https://doi.org/10.1351/goldbook.15286
Polymer composed of macromolecules containing keto groups as linkages in the backbone: \[\ce{-CO\bond{-}}\]
Notes:
- A polyketone containing in addition to keto groups also ether linkages in the main chains is usually referred to as a polyetherketone.

- A polymer containing only pendent keto groups, such as a polyvinyl ketone, as well as a polymer containing main-chain carbonyl groups directly linked to a main-chain heteroatom, such as a polyester or a polyamide, is excluded.