urethane
Noun
Meaning
A white crystalline substance, NH2.CO.OC2H5, produced by the action of ammonia on ethyl carbonate. It is used somewhat in medicine as a hypnotic. By extension, any one of the series of related substances of which urethane proper is the type.
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Enamel paint sometimes is mixed with varnish or urethane to improve its shine and hardness.
If water is present in the reaction mixture (it is often added intentionally to make foams), the isocyanate reacts with water to form a urea linkage and carbon dioxide gas and the resulting polymer contains both urethane and urea linkages.
Factors affecting catalyst selection include balancing three reactions: urethane (polyol+isocyanate, or gel) formation, the urea (water+isocyanate, or "blow") formation, or the isocyanate trimerization reaction (e.
CN9761 by Sartomer Arkema Group is an aromatic urethane acrylate oligomer supplied in tripropyleneglycol diacrylate TPGDA.
Aliphatic polyester based urethane diacrylate oligomer blended with 25% isobornyl acrylate.
During the last two hundred years farrier science has developed steel, urethane, rubber, plastic and aluminum shoes.