Catalyst and process for the preparation of tri-substituted sily

Details Catalyst and process for the preparation of tri-substituted sily Catalyst and process for the preparation of tri-substituted sily

1988-04-29

1989-05-30

Garvin, Patrick P.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502167, 526279, C08F 420, C08F 422

Patent

active

048352292

ABSTRACT:
Polymeric tri-substituted silylalkynes useful for forming gas separation membranes are prepared at accelerated polymerization rates and increased molecular weights by employing at polymerization temperatures a binary catalyst system of Group VB or VIB metal halide such as TaCl.sub.5 and a tertiary amine compound such as pyridine in an aromatic solvent.

REFERENCES:
patent: 3852235 (1974-12-01), Krutchen
patent: 4607088 (1986-08-01), Nomura et al.
patent: 4657564 (1987-04-01), Langsam
patent: 4778868 (1988-10-01), Higashimura et al.
T. Masuda et al., "Polymerization of 1-(Trimethylsilyl)-1-propyne by Halides of Niobium(V) and Tantalum(V) and Polymer Properties", Macromolecules 1985, 18, 841-845.
T. Masuda et al., "Polymerization of Methylpentynes by Transition Metal Catalysts: Monomer Structure, Reactivity, and Polymer Properties", Polymer Journal, vol. 14, No. 5, pp. 371-377 (1982).
T. Masuda et al., "Synthesis of High Polymers from Substituted Acetylenes: Exploitation of Molybdenum- and Tungsten-Based Catalysts", Acc. Chem. Res., vol. 17, pp. 51-56 (1984).

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