Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1988-01-19
1989-02-28
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526279, 526285, C08F 462, C08F 3008
Patent
active
048086797
ABSTRACT:
The present invention is a process for polymerizing trialkylsilylacetylene derived monomers to form the corresponding poly(trialkylsilylacetylene) polymer. The polymerization reaction is carried out in the presence of an organic solvent over a catalyst comprising a halide of a transition metal of group Vb or VIb. The molecular weight of the resultant polymer is decreased by adding to the reaction mixture, in a concentration between about 0.5-25 wt. %, a compound having the structural formula ##STR1## wherein each R is independently methyl, C.sub.2-4 alkyl or phenyl, and n is from 1 to 100.
REFERENCES:
patent: 4567245 (1986-01-01), Takamizawa et al.
patent: 4657564 (1987-04-01), Songsam
Masuda et al., Macromolecules 1985, 18, 841-845.
T. Masuda et al., "Polymerization of 1-(trimethylsilyl)-1-Propyne by Halides of Niobium (V) and Tantalum (V) and Polymer Properties", Macromolecules 1985, 18, pp. 841-845.
T. Masuda et al., "Synthesis of High Polymers from Disubstituted Acetylenes Using Halides of Niobium (V) and Tantalum (V) as Catalysts", J. Chem. Soc., Chem. Commun., 1297-98 (1982).
Air Products and Chemicals Inc.
Marsh William F.
Rodgers Mark L.
Simmons James C.
Smith Edward J.
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