KNOWLEDGE TANK

Welcome to our archive of technical articles. If you are interested in learning and enjoy reading lengthy technical articles – packed with information that only you and a few others understand – you will love this part of the website.

Is knowing the pour point enough?

Poor points for pour points? Well, not quite, but a Nynas study shows that pour points should be viewed with scepticism when picking a lubricant for cold climates.

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Connecting the dots

Pär Wedin at Nynas proposes a shift from one point to another one, from aniline point to turbidity point. Now, standardisation bodies SIS and ISO are mulling over his proposal.

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The brains of Nynas: Mehdi Fathi-Najafi

Having left his native country Iran in 1979 to study in Sweden, Mehdi Fathi-Najafi first gained a degree in Chemical Engineering followed by a Licentiate in Engineering at Chalmers University of Technology in Gothenburg. He then worked in the grease industry before joining Nynas in 2008. The company’s Grease Lab is his brainchild. Find out what is on Mehdi's mind.

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New naphthenic oil gives grease a competitive edge

With a viscosity of 150 cSt, the BT 150 from Nynas' Harburg refinery is an excellent choice for grease manufacturers. Offering an alternative to, for instance, the 750SUS oil used in the US grease market, this new naphthenic oil promises to save money and improve performance.

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Bright future for black grease

In a comparative study, Nynas researchers conclude that a heavy specialty oil is a viable alternative to bright stock in grease formulations. It is cost-effective and offers equivalent or better performance. The one drawback: it only comes in black.

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Sulphur in metal working no problem with naphthenic oils

An important choice in metalworking is high or low sulphur content. But with naphthenic base oils, you can choose freely which sulphur content you wish, dependent on the application.

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Finding the right emulsifier

Emulsions are used in metal working when cooling and lubrication are called for. The following review of factors governing the choice of emulsifier will, hopefully, guide you through the jungle of different types.

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Complex interaction between rubber and lubricants

Rubber and lubricants need to come into contact with each other in many applications. But there are often problems with what is known as rubber "ageing": a deterioration of the properties of the rubber due to interactions between the rubber and the grease or base oils involved.

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Naphthenic oils advantageous in grease making

In the manufacture of grease, naphthenic base oils in most cases have great advantages compared with paraffinic oils. This is a generally recognised fact in many parts of the world. The basis for these advantages lies in the favourable solubility properties of naphthenic oils.

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Grease lubrication - New research findings

Our knowledge of what actually happens when grease lubrication is used has increased dramatically in the last ten years. The latest research gives a new view on how to formulate grease to optimise its effect under different conditions, not least when it comes to adapting the grease to the temperature a machine operates at.

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Naphthenic oil best for metalworking

Naphthenic base oils have long held a strong position in the metalworking fluids market – its better solubility and the ability to form stable emulsions give clear advantages over paraffinic base oils. The development of new additives for paraffinic oils has shortened Naphthenic's lead, however. Valentina Serra-Holm of Nynas R&D has conducted comparative studies to discover whether paraffin base oils have actually caught up. The answer is an emphatic no.

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Naphthenic oils are ideal for rust preventive agents

Corrosion costs billions every year which means that effective rust preventive agents are of great economic importance. Choosing the right oil is critical to the efficiency of a rust inhibitor. Research has shown that naphthenic oils are ideal for temporary rust preventive agents.

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