| 摘要 |
PROBLEM TO BE SOLVED: To provide: a negative-ionically charged fine powder comprising a perfluoroalkyl group-containing organic silicon compound treatment inorganic fine powder; an addition-curable silicone composition including the negative-ionically charged fine powder, and being excellent in transparence; and a light-emitting semiconductor device sealed with the cured silicone composition.SOLUTION: A negative-ionically charged inorganic fine powder is characterized in that 1-60 pts.mass of a perfluoroalkyl group-containing organic silicon compound represented by following general formula (1) is subjected to an addition treatment on a surface of a particle of the inorganic fine powder based on 100 pts.mass of the inorganic fine powder to be grafted, so that the inorganic fine powder is dispersed by repulsion effect among the negative-ionically charged powder particles. In the formula (1), Ris a 1-4C monovalent hydrocarbon group, Ris a 1-4C alkoxy group or an acyloxy group, Q is a 2-10C bivalent organic group, "a" is 0 or 1, and p is an integer of 1-20. |
