lactoprene

noun
lac·​to·​prene | \ ˈlaktəˌprēn\
plural -s

Definition of lactoprene

: any of several synthetic rubbers that are polymers or copolymers of an acrylic ester (as ethyl acrylate) and are characterized by good resistance to flexing and good resistance to hydrocarbon oils, oxygen and ozone, weather, and heat but not to low temperatures

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History and Etymology for lactoprene

lact- + isoprene

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