Process for preparing copolymer polyols
Patent 4581418 Issued on April 8, 1986. Estimated Expiration Date: 
August 23, 2004. 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.
August 23, 2004. 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 ReferencesProcess for the preparation of thermoplastically workable fluoro-olefin polymers Method for the preparation of aqueous dispersions of polytetrafluoroethylene with halogenated hydrocarbon as stabilizing agent Preparation of thermoformable methyl methacrylate sheets Patent #: 4152506 InventorsApplicationNo. 06/643516 filed on 08/23/1984US Classes:525/404, Mixed with ethylenically unsaturated reactant or polymer therefrom524/792, Halogenated hydrocarbon DNRM525/48, Polymer mixed with unsaturated carboxylic acid, ester, salt, or anhydride525/49, Polymer mixed with unsaturated aromatic compound526/206, Material contains halogenated hydrocarbon wherein at least one halogen atom is other than chlorine, and mixtures of water and a halogenated hydrocarbon one ethylenic monomer560/26Polyoxy alcohol moietyExaminersPrimary: Kight, JohnAssistant: Moore, M. L. Attorney, Agent or FirmInternational ClassC08F 299/00 (20060101)AbstractCopolymer polyols are prepared by polymerizing ethylenically unsaturated monomer in a polyahl mixture in the presence of a triiodomethyl compound. The use of the triiodomethyl compound provides a lower viscosity, more stable copolymer polyahl. |
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