SECONDARY BATTERY PACK WITH IMPROVED THERMAL MANAGEMENT

The present invention relates to an addition curing type organopolysiloxane composition for preparation of a silicone rubber syntactic foam, which composition comprises a) at least one organopolysiloxane having at least two alkenyl groups bonded to silicon per molecule, said alkenyl groups each containing from 2 to 14 carbon atoms, b) a silicon compound comprising at least two hydrogen atoms bonded to silicon per molecule, said compound comprising a mixture of (i) a silicon chain extender comprising two telechelic hydrogen atoms bonded to silicon per molecule with no pendent hydrogen atoms bonded to silicon per molecule, and (ii) a silicon crosslinker comprising at least three hydrogen atoms bonded to silicon per molecule, c) a hydrosilylation catalyst, d) hollow glass beads, e) optionally at least one reactive diluent which reacts through hydrosilylation reaction, f) optionally at least one cure rate controller which slows the curing rate of the silicone composition, andg) optionally at least one additive.