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Glossary
Glossary of terms used in the polyurethanes business
Courtesy of Smithers-Rapra & Cromar Solutions Ltd, UK
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Filler
An inert material added to a polyurethane reaction mixture. Fillers are usually solid, particulate materials such as glass, silica or barytes.
Flame retardant
An added substance which inhibits the initiation and/or spread of flame.
Fluorocarbon
A substance containing fluorine and carbon with other chemical elements. The most common fluorocarbons used in polyurethanes are the volatile liquids CFM-11 (CCl
3
F) and CFM-12 (CCl
2
F
2
). CFM is an abbreviation of chlorofluoromethane. CFC is an abbreviation for chlorofluorocarbon.
Functionality (fn)
The average number of chemically-reactive groups on each individual molecule.