Viscosity Index Improver Polymer (NORDEL)

NORDEL is a brand name for a group of ethylene-propylene-diene (EPDM) rubber products manufactured by Dow Chemical Company. EPDM is a type of synthetic rubber that is known for its excellent resistance to heat, weather, and ozone. It is often used in various applications, including automotive parts, construction seals, weatherstripping, roofing materials, and more.

In the context of a "Viscosity Index Improver Polymer," it's important to understand the role of viscosity index and viscosity index improvers in lubricating oils.

Viscosity index (VI) is a measure of how an oil's viscosity changes with temperature. Higher viscosity index values indicate that the oil's viscosity changes less with temperature fluctuations, which is desirable for maintaining consistent lubrication performance across a range of operating conditions. In other words, oils with higher VI tend to maintain their thickness and lubricating properties better as temperatures change.

Viscosity index improver polymers (VII) are additives that are used in lubricating oils to enhance their viscosity index. These polymers have a unique property: they expand and become thicker as temperatures rise, counteracting the natural thinning of the oil that occurs as it gets hotter. Conversely, when temperatures drop, these polymers compress and become thinner, compensating for the oil's natural tendency to thicken in colder conditions. This helps to stabilize the oil's viscosity and maintain its lubricating properties over a wider temperature range.

When NORDEL or similar EPDM polymers are used as viscosity index improvers in lubricating oils, they contribute to maintaining a more stable viscosity across different temperatures, thereby enhancing the overall performance of the oil as a lubricant.

It's worth noting that my knowledge is based on information available up until September 2021, and there might have been developments or changes since that time. If you're looking for the most up-to-date information on NORDEL or other related products, I recommend checking with the manufacturer or industry sources.