Terminal phosphated silicone polymers
Patent 5149765 Issued on September 22, 1992. Estimated Expiration Date: 
October 17, 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.
October 17, 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 3385914 Phosphosilicone/silicate copolymers and their use as corrosion inhibitors and silicate stabilizers in antifreezes Ether amine functional silicone polymers Patent #: 5070168 InventorApplicationNo. 778506 filed on 10/17/1991US Classes:528/25, With organic silicon-free reactant525/474, Solid polymer derived from silicon-containing reactant528/30, From silicon-containing reactant having at least one polyvalent atom other than carbon, oxygen, or nitrogen528/33Silicon reactant contains two or more silicon atomsExaminersPrimary: Marquis, Melvyn I.Assistant: Hellender, Karen A. International ClassC08G 077/04AbstractThe invention relates to a series of novel organofunctional silicone polymers which have a phosphate terminal functionality present within the polymer. Compounds of the invention, by virtue of their phosphate group, provide a nonvolatile lubricant antistat which can be applied to a variety of fibers. The compounds of the invention deposit on the fiber surface thereby altering the surface's physical properties. Compounds of the present invention by virtue of their linear nature are film formers on a variety of substrates, including hair and skin.The compounds of the present invention are prepared by phosphation of a hydroxyl group on the silicone polymer. The compounds useful as raw materials are terminal dimethicone copolyols. The introduction of a phosphate group onto the silicone polymer is achieved by reaction of the hydroxyl group on the silicone with a suitable phosphating reagent. Another method of introducing the phosphate group is by the phosphation of the hydroxy containing vinyl intermediate which is subsequently reacted with the silicone polymer by hydrosilation. | |
