Syndiotactic styrene polymers

Details Syndiotactic styrene polymers Syndiotactic styrene polymers

1991-04-30

1993-10-12

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526274, 526279, 526286, 526293, 526334, 526346, 5263471, 5263472, C08F 1208, C08F21208

Patent

active

052526933

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 a organoaluminum compound and a condensing agent such as water.

REFERENCES:
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patent: 4680353 (1987-07-01), Ishihara et al.
patent: 4808680 (1989-02-01), Schmidt et al.
Grassi et al, "Selective Synthesis of Syndiotactic Polystyrene," Gazzetta Chimica Italiana, 117, 249-250, 1987.
T. Kawamura, "Stereoregularity of Polystyrene Derivatives 4," Makromol. Chem., 183(7), 1647-1652, 1982.
T. Kawamura, "Stereoregularity of Polystyrene Derivatives 2," Makromol. Chem., 183(1), 143-151, 1982.
T. Kawamura, "Stereoregularity of Polystyrene Derivatives, 3," Makromol. Chem., 183(1), 153-162, 1982.
Kawamura, "Stereoregularity of Polystyrene Derivatives, 1", Makromol. Chem., 183(1), 125-141, 1982.
Braun et al., "The Tacticity of Poly-.alpha.-Methylstyrenes . . . ", Berichte der Bunsengesellschaft, 68(10), 959-64 (1964).

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