Glycerine phthalate
Glycerol phthalate was the first synthetic polyester. It came into use around World War I. It was used for waterproofing.
Glycerol phthalate was the first synthetic polyester. It came into use around World War I. It was used for waterproofing.
Glycerol phthalate was the first synthetic polyester. It came into use around World War I. It was used for waterproofing.
Source: Wikipedia "Glycerine phthalate" · CC BY-SA 4.0
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