Patent ID: 8293810
Filing Date: 2012-10-23
Classification: B33Y,C08F,C08L

Abstract:
1. A resin composition for forming a three-dimensional object by a stereolithography technique comprising steps of selectively irradiating an ultraviolet laser beam to the surface of liquid photo-curable resin contained in a vat under the control of a computer to harden the photo-curable resin so that a photo-cured resin layer having a predetermined thickness is obtained, then supplying a layer of liquid photo-curable resin onto the cured resin layer and then likewise irradiating an ultraviolet laser beam to the liquid photo-curable resin layer to form a cured resin layer contiguous to the previous cured resin layer, and repeating said steps until a desired three-dimensional object is obtained, said resin composition comprising: (I) an actinic energy radiation-curable silicone composition, (II) an actinic energy radiation-sensitive polymerization initiator, and (III) an actinic energy radiation absorber, the actinic energy radiation-curable silicone composition (I) comprising (A) an alkenyl-containing organopolysiloxane having the general formula (1): wherein R (B) a mercapto-containing organopolysiloxane having the general formula (2) or (3): wherein R (C) an alkenyl-containing MQ resin comprising R the actinic energy radiation-sensitive polymerization initiator (II) being an actinic energy radiation-sensitive radical polymerization initiator selected from the group consisting of acetophenone compounds, and being present in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the actinic energy radiation-curable silicone composition (I), and the actinic energy radiation absorber (III) being selected from the group consisting of benzotriazole compounds of formula (I): wherein R benzophenone compounds of formula (II): wherein R being present in an amount of 0.005 to 0.25 part by weight per 100 parts by weight of the actinic energy radiation-curable silicone composition (I).