Butyl-rubber definitions

A synthetic rubber produced by copolymerization of a butylene with isoprene, nearly impermeable to air and used in tires, inner tubes, and insulation.
noun
0
0
Any of a group of synthetic rubbers that are basically copolymers of butylene and isoprene and that are especially impermeable to gases and resistant to abrasion, tearing, etc.
proper name
0
0
A synthetic rubber made by the polymerization of isobutene and isoprene.
noun
0
0