| abstract |
The purpose of the present invention is to provide a polyorganosilsesquioxane which is capable of forming a hard coat layer having a high surface hardness by in-mold injection molding, and which forms a tack-free coating film, thereby being suitable as a material for hard coat layers of transfer films that are able to be wound into rolls. The present invention relates to a polyorganosilsesquioxane which is characterized by having a constituent unit represented by formula (1), and which is also characterized in that: the molar ratio of a constituent unit represented by formula (I) to a constituent unit represented by formula (II), namely (constituent unit represented by formula (I))/(constituent unit represented by formula (II)) is from 20 to 500 (inclusive); the proportion of the constituent unit represented by formula (1) and the constituent unit represented by formula (4) relative to the total amount of siloxane constituent units (100 mol%) is 55-100 mol%; the number average molecular weight is from 2,500 to 50,000; and the degree of molecular weight dispersity ((weight average molecular weight)/(number average molecular weight)) is from 1.0 to 4.0. The present invention also relates to a curable composition which contains this polyorganosilsesquioxane. |