| 摘要 |
PURPOSE:To prevent the formation of gel and to improve the color tone and tackifying property of a hydrocarbon resin, by using a homogeneous catalyst composed of aluminum halide, etc. in the production of the hydrocarbon resin by the cationic polymerization of a monomer mixture containing conjugated chain diolefin. CONSTITUTION:The objective hydrocarbon resin can be produced by the cationic polymerization of a monomer mixture containing a 4-5C conjugated chain diolefin (e.g. 1,3-pentadiene), using a homogeneous catalyst obtained by compounding (A) an aluminum halide (preferably aluminum chloride), (B) an unsaturated polymer having low molecular weight (preferably a hydrocarbon resin or an oily polymer produced in the production of the hydrocarbon resin), (C) an aromatic hydrocarbon (e.g. benzene) and (D) an oxygen-containing organic compound (e.g. alcohol). The amounts of the components B and C are 0.5-10 pts.(wt.) and 1-10pts. per 1pt. of the component A, and that of the component D is 0.2-0.8mol per 1mol of the component A. USE:Useful as a tackifying agent of a pressure-sensitive adhesive type by mixing with natural rubber or synthetic rubber.
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