Process for producing a styrenic polymer

Details Process for producing a styrenic polymer Process for producing a styrenic polymer

1995-05-12

1996-08-06

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526133, 526134, 526135, 526140, 526142, 526146, 526160, 526170, 526346, C08F 4649, C08F 1208

Patent

active

055434819

ABSTRACT:
There are disclosed a catalyst which comprises (A) a titanium compound having one .pi. electron-based ligand (e.g. pentamethylcyclopentadienyl group) or two same .pi. electron-based lignads and (B) an ionic compound comprising a non-coordinate anion and a cation of an element typifying the group 4 elements of the Periodic Table (e.g. triphenylcarbonium tetra(pentafluorophenyl)borate; a catalyst comprising (C) an alkylating agent (e.g. triisobutylaluminum) in addition to the components (A) and (B); and a process for producing a styrenic polymer by the use of any of the aforesaid catalysts. By using the aforementioned catalyst and process, a highly syndiotactic styrenic polymer can be efficiently produced.

REFERENCES:
patent: 5066741 (1991-11-01), Campbell, Jr.
patent: 5132380 (1992-07-01), Stevens et al.
patent: 5155080 (1992-10-01), Elder et al.
patent: 5272229 (1993-12-01), Tomotsu et al.

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