Process for controlling the molecular weight of poly(trialkylsilylpropyne) polymers
US4808679A · kind A · utility
1Cited by
2References
8Claims
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Assignee
Inventor
Key dates
| Filing date | Jan 19, 1988 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Jan 19, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F38/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.