Characterization: Defoamer for aqueous printing inks and overprint varnishes (OPV ́s)
Chemical Structure: Emulsion based on organomodified polysiloxanes
Appearance: White emulsion
pH-Value: 8.0+-1
Non volatile matter: 26% +-1
Stabilities: SPACTIVE GA 3844 is sensitive to frost; after the impact of temperatures considerably below the freezing point irreversible changes could occur.
Storage: In closed original containers at room temperature (approx. 23 °C) the product will be stable for at least 12 months. Stir before use.
 
Properties
▪ Best balance between activity and compatibility
▪ Efficient defoaming and deaerating
▪ Let down defoamer with a high persistence
▪ Particularly suitable for manufacturing of printing inks and over print varnishes
▪ Easy to incorporate
▪ Containing silica
▪ VOC-free acc. to EU 2004/42/EG
▪ Free from mineral oils and APEO
▪ Cyclic silicones D4, D5, D6 < 0.1%
 
Application Fields
Due to its chemical structure SPACTIVE GA 3844 is particularly recommended for use in printing inks and clear formulations such as overprint varnishes.
 
Preferred fields of application:
▪ Printing inks and over print varnishes
 
Recommendation for Use
We generally recommend a dosage of 0.1 – 1.0 % calculated on the total formulation. The optimum dosage has to be determined through preliminary tests.
 
The defoamer can be added at any point of the production process at low to medium shear forces.