http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0089488-A2

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filingDate 1983-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f8f4394caf89118d770f6cc1de214fb0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_72464abcbb658b0d5ccc12a97569eaca
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_565e8689abedf1fdb5057cf7b495ae36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ec71579f693d31ecc2a6856badfe15f
publicationDate 1983-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-0089488-A2
titleOfInvention Water-dispersible binders for cationic electrocoating varnishes, and process for their preparation
abstract (A) niedermolekularen, aromatische Gruppen enthaltenden Epoxidharzen mit einem Epoxidäquivalentgewicht unter 375 mit (B) aliphatischen und/oder alicyclischen polyfunktionellen Alkoholen oder Carbonsäuren mit einem Molekulargewicht unter 350 unter Addition an die Epoxidgruppe derart, daß die Umsetzungsprodukte einen Anteil an aromatischen Gruppen, berechnet als Phenylengruppe, von 10 bis 45% enthalten, und weitere Umsetzung der Reaktionsprodukte von A und B mit (C) gegebenenfalls bis zu 60 Gew.-%, bezogen auf das gesamte Bindemittel, polyfunktionellen Alkoholen, Carbonsäuren und'oder SH-Verbindungen mit einem Molekulargewicht von 300 bis 5000, wobei die Molverhältnisse von (A), (B) und gegebenenfalls (C) so gewählt worden sind, daß das erhaltene Zwischenprodukt endständige Epoxidgruppen aufweist, und (D) durch weitere Umsetzung des Zwischenproduktes unter Addition einer phenolischen Hydroxylgruppe eines Mono- und/oder Diphenols an die Epoxidgruppen, wobei das Mono- oder Diphenol als Substituenten an dem oder den aromatischen Ringen mindestens eine Gruppierung der allgemeinen Formeln trägt, in der R' und R 2 untereinander gleich oder verschieden sind und für Wasserstoff oder eine Methylgruppe stehen, und durch Addition eines primären und/oder sekundären Amins an mindestens einen Teil der Doppelbindungen der Gruppierung gemäß Formel (1), wobei die Aminaddition vor oder nach der Umsetzung der phenolischen Hydroxylgruppen mit den Epoxidgruppen durchgeführt worden sein kann. The invention relates to water-dispersible binders for cationic electrocoating materials based on reaction products of modified epoxy resins and primary and / or secondary amines, which may contain crosslinking agents, pigments, leveling agents and other customary auxiliaries. The reaction products have been prepared by reacting (A) low molecular weight, aromatic group-containing epoxy resins with an epoxy equivalent weight below 375 with (B) aliphatic and / or alicyclic polyfunctional alcohols or carboxylic acids with a molecular weight below 350 with addition to the epoxy group such that the reaction products contain a proportion of aromatic groups, calculated as phenylene groups, from 10 to 45%, and further reaction of the reaction products from A and B with (C) optionally up to 60% by weight, based on the total binder, polyfunctional alcohols, carboxylic acids and SH compounds with a molecular weight of 300 to 5000, the molar ratios of (A), (B) and optionally ( C) have been chosen so that the intermediate product obtained has terminal epoxy groups, and (D) by further reaction of the intermediate with addition of a phenolic hydroxyl group of a mono- and / or diphenol to the epoxy groups, the mono- or diphenol as substituents on the aromatic ring or rings at least one group of the general formula carries, in which R 'and R 2 are the same or different from each other and represent hydrogen or a methyl group, and by addition of a primary and / or secondary amine to at least part of the double bonds of the grouping according to formula (1), the amine addition before or after the reaction of the phenolic hydroxyl groups with the epoxy groups.
isCitedBy http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2162189-A
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priorityDate 1982-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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