FOLIE AUS KLEBRIGEM HYDROPHILEM GEL UND VERFAHREN ZU DEREN HERSTELLUNG.

摘要

A solid sheet of adhesive hydrophilic gel which is a homogeneous aqueous mixture, substantially free of unbound water, monomers and crosslinking agents, consisting essentially of an amount dispersed uniformly in water of from about 4 to 35 wt.% of a crosslinked polyethylene oxide, effective to form with the water a tacky surfaced viscoelastic solid which sheet of hydrophilic gel is produced by subjecting a liquid film of an aqueous solution having a viscosity of about 2-2,000 x 10<3> cps of water soluble polyethylene oxide having a weight average molecular weight from about 0.02-6 x 10<6> Daltons to an amount of high energy radiation effective to convert the liquid film to a sheet of the viscoelastic solid having an adhesive face.