| abstract |
The present invention provides a curable resin composition which is capable of forming a cured product having a low refractive index, high transparency, and further excellent heat resistance. The curable resin composition of the present invention is characterized in that it comprises an organic cerium compound (A) and a fluoropolymer (B), and the fluoropolymer (B) has the following formula (L). The structural unit: □ (wherein X1 and X2 are H or F which are the same or different; X3 is H, F, CH3 or CF3; X4 and X5 are H, F or CF3 which are the same or different; Rf is a fluorine-containing hydrocarbon group having 1 to 40 carbon atoms having a guanamine bond or a urea bond, or a fluorine-containing hydrocarbon having 2 to 100 carbon atoms which may have a guanamine bond, a carbonate bond, a urethane bond or a urea bond a hydrocarbon group, and an organic group in which 1 to 3 hydrogen atoms are substituted by Y (Y is a monovalent organic group having at least one hydrolyzable metal alkoxide moiety having 1 to 30 carbon atoms at the terminal, or an ethylenic carbon-carbon at the terminal) The carbon number of the double bond is 2 to 10% of the organic group); a is an integer of 0 to 3; and b and c are the same or differently 0 or 1). |