PREPARATION METHOD FOR MOISTURE-CURING POLYURETHANE REACTIVE HOT MELT ADHESIVE FOR TEXTILE COMPOSITION  

Application number（美國專利號）: US201414917393 20140828 

A preparation method for moisture-curing polyurethane reactive hot melt adhesive for textile lamination mainly includes the following steps: (1) mixing and stirring polyether polyol 4000E, polyester polyol 3000H, polyester polyol 2000N, and an antioxidant, heating the mixture to about 120° C., and dehydrating for 0.5h under a vacuum of lower than 100 Pa; (2) adding a tackifying resin, heating the mixture to 135-140° C., and dehydrating for 1.5h under a vacuum of lower than 100 Pa; (3) lowering the temperature to 87° C., adding 4,4′-diphenylmethane diisocyanate and a catalysis, stirring the mixture, and reacting for 2h under a vacuum of lower than 100 Pa; (4) releasing vacuum, adding white carbon black, rapidly stirring the mixture evenly, and further stirring for 10 min under a vacuum of lower than 100 Pa; and (5) rapidly discharging at a temperature of 85-100° C., packaging, and then curing for 4h at 80-85° C., to obtain a target product. When applied in textile lamination, the product exhibits excellent peel strength, a relatively short open time, good hydrolysis resistance and desirable storage stability.