원료정의 (Definitions) |
Polyurethane-19 is a complex polymer formed by the reaction of m-tetramethylene diisocyanate, Neopentyl Glycol (q.v.), trimethylol propane, dimethylol propionic acid and a polyester formed by condensing neopentyl glycol and Adipic Acid (q.v.) The pre-polymer is neutralized with triethylamine and condensed with a combination of hydrazine and C1-8 diamines to achieve chain extension. |