Process for the preparation of 1-monoalkyl-dimethylsilylpropyne

Details Process for the preparation of 1-monoalkyl-dimethylsilylpropyne Process for the preparation of 1-monoalkyl-dimethylsilylpropyne

1989-09-05

1992-09-22

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526128, 526221, 528 14, C08H 458

Patent

active

051497514

ABSTRACT:
A process for the preparation of 1-monoalkyl (C.sub.1 -C.sub.4)dimethylsilyl-1-propyne polymers which comprises polymerizing a 1-monoalkyl (C.sub.1 -C.sub.4)dimethylsilyl-1-propyne monomer in the presence of a compound of a transition metal and a member selected from .alpha.,.omega.-dihydropolydialkylsiloxanes and polyalkyldihydrosiloxanes in a solvent inert for the polymerization. The polymerization reaction proceeds at low temperatures in an efficient manner. The membrane of the resultant polymer has a high gas transmission and suffers little degradation when placed under severe temperature conditions.

REFERENCES:
patent: 4600484 (1986-07-01), Drahnak
patent: 4755193 (1988-07-01), Higashimura et al.
Macromolecules, vol. 17, No. 2, Feb. 1984, pp. 126-129, American Chemical Society, Washington, U.S.; T. Masuda et al.: "Polymerization of 1-chloro-2-phenylacetylene by MoC15-based catalysts".
Accounts of Chemical Research, vol. 17, 1984, pp. 51-56, American Chemical Society, Washington, U.S.; T. Masuda: "Synthesis of high polymers from substituted acetylenes: exploitation of molybdenum- and tungsten-based catalysts".
"Gas Permeability of Polyacetylenes Carrying Substituents" by Higashimura et al.; Journal of Applied Polymer Science, vol. 30, pp. 1605-1616 (1985).

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