A Guide to Choosing the Right Type of Ethylene Bis-Stearamide

A Guide to Choosing the Right Type of Ethylene Bis-Stearamide

Ethylene bis–stearamide or EBS is an organic compound widely used in industries for its lubricating and binding properties. Commonly used as a release agent, thickener, and anti-blocking agent, EBS is a versatile substance that can also be used for textile and paper production. EBS is a thermoplastic that can be easily molded or extruded and is known for its low toxicity and chemical resistance.

One of the advantages of EBS is that it is available in different types, each with its own properties, advantages, and disadvantages. Hence choosing the right type of EBS is necessary to achieve the desired results. In this guide, we will discuss the different types of EBS and guide you on how to choose the right one.

1. Introduction to Ethylene Bis-Stearamide

Ethylene bis–stearamide is a synthetic wax made of ethylenedicarboxylic acid and stearic acid, and is also known as wax E and N, erucamide, or oleamide. EBS is produced by direct esterification of ethylene diamine with stearic acid followed by treating with a mineral acid and purification. EBS is essentially a long-chain fatty acid with a primary amide group that confers it excellent binding properties.

2. Different Types of Ethylene Bis-Stearamide

There are mainly three types of EBS based on their properties; primary amide, secondary amide, and tertiary amide. Each type has its unique properties, advantages, and limitations.

Primary Amide

Primary amide EBS has a high melting point and low solubility in water, making it suitable for use when high thermal resistance and low water solubility are needed. This type of EBS is commonly used in the production of PVC, masterbatches, and hot melt adhesives. Primary amide EBS is the most widely used type of EBS because it is relatively cheap and has a high affinity for both polar and non-polar substrates.

Secondary Amide

Secondary amide EBS has better solubility in polar solvents, making it useful in some applications where primary amide EBS is not sufficient. This wax is also used as a mold release agent and lubricant in plastic processing and textile production.

Tertiary Amide

Tertiary amide EBS has the best properties in terms of low toxicity, chemical gloss, and dispersion properties, making it suitable for use in food packaging and paper production. This type of EBS is the most expensive of all the EBS types, but its properties make it worth its cost.

3. Factors to Consider When Choosing Ethylene Bis-Stearamide

There are several factors to consider when choosing the right type of EBS for your application.

Temperature

The choice of EBS type depends on the temperature at which it will be used. If you are working at high temperatures, then primary amide EBS is the best option. Primary amide EBS has a higher melting point and thermal resistance than tertiary amide EBS, which makes it ideal for high-temperature applications. However, if you are working at lower temperatures, then tertiary amide EBS will be a better choice.

Substrate

The substrate to which EBS is going to be applied is another crucial factor in determining the type of EBS to use. The nature of the substrate affects the wax's adhesion and flow properties, thus influencing the choice of the EBS type. Primary amide EBS has a high affinity for both polar and non-polar substrates, making it the best option for most applications.

Application Method

The application method plays a significant role in choosing the right type of EBS. Different types of EBS have varying solubility properties, which influence their application method. For instance, if you intend to use a solvent-based application method, then the best EBS type will be secondary amide EBS, which has better solubility in polar solvents.

4. Conclusion

Ethylene bis–stearamide is a versatile substance that is used widely in several applications due to its excellent binding and lubricating properties. However, choosing the right type of EBS can be challenging since there are three main types to choose from. The choice of the EBS type depends on several factors, including application method, temperature, and substrate. In general, primary amide EBS is the most widely used type of EBS because it has a high affinity for both polar and non-polar substrates and is relatively cheap. However, for applications like food packaging and paper production, tertiary amide EBS is an ideal option because of its chemical resistance, low toxicity, and dispersion properties.

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