The first types of ployacrylate and polyacrylic rubbers were proposed as oxidation-resistant elastomeric materials. Chemically, they were polyethyl acrylate, and a copolymer of ethyl acrylate and 2-chloro ethyl vinyl ether. Polyacrylate also known as Acrylate polymers, belong to a group of polymers often referred to generally as plastics. Polyacrylates are especially noted for transparency, resistance to breakage, and elasticity.
The development of polyacrylic rubbers was accelerated by the interest expressed throughout the automotive industry. Mostly because of the potential applications of this type of polymer in special types of seals. An effective seal for today’s modern lubricants must be resistant not only to the action of the lubricant but to increasingly severe temperature conditions. Furthermore resistance to attack of highly active chemical additives incorporated in the lubricant to protect it from deterioration at extreme temperature is a must.
Acrylic elastomer is a general term for a type of synthetic rubber whose main component is acrylic acid alkyl ester (ethyl or butyl ester).
Major characteristics of acrylic rubber include good heat resistance and oil resistance. It can endure a temperature of 170 ~ 180 ℃ under dry heat or in oil. Since it does not have a double bond, acrylic rubber also boasts of good weatherability and ozone resistance.
However, While resistance to hot air aging is superior to Nitrile, Polyacrylate strength, compression set, water resistance properties and low temperature capabilities are inferior to many other polymers. Not generally recommended for exposure to alcohol, glycols, alkalis and brake fluids. Nor to chlorinated or aromatic hydrocarbons.
The main use for Polyacrylate is Oil Seals.
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