Pressure-sensitive adhesive comprising hollow tacky microspheres and macromonomer-containing binder copolymer
Patent 4994322 Issued on February 19, 1991. Estimated Expiration Date: 
September 18, 2009. 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.
September 18, 2009. 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 3400095 3578622 3691140 3786116 3842059 3857731 Pressure sensitive hot-melt adhesive system Tacky polymeric microspheres Low tack microsphere glue Acrylate copolymer pressure-sensitive adhesive composition and sheet materials coated therewith InventorsAssigneeApplicationNo. 407092 filed on 09/18/1989US Classes:428/343, Adhesive outermost layer428/355AC, Including addition polymer from alpha-beta unsaturated carboxylic acid (e.g., acrylic acid, methacrylic acid, etc.) or derivative thereof428/355CN, Including nitrogen containing polymer (e.g., polyacrylonitrile, polymethacrylonitrile, etc.)428/402, Particulate matter (e.g., sphere, flake, etc.)521/54, Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition521/56, Particle which is expandible, process of preparing an expandible particle, or process of expanding a particle to form a cellular product521/60, Adding expanding agent subsequent to solid polymer formation521/63, Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step521/64, Removing a liquid to form a cellular product521/134, Cellular product derived from two or more solid polymers or from at least one solid polymer and at least one polymer-forming system523/223, Process of forming a composition of a spheroidal material having physical dimension or composition containing same524/801, Process of preparing water-in-oil emulsion or dispersion, or product thereof525/205, Heterocyclic reactant is an imide or lactam525/218, Nitrogen reactant contains a carboxylic acid amide group525/221, Solid polymer derived from reactant containing a carboxylic acid group525/228At least two polymers derived from carboxylic acid ester reactantsExaminersPrimary: Foelak, MortonAttorney, Agent or FirmForeign Patent References
International ClassesC08J 009/236C08J 009/32 AbstractA repositionable pressure-sensitive adhesive comprising from about 70% to about 99% hollow, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomeric microspheres comprising at least one alkyl acrylate or alkyl methacrylate ester, a majority of the microspheres having one or more interior voids having a diameter of at least about 10% of the diameter of the microsphere, and correspondingly, from about 30% to about 1% of a binder copolymer comprising an elastomeric polymeric backbone having pendant therefrom high Tg polymeric moieties.Other References
Field of SearchAdhesive outermost layerParticulate matter (e.g., sphere, flake, etc.) Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition Particle which is expandible, process of preparing an expandible particle, or process of expanding a particle to form a cellular product Adding expanding agent subsequent to solid polymer formation Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step Removing a liquid to form a cellular product Cellular product derived from two or more solid polymers or from at least one solid polymer and at least one polymer-forming system Process of forming a composition of a spheroidal material having physical dimension or composition containing same Process of preparing water-in-oil emulsion or dispersion, or product thereof Heterocyclic reactant is an imide or lactam | |
