POLYMERIC COMPOSITIONS FOR MOISTURE VAPOUR PERMEABLE STRUCTURES WITH IMPROVED STRUCTURAL STABILITY AND STRUCTURES COMPRISING SAID COMPOSITIONS

摘要

The present invention relates to hydrophilic polymeric compositions for maki ng a liquid impermeable moisture vapour permeable structure, for example by forming the composition into a layer or coating onto a suitable substrate fo r example a microporous film and to composite structures comprising the compositions. The hydrophilic polymeric compositions of the present inventio n do not solidify at room temperature, but remain viscous or "creamy". This prevents layers made from the hydrophilic polymeric composition of the prese nt invention from settling as a film so that delamination of a composite structure comprising the hydrophilic polymeric composition coated into a lay er onto a suitable substrate is avoided. The hydrophilic polymeric compositions of he present invention can find a variety of applications wherein liquid imperviousness and moisture vapour permeability are desirable.