#$%^&*AU2009200265B220140522.pdf#####ABSTRACT A hydrophilic organopolysiloxane composition of the 5 hydrosilylation reaction cure type for use as dental impression material is characterized by comprising as essential components (A) a diorganopolysiloxane having at least 0.1 silicon-bonded alkenyl group in a molecule, (B) a liquid or solid organopolysiloxane having average 10 compositional formula (1), comprising SiO 2 units and R3SiO1 2 units (R is a monovalent hydrocarbon, alkoxy or hydroxyl group) and having a viscosity of at least 10 mPa-s at 230 C, (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule, (D) a i5 hydrosilylation catalyst, and (E) a polyether having average compositional formula (2).
