Spraying polyurethane foam onto wet substrate - by spraying prepolymer and propellant gas from aerosol container

摘要

Polyurethane foam is sprayed onto wet substrates by spraying a polyurethane pre-polymer from an aerosol container contg. a propellant gas. The pre-polymer is sprayed onto the wet surface, the surface dries, and a thin layer of open-cell foam forms.