Process for production of styrene polymers

Details Process for production of styrene polymers Process for production of styrene polymers

1986-10-23

1987-07-14

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526138, 526159, C08F 464

Patent

active

046803530

ABSTRACT:
A process for production of styrene polymers of high syndiotactic configuration is disclosed, comprising polymerizing styrene or styrene derivatives by the use of a catalyst comprising: (A) a titanium compound, e.g., at least one compound selected from those represented by the formulae: TiR.sup.1.sub.a R.sup.2.sub.b R.sup.3.sub.c X.sup.1.sub.4 -(a+b+c) and TiR.sup.1.sub.d R.sup.2.sub.e X.sup.1.sub.3-(d+e) (all the symbols are as defined in the appended claims); and (B) a contact product of an organoaluminum compound and a condensation agent, e.g., a product resulting from modification of trimethylaluminum with water. Because of such high syndiotactic configuration, the styrene polymers are greater in thermal resistance and solvent resistance than conventional atactic polystyrene.

REFERENCES:
patent: 3014887 (1961-12-01), Haward
patent: 3049524 (1962-08-01), Voltz
patent: 3069407 (1962-12-01), Tsou et al.
patent: 3161624 (1964-12-01), Natta et al.
patent: 3414553 (1968-12-01), Kern
patent: 3489737 (1970-01-01), Natta et al.
patent: 3639332 (1972-01-01), Coover et al.
patent: 4246134 (1981-01-01), Uvarov et al.

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