Patent ID: 8653176
Filing Date: 2014-02-18
Classification: C08C,C08F,C08K,C08L,F28F,H01L

Abstract:
1. A thermally conductive material comprising: a hydrogenated copolymer (1) satisfying the following conditions (a) to (d) which is produced by hydrogenating a copolymer of a conjugated diene and a vinyl aromatic; and/or a modified hydrogenated copolymer (2) having at least one functional group and satisfying the following conditions (a) to (d), which is produced by hydrogenating a copolymer of a conjugated diene and a vinyl aromatic; a zinc oxide (3) comprising a core part and acicular crystal parts extending from the core in four different axial directions; and a paraffin oil (4), wherein the thermally conductive material does not comprise a flame retardant (5), and satisfies the following conditions (A) to (C): (a) the content of a vinyl aromatic unit is greater than 45 mass % and 90 mass % or less, (b) the content of a vinyl aromatic polymer block is 40 mass % or less, (c) the weight-average molecular weight is 5×10 (d) the degree of hydrogenation of double bonds based on the conjugated diene is 10% or more, and based on 100 mass % of the thermally conductive material, (A) the total content of the hydrogenated copolymer (1), the modified hydrogenated copolymer (2), and the paraffin oil (4), [(1)+(2)+(4)], is 10 mass % or more and 24 mass % or less, (B) the content of the zinc oxide (3) is 76 mass % or more and 90 mass % or less, and (C) the ratio of a mass of the paraffin oil (4) to the total mass of the hydrogenated copolymer (1) and the modified hydrogenated copolymer (2), [(4)/{(1)+(2)}], is greater than 0 and 2 or less.