| 摘要 |
PURPOSE: Provided is a novel copolymer which has high adhesion and is suitable as polymer for coating film having durability against pattern collapse in the finer pattern formation and a method for producing the copolymer, as well as a novel thiol compound useful as a chain transfer agent in the production of the copolymers. CONSTITUTION: The thiol compound has the structure represented by the following formula, wherein R¬1 is a bivalent substituent selected from linear, branched or cyclic saturated hydrocarbon having 1 to 15 carbon atoms. The copolymer is obtained by using a thiol compound represented by the following formula, wherein R¬1 is a bivalent substituent selected from linear, branched or cyclic saturated hydrocarbon having 1 to 15 carbon atoms, as a chain transfer agent in polymerization of two or more polymerizable compounds having an ethylenic double bond. The method for producing a copolymer comprises the step of radical copolymerization of two or more polymerizable compounds having an ethylenic double bond by using a thiol compound represented by the following formula, wherein R¬1 is a bivalent substituent selected from linear, branched or cyclic saturated hydrocarbon having 1 to 15 carbon atom, as a chain transfer agent.
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