Calcium Stearate

Calcium StearatePVC LubricantsProducts

Calcium Stearate

 

 

Calcium stearate is obtained from the reaction of stearic acid and lime.

 

It is a fine powder, white and silky to the touch, with the following properties:

 

  • It is very stable under high temperature conditions
  • It is non-toxic and is even used as a food additive, E470
  • It is highly resistant to water and has water-repellent properties
  • It serves as a lubricant, stabilizer and thickener in various processes.

 

You can buy 50% liquid calcium stearate emulsion, which makes even distribution, dosage and handling easier.

 

We also have a dust-free/granulated product which is very suitable for pneumatic conveyance; it has a more precise dose and is cleaner.

 

 

  • Manufacturing of Plastics

 

It is an excellent solid lubricant used in injection and extrusion processes.

 

It is also used as a stabilizer with which it is possible to obtain properties of better transparency, good colour maintenance, good long-term stability, low odour, low migration and volatility, and resistance to weather conditions.

 

In the manufacture of PVC, calcium stearate neutralizes hydrochloric acid, HCl, which can be released from PVC, prolonging its life.

 

It can be used in the following plastics:

 

  • Acrylonitrile Butadiene… (ABS)
  • Polypropylene (PP)
  • Vinyl polychloride (PVC)
  • Polyethylene (PE)
  • Polyamide (PA)
  • Polystyrene (PS)
  • Sheet and bulk moulding (SMC/BMC)

 

 

  • Separating Agent: Rubber, Plastic and Ceramics

 

Unlike other separating agents, stearates are characterized by their high melting point, so they can be used just like graphite as a dry lubricant added as a fine powder.

 

Among the industries that work with calcium stearate as a separating agent are:

 

  • Metal
  • Rubber
  • Plastic
  • Ceramic

 

The separating agent is usually used in different forms, in diffusers as the final product, emulsion stearate, or by the dosing in the form of chippings or raw material.

 

  • Water Repellent in Construction

 

A small addition of calcium stearate in solid or emulsion in small proportions, between 1% and 6% with respect to cement, significantly improves the water-repellent properties of the mixture.

 

In this way, in addition to providing impermeability to the mixture, the appearance of efflorescence is avoided. Within the construction sector, Mateos, S.L. provides calcium stearate to the following industries:

 

  • Prefabricated concrete
  • Mortar
  • Floors
  • Terrazo
  • Ceramic tiling and concrete

 

In the prefabs industry, emulsion stearate is widely used, while the powder form is used in the manufacture of mortars and putties.

 

 

  • Anti-Caking

 

It is used in cosmetic, pharmaceutical, food and chemical formulations as an anti-caking agent due to its lubricating and water-repelling properties. Prevents products from absorbing moisture and sticking and increases plasticity.

 

The addition of calcium stearate provides a more homogeneous image to the product it is added to and makes its dosing and transportation easier.

Some examples of our customers:

 

  • Chemistry, powder products
  • Fertilizers
  • Detergents

 

 

  • Papar Industry

 

The paper industry uses calcium stearate as this is a low cost additive which lengthens the life of the paper and gives it a semi-matte appearance.

 

For this application high quality stearate and very special fine grinding is required, or what is even better, the use of our stearate emulsion which guarantees a homogeneous spread of the product and also facilitates its application.

 

 

  • Anti-Foaming Agent

 

It is commonly used in the formulations of different anti-foaming agents.

 

Generally, anti-foaming agents consist of insoluble agents in foam medium. It is important that these anti-foamers have low viscosity and are easily dispersed quickly in the medium.

 

The dose of stearate is usually 0.5% to 1% on top of the solid matter in the dispersal.

 

 

  • Textiles and Footwear

 

Calcium stearate is added to provide impermeability to different fabrics, footwear and even rock wool that is used as an insulator.

 

Another advantage of this additive is its effectiveness as a waterproofing and its low cost.

 

 

  • Lubricant in Extruders

 

To improve productivity in production by extrusion and laminating plastics and metals, calcium stearate is added. This acts as an additive and a solid lubricant, adding between 0.3 – 1.0% of calcium stearate to the mixture in the feed hopper. It remains stable at high temperatures and improves the following aspects in manufacturing;

 

  • Product homogeneity
  • Hot spots
  • Energy consumption
  • Savings on raw materials

 

 

  • Flame Retardant

 

At a concentration of around 2%, both calcium stearate and zinc stearate are used in the production of flame retardant materials.

This is also the case in the market of sound-proofers and other composite products for construction; false ceilings and panels. Stearates act as stabilizers of the formula and as a lubricant at the time of production / forming.

 

 

Adplast integrates a respective range of Stabilizers and Lubricants for PVC, a line of Calcium Stearates with specific technical characteristics for this and other purposes.

 

 

Contact Us.

 

 

 

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