Abstract: The invention relates to an aqueous 2-component polyurethane (PU) coating composition comprising a vinyl polymer polyol dispersion, having a hydroxyl number between 10 and 264 mg KOH/g solid resin, an acid value (calculated from the sum of neutralized and non-neutralized acid groups) between 0 and 55 mg KOH/g solid resin, a number-average molecular weight Mn of at least 5000 g/mol and a weight average molecular weight Mw of at least 30,000 g/mol, a glass transition temperature of at least 20° C. and an average particle diameter of no greater than 300 nm, which is prepared in the presence of 0.1 to 10.0 wt. %, relative to the sum of the solids contents of polymer polyol and polyisocyanate, of a non-ionic polyether surfactant and a polyisocyanate having a viscosity at 23° C. of no more than 12,000 mPa*s and either a non-hydrophilic or a non-ionically or anionically hydrophilic character, whereby the equivalent ratio of isocyanate groups of component b) to hydroxyl groups of component a) is 0.

Abstract: The present invention relates to a binder composition containing A) 70 to 99% of a polyurethane dispersion having an OH number of <10 mg KOH/g of solid resin and B) 1 to 30% of a water-dispersible polyisocyanate mixture prepared from an aliphatic, cycloaliphatic, araliphatic and/or aromatic diisocyanate, wherein the polyisocyanate mixture has a) an average isocyanate functionality of at least 2.0, b) a content of isocyanate groups (calculated as NCO; molecular weight 42) of 5.0 to 25.0 wt. %, and c) a content of ethylene oxide units of 2 to 50 wt. % (calculated as C2H4O; molecular weight 44) present within polyether chains containing an average of 5 to 35 ethylene oxide units, wherein at least 60 mole % of the polyether chains are connected via allophanate groups to two polyisocyanate molecules which are each prepared from at least two diisocyanate molecules and wherein the solids contents of components A) and B) add up to 100%.

Abstract: The present invention relates to radiation curable aqueous polyurethane dispersions containing 0.05 to 20 wt. %, based on the weight of the non-aqueous constituents of the aqueous polyurethane dispersions, of 2,2-dimethyl-3-hydroxypropionic acid-(2,2-dimethyl-3-hydroxypropyl ester), (HPSNPG, calculated as MW 204.3). The invention also relates to substrates coated with these polyurethane dispersions, in particular to coated wood substrates with good grain enhancing properties.

Abstract: The present invention relates to polyurethane-polyacrylate hybrid dispersions comprising A) 20 to 99% by weight, based on resin solids, of a polyurethane wherein i) the polyurethane is rendered hydrophilic by ionic and/or nonionic hydrophilic groups and ii) the polyisocyanate component used to prepare the polyurethane contains an aliphatic or cycloaliphatic polyisocyanate containing allophanate groups, and B) 1 to 80% by weight, based on resin solids) of a polyacrylate polymer, wherein the sum of components A and B is 100%, based on the total weight of A) and B). The present invention also relates to the use of these hybrid dispersions for coating substrates, in particular wood.

Abstract: The present invention relates to storage stable, aqueous polyurethane-polyacrylate hybrid dispersions, which are self crosslinkable at room temperature and contain A) 10 to 95 wt. %, of a polyurethane dispersion,B) 5 to 90 wt. %, of a polymer prepared in the presence of component A) from a mixture of vinyl monomers containing 0.5 to 20 wt. %, based on the total resin solids content of the hybrid dispersion, of a vinyl monomer containing acetoacetoxy groups andC) an at least difunctional primary or secondary amine, which is present in an equivalent ratio of amino groups to acetoacetoxy groups of 0.5:1 to 1.1:1,in which the wt. % of components A) and B) add up to 100, based on the total weight of components A) and B).The present invention also relates to one-component coating compositions containing these hybrid dispersions as binders and to substrates coated with these coating compositions.

Abstract: A process for the preparation of isocyanurate group-containing polyisocyanates in solvents which are inert towards isocyanate groups by reacting 0.2 to 1.5% of the isocyanate groups of diisocyanatotoluene with an aliphatic monohydric alcohol having 6 to 22 carbon atoms and subsequently trimerizing at least a portion of the isocyanate groups of the urethanized diisocyanates in the form of 40 to 70 wt. % solutions in lacquer solvents which are inert towards isocyanate groups, and the use of these polyisocyanates in two-component polyurethane coating compositions.

Abstract: Water-dispersible polyisocyanate compositions based on aliphatic and aromatic diisocyanates and having an NCO content, based on solids, of 6 to 21% by weight, a weight ratio of incorporated TDI units to incorporated HDI units of 6:1 to 0.1:1 and a content of ethylene oxide units, arranged within terminal polyether chains, of 5 to 40% by weight; a method for the preparation of these polyisocyanate compositions by reacting a polyisocyanate component with monovalent polyether alcohols containing ethylene oxide units at an NCO/OH equivalent ratio of 2:1 to 120:1; and aqueous coating compositions containing these polyisocyanate compositions and polyhydroxyl compounds as the binder.

Abstract: A water-dispersible polyisocyanate composition obtained by the partial urethanization of the isocyanate groups of 2,4- and/or 2,6-diisocyanatotoluene with monohydric and polyhydric alcohols, a process for its production, its use as the binder for an aqueous two-component coating composition in combination with a water-soluble or water-dispersible polyhydroxyl component and coatings for water-resistant sheet-form substrates prepared from this coating composition.

Abstract: A method for monitoring symmetrical two-wire bus lines and two-wire bus interfaces and a device for carrying out the method provides pulse weighting of low to high transitions or high to low transitions of the two wires operated in phase opposition of a two-wire bus line. The pulse chains thus obtained are used for step sequencing. In each case, one multistep shift function which is assigned to the first bus wire, is supplied with a first, constant logic read in state and can be reset to a second logic state in all-step fashion and, for all-step resetting of a similar second multistep shift function assigned to the second bus while, and vice versa, the step last achieved for each multistep shift function characterizing the respective fault state of the other bus wire. The pulse weighting is achieved by differentiation or high-pass filtering or by pulse generation controlled by state transition.

Abstract: An electrical switching device such as a low voltage power circuit breaker, can have a cover with a slot-like opening for providing access to a switch lever of the switching device. The cover can extend to cover over any chambers for shunt releases and/or auxiliary switches etc. which chambers can be located on both sides of the switch lever within the enclosure. The cover can also have fastening devices for attachment of a mechanical rotary actuator or a motor drive. The cover is connected to the enclosure in a manner which provides for a simple opening and closing of the cover, and essentially eliminates the danger of losing and mixing up such covers. The cover is designed with bearing legs which are bent at an angle of 90 degrees in relation to the cover plane. The bearing legs are preferably parallel to one another and laterally overlap the enclosure. The cover is mounted to the enclosure by means of the bearing legs and pivot bearing with coaxially interlocking pivots and pivot bearing openings.

Abstract: The present invention relates to hydrophilic polyurethanes having a content of (i) olefinic double bonds (expressed as C.dbd.C, molecular weight 24) of at least 1.0% by weight and (ii) ethylene oxide units incorporated through polyethylene glycol of 20 to 80% by weight, which are based on the reaction product ofa) 1.0 mole of a polyisocyanate component consisting of at least one organic polyisocyanate withb) 0.3 to 2.5 moles of at least one .beta.,.gamma.-ethylenically unsaturated ether alcohol containing 5 to 29 carbon atoms,c) 0 to 1.0 mole of at least one synthesis component containing at least two isocyanate-reactive groups and having a molecular weight of 62 to 2,000 andd) 0.25 to 0.85 moles of a polyethylene glycol component containing at least one polyethylene glycol having a molecular weight of 1,300 to 5,000,at an NCO/OH equivalent ratio, based on starting components a) to d), of 0.7:1 to 1.2:1.

Abstract: The present invention relates to a process for the production of olefinically unsaturated polyester resins containing at least 0.025 moles of urethane groups per 100 g of resin by reactingA) olefinically unsaturated polyester resins which contain alcoholic hydroxyl groups, have a molecular weight (M.sub.n) of 800 to 10,000, an acid vlaue of 0 to 50 and a hydroxyl number of 30 to 120, and are based on the reaction product ofI) a dicarboxylic acid component containing a) 90 to 100 mole percent of maleic acid, maleic anhydride and/or fumaric acid and b) 0 to 10 mole percent of another carboxylic acid andII) 1.1 to 1.5 moles, based on one mole of the dicarboxylic acid component, of a polyol component containing c) 0.1 to 0.5 moles of at least one saturated cycloaliphatic diol having 6 to 18 carbon atoms, d) 0.5 to 0.9 moles of at least one saturated aliphatic diol having 2 to 6 carbon atoms and e) 0.1 to 0.5 moles of at least one .beta.,.gamma.

Abstract: Unsaturated polyester resins having an acid number of from 0 to 50 and a hydroxyl number of from 10 to 150 which are composed of 0.6 to 0.8 moles of groups derived from maleic and/or fumaric acid, 0.2 to 0.4 moles of groups derived from norbornene dicarboxylic acid, 0.6 to 0.8 moles of groups derived from ethylene and/or propylene glycol, 0.2 to 0.4 moles of groups derived from diethylene glycol, 0.1 to 0.2 moles of groups derived from benzylalcohol and/or benzoic acid and 0 to 0.2 moles of groups derived from other alcohols, a process for their manufacture by a solvent-free or azeotropic esterification of said monomers and compositions which can be cured under influence of UV radiation, containing from 40 to 80 parts by weight of said polyester resins, from 20 to 60 parts by weight of styrene from 0.5 to 5 parts by weight of at least one photoinitiator and optionally known auxiliary agents and additives.

Abstract: Opaquely pigmented coatings can be produced from lacquers based on monomer-free air-drying polyesters by means of UV radiation if hydroperoxides are additionally employed alongside UV initiators.

Abstract: Unsaturated polyesters of defined composition with a low content of polyalkylene glycol radicals in a narrow molecular weight range can be dispersed in water without external emulsifiers. These dispersions produce, after hardening, water and chemical resistant coatings with good mechanical properties.

Abstract: The invention relates to acryloyl-containing polyesters having acid numbers AN of 1-50 mg of KOH/g of substance and having been polymerized from cocondensed units of(A) 1.0 mole of at least one dicarboxylic anhydride,(B) 0.02-0.08 mole of at least one saturated dihydric polyether alcohol having a molecular weight Mn of about 1,000 to 2,000,(C) 0.48-0.42 mole of at least one dihydric saturated alcohol,(D) 1.0 mole of at least one trihydric saturated oxyalkylated alcohol with a degree of oxyalkylation of 2-6, up to 50 mole-% of said oxalkylated alcohol may be replaced by a trihydric, saturated, non-oxalkylated alcohol, and(E) 1.0-2.0 moles of acrylic acid, to a process for their preparation, and to their use as radiation-curable binders in aqueous emulsion preferably for coating wood and woodlike materials, for which the presence of customary external surface-active agents and reactive radiation-curable diluents is not necessary.

Abstract: Nitrocellulose/polyester or alkyd resin dispersions having a high pot life and low requirement for coalescing agent may be prepared with the aid of water-insoluble aminoplast resins if care is taken to ensure that a mixture of these components is present within the particles of the disperse phase.

Abstract: Aqueous dispersion of a binder for coating compositions comprising 5-35% by weight of nitrocellulose, 0-30% by weight, based on (a) of plasticizer, 5-50% by weight of alkyd resin, 30-80% by weight of water, 0.5-10% by weight of emulsifier, and optionally 4-40% by weight of a urea resin and/or melamine resin.

Abstract: Alkyd resin lacquers which contain cellulose nitric acid esters can be prevented from "lifting" and yellowing by the addition of bis-[hydroxyphenyl]-alkanes which are substituted in the nucleus.