... soft (hard) foam polyurethane, epoxy resin, polystyrene, acrylic, cellulose acetate, ethyl cellulose and Bakelite resin, polyvinyl acetate resin, and foam fillers gun agent ... mainly used as f soft or hard polyurethane foam, epoxy resin polystyrene, acrylic acid, cellulose acetate, ethyl cellulose paint, phenolic plastics ...