Global Polymerized Methylene Diphenyl Diisocyanate Polymerized Mdi Market By Type (Content 30%-31%, and Content 31%-32%), By Application (Refrigerator Freezer, Reefer Container, Building Materials Heat Preservation, Automobile Industry, and Adhesive), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029