Polyurethane

= Polyurethane = Polyurethane is a synthetic resin in which the polymer units are linked by urethane groups, used chiefly in paints and varnishes. It is a chain or organic units joined by carbonate links. Polyurethane polymers are formed by combining two bi- or or higher functional monomers. One contains two or more isocyanate functional groups and the other contains two or more hydroxyl groups. More complicated monomers are also used. The alcohol and isocyanate groups combine to form a urethane linkage Polyurethane is a plastic metal which exists in foams, spray foams, sheets, and can be used for molds and casting. polyurethane is used in clothing, coating (for cables, floors and walls), adhesive, the bottoms of shoes, furniture, building insulation and bowling balls.



Health and Safety:
Fully reacted polyurethane polymer is chemically inert. No exposure limits have been established by OSHA (Occupational Safety and Health Administration) or ACGIH (American Conference of Governmental Industrial Hygienists). It is not regulated by OSHA for carcinogenicity. Polyurethane polymer is a combustible solid and can be ignited if exposed to an open flame. Decomposition from fire can produce mainly carbon monoxide, and trace nitrogen oxides and hydrogen cyanide. Firefighters should wear self-contained breathing apparatus in enclosed areas. Liquid resin blends and isocyanates may contain hazardous or regulated components. They should be handled in accordance with manufacturer recommendations found on product labels, and in MSDS (Material Safety Data Sheet) and product technical literature. Isocyanates are known skin and respiratory sensitizers, and proper engineering controls should be in place to prevent exposure to isocyanate liquid and vapor. Proper hygiene controls and personal protective equipment (PPE), such as gloves, respirators, and protective clothing and eye wear should be used. In the United States, additional health and safety information can be found through organizations such as the Polyurethane Manufacturers Association (PMA) and the Center for the Polyurethanes Industry (CPI), as well as from polyurethane system and raw material manufacturers. In Europe, health and safety information is available from ISOPA, the European Diisocyanate and Polyol Producers Association. Regulatory information can be found in the Code of Federal Regulations Title 21 (Food and Drugs) and Title 40 (Protection of the Environment).