Production process for organometallic fine particle and catalyst for polymerization
AssigneeNippon Shokubai Co., Ltd.
InventorsTeruki Matsushita, Hiroya Kobayashi
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Abstract
The present invention provides: a production process for a polyalkylene oxide with fast polymerization reaction rate and good production efficiency; a catalyst for polymerization and a dispersion thereof which are effective for the above production process for a polymer such as polyalkylene oxide; and an organometallic fine particle and a production process therefor, which particle is, for example, useful as the above catalyst for polymerization. In a means therefor, a material such as an aliphatic polyol is reacted upon an organometallic compound in a micelle as the reaction field, thus preparing a hyperfine particle, which is used as a catalyst for polymerization of ionic-polymerizable monomers mainly including a cyclic ether.
Claims11
A production process for an organometallic fine particle, comprising the step of reacting an organometallic compound and a compound (I) in the presence of an ionic surfactant solubilizing agent in a micelle as a reaction field, wherein the compound (I) is at least one member selected from the group consisting of water and active-hydrogen-containing compounds which have one or more carbon atoms, and wherein the organometallic compound is shown by the following general formula (1):
- R.sub.x M (1)
- wherein:
- R is a hydrocarbon group having one or more carbon atoms;
- M is a metal that shows Pauling's electronegativity of 0.5-3.0;
- x is the valence of M.
An organometallic fine particle, comprising a structural unit of the general formula (2) below:
- (--M--O--Y--O--) (2)
- wherein:
- Y is a hydrocarbon group having one or more carbon atoms;
- M is a metal that shows Pauling's electronegativity of 0.5-3.0;
- with the particle being characterized by having a total content of silica, magnesia, and alumina of 2 weight % or less and by displaying a sedimentation velocity of 1 hour or more.
Dependencies are inferred from the claim text.