Emulsion polymers
Patent 5288787 Issued on February 22, 1994. Estimated Expiration Date: 
June 10, 2011. 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.
June 10, 2011. 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 3684759 Aqueous polyurethane dispersions from solvent-free prepolymers using sulfonate diols Aqueous solutions or dispersions of polyisocyanate addition products, a process for the production thereof and the use thereof as coating agents or as sizing agents for paper Process for the production of aqueous polymer dispersions, the dispersions obtainable by this process and their use for the production of coatings Patent #: 4918129 InventorsApplicationNo. 714317 filed on 06/10/1991US Classes:524/457, Polymerizing an ethylenic monomer in the presence of a preformed SICP or solid polymer and in the presence of a nonreactive material so as to form an aqueous dispersion, latex, suspension, or emulsion therewith; or product thereof525/455Mixed with ethylenically unsaturated reactant or polymer therefromExaminersPrimary: Bleutge, John C.Assistant: Sweet, Mark D. Attorney, Agent or FirmInternational ClassC08K 003/20Foreign Application Priority Data1988-07-20 DEAbstractEmulsion polymers obtainable by emulsifying a mixture consisting ofA) 5 to 95 % by weight of at least one monomer from the series consisting of acrylonitrile, methacrylonitrile, optionally substituted styrene, vinyl carboxylate andB) 5 to 95 % by weight of acrylic and/or methacrylic esters,the sum of components A)+B) being 100% by weight, in the presence of an aqueous solution or dispersion of an anionically modified polyurethane, preferably containing --SO3-Me+ and/or -COO- Me+ groups (Me+ =cation, preferably H+, Na+, K+, Li+, NH4+ or a substituted ammonium ion), and subjecting the resulting emulsion to a polymerization initiated by free radicals.The emulsion polymers produced are preferably used as surface sizing agents for paper.Field of SearchPolymerizing an ethylenic monomer in the presence of a preformed SICP or solid polymer and in the presence of a nonreactive material so as to form an aqueous dispersion, latex, suspension, or emulsion therewith; or product thereofMixed with ethylenically unsaturated reactant or polymer therefrom 5- or 6-membered nitrogen ring compound having at least one oxygen in the ring | |
