Surfactants based on hydroxynaphthoic esters and preparation and use thereof
June 28, 2009. 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 3306901 Oxyalkylated cyclic phenol-aldehyde resins and uses therefor Process for preparing aromatic hydroxy-carboxylic acid alkyl esters Novel 2-hydroxynaphthalene-1-aldehydes, process for preparing them and their use Preparation of hydroxy aromatic carboxylic acids and ester derivatives thereof Anionic compounds based on modified novolak oxyalkylates, their _preparation, and their use as foam-free surface-active agents Anionic surface-active compounds based on oxyalkylated naphthol novolacs and their use Patent #: 4403079 InventorsApplicationNo. 372311 filed on 06/28/1989US Classes:525/450, Solid polymer derived from hydroxy-containing carboxylic acid or derivative reactant516/77, Aqueous continuous liquid phase and discontinuous phase primarily solid (e.g., water based suspensions, dispersions, or certain sols*, of natural or synthetic ester-wax, beeswax, carnauba wax; or latex dispersion)560/56Ortho fused rings in acid moietyExaminersPrimary: Bleutge, John C.Assistant: Jagannathan, Vasu S. International ClassesC08F 232/00C08F 069/00 Foreign Application Priority Data1988-06-30 DEAbstractThe ever increasing demands on dispersants, emulsifiers and formulation aids, in particular in the preparation of azo dyes and pigments and in the preparation of dye and pigment dispersions, made it necessary to develop novel surface-active compounds.According to the invention, it has been possible by esterification of hydroxynaphthalenecarboxylic acids (on the carboxyl) with fatty alcohols or preferably with alkoxylates of fatty acids, resin acids or alkylphenols, condensation of the resulting esterification products with aldehydes to give novolak resins with subsequent alkoxylation and esterification of terminal OH groups with resin acids, fatty acids, aromatic carboxylic acids and hydroxycarboxylic acids with or without reaction with phthalic anhydride or maleic anhydride and sulfite to develop novel polyfunctional surfactant structures which are very highly suitable for a wide range of applications in dispersion and emulsification, in particular in the preparation and formulation of azo pigments. |
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