Last week science promised motorists another postwar boon: synthetic inner tubes that will hold air ten times as long as natural rubber, will need to be inflated only three or four times a year, and will run on nicely for miles after a puncture.
The material that makes this possible is butyl rubber, a synthetic which has been in commercial production for only two years. Standard Oil Development Co.. which developed it, said that butyl has now had a thorough tryout by the Army. has proved its value. Butyl's great virtue is that its carbon molecules have far fewer loose (saturated) ends...
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