Patent ID: 7416707

Claim:
A polymerization reaction apparatus used for producing a polymer by photo-polymerizing at least one polymerization precursor by irradiation with an active energy ray in a supercritical fluid or subcritical fluid, wherein the apparatus has a reaction vessel allowing photo-polymerization of said polymerization precursor and capable of maintaining a fluid under supercritical condition or under subcritical condition, an active energy ray irradiation means of irradiating the inside of said reaction vessel with said active energy ray, a fluid feeding means of feeding said fluid into said reaction vessel, and a fluid discharging means of discharging said fluid in said reaction vessel, the apparatus is equipped with at least one polymerization precursor storage part for accommodating a polymerization precursor to be polymerized and/or one or more addition components to be contained in the polymer, and said polymerization precursor storage part has a structure capable of feeding a polymerization precursor and/or addition components stored inside to a reaction field, wherein said polymerization precursor storage part is a concave part provided at the bottom of said reaction vessel and an openable and closable lid is provided on said concave part.