Engine Mount - NR

The engine mount formulation contains a cure package tending to an SEV system this will provide a greater degree of reversion resistance compared to a CV cure system. 

The cure data show that Perkalink 900 does not affect scorch time or time to optimum cure, this is illustrated in Table 53. Tensile data following 

Tensile strength tests on engine mount compounds 

Goodrich Flexometer heat build up at 100 °C after 30 minutes - tests on engine mount compounds (Load 108 N, Stroke 4.45 mm, Frequency 30 Hz) 

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The essential performance properties for an engine mount are low heat buildup and low dynamic compression set. These have been determined for a typical engine mount compound based on NR, with and without Perkalink 900—Table 14.50. 

Natural rubber (NR) Building tack, resilience. Reversion at high Tires, engine mounts... 

Natural rubber has been used for many years in engine mounts, but there have been some failures in recent years as the underhood temperatures of certain car models have risen. Previous work has shown that brominated isobutylene-p-methylstyrene rubber, when blended at concentrations of20-30phr with NR, result in compounds with favourably low spring rates and significantly improved hot air ageing performance. This article presents some dynamic property data for rubber compounds of... 

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