Process for producing syndiotactic styrene copolymer

Details Process for producing syndiotactic styrene copolymer Process for producing syndiotactic styrene copolymer

1991-07-01

1993-02-23

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526165, 526347, 526905, C08F 4642, C08F21204

Patent

active

051891255

ABSTRACT:
Styrene homo-or-co- polymers, the stereoregularity of which is mainly syndiotactic are disclosed, having repeating unit or two or more different repeating units defined by a general formula (I): ##STR1## wherein each R may be the same or different. And a method of preparation of syndiotactic copolymers wherein there are two different repeating units represented by formula (I); wherein the polymerization is carried out with a catalyst comprising (a) a titanium compound and (b) a contact product of an organoaluminum compound and a condensing agent such as water.

REFERENCES:
patent: 3009206 (1961-11-01), Salyer et al.
patent: 3070577 (1962-12-01), Stogryn et al.
patent: 3242099 (1966-03-01), Manyik et al.
patent: 3489737 (1970-01-01), Natta et al.
patent: 4680353 (1987-07-01), Ishihara et al.
Natta et al., "Stereospecific Polymerization . . . of Vinyl Aromatic Monomers", Makromol. Chemie, 28, 253 (1958).
"Isotactic Polymers", G. Natta Makromol. Chem., 16, 213 (1955) and English Translation.

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