| abstract |
An object of the present invention is a novel polyorganosiloxane having a specific structure, excellent curability, and a cured product having high workability upon curing, excellent UV permeability and heat resistance, and improved cracking caused by toughness and cold cycles. It is providing the curable composition which can be obtained. The polyorganosiloxane of this invention is obtained by hydrolytically condensing the organosilicon containing compound represented by the said Formula (1) in presence of the organic polyol compound which has two or more hydroxyl groups, and has an oxetanyl group.n n n <Formula 1>n n n n n n n n n Polyorganosiloxane, curable composition, organic polyol compound, cold cycle |