Thermal Conducting Silicone Polymer Composition

A composition comprising:

• (A) a siloxane polymer, wherein the siloxane polymer (i) is of the formula:
• where R1-R12 are independently chosen from a hydrogen, a C1-C10 monovalent hydrocarbon group optionally containing a hetero atom, a C6-C20 monovalent aromatic group optionally containing a hetero atom, and a C4 to C30 monovalent saturated or unsaturated cycloalkyl group optionally containing a hetero atom, siloxy group containing 1-20 silicone atoms, Z1 or Z2;
• Z1 and Z2 are independently chosen from a hydrogen, C1-C10 hydrocarbon group optionally containing heteroatom, —OH, —NH2, —COOH, or R16-A-R17— where A is chosen from a group comprising a unsaturated cyclic group chosen from a aromatic group, a functionalized aromatic group, a fused aromatic group optionally containing a heteroatom, a unsaturated alicyclic group, a unsaturated heterocyclic group, or a combination of two or more thereof;
• R16 and R17 are independently chosen from a nil, C1-C10 hydrocarbon group optionally containing a hetero atom, a C6-C20 aromatic group optionally containing a hetero atom, and a C4 to C30 saturated or unsaturated cycloalkyl group optionally containing a hetero atom,
• Z3 is chosen from —R19-A-R19— where A is chosen from a group comprising a unsaturated cyclic moiety chosen from an aromatic group, a fused aromatic group, an unsaturated alicyclic group, an unsaturated heterocyclic group, or a combination of two or more thereof;
• and R19 is chosen from a nil, C1-C10 hydrocarbon group optionally containing a hetero atom, a C6-C20 aromatic group optionally containing a hetero atom, and a C4 to C30 saturated or unsaturated cycloalkyl group optionally containing a hetero atom;
• m is 1-100;
• x is 0-200;
• and y is 0-200 wherein x+y≥1;
• and
• (B) (i) a first filler, and (ii) a second filler, where at least one of the first filler and/or the second filler comprises a plurality of filler types differing from one another in terms of particle size and/or morphology.