| abstract |
The invention relates to a silsesquioxane polymer, a composition comprising such a silsesquioxane polymer and an article comprising such a polymer or composition, the composition comprising a silsesquioxane polymer and a free siloxane; the silsesquioxane polymer comprising a three-dimensional network of formula (I), each R1 and R2 being independently (C1-C4) alkyl; each L1 being independently a single bond, alkylene or alkylene bonded to a group selected from oxy, thio, carbonyl, -NH- and combinations thereof; each R3 being independently linear (C14-C100) alkyl; provided that L1 is chosen such that each Si atom is directly bonded to an alkylene or an alkyl; m is an integer of at least 2; n being an integer of at least 1; m + n being an integer of at least 10; each oxygen atom at an asterisk (*) being bound to another Si atom in the three-dimensional network; and the silsesquioxane polymer being a solid at 25 ° C. |