Polyurethane, method for the preparation of a polyurethane article and article fotocru00c8mico optical

摘要

"Polyurethane, method for the preparation of a polyurethane article optical and article fotocru00c8mico". The present invention relates to a polyurethane type containing a polyether.The polyurethane may include a pre polymer which comprises a poliisocianato and a material containing a polyether polyol type.The pre polymer may be reacted with a curing agent which contains amino to produce polyurethane of the present invention.In one implementation,The polyurethane of the type containing a polyether when at least partially healed and when tested as a lens with a hard coating on both surfaces having a maximum espessur CentreThe 2.2 mm in a flat configuration, can have a resistance to impact at least 148 feet per second as defined by the high impact test.