Patent ID: 7306851

Claim:
A patch repair system, said system comprising: a laminate comprised of a layer of a thermoplastic resin and a layer of a coating of a highly crystalline thermoplastic, predominately linear hydroxyl polyurethane (TPU) adhesive, with a crystallization of at least 10 as measured using test DIN 53 240, said adhesive having a latent thermally activated curing component; said adhesive coating providing the laminate with an adhesive surface that when activated forms an adhering patch to a collapsible tank and the like having a damaged area; and a fugitive solvent selected from the group consisting of a ketone, an aldehyde, an ester, an aromatic hydrocarbon, an ether, a chlorinated alkane and blends thereof applied to the surface of the adhesive, said applied fugitive solvent temporarily activating the adhesive such that until the solvent dissipates, the crystallinity of the TPU adhesive is disrupted making the adhesive tackier with superior wetting, and mobilizing the latent cure component enabling curing of the adhesive.