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US 11,472,925 B2Granted
Silicone polymer
AssigneeMomentive Performance Materials Inc.
InventorsPranabesh Dutta, Vinu Krishnan Appukuttan, Sandeep Naik, Anubhav Saxena
Life of this patent
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Abstract
Provided is a polymer of the formula: and compositions comprising the same. The polymers comprise a cyclic unsaturated group (Z3) within the siloxane polymer backbone. The polymers have been found to exhibit good thermal conductivity and may find utility in a variety of applications.
Claims9
A polymer 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, and a C4 to C30 monovalent saturated or unsaturated cycloalkyl group optionally containing a hetero atom, siloxy group containing 1-20 silicon atoms, —OH, —NH2, or —COOH;
- Z1 and Z2 are independently chosen from a C1-C10 hydrocarbon group optionally containing heteroatom, —OH, —NH2, —COOH, or R16-A-R17— where A is chosen from a group comprising of a unsaturated cyclic group chosen from an 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, a C6-C20 aromatic group and a C4 to C30 saturated or unsaturated cycloalkyl group, wherein when one of Z1 or Z2 is R16-A-R17- then both Z1 and Z2 will not be R16-A-R17—;
- Z3 is chosen from —R19-A-R19— where A is chosen from
- and R19 is chosen from a C2-C10 hydrocarbon group, a C6-C20 aromatic group, and a C4 to C30 saturated or unsaturated cycloalkyl group;
- and
- m is 1-100;
- x is 0-200;
- and y is 0-200, wherein x+y≥1;
- wherein the polymer is thermally conductive.
7 more elements
Dependencies are inferred from the claim text.