Process for producing styrenic polymer

Details Process for producing styrenic polymer Process for producing styrenic polymer

1996-09-10

1998-05-26

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526127, 526151, 526160, 526161, 526164, 526165, 526346, C08F 4646, C08F 1208

Patent

active

057566127

ABSTRACT:
There is disclosed a process for producing a styrenic polymer, especially, syndiotactic polystyrene, which comprises polymerizing a styrenic monomer by the use of (a) a transition metal compound, (b) a coordination complex compound comprising an anion in which a plurality of radicals are bonded to a metal and a cation or methylaluminoxane, (c) an alkylating agent (alkyl group-containing aluminum, magnesium or zinc compound) and (d) a reaction product between a straight-chain alkylaluminum having at least two carbon atoms and water (alkylaluminoxane). The above process is capable of simplifying the production process and producing high-performance styrenic polymer having a high degree of syndiotactic configuration in high catalytic activity without deteriorating the catalyst activity, increasing the amounts of residual metals in the objective polymer or leaving the decomposition products of the alkylaluminum therein, thereby curtailing the production cost of the objective polymer.

REFERENCES:
patent: 4680353 (1987-07-01), Ishihara et al.
patent: 5023304 (1991-06-01), Takeuchi et al.
patent: 5142005 (1992-08-01), Albizzati et al.
patent: 5250629 (1993-10-01), Tani et al.
patent: 5512643 (1996-04-01), Newman et al.
patent: 5596055 (1997-01-01), Aoyama et al.
EPC No. 95104346.2, Filed Mar. 24, 1995, Publication No. 0675139, Oct. 4, 1995 Which is Equivalent to U.S. Parent Application, Serial No. 08/413,224, Filed Mar. 30, 1995.

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