polyvinyl-acetal

polyvinyl acetal

noun Chemistry.
1.
any of the class of thermoplastic resins derived by the condensation of an aldehyde with polyvinyl alcohol.
2.
the slightly yellow, water-insoluble resin produced from partially hydrolyzed polyvinyl acetate and formaldehyde: used chiefly in the manufacture of lacquers, photographic film, and adhesives.

Origin:
1930–35

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