HOT MELT ADHESIVE COMPRISING WATER SOLUBLE POLYALKYLOXAZOLINE AND WATER INSOLUBLE POLYMER

摘要

Normally water insoluble hot melt adhesive compositions containing structural polymers such as A-B-A block copolymers, butyl rubbers, polyesters, ethylene vinyl acetates, ethylene acrylic acid polymers can be made sensitive to the action of water using an effective water sensitizing amount of a polyalkyloxazoline polymer in the hot melt adhesive. The polyalkyloxazoline polymer can be incorporated into a single phase adhesive composition with the structural polymer using an effective amount of a hydroxyl or carboxylic acid compound. The compositions are comprised of: (a) about 10-30 wt % of a thermoplastic aqueous insoluble polymer; (b) about 1-75 wt % of an N-substituted polyalkyleneimine of the formula: wherein N is about 2-3, m is about 100-10,000, and R is a C1-3 alkyl group; (c) about 2-90 wt % of a diluent, either an acid functional organic compound having an acid number of at least 75, or a hydroxy substituted organic compound having a hydroxyl number of ?150; and (d) about 0-60 wt % of a compatible plasticizer or tackifier.