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Pigment Calcium Carbonate

Pigment Calcium Carbonate

Calcium Carbonate is a non- toxic odorless, non- irritating white powder and  one of the most versatile inorganic fillers. Calcium carbonate is neutral , substantially insoluble in water  and soluble in acid. According to different calcium carbonate production methods, calcium carbonate can be  divided into heavy calcium carbonate and  light carbon.

 

Calcium Acid , colloidal calcium carbonate and crystalline calcium carbonate  is a common  substance  on the earth. It  found in rocks such as vermiculite, calcite chalk, limestone, marble, travertine, etc.

 

It is also the main component of animal bones or shells. Calcium Carbonate is an important building material and is widely used in industry.

 

Application  of Calcium Carbonate  in latex paint :

The role of heavy calcium :

  • As a body pigment. It has a filling effect to make it fine , uniform , and white.
  • It has a certain dry hiding power, and generally uses  ultra- fine products. When the particle size is close to the particle size of titanium dioxide, the covering effect of  titanium dioxide can be  improved.
  • It can improve the strength, water resistance, dryness and  scrub resistance  of the  painting film.
  • Improve color retention.
  • Reduce the cost, the usage os 10%-50%. Disadvantages : high density , easy  to precipitate, the  amount of  use  should not be too large.

 

The role of light calcium. :

  • As a body pigment, it has a filling effect, is fine and increase whitenteness.
  • Has a certain dry hiding power.
  • The density is small, the specific surface area is large, and it has a  certain suspension property, and plays a  role of anti- settling.
  • Reduce costs.
  • Increase the feel. Disadvantages : easy to blaze , bloating , thickness. The amount of use should not be too  large, can not be used in exterior wall painting.

 

Application of calcium carbonate in powder coating :

  • It can be used as a filler for high gloss coating products.
  • Semi- gloss coating products can generally be directly added with calcium carbonate  without the addition  of matting agent, saving cost.
  • It is a white inorganic pigment that  can be  used in combination with titanium  dioxide to reduce costs.
  • Compared  with others fillers., calcium carbonate is most suitable  for environmentally   friendly products requiring low levels of   heavy metals. Such as children’s toys and baby carriages.
  • It can improve the powder rate and spray area of the paint, especially in the mixed powder.
  • If outdoor weather resistance is  required, it can not be used as filler.
  • Because of its high oil absorption, it is easy to cause orange peel on the  surface of the paint film. At this time a little hydrogenated castor oil can be added to the base material.
  • It acts as a skeleton to increase the thickness of the paint film and  improve the wear resistance and  durability of the coating.

 

Application of calcium carbonate in wood coatings.:

  • Filling material for colored primer to reduce cost.
  • Increase the film strength and wear resistance.
  • Light calcium has a little thickening effect, easy to change and good anti-sedimentation.
  • Heavy calcium reduces the sanding property  in the paint film , and it is  easy to precipitate in the tank, so  it is necessary to pay attention to strengthen the anti- sinking property.
  • Improve the gloss, dryness and whitening of the paint film.
  • It should not be  used together with  alkali-resistance pigments and filllers.

 

Application of calcium in automotive paint :

Ultra- fine calcium carbonate with particle size less than 80nm is used for anti- stone coating and topcoat of automobile chassis due to its good thixotropy. 

 

Application of calcium carbonate in ink :

Ultrafine calcium carbonate is used in inks, exhibits excellent dispersibility,transparency, excellent gloss and hidingpower, and excellent ink adsorption and drying properties, which must be activated to form spherical or cuboid crystals.


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