Formaldehyde is used to make Methylene bis (dephenyl di-isocyanate) (MDI), a building block for polyurethane foams. Applications for MDI include the rigid, lightweight foams found in automobile doors for insulation as well as the semi-flexible foams that provide excellent support and comfort for car seats. Polyurethane coatings made with MDI are also used as finishes and sealants for car doors and windows as well as adhesives to secure bumpers, spoilers and interior panels.
Formaldehyde is used to make pentaetythritol (Penta), a versatile building block for the production of a number of chemicals and materials such as alkyd resins. Because alkyd resins are durable, low-cost and have high heat and chemical resistance, they are found in the product finishes and coating for automobiles. Penta is also used to make neopolyol esters, an ingredient in lubricants for gas and diesel engines.
Formaldehyde is a chemical building block of 1,4-Butanediol (BDO), which is then converted into other substances like polybutylene terephthalate resins (PBTs). In automotive applications PBTs are used to make car bumpers and metal parts in car engines.
Polyoxymethylenes (POM)?are formaldehyde-based thermoplastics that have replaced many metal parts in automobiles. In the EU, one of the largest applications for POM is the manufacture of fuel pumps in cars due to its superior resistance to gasoline and its excellent lubricant properties. POM is also used to make:
- Gear selectors
- Plastic components of seat belt systems
- Automatic transmission parts
- Locks, hooks, fasteners, clips and mirrors
- Car heater plates
- Steering column shear pin parts
- Control switches and instrument knobs
- Suspension links
- Door handles, door catches and window cranks
- Tyre valve stems
- Trunk release levers
- Electrical switch parts
- Exterior and interior trim
- Windshield washer nozzles
- Light sockets
- Fuel system components
- Fan parts and car ventilation grille