| abstract |
(57) [Abstract] [Purpose] A method for easily and inexpensively obtaining a polymer having hydroxyl groups at both ends from a wide range of vinyl-based monomers, a composition containing the polymer and its use, and Provide polymers derived from the compositions and their uses. [Structure] In the presence of the compound (a) represented by the general formula: HO-A- (S) x-B-OH, the vinyl-based monomer (b) is used. Is carried out using a radical polymerization initiator (c), in which case the compound (a) is added in the reactor substantially without the use of anything other than (a), (b) and (c). A polymer having a hydroxyl group at both ends is obtained by always present in an amount of 50 mol times or more of the initiator (c) during the reaction, and a composition containing this polymer is used, or a polymer derived from this composition is used. Use it or not. |