Process for production of styrene-based polymers
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasahiko Kuramoto, Hiroshi Maezawa, Hiroshi Hayashi
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Abstract
A process for producing a styrene-based polymer, particularly a styrene-based polymer having mainly a syndiotactic structure by polymerizing a styrene-based monomer in the presence of a filler by using a catalyst containing (A) a titanium compound and (B) aluminoxane as main components. The filler acts as a catalyst carrier, increasing catalyst activity, and thus de-ashing treatment is not needed. When the filler is used in a large amount, there is obtained a composition in which the filler is uniformly dispersed in the styrene-based polymer. The styrene-based polymer or styrene-based polymer-containing composition is excellent in heat resistance and chemical resistance.
Claims8
In a process for producing a styrene-based polymer having mainly a syndiotactic structure, the improvement comprises polymerizing a styrene-based monomer in the presence of 0.1 to 85% by weight, based on total product weight, of filler selected from the group consisting of silica, alumina, silica alumina, quick lime, magnesia, titania, triirontetraoxide, zirconia, and calcium carbonate by the use of a catalyst containing (A) a titanium compound and (B) aluminoxane as main components.
Dependencies are inferred from the claim text.