Patent ID: 6734274
Filing Date: 2004-05-11
Classification: C08G

Abstract:
A urethane composition for preparing a sheet transport roll for use in a copying machine, the composition comprising: (A) a polyether polyol blend containing polytetramethyleneether glycol (PTMG) end polypropylene glycol (PPG) in a weight ratio of PTMG/PPG=99/1 to 50/50; (B) a polyisocyanates; and (C) a chain lengthening agent, the urethane composition in a cured state having a hardness of not smaller than 40, and a crosslinking density of 0.15 to 0.8 mmol/cm3 or an allophanate bond concentration of 0.03 to 0.07 mmol/g.