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AssigneeHitachi, Ltd.
InventorsJun NUNOSHIGE, Takahito MURAKI, Hiroyuki KAGAWA
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The present invention provides a method for forming a polymer by using a mixture containing a polymerization initiator which is an adduct of a boron compound and a first unsaturated hydrocarbon compound, and a second unsaturated hydrocarbon compound, generating a radical by oxidization of the polymerization initiator and adding the radical to the second unsaturated hydrocarbon compound, thereby forming the polymer. According to the present invention, excellent controllability of alkylboranes for radical polymerization can be maintained and the structure of a polymerization initiation terminal can be freely selected and controlled. Thus, a terminal-modified polymer having functionality imparted to the terminal group can be prepared. In addition, a polymerization initiator having a plurality of polymerization starting points can be prepared, and polymers with special structures including multibranched polymers, grafted-type (comb-type) polymers and brush-shaped polymers can be prepared.
A polymerization initiator which is a compound prepared by addition reaction of a boron compound and a first unsaturated hydrocarbon compound, and oxidized by addition of oxygen to generate a radical, wherein the radical has a function of reacting with the second unsaturated hydrocarbon to form a polymer.
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The method for forming the polymer according to claim 16, wherein the first unsaturated hydrocarbon compound is acrylamide, N, N-dimethyl acrylamide, 1-vinyl-2-pyrrolidone, 2-vinylpyridine, methacrylic acid, vinyl triethoxysilane, 3-methacryloxypropyl trimethoxysilane, p-styryl trimethoxysilane, tetraallyl silane, pentaerythritol tetraacrylate, divinyl benzene, diallyl isocyanurate, triallyl isocyanurate, triallyl cyanurate, trivinyl cyclohexane, trimethylol propane triacrylate or poly-1,2-butadiene, and the second unsaturated hydrocarbon compound is one or more unsaturated monomers selected from the group consisting of aromatic vinyl compounds, alkyl(meth)acrylates, unsaturated monocarboxylic acid esters, fluoroalkyl(meth)acrylates, siloxanyl compounds, mono(meth)acrylates and di(meth)acrylates, alkoxyalkyl(meth)acrylates, cyanoalkyl(meth)acrylates of alkylene glycols, acryronitrile, methacrylonitrile, oligo(meth)acrylates and hydroxyalkyl(meth)acrylates of polyhydric alcohols, hydroxyalkyl esters of unsaturated carboxylic acids, unsaturated alcohols, monoesters and diesters of unsaturated(mono)carboxylic acids, unsaturated polycarboxylic acids and unsaturated polycarboxylic acid anhydrides, unsaturated polycarboxylic acids and unsaturated polycarboxylic acid anhydrides, epoxy group-containing unsaturated compounds, diene compounds, vinyl chloride, vinyl acetate, sodium isoprene sulfonate, cinnamic acid esters, crotonic acid esters, dicyclopentadienyl, and ethylidene norbornene.
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23-25. (canceled)
Dependencies are inferred from the claim text.