Polyacylic Rubber(ACM)

Polyacrylic elastomers, also called ACM rubbers, are synthetic rubbers composed of acrylic monomers. These polymers are usually prepared by emulsion or suspension polymerization. The main repeat units are ethyl and butyl acrylate or a blend of both. Many other monomers can be included which allows for a wide variation of the thermophysical and mechanical properties. Very common is the addition of 5 percent 2-chloroethyl vinyl ether.

Properties

Excellent weather resistance

Excellent mineral oil resistance

Excellent thermal stability

Poor resistance to aromatic oils

Poor cold resistance

Low strength itself, good mechanical properties after reinforcement

Application

ACMelastomersareprimarilyusedwherecombinedresistancetoheatandoilsisrequired.They areoftenagoodalternativetomoreexpensiveheatresistantelastomerssuchasfluorocarbon polymers(FKM),silicones(VMQ)andfluorosilicones(FVMQ)forelevatedtemperature applications(<150°C).

Typicalapplicationsincludeautomotivetransmissioncomponentslikesealsandhosesthathaveto beresistanttohotoil,fuelandmanyothercommonautomotivelubricantsandhydraulicfluids. ACMelastomerhavealsofounduseinvibrationdampingduetoitsexcellentresilience.Other applicationsincludetextiles,adhesives,andcoatings.