Tacky microspheres having pendant hydrophilic polymeric or oligomeric moieties
Patent 5508313 Issued on April 16, 1996. Estimated Expiration Date: 
November 2, 2014. 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.
November 2, 2014. 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 2532011 2607711 3318852 3691140 3890282 3891584 Tacky polymeric microspheres Water-soluble pressure-sensitive adhesive composition Adhesive copolymer microspheres-containing aqueous suspension and method for producing the same Adhesive copolymer microspheres-containing aqueous suspension and method for producing the same InventorsAssigneeApplicationNo. 333362 filed on 11/02/1994US Classes:521/63, Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step428/41.5, Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof (e.g., acrylamide, acrylate ester, etc.)428/317.5, Adhesive or bonding component contains voids428/355R, Adhesive compositions428/402, Particulate matter (e.g., sphere, flake, etc.)428/511, Paper or wood521/64, Removing a liquid to form a cellular product521/149, From oxygen containing reactant523/201, Solid polymer particle enclosed in layer of diverse solid polymer, e.g., core-shell, etc.524/548, From heterocyclic monomer524/555, From nitrogen-containing monomer other than acrylonitrile or methacrylonitrile524/558, Acid or ester contains an oxygen atom which is other than part of a free carboxyl group or carboxylic acid ester group524/801, Process of preparing water-in-oil emulsion or dispersion, or product thereof524/811, Monomer contains chalcogen atom as part of heterocyclic ring524/831, With unsaturated carboxylic acid or ester monomer524/833, Two or more carboxylic acids or derivatives524/903, AEROSOL COMPOSITIONS525/246, In presence of water525/279, Ethylenic reactant contains nitrogen heterocycle, e.g., pyridine, diazines, etc.525/296, Nitrogen atom is part of a carboxylic acid amide group525/301, Oxygen atom is part of a carboxylic acid group525/303, Ester contains an oxygen atom other than as a carboxylic acid ester group525/902, CORE-SHELL526/91, In presence of water526/306, Plural amide group containing526/312, Contains oxygen atom bonded to a carbon atom526/318, Carboxylic acid contains ester group526/318.4, With ester monomer526/333, Plural ether groups526/909, POLYMERIZATION CHARACTERIZED BY PARTICLE SIZE OF PRODUCT526/911, EMULSIFYING AGENTS526/931PRESSURE SENSITIVE ADHESIVEExaminersPrimary: Seidleck, James J.Assistant: Johnson, R. B. Attorney, Agent or FirmForeign Patent References
International ClassesC08J 009/28B32B 007/12 AbstractThe invention provides inherently tacky, polymeric, organic, solvent-insoluble, solvent dispersible, elastomeric, pressure sensitive adhesive microspheres having pendant hydrophilic polymeric or oligomeric moieties having a degree of polymerization greater than or equal to 2. The microspheres which are sterically stabilized can offer enhanced stability against coagulation caused by alkali, alkali salts, polyelectrolytes and repeated freeze/thaw cycles. The present invention also provides pressure-sensitive adhesives comprising these microspheres including aerosol spray PSAs, coated sheet materials prepared therefrom, and method of making the microspheres.Other References
Field of SearchAdhesive or bonding component contains voidsParticulate matter (e.g., sphere, flake, etc.) Paper or wood 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 From oxygen containing reactant Solid polymer particle enclosed in layer of diverse solid polymer, e.g., core-shell, etc. Process of preparing water-in-oil emulsion or dispersion, or product thereof Monomer contains chalcogen atom as part of heterocyclic ring With unsaturated carboxylic acid or ester monomer Two or more carboxylic acids or derivatives From heterocyclic monomer Acid or ester contains an oxygen atom which is other than part of a free carboxyl group or carboxylic acid ester group From nitrogen-containing monomer other than acrylonitrile or methacrylonitrile AEROSOL COMPOSITIONS In presence of water Ethylenic reactant contains nitrogen heterocycle, e.g., pyridine, diazines, etc. Nitrogen atom is part of a carboxylic acid amide group Ester contains an oxygen atom other than as a carboxylic acid ester group Oxygen atom is part of a carboxylic acid group CORE-SHELL In presence of water Plural amide group containing Contains oxygen atom bonded to a carbon atom Carboxylic acid contains ester group POLYMERIZATION CHARACTERIZED BY PARTICLE SIZE OF PRODUCT EMULSIFYING AGENTS PRESSURE SENSITIVE ADHESIVE With ester monomer Plural ether groups | |
