When dad’s former employer started making plastics in the late 1920s, no market was itching to buy them. But the company, in a sense, had to make plastics.
Its new commercial antifreeze, Prestone, was synthesized from natural gas and created a by-product, ethylene dichloride, a chemical that had no practical purpose and so was stockpiled on-site. Quickly, it amassed in unmanageable, “embarrassing” quantities, as one Carbide newsletter later put it. Its best use, the company decided, was in making vinyl chloride monomer, recognized as a carcinogen since the ’70s, but back then a building block for a rascally class of plastics no one had commercialized yet—vinyls.

—Rebecca Altman, The Atlantic, 2022