Process for substantially gel-free polymerization of norbornene

Details Process for substantially gel-free polymerization of norbornene Process for substantially gel-free polymerization of norbornene

1975-04-17

1978-01-17

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526153, 526280, 526283, C08F 444, C08F 3208, C08F23208, C08F23600

Patent

active

040693767

ABSTRACT:
A norbornene-type monomer is copolymerized with about 0% to about 95% by weight of dicyclopentadiene, based upon total polymer weight. The polymerization is conducted in the presence of (1) a catalyst comprising (a) at least one compound selected from the group consisting of dialkyl-aluminum iodides, alkylaluminum diodides and mixtures of trialkylaluminum compounds with iodine, (b) at least one dialkylaluminum chloride or alkylaluminum dichloride and (c) at least one monomer- or solvent-soluble tungsten compound, and (2) at least one nonconjugated acyclic olefin having at least one hydrogen on each double-bonded carbon atom. Catalyst components (a) and (b) are charged before catalyst component (c). Use of a catalyst containing components (a), (b) and (c) produces easy-processing and substantially gel-free polymers, whereas a catalyst containing only (a) and (c) or only (b) and (c) produces heavily gelled polymers.

REFERENCES:
patent: 3467633 (1969-09-01), Harris et al.
patent: 3577400 (1971-05-01), Judy
patent: 3597403 (1971-08-01), Ofstead
patent: 3684781 (1972-08-01), Nutzel
patent: 3687921 (1972-08-01), Oberkirch et al.
patent: 3778420 (1973-12-01), Brown et al.
patent: 3790545 (1974-02-01), Minchak
patent: 3816382 (1974-06-01), Streck et al.
patent: 3836593 (1974-09-01), Streck et al.

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