Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heavy metal or aluminum reactant having at least one...
Patent
1994-06-24
1996-01-30
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heavy metal or aluminum reactant having at least one...
528395, 556 11, 556 12, 556 28, 556 82, C08G 7900
Patent
active
054880912
ABSTRACT:
A method for coupling tin-containing molecules via a Sn--Sn bond is described. The invention employs dehydrocondensation to link the Sn atoms of two molecules to form tin dimers as well as novel high molecular weight organotin polymers. In a preferred embodiment, catenated tin polymers are formed from hydrostannane precursors in the presence of a suitable metal catalyst. A particularly preferred method involves coupling dialkylstannane monomers in the presence of a metallocene catalyst to form polystannanes. Preferred catalysts include electropositive metals, such as Zr and Hf. The polystannanes are photolabile, decomposing readily under room light conditions.
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Imori Toru
Tilley T. Don
Marquis Melvyn I.
The Regents of the University of California
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