solubility of latex particles in the water dispersion system, and Texanol emulsifies The latex particles are removed, making it easier for the latex particles to deform during film formation, so the hardness of the coating film decreases, which is manifested as decreased hardness and prolonged drying time during testing.
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