Phosphated silicone polymers
Patent 5070171 Issued on December 3, 1991. Estimated Expiration Date: 
June 27, 2010. 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 27, 2010. 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 ReferencesTertiary alcohol-bearing organosilicone polymers Sulfated silicone polymers Patent #: 4960845 InventorApplicationNo. 546358 filed on 06/27/1990US Classes:528/33, Silicon reactant contains two or more silicon atoms525/474, Solid polymer derived from silicon-containing reactant556/450Two silicons bonded directly to the same oxygenExaminersPrimary: Marquis, Melvyn I.International ClassC08G 077/04AbstractThe invention relates to a series of novel organofunctional silicone polymers which have an phosphate pendant 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.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 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. |
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