Thermally conductive phase change materials

A composition comprising:

• A) a matrix comprising an organofunctional silicone wax,
• B) a thermally conductive filler,
• optionally C) a treating agent,
• optionally D) an antioxidant, and
• optionally E) an inhibitor,
• with the provisos that
• the organofunctional silicone wax comprises an uncrosslinked organofunctional silicone wax, a crosslinked organofunctional silicone wax, or a combination thereof;
• where the uncrosslinked organofunctional silicone wax comprises a wax of the formula R2R32SiO(R32SiO)y(R3R1SiO)zSiR32R2, a cyclic wax of the formula (R32SiO)m(R3R1SiO)n, or a combination thereof, where
• each R1 is independently a substituted or unsubstituted monovalent hydrocarbon group of at least about 24 carbon atoms,
• each R2 is independently a substituted or unsubstituted monovalent hydrocarbon group,
• each R3 is independently a substituted or unsubstituted monovalent hydrocarbon group of at least about 1 carbon atom up to about 4 carbon atoms,
• m is greater than or equal to 0,
• n is greater than or equal to about 1,
• with the proviso that m+n is up to about 8,
• y is 0 to about 200, and
• z is about 1 to about 200,
• the crosslinked organofunctional silicone wax comprises a reaction product of
• a) a crosslinking agent comprising an alpha-, omega- diene, an 1-alkenyl-functional organopolysiloxane having at least two 1-alkenyl groups per molecule, or a combination thereof;
• b) an alpha- olefin;
• and
• c) a siloxane having silicon-bonded hydrogen atoms or an organosiloxane having silicon-bonded hydrogen atoms.