Abstract: An apparatus for the treatment of flat-form material, especially of coated printed circuit boards, wherein the printed circuit boards are subjected to various treatment processes in succession, such as airflow treatment, drying, and cooling, while they are being transported through a housing in which treatment processes are carried out, there are provided in the housing, for the purpose controlling of the process and increasing the adaptability of the treatment installation, individual treatment zones separate from one another, and the printed circuit boards are conveyed into the individual treatment zones in groups, a separate treatment process being carried out in each treatment zone.

Abstract: The present invention is directed to a transport apparatus for thin, board-shaped substrates, for example printed circuit boards, which are conveyed through a coating installation and the like. In order to simplify manipulation during conveying, there is provided a frame (1) for holding a substrate (7), tensioning elements (4) being arranged spaced from one another on frame members (2), lying opposite one another, of the frame (1), which tensioning elements (4) engage the edge of the substrate and tension the substrate, the frame (1) being provided with a device (16) which serves to provide connection to a conveyor belt or the like. The tension springs (4) exert a tension away from the substrate (7) in the direction of the plane of the thin substrate to avoid sagging of the substrate. FIG. (1) illustrates the transport apparatus.

Abstract: Curable suspensions of an epoxy resin formulation comprisinga) a storage-stable suspension of an epoxy resin and a toughener suspended therein which contains no groups that react with a curable epoxy resin system,b) dicyandiamide, a polycarboxylic acid, a polycarboxylic anhydride, a polyamine, a polyaminoamide, an amino group-containing adduct of an amine and a polyepoxide, a polyol or a catalytically curing hardener, and, as optional components,c) a curing catalyst, conventional fillers or reinforcing materials,are particularly suitable for use as casting resins, laminating resins or adhesives.

Abstract: A curable composition consisting of at least 2 components (a) and (b), wherein(a) is a liquid oligomer or polymer having a molecular weight of 200-50,000 and containing dicarboxylic anhydride groups, and(b) is a compound of formula I ##STR1## wherein A is linear or branched C.sub.2 -C.sub.20 alkylene, C.sub.5 -C.sub.7 cycloalkylene, C.sub.7 -C.sub.10 bicycloalkylene, or C.sub.1 -C.sub.30 alkylene containing one or more than one C.sub.5 -C.sub.7 cycloalkylene group or C.sub.7 -C.sub.30 bicycloalkylene group in the main or side chain, which cycloalkylene and bicycloalkylene groups can be unsubstituted or substituted by one or several C.sub.1 -C.sub.6 alkyl groups, and R.sub.1 and R.sub.2 are independently of each other C.sub.1 -C.sub.18 alkyl, C.sub.4 -C.sub.10 cycloalkyl or C.sub.7 -C.sub.24 -aralkyl, which cycloalkyl and aralkyl groups can be unsubstituted or substituted by one or more than one C.sub.1 -C.sub.

Abstract: A process for impregnating an electrical coil which comprises a winding comprising two or more layers consisting of more than one turn of an electrically conducting wire-form material with a polymer material which electrically insulates the individual turns of the wire-form material from one another with the aid of a thermally curable epoxy resin composition, which composition is solid at room temperature and comprises the following constituents:(a) an epoxy resin which is solid at room temperature, selected from(a1) polyglycidyl ethers based on novolaks;(a2) diglycidyl ethers based on bisphenols, and(a3) mixtures of more than one of components (a1) and (a2);(b) a crosslinking agent for component (a);(c) a suitable accelerator for the reaction of component (a) and component (b);(d) from 15 to 70 percent by weight, based on the overall weight of the composition, of filler selected from(d1) calcium carbonate,(d2) quartz flour,(d3) wollastonite whose particles have an average ratio of length to cross-section whi

Abstract: Epoxy resins which are obtainable by a process in which, first of all(a) by reacting(A1) at least one substance selected from the substances of the formula (I) and of the formula (II): ##STR1## in which Alc is the radical of a diol which has been freed fromI ts hydroxyl groups and comprises 2 to 20 carbon atoms,Ac is the radical of a dicarboxylic acid which has been freed from its carboxyl groups and comprises 2 to 20 carbon atoms,[Ph] is the radical of a difunctional phenolic compound which has been freed from its phenolic hydroxyl groups and has 6 to 20 carbon atoms, andc is a number greater than 1 but not more than 2, with(A2) at least one liquid diglycidyl ether based on a first bisphenol compound in an amount chosen so that there are more than two equivalents of glycidyl groups of component (A2) for a total of one equivalent of carboxyl and phenolic hydroxyl groups of component (A1),a pre-advanced diglycidyl ether resin is formed in dispersion in the liquid diglycidyl ether of which there is at least one

Abstract: A composition, comprising(a) a Diels-Alder-adduct of cyclopentadiene,(b) a catalyst for the ring-opening metathesis polymerisation, and(c) 2-95% by weight of a filler, based on the entire composition,the filler containing at least 0.5% by weight of a basic adsorbent, based on the entire composition,gives cured products having excellent mechanical and electrical properties and is particularly suitable as coating material for electrical and electronic components.

Abstract: A method for the reactive coating or reactive encapsulation of fluidizable, organic or inorganic, anisotropic or isotropic substrates with a cross-linking, thermostable and insoluble thermoset by spraying onto substrates a cationically curing one-pot liquid resin system comprising a cationic initiator, which method comprises fluidizing the substrates in a fluidized-bed coater at a temperature above the activation temperature of the cationic initiator and then injecting the one-pot liquid resin system into the fluidized-bed coater through a spraying device, the one-pot liquid resin system having a gelling time of from 1 to 60 seconds at from 100 to 150.degree. C., results in unagglomerated substrates having a cross-linked, thermostable and homogeneous coating.

Abstract: The present invention relates to adhesive compositions comprising at least one light emitting material and which are suitable for bonding substrates together and may be detected and measured via non-invasive techniques.

Abstract: A photosensitive composition which is liquid at room temperature and which comprisesa) 18 to 22% by weight of a binder polymer based on a styrene-maleic anhydride halfester copolymer,b) 10 to 15% by weight of at least one photocurable acrylate compound,c) 0.1 to 10% by weight of a photoinitiator, andd) 45 to 70% by weight of a propylene glycol halfester or propylene glycol halfester, the sum of the components a) to d) being 100% by weight,is suitable for the production of photostructured objects, preferably for the production of telephone cards.

Abstract: An apparatus for the coating of flat-form substrates, especially of printed circuit boards, solder masks and the like, wherein there is arranged between two coating stations a turning station for the printed circuit boards, which are conveyed on a transporter pathway through the coating stations and the turning station, wherein in the turning station (4) there are provided in the same plane as the incoming transporter pathway (2) receiving elements (5) located, spaced apart, opposite one another, which enter into engagement with the edge of a printed circuit board (11) or a holding element attached to the printed circuit board, it being possible to pivot those receiving elements (5) through 180.degree. so that, when the printed circuit board is discharged, they again lie in the plane of the onwards-leading transporter pathway (2').

Abstract: A multi-pack system which comprises two or more components which react together to form a thermosetting resin characterised in that one of the components contains up to 0.01% by weight of a pH indicator.

Abstract: The present invention provides pourable curable composition which comprises the product obtained by mixing (a) a liquid epoxy resin containing a sufficient amount of a thixotropic agent to induce thixotropic properties with (b) a hardener composition which contains a tertiary amine compound in an amount sufficient to at least cause the mixture to become pourable after mixing.

Abstract: The present invention provides a coating composition comprising one or more curable resins which contain, among the resins, free acrylic moieties and free or reacted epoxy moieties, and a ketone blocked polyamine type curing agent, the ingredients being chosen to provide in the coating after curing, more than 50% by weight of cured epoxy groups and less than 50% by weight of cured acrylic groups.

Abstract: Heterogeneous photoinitiator in microparticle form, which consists of a finely divided substrate material to which identical or different photoinitiators are covalently bonded. The photoinitiators are suitable for the radiation-induced polymerization of photopolymerizable or photocrosslinkable monomers for the production of moldings, protective coats and relief images.

Abstract: A composition, which comprises (a) a cycloaliphatic epoxy resin,(b) an OH-terminated polysiloxane,(c) a polysiloxane/polyether copolymer, and(d) a cyclic polysiloxane,has excellent hydrophobic properties and can be used as electric insulation composition.

Abstract: The claimed invention relates to a method for coating a substrate, preferably a printed circuit board, comprising the step of applying to said substrate surface a photopolymerizable water-borne aqueous-alkaline developable coating composition. The novel composition comprises a certain film-forming, acid group-containing acrylated derivative of an epoxy resin which is sufficiently neutralized with ammonia or an amine or an inorganic base to promote the formation of the corresponding ammonium or amine or inorganic base carboxylates by a neutralization reaction; a photoinitiator; water; and, optional components; as well as one or more additional optional (meth)acrylate monomer or (meth)acrylate oligomer or a vinyl compound that can be crosslinked with light. The method produces coated substrates that are non-tacky after drying and that have good edge coverage.

Abstract: Core/shell particles comprising a core comprising an elastomer having a T.sub.G value of <0.degree. C., onto which a shell of a crosslinked copolymer is grafted, where the proportion of the crosslinking component in the copolymer of the shell is from greater than 5 to 90% by weight, based on the total amount of the comonomers of the shell copolymer, are suitable as toughening agents for epoxy resins, with which they have good compatibility.

Abstract: A casting device with which, by introducing a thermocurable plastics into a heatable casting mould (1), the plastics is thermally cum in that casting mould at least to such a degree that a casting moulded in that manner can be released from the mould, comprises a reservoir for the thermocurable plastics and a feed means for feeding plastics from the reservoir into the casting mould (1), which mould has an inlet opening that extends at least along a substantial portion of the length of the casting to be moulded, wherein the casting device comprises a separate adapter (2) in which the feed means (20, 221, 23) for the plastics is arranged and which can be connected to the casting mould (1) in such a manner that, when the adapter (2) has been connected, an outlet opening (23) provided in the adapter (2) is arranged sealed to and substantially congruent with the inlet opening of the casting mould (1).

Abstract: Epoxy resin casting compositions comprising(a) a liquid aromatic glycidyl or .beta.-methylglycidyl ether or a liquid mixture of several aromatic glycidyl or .beta.-methylglycidyl ethers containing on average more than one glycidyl ether group per molecule,(b) one or more than one acid hardener for the glycidyl ether,(c) a curing accelerator,(d) a filler mixture containing calcite and wollastonite in an amount from 40 to 60% by weight, based on components (a), (b) and (d), and as optional components,(e) customary additives for epoxy resin casting compositions are suitable in particular for coating or encapsulating electrical or electronic components and, more particularly, electrical ignition coils.