Patent ID: 11370869

Abstract:
According to the present invention, an ultraviolet curable silicone composition for stereolithography, which contains(A) an organopolysiloxane that has two groups represented by formula (1) (wherein each R1 independently represents a monovalent hydrocarbon group having 1-20 carbon atoms; R2 represents an oxygen atom or the like; R3 represents an acryloyloxyalkyl group or the like; p represents a number satisfying 0≤p≤10; and a represents a number satisfying 1≤a≤3) in each molecule,  (B) an organopolysiloxane resin that is composed of (a) a unit represented by formula (2)  (wherein R1-R3, a and p are as defined above), (b) an R43SiO1/2 unit (wherein each R4 independently represents a monovalent hydrocarbon group having 1-10 carbon atoms) and (c) an SiO4/2 unit, and wherein the molar ratio of the total of the unit (a) and the unit (b) to the unit (c) is within the range of 0.6-1.2:1 and  (C) a photopolymerization initiator has a viscosity that is applicable to a stereolithography system such as lifting system and forms a cured product which has excellent physical properties of rubber.