1 butyl rubber | Definition of butyl rubber
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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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More from Merriam-Webster on butyl rubber

Britannica.com: Encyclopedia article about butyl rubber

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