Characteristics of Neptune Products

Neptune Polyethylene Emulsions are prepared from numerous types of polymer with a wide range of softening points and hardness varying from 0.5 dmm to 12.00dmm. Whilst being of low or intermediate molecular weight, ranging from 1500 to 8000, they have many of the important properties of high molecular weight polythene, in particular, good light and heat stability and almost complete chemical inertness. NEPTUNE uses a high pressure emulsifying system that can produce micro-emulsions of very fine particle size -typically less than 0.25 microns which results in "star bright" emulsions.

EMULSION TYPES

1. Anionic Emulsions

Anionic Emulsions are prepared with emulsifiers that result in surface active ions with a negative charge. The use of high pressure equipment confers useful advantages ensuring that in the case of volatile products there are no losses at high temperatures which can result in varying results and poor stability. Neptune Anionic Polyethylene Emulsions are stable under alkaline and neutral conditions but are not recommended for use under acid conditions. Careful choice of the emulsifier can provide varying degrees of water resistance, gloss and stability.

2. Non Ionic Emulsions

This type of emulsion may be loosely defined as one that does not ionise in water. Due to the wide range of non ionic emulsifiers available and the almost infinite number that can be prepared by the specialist manufacturer, non ionic emulsions with a wide range of properties are available. Particle size can be adjusted over a wide range and resistance to varying pH can be built into the product and, using pressure equipment, emulsions with high solid content can be readily prepared. Neptune Non Ionic Emulsions, the most versatile in the range, are compatible with Anionic, Non Ionic or Cationic systems and are stable over a wide range of pH both acid and alkaline.

3. Mixed Non lonic/Anionic

Where emulsions with exceptional resistance to sustained mechanical shear, high temperature and other adverse conditions are required, emulsions containing proportions of both Non Ionic and Anionic Emulsifying Systems offer very real advantages. In addition, Neptune Chemicals offer an emulsion of this type when very low emulsifier content is required.

4. Cationic Emulsions

A Cationic Emulsifier produces a positively charged surface active ion in solution. Neptune Cationic Polyethylene Emulsions are not stable in alkaline conditions and can only be used in slightly acid or neutral systems. They have important advantages when the ability to exhaust on to anionicly charged surfaces, such as paper, textiles and metals are required. .

Example specifications of a Neptune Emulsion