Abstract: Filter device for a molding machine with at least one filter element for filtering plasticized material, in particular plasticized plastic, wherein, in a fluidically parallel arrangement relative to the at least one filter element, at least one valve element is provided, which is formed to prevent the plasticized material from flowing through the at least one valve element during an injection process in a closed position and to allow the plasticized material to flow through the at least one valve element in an open position, in order to make it possible to relieve the pressure on the at least one filter element after the injection process.

Abstract: Finely divided coating agents based on (A) oligomers and/or polymers containing OH groups and (B) blocked polyisocyanates and, if required, further conventional additives, in which the component (B) contains at least one acylurethane possessing groups of the formula --CO--NH--CO--XR.sup.1 (I), wherein X represents oxygen or nitrogen, and, when X is oxygen, R.sup.1 represents alkyl, alkoxyalkyl, hydroxyalkyl, aryl, aralkyl or cycloalkyl, and, when X is nitrogen, the radical XR.sup.1 represents the group ##STR1## wherein R.sup.2 is C.sub.1-11 -alkylene, C.sub.1-11 -alkenylene, or unsubstituted or alkyl-substituted phenylene having up to 8 carbon atoms in the alkyl radical, and Y and Z together form an oxygen atom, or are identical or different and each denote hydrogen or C.sub.1-5 -alkyl, the coating agent being present in powder form or in the form of a dispersion. The coating agent is used for coating articles exposed to weather, and as top coats and primers.

Abstract: Process for the preparation of acylurethanes by reacting a urethane with compounds containing hydroxyl groups, which comprises reacting a hydroxy compound (A) with a urethane (B) in the form of an imide of the formula ##STR1## to give an acylurethane containing at least one grouping of the formula --CO--R--CO--NH--COOR.sup.1 (II). In these formulae,R denotes the hydrocarbon radical of an optionally .alpha.,.beta.-ethylenically unsaturated, aliphatic, cycloaliphatic or aromatic dicarboxylic acid or endomethylene derivatives thereof, andR.sup.1 denotes alkyl, alkoxy, alkoxyalkyl, cycloalkyl or benzyl.These acylurethanes are suitable for use as self-crosslinking curing agents or as curing agents for polyhydroxy compounds for the production of shaped articles and/or coatings.

Abstract: The invention relates to a process for preparing compositions for coating metal substrates or work pieces in an aqueous bath, in which the substrate forms the cathode.In this process 5-35% by weight of at least one epoxy resin, 2-20% by weight of at least one ketone and/or hydrocarbon resin, 15-60% by weight of at least one cationic synthetic resin having functional groups--this compound is a 10-50% by weight dispersion or solution--, 5-30% by weight of at least one organic cross-linking agent, which is solid at ambient temperature and 0-73% by weight of pigments and/or conventional adjuvants are processed together in one or more stages in a grinding apparatus to form a homogeneous coating composition. At least one stage being a wet operation. The composition has a particle size of less than 100 .mu.m, preferably less than 15 .mu.m. The grinding bath is adjusted with water to the solids content required for application.

Abstract: Preparation of heat-curable, water-dilutable coating compositions based on (A) epoxy resins free from amino groups, (B) an aqueous dispersion or solution of saturated polyester resins or the modification products thereof with oils, (C) organic cross-linking agents and optionally (D) pigments and/or conventional adjuvants, in specific proportions, these components being processed together in one or more stages, while being comminuted from their original particle size, to form a homogeneous coating composition which has a particle size of less than 100 .mu.m, and the use of the coating compositions thus obtained as coating agents, particularly for coating metal substrates, by the use of current-free methods of application or electrostatic spraying.

Abstract: A powder binder composition comprising a mixture of(I) an epoxy resin,(II) a hardener comprising a polyester having free carboxylic groups, and(III) from 0.05 to 5% by weight based on the weight of component II of an accelerator comprising at least one compound of the formulae ##STR1## wherein R represents a hydrogen atom or a C.sub.1-4 alkyl group,R.sup.1 represents a hydrogen atom or a nitro group,R.sup.2 represents a hydrogen atom or a C.sub.1-4 alkyl, C.sub.2-4 alkenyl group or a phenyl group,R.sup.3 represents a hydrogen atom or a C.sub.1-7 alkyl group,R.sup.4 represents a C.sub.1-12 alkyl group or a phenyl group,R.sup.5 represents a hydrogen atom or an aryl or C.sub.1-6 alkyl group, andX represents a hydrogen atom or a vinyl or C.sub.1-4 alkyl group and an article coated with said composition.

Abstract: An article comprising a metal substrate in the form of a pipe or a container, said substrate being coated with a hardened epoxy resin composition formed from (A) a solid epoxy resin based on epichlorohydrin and a component selected from the group consisting of (a) 4,4'-diphenylolpropane, (b) 4,4'-diphenylolmethane and (c) a combination of (a) and (b), (B) from 1 to 12% by weight based on the epoxy resin of at least one hardener for said epoxy resin selected from the group consisting of (d) compounds of formula ##STR1## wherein R is hydrogen or an alkyl group of 1 to 6 carbon atoms or an aromatic hydrocarbon residue with 6 to 10 carbon atoms, (e) compounds of formula ##STR2## wherein R is hydrogen or an alkyl group having 1 to 6 carbon atoms or an aromatic hydrocarbon residue with 6 to 10 carbon atoms and (f) an adduct of any one of compounds (d) and (e) to an epoxy resin with an epoxy equivalent weight of from 50 to 2000, (C) a flow agent, (D) a thixotropic agent and a process of coating such metal substrate

Abstract: A process for the manufacture of a powdered coating material having a basis of hardenable synthetic resins, hardeners and pigments selected from the group consisting of metals, metal alloys, and mica for coatings with a metallic appearance wherein the single components are mixed in a finely divided state under an atmosphere of a protective gas and wherein the mixture is plasticized, under homogenization, at a temperature at which the viscosity of the synthetic resin is higher than the drop viscosity, but at most sufficiently high as to guarantee the flow, is homogenized by shearing stress and transformed into a powdered state, a powdered coating material prepared by said process and an article being coated with said coating material.