Mercury-Free pur adhesive bonds to thermoplastics

摘要

A new line of polyurethane adhesives that do not contain mercury are recommended for assembly of thermoplastic components and other parts aimed at the global marketplace that is governed by new,strict environmental regulations.In the past,mercury catalysts have been used in PUR to promote curing.New mercury-free Araldite 2041-1 and 2042-1 from Huntsman Advanced Materials,The Woodlands,Texas,reportedly are fast setting,with open times of 2.5 to 12 min,and attain handling strength after 6 hr at 77 F.They bond PC,ABS,nylon,and Metton DCPD liquid molding resin with minimal surface preparation.