REMOVAL OF THIOCARBONYL END GROUPS OF POLYMERS
    3.
    发明公开
    REMOVAL OF THIOCARBONYL END GROUPS OF POLYMERS 审中-公开
    去除聚合物THIOCARBONYLENDGRUPPEN的

    公开(公告)号:EP1608689A1

    公开(公告)日:2005-12-28

    申请号:EP04758719.1

    申请日:2004-04-02

    IPC分类号: C08F2/38 C08F293/00 C08F8/00

    摘要: This invention provides a method for removing unwanted groups from a chain end of a polymer and replacing them with a more desirable group. In one aspect, the invention provides a method of free radical polymerization. The method includes forming a mixture of one or more monomers, at least one free radical source and a chain transfer agent, wherein the chain transfer agent includes a thiocarbonylthio group, and subjecting the mixture to polymerization conditions. The resulting polymer, which has one or more thiocarbonylthio end groups, is then contacted with a free radical source and optionally an addition fragmentation agent or a monomer with little or no homopolymerizability under cleavage reaction conditions. The free radical source is activated to generate radicals, and at least 50% of the thio end groups of the polymer are replaced with a group of interest other than hydrogen.