Hot melt adhesive having controllable water solubility

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...


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524612, 525 92A, 428346, 428355CN, 428344, C08L 5300, C08L10104, B32B 712




A water sensitive hot melt adhesive composition based on polyalkyleneimine copolymers for use with articles such as paper products, disposable nonwoven products, tapes, labels and packaging materials. By varying the amount of copolymer included in the composition as well as by varying the chain structure and the ratio of soluble versus insoluble repeating units in the copolymer, an adhesive may be formulated to modify the degree of solubility from 100% to 0% soluble in water and/or other performance characteristics. The adhesive composition includes about 10% to about 70%, by weight, of a polyalkyleneimine copolymer or a blend of one or more polyalkyleneimine copolymers; about 0% to about 70%, by weight, of a tackifying resin; about 10% to about 70%, by weight, of a compatible plasticizer; and about 0.1% to about 3% by weight of one or more antioxidant. The adhesive maintains the article in an assembled condition by providing adequate adhesive bond strength during normal use, but dissolves in the presence of water thereby permitting the article to be recycled or otherwise disposed of in an environmentally friendly manner.

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