Process for the preparation of crystalline vinylaromatic polymer

Details Process for the preparation of crystalline vinylaromatic polymer Process for the preparation of crystalline vinylaromatic polymer

1997-02-24

1998-02-24

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526134, 526153, 526160, 526170, 526346, 5263472, 526943, 556 52, 502103, 502132, 502152, 502153, 502154, C08F 4643, C07F 700

Patent

active

057213275

ABSTRACT:
Process for the preparation of crystalline vinylaromatic polymers with a predominant syndiotactic structure which involves polymerizing vinylaromatic monomers in the presence of a catalytic system comprising: a titanium complex having general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, the same or different, represent a hydrogen atom or a C.sub.1 -C.sub.20 alkyl radical or a C.sub.6 -C.sub.20 arylalkyl or aryl radical, on the condition that at least one of these is different from hydrogen.

REFERENCES:
patent: 5196490 (1993-03-01), Campbell, Jr. et al.
patent: 5596054 (1997-01-01), Takeuchi
Roberts et al, Basic Principles of Organic Chemistry, W.A. Benjamin, Inc., 1965, p. 945.

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