butyl rubber

noun

Definition of butyl rubber

: any of a class of synthetic rubbers that are made by copolymerizing isobutylene with a small amount usually of isoprene at low temperature

First Known Use of butyl rubber

1940, in the meaning defined above

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The first known use of butyl rubber was in 1940

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Cite this Entry

“Butyl rubber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/butyl%20rubber. Accessed 11 Aug. 2020.

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