Process for polymerizing cyclopentene

Details Process for polymerizing cyclopentene Process for polymerizing cyclopentene

1975-03-24

1977-05-24

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526139, 526143, 526283, 526916, C08F21000, C08F21200

Patent

active

040257088

ABSTRACT:
Cyclopentene homopolymers and copolymers are prepared by polymerizing cyclopentene alone or with one or more copolymerizable cycloolefins in the presence of (1) a catalyst comprising (a) at least one compound selected from the group consisting of dialkylaluminum iodides, alkylaluminum diiodides and mixtures of trialkylaluminum compounds with elemental iodine and (b) at least one solvent-soluble tungsten compound, (2) at least one nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom, and (3) a solvent for the tungsten compound comprising at least one alkyl ester of a saturated carboxylic or dicarboxylic acid. Catalyst component (a) is charged before catalyst component (b). Use of the ester solvent causes a brief induction period allowing excellent process control and resulting in substantially gel-free polymers.

REFERENCES:
patent: 3074918 (1963-01-01), Eleuterio
patent: 3597403 (1971-08-01), Ofstead
patent: 3684781 (1972-08-01), Nutzel et al.
patent: 3687921 (1972-08-01), Oberkirch et al.
patent: 3790543 (1974-02-01), Lehnert et al.
patent: 3790545 (1974-02-01), Minchak
patent: 3853830 (1974-12-01), Minchak
Truett et al., J. Amer. Chem. Soc., 1960, 82, 2337-2340.
Rinehart in "Polymer Chemistry of Synthetic Elastomers"-Part II, Interscience, New York (1969) - pp. 880-882.

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