Process for controlling the molecular weight of poly(trialkylsil

Details Process for controlling the molecular weight of poly(trialkylsil Process for controlling the molecular weight of poly(trialkylsil

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).

Affiliated with

Also associated with

Rating

Process for controlling the molecular weight of poly(trialkylsil does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for controlling the molecular weight of poly(trialkylsil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for controlling the molecular weight of poly(trialkylsil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1368042