Patent ID: 11905385
Assignee: ELKEM SILICONES USA CORP.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. A combination for preparation of a silicone rubber syntactic foam, wherein the silicone rubber syntactic foam comprises hollow glass beads D, the combination comprising:
(i) an organopolysiloxane A having at least two alkenyl groups bonded to silicon per molecule, the alkenyl groups each containing from 2 to 14 carbon atoms, wherein the organopolysiloxane A has a viscosity at 25° C. of about 5 mPa·s to about 5,000 mPa·s;
(ii) a silicon compound B comprising:
(a) a silicon chain extender B1 having two telechelic hydrogen atoms bonded to silicon per molecule with no pendent hydrogen atoms bonded to silicon per molecule, wherein the viscosity at 25° C. of the silicon chain extender B1 is between about 5 and about 100 mPa·s; and
(b) a silicon crosslinker B2 having at least three hydrogen atoms bonded to silicon per molecule, wherein the viscosity at 25° C. of the silicon crosslinker B2 is between about 5 and about 2000 mPa·s;

(iii) a hydrosilylation catalyst C;
(iv) optionally at least one cure rate controller G which slows the curing rate of the silicone foam combination; and
(v) optionally at least one additive H, optionally the additive H comprises a pigment, a dye, clays, a surfactant, hydrogenated castor oil, wollastonite, aluminium trihydrate, magnesium hydroxide, halloysite, huntite hydromagnesite, expandable graphite, zinc borate, mica and/or a fumed silica;
wherein the proportions in weight of the organopolysiloxane A (i) and the silicon compound B (ii) are such that the overall molar ratio of the hydrogen atoms bonded to the silicon to the overall alkenyl radicals bonded to the silicon is between about 0.4 to about 1.5; and
wherein, upon inclusion of between about 9% to about 20% by weight of the hollow glass beads D in the combination, the combination has a viscosity at 25° C. between about 500 mPa·s and about 5,000 mPa·s and is capable of filling a battery module casing.