摘要:
A binder which is water-dilutable on protonation with acid and obtainable by a reaction of(A) an epoxy resin having an average molecular weight of from 300 to 6,000 and on average from 1.5 to 3.0 epoxide groups per molecule and(B) from 20 to 30 mol %, based on the amount of epoxide groups present in epoxy resin (A), of one or more secondary amine and/or alkanolamine of up to 40 carbon atomsand subsequent reaction with(C) a copolymer which is based on butadiene and acrylonitrile and contains primary and/or secondary amino groups, the amount of (C) being so dimensioned that the number of primary and secondary amino groups corresponds to from 1 to 50 mol % of the epoxide groups present in the epoxy resin (A), and also(D) with one or more primary and/or secondary amine to convert any epoxide groups still present, is usedin particular for cathodic electrocoating.
摘要:
A synthetic resin which carries basic nitrogen groups and is water-dilutable by protonation with an acid, containing(A) a chain-extended, amine-modified epoxy resin obtainable by reacting(a.sub.1) an epoxy resin having an average molecular weight M.sub.n of from 300 to 6,000 and on average from 1.5 to 3.0 epoxy groups per molecule with(a.sub.2) a diketimine of a diprimary diamine, which diprimary diamine contains no further groups reactive with epoxy groups under mild conditions and(B) an amino-modified epoxy resin obtainable by reactingb.sub.1) an epoxy resin having an average molecular weight M.sub.n of from 800 to 6,000 and on average from 1.5 to 3.0 epoxy groups per molecule with(b.sub.2) a secondary amine or a secondary-tertiary diamine, a ketimine of a primary monoamine or a ketimine of a primary/tertiary diamine or a mixture of these (b.sub.2) components, with the proviso that (A) and (B) are different.
摘要:
A synthetic resin which carries basic nitrogen groups and is water-dilutable by protonation with acid is obtainable by reacting(A) an epoxy resin having an average molecular weight M.sub.n of from 300 to 6,000 and on average from 1.5 to 3.0 epoxy groups per molecule with(B) a ketimine of a primary amine additionally containing one or more urethane groups and optionally also with(C) a diketimine of a diprimary amine containing no urethane groups and optionally also with(D) a secondary amine which may contain a tertiary amino group also, a ketimine of a primary monoamine and/or a ketimine of a primary/tertiary diamine.
摘要:
A synthetic resin which carries basic nitrogen groups and is water-dilutable by protonation with acid is obtainable by reacting(A) an epoxy resin having an average molecular weight M.sub.n of from 300 to 6,000 and on average from 1.5 to 3.0 epoxy groups per molecule with(B) a ketimine of a primary amine additionally containing one or more urethane groups and optionally also with(C) a diketimine of a diprimary amine containing no urethane groups and optionally also with(D) a secondary amine which may contain a tertiary amino group also, a ketimine of a primary monoamine and/or a ketimine of a primary/tertiary diamine.
摘要:
A synthetic resin which carries basic nitrogen groups and is water-dilutable by protonation with acid is obtainable by reacting(A) an epoxy resin having an average molecular weight M.sub.n of from 200 to 6,000 and on average from 1.5 to 3.0 epoxy groups per molecule with(B) a ketimine of a primary amine additionally containing one or more urethane groups and optionally also with(C) a diketimine of a diprimary amine containing no urethane groups and optionally also with(D) a secondary amine which may contain a tertiary amimo group also, a ketimine of a primary monoamine and/or a ketimine of a primary/tertiary diamine.
摘要:
Binders which are rendered water-dilutable by protonation with an acid, a process for their preparation and their use.These binders are obtainable by reacting a(A) Reaction product of a(a) carboxyl-containing component, consisting of a(a1) carboxyl-containing butadiene/acrylonitrile copolymer having a molecular weight of from 500 to 8,000, if necessary as a mixture with(a2) a dicarboxylic acid which differs from (a1) and, if appropriate,(a3) a monocarboxylic acid and(b) a diprimary and/or primary/secondary amine, with the proviso that from 0.7 to 5 moles of the said amine are used per mole of carboxyl groups of component (a), with one or more(B) epoxy resins having a mean molecular weight from 300 to 6,000 and containing on average from 1.5 to 3.0 epoxide groups per molecule and, if required,(C) an aliphatic or cycloaliphatic secondary amine.In combination with a crosslinking agent, they are useful as coating materials, in particular for cathodic electrocoating.
摘要:
A synthetic resin which contains quaternary ammonium groups, and its preparation.The water-dilutable synthetic resin which contains quaternary ammonium groups and furthermore contains one or more basic secondary and/or tertiary amino groups per quaternary ammonium group is an adduct of(A) a quaternary ammonium salt which is obtained by reacting(a) an organic compound containing two or more basic amino groups per molecule, one of which is a primary group and is protected as a ketimine by prior reaction with a ketone, and the remaining groups are tertiary groups, with(b) an organic or inorganic acid and(c) a monoepoxide compound, and, if necessary, then eliminating the ketone hydrolytically,(B) a resin which contains on average from 1.5 to 3.0 epoxide groups per molecule, and, if required,(C) one or more monofunctional organic compounds whose functional group is capable of undergoing an addition reaction with an epoxide.This synthetic resin is suitable as a binder and a grinding resin for cathodic electrocoating.
摘要:
A processor for the preparation of urea condensates and the preparation of heat-curable surface coatings.To prepare these urea condensates, primary di- and/or polyamine is reacted with urea, a secondary monoamine and a polyalcohol which contains certain groups at elevated temperatures and in the presence or absence of a catalyst, and the ammonia formed is separated off.These urea condensates are suitable as binder components in heat-curable surface coatings, in particular for heat-curable cathodic electrocoating finishes.
摘要:
Heat-curable surface-coating agents useful in organically dissolved baking finishes, for powder coating and for cathodic electrocoating contain, as a binder, a mixture of a polyadduct, polycondensate or other polymer which has an average molecular weight M.sub.n of from 500 to 10,000 and, per molecule, on average two or more OH and/or NH groups, and a reaction product of a polyamine which contains on average two or more primary amino groups per molecule and a cyclic carbonic acid ester of the formula (I) ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each are hydrogen, methyl or ethyl.
摘要:
A synthetic resin carrying basic nitrogen groups, its preparation, coating materials prepared from this resin, and a process for cathodic electrocoating.This synthetic resin is obtained by reacting(A) an epoxy resin which(B) a diketimine of a diprimary amineand, if required,(C) with a secondary amine, which may additionally contain a tertiary amino group, with a ketimine of a primary monoamine and/or with a ketimine of a primary/tertiary diamine,a diketimine obtained from(B.sub.1) a ketone and(B.sub.2) a branched aliphatic diprimary diamine of 5 to 9 carbon atoms and/or(B.sub.3) one or more diaminodiamides which are obtained by condensation of 2 moles of diamine (B.sub.2) and 1 mole of a dicarboxylic acidbeing employed as component (B).After protonation with an acid, this synthetic resin is useful as a binder for cathodic electrocoating.