Lacquer coatings and coating process for polyurethane-molded articles
Patent 4855347 Issued on August 8, 1989. Estimated Expiration Date: 
September 12, 2008. 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 12, 2008. 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 3186964 3551375 3893868 Process for preparing polyurethane molded part Release agent for removing plastics, especially polyurethane plastics from molds Polyisocyanate addition products useful as mold release agents and a process for their production Patent #: 4478893 InventorsAssigneeApplicationNo. 07/244553 filed on 09/12/1988US Classes:524/267, Two or more Si atoms and at least one Si-C or Si-H group264/308, Incremental layer molding type264/46.6, Against inner surface of a hollow preform or solidified layer524/315, Carboxylic acid ester524/376, OH group, e.g., ether-alcohol solvent, etc.524/379, Carbon atom single bonded to an oxygen atom and wherein the carbon atom is not double bonded to a chalcogen atom DNRM, e.g., alcohols, etc.524/590With reactant containing at least one C-OH, (C=O)-OH or -C-O-C- groupExaminersPrimary: Ivy, Warren C.Attorney, Agent or FirmInternational ClassesC08J 3/09 (20060101)C08J 3/02 (20060101) C09D 175/04 (20060101) C08J 7/00 (20060101) C08J 7/04 (20060101) AbstractAn in-mold lacquer coating, and a process for utilizing the same, for producing a polyurethane-based molded article. The lacquer coating is mold-releasable without the aid of an external mold release agent, is re-coatable after de-molding without additional surface preparation, and comprising a mixture of a pre-reacted aliphatic polyurethane resin, a technically simple silicon resin mold-release agent, and an aromatic, acetate and alcoholic solvent system that is incompatible with the silicon resin and that has constituents with specific gravities less than the silicon resin and with varying rates of evaporation such that the ratio of aromatic to alcoholic solvents decreases as the solvent system evaporates. | |
