Process of incorporating gelling and phase separation inhibitor into a filled polyurethane reactive hot melt adhesive

Abstract

Disclosed is a moisture reactive, polyurethane hot melt adhesive composition that is the reaction product of a first mixture comprising heat stabilizer and only one of polyester polyol or filler, wherein the first mixture can optionally comprise polyether polyol and/or thermoplastic polymer but does not comprise all of heat stabilizer and polyester polyol and filler; polyisocyanate; and a second mixture comprising the other of polyester polyol or filler not present in the first mixture; wherein the second mixture can optionally comprise polyether polyol and/or thermoplastic polymer. The moisture reactive hot melt adhesive can also comprise an additive selected from additional catalyst, additional filler, adhesion promoter, plasticizer, colorant, rheology modifier, flame retardant, UV pigment, nanofiber, defoamer, compatible tackifier, anti-oxidant, stabilizer, thixotrope and mixtures thereof.

Dependencies are inferred from the claim text.