From Mary Bellis,
Your Guide to Inventors.
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< Introduction: The Invention of Elastic

In 1823, Scottish chemist Charles Macintosh patented a method for making waterproof garments by using rubber dissolved in coal-tar naphtha for cementing two pieces of cloth together.

The now famous macintosh raincoat was named after Charles Macintosh. Macintosh raincoats were first made using the methods developed by Charles Macintosh.

Charles Macintosh Invents Waterproof Fabric

While he was trying to find uses for the waste products of gasworks, Macintosh discovered that coal-tar naphtha dissolved india rubber. He took wool cloth and painted one side with the dissolved rubber preparation and placed another layer of wool cloth on top.

Improvements to Waterproof Fabrics

This created the first practical waterproof fabric, but the fabric was not perfect. It was easy to puncture when it was seamed, the natural oil in wool caused the rubber cement to deteriorate. In cold weather the fabric became stiffer and in hot weather the fabric became sticky. When vulcanized rubber was invented in 1839, Macintosh's fabrics improved since the new rubber could withstand temperature changes.