Polymeric Mdi, Polyether Polyol manufacturer / supplier in China, offering PPG 200/400 Polypropylene Glycol (PPG) Polymer CAS 25322-69-4 Polypropylene Glycol, Competitive Prices Two Compound Closed Cell Polyurethane Spray Foam Raw Material for Insulation, Polymeric Mdi /Mdi Pm-200 Factory Price and so on.