Vinylaromatic polymers having high melt flow

Details Vinylaromatic polymers having high melt flow Vinylaromatic polymers having high melt flow

2005-03-15

2005-03-15

Teskin, Fred (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S153000, C526S160000, C526S170000, C526S905000

Reexamination Certificate

active

06867276

ABSTRACT:
A process for preparing syndiotactic polymers of vinylaromatic monomers having improved melt flowability comprising contacting one or more vinylaromatic monomers with a catalyst system comprising a titanium coordination complex capable of preparing syndiotactic vinylaromatic polymers under addition polymerization conditions in the presence of hydrogen gas at a hydrogen partial pressure from 0.1 to less than 10 kPa.

REFERENCES:
patent: 4990580 (1991-02-01), Ishihara et al.
patent: 5037907 (1991-08-01), Imabayashi et al.
patent: 5064802 (1991-11-01), Stevens et al.
patent: 5153157 (1992-10-01), Hlatky et al.
patent: 5254647 (1993-10-01), Yamamoto et al.
patent: 5296433 (1994-03-01), Siedle et al.
patent: 5451648 (1995-09-01), Ikeuchi et al.
patent: 5468818 (1995-11-01), Newman et al.
patent: 5824753 (1998-10-01), Naganuma et al.
patent: 277003 (1988-08-01), None
patent: 468651 (1992-01-01), None
patent: 520732 (1995-12-01), None
patent: WO 9303250 (1993-02-01), None
J. Am. Chem. Soc. 107, 5016 (1985).
J. Am. Chem. Soc. 104, 373 (1982).
J. Chem. Soc. Chem. Comm 383-384 (1994).
Angew. Chem., Intr. Ed. Engl. 27, 1099 (1988).
Lambert, J. B. et al., Organometallics, 13, 2430-2443 (1994).

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