Talc – Properties and Applications     
Genesis of Talc :

It was originated by the transformation of the magnesite mineral
Metamorphism Reaction of talc:
3 MgCO3 + 4 SiO2 + H2O ->3 MgO.4SiO2.H2O + 3 CO2

          (magnesite)                                         (Talc)



Talc  Properties:
Talc has specific properties due to their chemical structure:

  • Odorless, tasteless and insoluble in water;
  • Lamellar structure (thin plates after milling process);
  • Creamy texture;
  • Hardness 1 (lowest on Mohs mineral scale);
  • High oil absorption;
  • Low abrasiveness;
  • Non-explosive, inflammable.

    Talc applications:      
         
1)   Cosmetic and Pharmaceutical:  
                                                              
  Talc Properties for Cosmetic and Pharmaceutical applications:     

  • Lamellar structure / lubricity;
  • Low abrasiveness;
  • Creamy texture;
  • High oil absorption;

                                                                            

  • Odorless;
  • Non-hygroscopic ;
  • Low iron content (maintains odor stability of the essence);
  • Naturally white (without bleaching chemical process);
  • Chemically inert in the body.




Cosmetic and Pharmaceutical 


• This talc meets the requirements of USP35 and can be used in Cosmetic and Pharmaceutical Applications.

• USP35 (United States Pharmacopeia) establishes standards for medicines and food ingredients. These standards are used by regulatory agencies and manufacturers. 



 


2)   Pulp and Paper:
  Talc properties for Paper applications: 

- Lamellar structure (covering potential);

- High oil absorption (attraction to pitch).

Pitch: Resin particles and fatty acid that comes from wood.
 The talc is used as pitch control (the process of bleaching the paper)
 TALMAG PC75
 TALMAG PC20
 TALMAG GM7

 
 
3)   Plastics- Production Chain:

Polypropylene PP (e.g.: Braskem) + Talc
Extrusion companies: Companies that mix PP with talc. e.g.: Basell, Dow, Borealis, etc... Injection companies: Companies that make Injection companies : Companies that make the injection plastic parts (bumpers, panels, etc ) 

4)   Painting - Corrosion resistance and barrier properties:
 
                    
It is naturally hydrophobic. The lamellar format creates a physical barrier and increases the water path, improving the barrier properties and corrosion resistance.



- Lamellar structure (covering potential); 
- Talc (ultrafine grades) is used as TiO2 extender;  
- Non-explosive, inflammable.         

                                                 

5)   Food and Agribusiness:                                                     

- Lamellar structure / lubricity;

- Low abrasiveness;

- Chemically inert in the body.

- Odorless, tasteless

- Non-hygroscopic



6)   Olive Oil :                                  

- The talc improves the extraction of olive oil;

- Chemically inert in the body;

- Odorless and tasteless.





7)   Anticaking:               

- Lamellar structure (covering potential); 

- Anticaking effect avoiding the urea clustering (fertilizer).


|