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The glue was made from fish. Patents were then rapidly issued for adhesives using natural rubber, animal bones, fish, starch, milk protein or casein.
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Procter & Gamble chemical and packaging engineer, Paul Cope invented thermoplastic glue around 1940 as an improvement to water-based adhesives that were failing in humid climates.
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This was used to make an optically clear plastic for gunsights.
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Coover rejected cyanoacrylate because it was to sticky
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Coover and Joyner were researching a heat-resistant acrylate polymer for jet canopies when Joyner spread a film of ethyl cyanoacrylate between refractometer prisms and discovered that the prisms were glued together.
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Coover finally realized that cyanoacrylate was a useful product and in 1958 the Eastman compound #910 was marketed and later packaged as superglue.
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Archeologists excavating burial sites from 4000 BC have discovered clay pots repaired with glue made from tree sap.
