polyisobutylene

American  

[pol-ee-ahy-suh-byoot-l-een] / ˌpɒl iˌaɪ səˈbyut lˌin /

Also polyisobutene

noun

Chemistry.

1. a polymer of isobutylene, used chiefly in the manufacture of synthetic rubber.

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Etymology

Origin of polyisobutylene

First recorded in 1930–35; poly- + isobutylene

Example Sentences

One major ingredient is usually polyisobutylene, which is made by combining molecules of certain chemicals with a butane derivative of crude oil.

From Time Magazine Archive

Detroit automakers have found that regular use of the polyisobutylene compounds can occasionally clog small oil passages and cause engine damage.

From Time Magazine Archive