SYNTACTIC SILICONE RUBBER FOAM Russian patent published in 2021 - IPC C08L83/04 C08L83/07 C08L83/05 C08K7/22 C08J3/24 C08J9/32 

FIELD: chemistry.

SUBSTANCE: invention relates to organopolysiloxane composition X for obtaining syntactic foam crosslinkable according to addition curing type. Such foam is useful when applied to a battery exhibiting improved thermal management conditions. Organopolysiloxane composition X comprising: a) at least one organopolysiloxane A of the following formula:

,

(A)

in which R and R'' are independently selected from the group consisting of a C₁-C₃₀ hydrocarbon radical, R' is a C₁-C₂₀ alkenyl radical and n is an integer ranging from 5 to 1000, and preferably from 5 to 100, b) a mixture of two silicon-containing compounds B, where one includes two silicon-bonded terminal hydrogen atoms per molecule without side silicon-bonded hydrogen atoms per molecule and the other includes at least three silicon-bonded hydrogen atoms per molecule, with ) an effective amount of a hydrosilylation catalyst C, and preferably a platinum-based hydrosilylation catalyst C, d) hollow glass beads D, and preferably hollow microspheres of borosilicate glass, e) at least one reactive diluent E to reduce the viscosity of the composition, which undergoes the hydrosilylation reaction and is selected from the group consisting of an organic compound containing a single ethylenically unsaturated group, n where the specified organic compound is preferably an organic α-olefin containing from 3 to 20 carbon atoms, and combinations thereof, and all of them have a terminal vinyl group, f) optionally, at least one additive H, such as a pigment, a dye, clays, surfactant, hydrogenated castor oil, wollastonite, aluminum trihydrate, magnesium hydroxide, halloysite, huntite, hydromagnesite, expandable graphite, zinc borate, mica or fumed silica, and g) optionally at least one cure rate regulator G, which reduces the cure rate. Also described are syntactic foam made of silicone rubber obtained from organopolysiloxane composition X, methods for preparing organopolysiloxane composition X.

EFFECT: providing syntactic foam that can be used in a battery to minimize hazards to personnel and property caused by uncontrolled thermal fluctuations, provide effective low temperature insulation performance, and provide damping control to minimize transmission vibration.

19 cl, 3 tbl, 2 dwg, 1 ex