Tags: Chemical Compound, Chemical Substance.
Poly(2-hydroxyethyl methacrylate) (pHEMA) is a polymer that forms a hydrogel in water. It was invented by Drahoslav Lim and Otto Wichterle for biological use. Together they succeeded in preparing a cross-linking gel which absorbed up to 40% of water exhibited suitable mechanical properties and was transparent. They patented this material in 1953.
