Introduction of Sago®-7600 Adhesion Promoter

2021-11-28   Pageview:124

Sago®-7600 is a polyester phosphate adhesion promoter.

Sago®-7600 enhances the adhesion of solvent-borne and water-borne coating systems and significantly improves the adhesion of paint films to metal substrates (including metal substrates after water immersion and condensation tests) such as steel, aluminum and other non-ferrous metal surfaces, especially for aluminum, and also for cold rolled and galvanized steel.

 

 

 

 

 

 

 

 

 

 

 

The effect of leveling agent Moda flow Powder 2000 and Moda-flow Powder Ⅲ on the shrinkage reduction effect of epoxy polyester powder coating film; see the effect of leveling agent on the distinct image property (DOI) of epoxy polyester powder coating film Figure 25-2; The effect of leveling agent on polyester/TGI C  (triglycidyl isocyanurate) ptfe modified pe wax coating powder coating film shrinkage reduction effect is shown in Figure 25-3; The amount of leveling agent on polyester/TGI C powder The impact of paint film vividness.

The amount of leveling agent must reach a certain level in order to achieve satisfactory film leveling and vivid image effects, but the effect is not obvious when the amount is increased after a certain amount.

Considering the glass transition temperature and storage stability of the powder coating, the low limit of the leveling agent is good, but the high limit of the leveling agent is good considering the dispersibility of the cluster leveling agent and the reduction of the melt viscosity of the powder coating. The dosage of leveling agent should be selected according to the formula composition and theoretical dosage, combined with the appearance of the powder coating film. If the amount of leveling agent is too low, the coating film is prone to shrinkage; when the amount of leveling agent is too much, the storage stability of the powder coating is not good, the surface of the coating film is prone to fog, and it is easy to leave fingerprints when touched by hand , Even when the coating film is sprayed thick, it is prone to sagging and other phenomena. Therefore, it is necessary to choose a more appropriate amount of leveling agent. Of course, we can’t ignore the selection of suitable leveling agents according to the types of powder coating resins.

The brightener is to improve the wettability of the pigment and filler in the resin and curing agent during the manufacturing process of the powder coating, so that the dispersibility is good. At the same time, the powder coating can better reduce the surface tension and make the surface surface The tension is evenly distributed, and it is an auxiliary agent to avoid the defects such as shrinkage of the coating film. It can also act as a leveling agent.

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