Дата выхода: | сентябрь 2012 |
ISBN: | 978-5-5111-3445-1 |
Объём: | 86 страниц |
High Quality Content by WIKIPEDIA articles! A polyurethane (PUR and PU) is any polymer composed of a chain of organic units joined by carbamate (urethane) links. Polyurethane polymers are formed through step-growth polymerization, by reacting a monomer (with at least two isocyanate functional groups) with another monomer (with at least two hydroxyl or alcohol groups) in the presence of a catalyst.