Polyether derivatives, their use as emulsifiers, and emulsions containing the new polyether derivative
Patent 4479887 Issued on October 30, 1984. Estimated Expiration Date: 
February 28, 2003. 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.
February 28, 2003. 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 ReferencesBiodegradable, alkali stable, non-ionic surfactants Stabilizer for mixture fuels Adducts of alcohols and olefin oxides, suitable for reducing the interfacial surface tension of oily phases with respect to water Patent #: 4302349 InventorAssigneeApplicationNo. 06/470900 filed on 02/28/1983US Classes:516/30, The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)510/417, Plural immiscible liquid phases (e.g., emulsion, oily and aqueous layers, etc.)510/506, Ether514/938, Oil-water type516/76The compound contains repeating -(OCnH2n)- (i.e., repeating unsubstituted oxyalkylene)ExaminersPrimary: Lovering, Richard D.Assistant: Brookes, Anne Attorney, Agent or FirmInternational ClassesB01F 17/00 (20060101)C08G 65/00 (20060101) C08G 65/06 (20060101) C08G 65/26 (20060101) Foreign Application Priority Data1982-03-03 DEAbstractNew polyether derivatives obtained by gradually adding at temperatures between 100° and 200° C. a long-chain 1,2-epoxide having a chain length of 10 to 32 carbon atoms to either (1) polyethylene glycol monoalkyl ether whose mean molecular weight is 400 to 2500 and whose alkyl group contains 1 to 3 carbon atoms; or to (2) a polyethylene glycol-polypropylene glycol monoalkyl ether whose mean molecular weight is 450 to 3100, whose recurring ethylene oxide units and propylene oxide units form a block each, the polypropylene glycol block having a mean molecular weight of not more than 600 and whose alkyl group forms the end of the polyethylene glycol block and contains 1 to 3 carbon atoms, using 0.1 to 1% by weight of alkali hydroxide related to the total amount of the starting substances.These polyether derivatives correspond to the general formula: ##STR1## wherein R1 represents an aliphatic hydrocarbon radical containing 1 to 3 carbon atoms;R2 represents an aliphatic hydrocarbon radical containing 8 to 30 carbon atoms;m=10-50 (mean value);n=0-10 (mean value);p=1-10 (mean value).The derivatives are suitable emulsifiers in emulsions, particularly in water-in-oil emulsions. | |
