高粘度AEM美国杜邦VMX-5000材料/挤出电缆料/乙烯丙烯酸酯弹性体

高粘度 挤出电缆料 乙烯丙烯酸酯弹性体 AEM VMX-5000美国杜邦

VMX-2122 Introduction Vamac? ethylene acrylic elastomer, introduced in 1975, has been successfully used for many

years in demanding automotive applications, where excellent resistance to heat, engine and transmission fluids or

Blow-By is required. DuPont’s latest manufacturing technology allows production of enhanced AEM grades that are

significantly improved compared to the existing standard Vamac? elastomers. These grades, designated and sold as

Vamac? Ultra, provide a true step-change improvement in processability, performance and customer value for

targeted applications. The new manufacturing technology has now also been applied to a new EMA Dipolymer, called

VMX-2122. Major Performance Properties and Applications Higher viscosity is the major difference between the

standard AEM grades and the Vamac? Ultra family of polymers, of which four Terpolymers, cured by Diamine

curatives, have been already commercialized. VMX-2122 is a high viscosity version of Vamac? DP. It provides good

mold release, comparable to Vamac? Ultra Terpolymers. Increased green strength of compounds helps to avoid

collapse during extrusion processes, and may help in applying reinforcement layers without cutting the inner tube

by filaments. The optimized polymer structure ensures gains in physical properties, resulting in improved

performance of rubber parts such as cables, seals, gaskets or extruded hoses. Best physical properties of VMX-2122

are obtained in rubber parts having a hardness range between 50 and 90 Shore A. Handling Precautions Because VMX-

2122 contains small amounts of residual methyl acrylate monomer, adequate ventilation should be provided during

storage and processing to prevent worker exposure to methyl acrylate vapor. Additional information may be found in

DuPont Material Safety Data Sheet (MSDS), and bulletin, Safe Handling and Processing of Vamac? (VME-A10628),

available from DuPont Performance Polymers. Like every other grade of Vamac?, VMX-2122 is halogen-free. Typical

properties of this new experimental polymer are shown in Table 1. Table 1 - Vamac? VMX-2122 - Typical Product

Properties Property Limit Method Form Bale size is nominally: 560 mm by 370 mm by 165 mm (22 in. by 15 in. by 7

in.) Visual Inspection Color Clear Visual Inspection Total Volatile Matter 0.6% DuPont MP 726-1 Polymer

Viscosity ML (1 4), 100°C (MU) 26 ± 8 ASTM D 1646