Hoechst Aktiengesellschaft

Michael Honel

Peter Ziegler

Gerd Walz

Walter Sprenger

Rudiger Lenz

Manfred Finke

Gerhard Brindopke

Hartmut Foedde

Wolfgang Wendt

Uwe Kubillus

Gerhard Brincopke

The invention relates to the use of crosslinked polymer microparticles having an average particle size of at most 5 .mu.m and a glass transition temperature (Tg) of at least +30.degree. C. in aqueous paint preparations as filler and/or as partial substitute of white pigments, in particular of titanium dioxide. Among other things, the corresponding paints show increased spreading power, less tendency for sedimentation and reduced crater formation.

Use of crosslinked polymer microparticles in paints as filler substitute

A curable compound carrying groups containing basic nitrogen, essentially comprising structural units derived from

Curable compounds

Carrier resin for pigment pastes, and its preparation and use The invention relates to paste resins based on epoxide compounds, containing (a) specific quaternary ammonium groups, (b) OH groups and (c) isocyanate radicals which are bonded to the epoxy compound and of which at least 10 mol % are derived from a long-chain, monofunctional isocyanate having at least 8 carbon atoms, the average molecular weight (Mn) of these paste resins being 500 to 10,000. The invention furthermore relates to the preparation of these paste resins, to their use for pigment pastes and to these pigment pastes. Water-dilutable paints, in particular electrocoating paints which contain the pigment pastes according to the invention, give trouble-free surfaces and comparable film thicknesses, even on different substrates.

Carrier resin for pigment pastes, and its preparation and use

Carrier resin for pigment pastes, preparation and use thereof The invention relates to paste resins comprising (a) quaternary ammonium groups, (b) hydroxyl groups, (c) urethane radicals and (d) groups of the formula (I) ##STR1## in which R.sup.1 to R.sup.4 independently of one another represent hydrogen or a hydrocarbon radical of 1 to 10 carbon atoms and X denotes hydroxyl or a urethane radical, the average molecular weight (Mn) of these paste resins being 500 to 10,000. The invention further relates to the preparation of these paste resins, their use for pigment pastes as well as these pigment pastes. Water-thinnable paints, especially electrocoating paints which comprise the pigment pastes according to the invention, furnish, from a variety of substrates, surfaces free from defects and comparable film thicknesses.

Carrier resin for pigment pastes, preparation and use thereof

A curing agent (A) for resins (B) which can be cured by means of isocyanates, which has an amine number of 20 to 150 mg of KOH/g and an OH number of not more than 20 mg of KOH/g and which contains per molecule at least two masked isocyanate groups which are reactive under the conditions of curing, obtained by reacting

Curing agent for synthetic resins, curable mixtures containing this

Polyamines based on derivatives of 1,3-bissubstituted 2-propanol containing a multiplicity of amino groups, the latter containing at least one primary amino group and additionally further N-basic groupings, prepared by reacting 1,2,3-trisubstituted propane compounds with bis(primary amines or with monoamines and bis(primary amines). The polyamines according to the invention are clear to yellowish or yellow products which, at room temperature, form viscous to highly viscous liquids or may be paste-like or wax-like. They may be used, inter alia, advantageously as starting products for the preparation of thermosetting, in particular water-dispersible and cataphoretically depositable binders based on aminourethanes for coating solid substrates, in particular metals.

Derivatives of 1,3-bissubstituted 2-propanol containing amino groups,

Non-crosslinked reaction products of compounds (A) which contain structural units carrying 1,3-dioxolan-2-one groups in random distribution and compounds (B) which contain at least one primary aliphatic or cycloaliphatic amino group and additionally at least one further basic amino group. These reaction products are suitable, if appropriate together with conventional curing agents, especially as binders for coatings, above all electrodip coatings.

Polymers containing amino groups, their preparation and their use

The invention relates to aminourethanes essentially composed of structural units derived from (.alpha.) polyamines of the general formula (I) ##STR1## and of structural units derived from (.beta.) oligomeric or polymeric compounds which contain at least one terminal 2-oxo-1,3-dioxolane group. The invention further relates to a process for preparing these aminourethanes and to their use in particular in paint formulations. The aminourethanes according to the invention are suitable in particular for use as curable water-dispersible binders in particular for cationic electrocoating.

Aminourethanes, preparation and use thereof

Aminourethanes, a process for their preparation and their use The invention relates to aminourethanes composed essentially of structural units derived from

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Mainz, Germany

Michael Honel