Method for the preparation of a highly concentrated, flowable and pumpable betaine solution
Patent 4832871 Issued on May 23, 1989. Estimated Expiration Date: 
April 15, 2007. 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.
April 15, 2007. 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 3366671 3912662 Low-irritant surfactant composition Concentrated aqueous surfactant compositions Low-irritant surfactant composition Concentrated organic sulphonate solutions Process for the preparation of betaines Patent #: 4497825 InventorAssigneeApplicationNo. 07/038731 filed on 04/15/1987US Classes:516/69, The compound contains -C(=O)NHH where substitution may be made for the hydrogen510/123, Amine oxide, quaternary, or zwitterion nitrogen component (e.g., betaine, sultaine, etc.)510/158, Cream, paste, or gel510/490, Nitrogen attached indirectly to the carboxyl group by nonionic bonding, or salt thereof516/900, LIQUID CRYSTAL MATERIAL OF, OR FOR, COLLOID SYSTEM (E.G., G PHASE)554/52Quaternary ammonium containingExaminersPrimary: Garvin, Patrick P.Assistant: Irzinski, E. D. Attorney, Agent or FirmInternational ClassesC07C 233/00 (20060101)C07C 233/89 (20060101) C11D 1/88 (20060101) C11D 1/90 (20060101) Foreign Application Priority Data1986-04-24 DEAbstractA method is disclosed for the preparation of a flowable and pumpable solution containing at least 70 weight percent of betaine of the following general formula ##STR1## in which R1 is the alkyl group of a fatty acid or a fatty acid mixture with an average of 6 to 18 carbon atoms, R2 and R3 are the same or different and represent an alkyl or a hydroxyalkyl group with 1 to 4 carbon atoms, x has a value of 2 or 3 and y a value of 1,2,3 or 4.The solutions prepared by the method have a viscosity of not more than 25,000 mPas at 25° C., as a result of which the compounding of the solutions to liquid soaps, shampoos, shower gels and other cosmetic preparations is facilitated, while at the same time the costs of dispensing, transporting and warehousing are reduced. Solutions containing at least 70 percent by weight of the above betaines are also disclosed. |
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