Process for the polymerization tri-substituted silylalkynes

Details Process for the polymerization tri-substituted silylalkynes Process for the polymerization tri-substituted silylalkynes

1988-05-27

1990-02-20

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526279, 526 90, C08L23800

Patent

active

049027638

ABSTRACT:
Polymeric trisubstituted silylalkynes useful for forming gas separation membranes are prepared at accelerated polymerization rates and with improved yields in the presence of a Group VV or VIB Metal halide catalyst such as TaCl.sub.5, by employing about 0.1 to 5 mole %, based upon total alkyne concentration, of a trialkylgermylalkyne compound.

REFERENCES:
patent: 4657564 (1987-04-01), Langsam
patent: 4759776 (1988-07-01), Langsam et al.
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).
T. Masuda et al., "Polymerization of 1-(Trimethylsilyl)-1-Propyne by Halides of Niobium(V) and Tantalum(V) and Polymer Properties", Macromolecules, vol. 18, No. 5, pp. 841-845 (1985).
T. Masuda et al., "Polymerization of Methylpentynes by Transition Metal Catalysts: Monomer Structure, Reactivity, and Polymer Properties", Polymer Journal, vol. 4, No. 5, pp. 371-377 (1982).

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