Abstract: The invention relates to compounds with structures of the formulae I to IV ##STR1## in which formulae Tr is a radical of formula V or VI ##STR2## A is --O-- or --NR.sup.1 --, R.sup.1 is hydrogen or a monovalent organic radical,X is a di- or trifunctional radical of a hydroxycarboxylic or amino-carboxylic acid after removal of the functional groups,R.sup.2, if m is 1, has one of the meanings of R.sup.1, or R.sup.

Abstract: The invention relates to curable mixtures comprising(a) at least one epoxy resin containing on average more than one epoxy group in the molecule,(b) at least one diethylphenyl-biguanide of formula I ##STR1## or a combination of a biguanide of formula I and a ketone resin, a ketone/formaledhyde resin or a phenoxy resin, as curing agent, and(c) optionally a curing accelerator.These mixtures are suitable for example as casting resins, laminating resins and, in particular, as powder coating compositions.

Abstract: The invention relates to a substantially anhydrous composition containing(a) an epoxy resin,(b) as hardener for the epoxy resin, the product obtained (i) by finely homogenizing (1) dicyandiamide and (2) urea by grinding (1) and (2) together or dissolving (1) and (2) in a common solvent, or (ii) by melting (1) and (2) together or (iii) by partially reacting (1) and (2) in a common solvent, the weight ratio of (1) and (2) being in the range from 4:1 to 1:4, and, optionally,(c) a curing accelerator.The compositions are suitable in particular for the preparation of coatings, preferably as powder coating compositions, and are distinguished by a very good relationship between levelling and reactivity, and the cured coatings have excellent stability to solvents and boiling water as well as excellent mechanical properties.

Abstract: Addition of waxes or wax-like substances, in conjunction with metal salts or metal complexes of organic compounds, to powder coating compositions based on epoxy resins and carboxyl-terminated polyesters affords a matting effect without substantially impairing the other properties of said coating composition.

Abstract: The invention provides a process for producing thin-layered adhesive non-porpous films of lacquer on metal surfaces. An aqueous suspension of a solid thermosetting synthetic resin which contains a special alkylphenyloxethylate and/or a special aminococonut fatty acid oxethylate as wetting agent and optionally extenders is used for the purpose. The synthetic resin is in the form of a fine powder with an average granular size from 0.1 to 10 .mu.m. The film is applied by immersion , spraying, coating, rolling or the like, and the curing is preferably effected at elevated temperatures. The use of mixtures of epoxide resins and phenol-formalehyde resins is preferred.