How can I easily prepare a ready-to-use film coating suspension?

Here is BIOGRUNDs step-by-step guide how to prepare a suspension. Please be aware that all parameters have to be adjust individually.

Equipment & Material Equipment: propeller stirrer, beaker Material: Water, AquaPolish

Here is a simple calculation for a suspension with for example 20 % solids content:

• AquaPolish® : 20 (%) 200g
• Water : 80 (%) 800g
• Total : 100 (%) 1000g

1. Positioning the stirrer and beaker
   Diameter of the stirrer should be one third of the vessels diameter. The stirrer should be placed centrally in the lower third of the beaker.
2. Creating a vortex
   As soon as the stirrer is in the right position, it can be started. Now it is important that the speed is high enough that a vortex is visible. Create a vortex without drawing too much air into the solution by adjusting an appropriate stirrer speed. It is important that the chosen stirrer has enough power and is usable for high viscosities.
3. Adding AquaPolish
   Add the total quantity of AquaPolish® quickly and gradually into the vortex. Flotation of powder must be avoided. Increase stirrer speed if necessary to obtain a vortex. The AquaPolish® should not be added to the suspension at once. Increasing the stirrer speed: The rotational speed has to be adjusted during the constant addition of AquaPolish® as the viscosity of the suspension increases due to the dissolving process.
4. Set timer for 45 minutes
   Allow the dispersion to be agitated gently for about 45 minutes. The resulted dispersion should be lump free. After 45 minutes of stirring the suspension is ready to use.
   Important: Continue stirring during the spray process!

Contact Biogrund for technical support: [email protected] 

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Biogrund’s ready-to-use products are homogeneous dry powder mixtures that contain all the ingredients for a perfect film coating. They are easily soluble in water or organic solvent. In only one step the user can prepare his spray suspension ready for use. Ready-to-use powder blends for film coatings contain film-forming polymers, fillers, pigments, plasticizers and binders. ´The respective formulation is adapted to the customer’s specific requirements.

Definition ready-to-use: There is no or only minimal effort for the user of the system.

 

The advantages of ready-to-use systems

• Color development – almost any color is possible
• Only one material, only one certificate of analysis
• Short and easy preparation
• Reproducible quality / batch-to-batch consistency
• Low supply chain risk, only one supplier
• Simple logistical handling