polystannane

https://doi.org/10.1351/goldbook.15302
Polymer composed of macromolecules containing exclusively tin atoms in the backbone: \[\ce{-[-SnR^{1}\!\,R^{2}\bond{-}]_{n}\bond{-}}\] where \(\ce{R^1}\) and \(\ce{R^2}\) are each hydrogen or an alkyl or aryl group.
Example:
polystannane
Source:
PAC, 2009, 81, 1131. (Glossary of class names of polymers based on chemical structure and molecular architecture (IUPAC Recommendations 2009)) on page 1168 [Terms] [Paper]