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Emulsion Products

Wax Emulsion

Oil Emulsion

A stable mixture of one or more waxes in water is known as wax emulsion. It is notable that waxes and water are immiscible. Surfactants are material that used by manufacturers of wax emulsion to brought together wax and emulsion to a stable condition.

Wax Definition And Types

Generally, wax is unbranched alkanes that Solid at ambient temperature and have melting point range of 20 to 70 degree Celsius. Further, they are Thermoplastic in nature and insoluble in water. Soluble in ether, benzene, and certain esters. Most of chemicals do not affect wax. Depending on the final application of wax emulsion variety of wax emulsion is available in the market which is made from different raw material which is mainly waxes.

Waxes Can Be Distinguished By Their Origin As Follow:

  • Natural Waxes
  • Mineral Waxes
  • Synthetic Waxes
  • Petroleum Waxes

Carnauba wax, Beeswax, Candelilla wax or Ricebran wax, Paraffin wax, Microcrystalline Montanwax, LDPE and HDPE, Maleic grafted PP and Fischer-Tropsch waxes are example of most used waxes in wax emulsion manufacturing.

Wax Selection

Wax plays important role in wax emulsion. End application of wax emulsion and the coating process also influence selection of the most appropriate wax or combination of them. Melting Point ASTM D87: Provides information on temperature at which most of a given wax changes from a solid to a liquid. It is notable that, melting point of wax must be lower curing temperature when curing is required. This point is very crucial as wax melts in coating process it migrates to surface. As the temperature drops wax starts to re-crystalize and eventually, form a continuous film that encourages blooming. Further, if hard wax or solid wax like paraffin wax is designated then certain particle size and particle size spreading should be picked to allow particles to migrate to the film surface in order to achieve Ball Bearing Mechanism at concentration level. Selecting hard wax or soft wax will influence the final application of wax emulsion. HDPE, paraffin and carnauba waxes are typically used to counteract blocking. Factors affecting blocking include the coating surface-free energy, topography of the coating and the hardness of selected wax used in making wax emulsion. Good slip properties require the slip additive to concentrate at the surface during and immediately after application and curing. This can be explained by the fact that a softer wax would tend to be more easily liquefied, and as a consequence, there remains less of it in a solid state to impart slip. In other words, the harder wax would have a relatively higher proportion of crystals in the solid state to impart slip. Hard waxes resist abrasion better than soft materials. Water resistance, is another significant property achieved with waxes. Usually, paraffin waxes, including scale waxes and/or lower refined paraffin grade containing up to 5 % oil perform very well, mainly on absorbent surfaces.

Wax Emulsion Stability

Stability of wax emulsions or in business terms shelf life of wax emulsion is controlled by many aspects. PH of the emulsion needs to be controlled and must be within one unit of the system to which it is added. Moreover, manufacturers must select surfactants which are compatible with other materials besides matching the emulsion charge with the coating charge enhances stability. In addition, order of component addition in water-based formulations can be a critical factor in maintaining stability. Storage condition is also important. Wax emulsion needs to be stored at room temperature.

Wax Emulsion Emulsifiers

Different type of emulsifiers or combination of them is used to emulsify waxes. These can be anionic, cationic or non-ionic in nature. Fatty alcohol ethoxylates are the most common emulsifiers used worldwide due to the fantastic characteristic and stability against hard water, pH-shock and electrolytes. However, it is notable final application of wax emulsion affect the selection of emulsifiers. Table below outlines some of the final application of wax emulsion and as a result selection of emulsifiers.

   Compatible with ionic Good wetting and emulsifying properties
   Impart good freeze-thaw stability Compatible with nonionic
   Less deleterious to mechanical properties    (i.e., better emulsion stability) Best performance in alkaline systems
   Perform well over a large pH range Lower water-sensitivity
   Less foaming than anionic Very effective in polar media
   Better stability in hard water Good adhesion and anti-corrosion properties
   Less solubility at high temperature (Cloud point) Better interaction with pigments
   Work for all types of emulsions More sensitive to freeze-thaw cycling
   Lower reduction of interfacial tension More foaming than nonionic


Wax Emulsions has vast technical applications in many industries. From these industries printing inks, textiles, paper, wood, metal, polishes are the most important ones. Depending on the nature of wax used in making wax emulsions final application is introduced. Further, advancing properties like matting & gloss, hydrophobicity, soft touch, abrasion & rub resistance, scratch resistance, release, corrosion protection and anti-blocking must be achieved by addition of wax emulsion. If manufacturers use natural waxes the best application is for coating fruits and candies and crop protection. Moreover, in pharmaceutical and medical industries wax emulsion Wax emulsions based on Beeswax, Carnauba wax and Paraffin wax are used in creams and ointments. Depending on the properties of wax used as base in wax emulsions like melting point has led to the use of wax emulsions in applications such as paper coatings, paint and ink additives, and even wet sizing for pulp and paper applications. It is notable wax emulsions can be formulated to deliver required properties in final application but manufacturers do have choice to use natural waxes to make green products or use petroleum based waxes.

Wax Emulsion Packing

Wax Emulsion can be packed in a variety of formats. These include: bulk liquid (via tank truck or railcar) and/or brand new drums.

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