Pressure-sensitive adhesive having improved adhesion to plasticized vinyl substrates
Patent 4985488 Issued on January 15, 1991. Estimated Expiration Date: 
April 16, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 16, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re32249 3009235 3615972 3725122 3900674 Method of inhibiting plasticizer migration from plasticized poly(vinyl chloride) substrates Acrylic-type pressure sensitive adhesives by means of ultraviolet radiation curing Foam-like pressure-sensitive adhesive tape Self-adhesive tape Composite sheet material InventorApplicationNo. 509219 filed on 04/16/1990US Classes:524/555, From nitrogen-containing monomer other than acrylonitrile or methacrylonitrile428/343, Adhesive outermost layer428/354, Three or more layers428/355CN, Including nitrogen containing polymer (e.g., polyacrylonitrile, polymethacrylonitrile, etc.)524/548From heterocyclic monomerExaminersPrimary: Lesmes, George F.Assistant: Zirker, D. R. Attorney, Agent or FirmForeign Patent References
International ClassesC09J 007/02B32B 027/04 B32B 027/22 AbstractNormally tacky and pressure-sensitive adhesive, having excellent long-term adhesion to plasticized vinyl substrates, is prepared from a representative blend of dioctyl phthalate plasticizer and a copolymer of isoctyl acrylate, N-vinyl pryrrolidone, and acrylic acid; alternatives for each component are disclosed. In a preferred embodiment of the invention, the adhesive is coated in a thin layer on a sheet backing material to form a normally tacky and pressure-sensitive adhesive tape.Other References
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