Abstract: The film disclosed in the application is secure against forgeries and serves for marking articles, in particular high-quality branded goods. It is comprised of at least one transparent polyester film oriented by stretching and containing in its composition an organic dyestuff which is heat stable at temperatures above about 260.degree. C. Preferably, a laminate is used which is comprised of two films, one of which contains a different colored dyestuff than does the other.

Abstract: An aqueous copolyester dispersion suitable for the subbing of polyester film without use of organic solvents wherein the copolyester contains recurring ester groups derived from ethylene glycol and an acid mixture essentially consisting of 20 to 60 mole % of isophthalic acid, 6 to 10 mole % of sulphoisophthalic acid whose sulfo group is in salt from, 0.05 to 1 mole % of an aromatic polycarboxylic acid compound having at least three carboxylic acid groups, which compound is not capable of forming intramolecularly an anhydride and includes at least two carboxylated aromatic nuclei, and the balance of terephthalic acid; the copolyester has a glass transition temperature of at least 50.degree. C. and an intrinsic viscosity of from 0.15 to 0.45 dl/g when measured at 25.degree. C. in a mixture of phenol/o-dichlorobenzene (60/40 by volume).

Abstract: A surface treating agent for a shaped article of a polyolefin is provided which is composed of a solution in an organic solvent of a propylene-ethylene copolymer having a monoalkyl ester of a monolefinic dicarboxylic acid, such as monomethyl maleate, grafted thereto. The propylene-ethylene copolymer has a propylene content of 50 to 75 mole %, and a crystallinity, determined by an X-ray diffraction method, of 2 to 20%. The esterification degree of the alkyl ester of the monolefinic dicarboxylic acid is 45 to 100% if the esterification degree is taken as 200% when all of the carboxyl groups of the dicarboxylic acid are esterified. The amount of the monoalkyl ester grafted is 0.5 to 15% by weight. The grafted propylene-ethylene copolymer has an intrinsic viscosity [.eta.] of at least 0.3 and is dissolved in an amount of 10 to 100 kg per cubic meter of the organic solvent. The surface treating agent is suitable as an undercoat for a polyolefin shaped article.

Abstract: The slide member is composed of a polymer composite material containing an unsaturated polyester resin, a thermoplastic resin and a granular inorganic filler. The slide member is of a double construction the surface of which is removed so as to expose part of the surface of the inorganic filler.The slide member thus constructed has particularly a favorable tape travelling property because it has a low friction coefficient, as well as the favorable properties inherent in the polymer composite material.

Abstract: A printable release coating composition having a combination of properties of good release, good ink retention, good adhesion, good tack and no backsize splitting is prepared having three essential components; (1) vinylidene chloride-acrylonitrile copolymer, (2) a polymer selected from vinyl chloride-vinyl acetate-vinyl alcohol terpolymer, vinyl acetate-vinyl alcohol copolymer and solvent soluble copolyester, and (3) vinyl ester-alkyl maleate copolymer.

Abstract: Coating of aramid filaments with certain polyfunctional aziridines increases interlaminar shear strength of unsaturated polyester matrix composites.

Abstract: An FRP molding can be in-mold coated using a free radical peroxide initiated thermosetting composition of at least one polymerizable epoxy based oligomer having at least two acrylate groups, at least one copolymerizable ethylenically unsaturated monomer, at least one copolymerizable monoethylenically unsaturated compound having a --CO-- group and a --NH.sub.2, --NH-- and/or --OH group, polyvinyl acetate, at least one zinc salt of a fatty acid having at least 10 carbon atoms, at least one accelerator for a peroxide initiator, conductive carbon black, a filler such as talc and a copolymerizable or cocurable compound selected from the group consisting of(I) at least one polyoxyalkylene glycol oligomer having two acrylate groups and(II) at least one polyurethane oligomer having two acrylate groups and mixtures of (I) and (II).Optionally and desirably, there additionally can be added to the foregoing composition at least one calcium salt of a fatty acid.

Abstract: A magnetic recording medium, consisting of a base coated with a magnetic coating material, uses as a binder a synthetic resin having a metal sulfonate group and a vinyl chloride-vinyl acetate copolymer containing not less than 8% vinyl alcohol, in which magnetic particles are dispersed. The binder may contain an isocyanate compound as a crosslinking agent for added particle durability.

Abstract: Surface defects in a cured, molded thermoset fiberglass reinforced (FRP) part can be repaired by filling the defect or void with an excess of a thermosetting conductive repair material, applying pressure and heat sufficient to cure said material without substantial shrinkage of said material, removing the pressure, cooling and finishing said parts to the original surface contour.

Abstract: A dimensionally-recoverable article which is particularly suitable for the manufacture or repair of cable harnesses has a dimensionally-recoverable portion formed from a material comprising a crosslinked segmented polyether-ester block copolymer and an adhesive portion comprising a polyether-ester random copolymer which portions are bonded together to form a single integral structure.

Abstract: An ultraviolet-curing composition comprising an ultraviolet-curing resin having active OH group or COOH group, a vinyl monomer, a thickening agent and a photo-sensitizer. A prepreg sheet containing the composition. A metallic material having anticorrosive coating which comprises a metallic material coated with a coating material mainly comprising petrolatum and further with another coating material mainly comprising the above composition. A metallic material having an anticorrosive coating which comprises a metallic material on the surface of which a rust-proof paint layer is provided and the surface of which layer is further coated with a coating material mainly comprising the above composition. The above composition and prepreg sheet are useful for the lining of metallic members of frame-work and structures.

Abstract: A magnetic recording medium having a substrate coated with a magnetic layer comprises a magnetic powder and a binder, essentially consisting of 40 to 80 wt. % of a polyester resin, 60 to 20 wt. % of a nitrocellulose impregnated with vinyl chloride-vinyl acetate copolymer as a protective component and a polyisocyanate.

Abstract: The high solids coating composition contains at least 40% by weight of a binder of film-forming constituents in which the constituents are of(1) an acrylic polymer of styrene or methyl methacrylate or mixtures thereof, an alkyl acrylate or an alkyl methacrylate and a hydroxyl alkyl acrylate or methacrylate(2) a polyester polyol and(3) an alkylated melamine formaldehyde crosslinking agent and optionally, an acid catalyst;the composition is particularly useful as a primer or an exterior finish for automobiles, trucks, airplanes and can be used as an appliance finish and for coil coatings.

Abstract: A process of producing reinforced laminates from crosslinkable thermoplastic olefin polymer material. In the process, a normally solid, high molecular weight crosslinkable thermoplastic olefin polymer containing a catalyst which reacts with and effects crosslinking of the polymer and which has a decomposition temperature above the melting temperature of the polymer, is heated to a molten state at a temperature above the polymer melting temperature but below the catalyst decomposition temperature. A continuous nonreinforced sheet is then formed from the molten polymer at a temperature below the decomposition temperature and is applied to at least one surface of a substrate to form a laminate. The laminate is then heated under pressure to a temperature above the decomposition temperature of the catalyst to effect substantially complete crosslinking of the polymer and is cooled to a temperature below the polymer melting temperature to a self-supporting state to fix the shape of the laminate.

Abstract: To improve adhesion of a hydrophilic photographic emulsion to a hydrophobic polyester film base the latter is energy-treated as by electrical discharge or flame treatment, and then given a sub-coating composed of an aqueous dispersion of a copolyester modified with a sulfonated aromatic compound.

Abstract: Conductor-clad composites are advantageously fabricated using molding compounds and associated processing techniques. The conductive cladding is applied and bonded to the composite during the molding process. The conductor-clad composite may be used as printed wiring board, and in this embodiment results in improved physical, chemical, mechanical, and electrical properties.

Abstract: In a dynamoelectric machine having a stator assembly of coil windings and a core, a heat-dissipating, uninflammable, electro-insulative housing encapsulates the coil windings and the core. The housing is made of a cured molded article or material formed of a resin-filler composition which comprises a liquid unsaturated polyester resin, a finely divided calcium carbonate powder, an inorganic mineral particulate having a particle size larger than that of the calcium carbonate powder, a chopped glass fiber and an aluminum hydroxide powder, wherein the ratio by weight of the calcium carbonate to the mineral particulate is 0.3 to 4, the ratio of the weight of glass fiber to the total weight of the composition is 0.05 to 0.25, the ratio of the weight of the polyester resin to the total weight of the composition is 0.1 to 0.4, the weight ratio of the calcium carbonate powder, the mineral particulate and the glass fiber to the total weight of the composition is 0.15 to 0.

Abstract: Stampable sheet of reinforced thermoplastic material having a plurality of layers of polymeric material and a plurality of layers of fibrous reinforcing material alternating with the layers of polymeric material, the polymeric material layers having minimum crystallization half-times upon heating of one minute or less with the fifth layer of the sheet being polymeric material having a shrinkage of less than 2% as determined in accordance with ASTM Method D-955, and the first or outer layer and the third layer of the sheet being polymeric material layers having about 5 to about 50 weight percent fillers; with all of the layers being integrally formed together and possessing a smooth surface, essentially free of fiber "read-through", and having more uniform reinforcement in the sheet, and of the type required of exterior automotive-type appearance parts; and a stamped sheet formed from the stampable sheet and having a heat deflection temperature under 264 psi. load greater than T.sub.m -50.degree. C., where T.

Abstract: Stampable sheet of reinforced thermoplastic material having a plurality of layers of polymeric material and a plurality of layers of fibrous reinforcing material alternating with the layers of polymeric material, the polymeric material layers having minimum crystallization half-time upon heating of one minute or less and the polymeric material layer inwardly of the outer polymeric material layers and contiguous to a surfacing mat layer having a shrinkage of less than 2% as determined in accordance with ASTM Method D-955; with all of the layers being integrally formed together and possessing a smooth surface, essentially free of fiber "read-through", and of the type required of exterior automotive-type appearance parts; and a stamped sheet formed from the stampable sheet and having a heat deflection temperature under 264 psi load greater than T.sub.m -50.degree. C. wherein T.sub.m is the melting point of the outer layers of the sheet.

Abstract: An adhesive consisting comprising an alkoxyphenol derivative/resorcin derivative/formaldehyde cocondensate has a high adhesive strength and can bond firmly polyester fibrous material with rubber.

Abstract: A process for preparing a resorcinol copolymer, comprising at least one specific phenol with formaldehyde at a certain mole ratio to obtain a resol-type precondensate containing 1 to 30% of residual unreacted formaldehyde and then adding said resol-type precondensate to a mixture of an acid catalyst and at least one resorcinol to effect co-condensation. The obtained copolymer is useful for an adhesive for polyester fiber and rubber.

Abstract: An adhesive comprising a cocondensate of formaldehyde with m-alkylphenol or its derivative and alkylresorcin is excellent in the adhesion, heat resistance and flexibility and can bond firmly polyester fibrous material with rubber.

Abstract: An electrical laminate comprising layers of a resin impregnated fibrous substrate is disclosed. The resin has a glass transition point from about 20.degree. C. to 80.degree. C. and comprises a cured product of a mixture of an unsaturated polyester polymer and a cross-linking monomer. The laminate exhibits an improved punchability at a temperature not lower but not 20.degree. C. higher than the glass transition point of the resin.

Abstract: An electrical laminate comprising layers of an unsaturated polyester resin-impregnated fibrous cellulosic substrate is disclosed. The substrate is preimpregnated with a mixture and/or a condensate of an aminoplast with a higher fatty derivative having at least one functional group capable of condensation with the methylol group of aminoplast. The laminate exhibits improved moisture resistance and punchability.

Abstract: This invention relates to construction panels comprising metal-thermoplastic-metal laminates and a process for preparing same, said laminates possessing in combination critical service properties of high heat distortion temperature, low coefficient of linear thermal expansion, low inelastic ratio, and lightness in weight.

Abstract: The magnetic recording medium contains as a binder a thermoplastic polyurethane resin having a molecular weight larger than about 5,000 and produced by the polyaddition of a long chain diol (A) having a molecular weight ranging from about 500 to 3,000, an organic diisocyanate (C) and a short chain triol (D) having a molecular weight lower than about 500 and specified structures and, as desired, a short chain diol (B) having a molecular weight ranging from about 50 to 500, in specified ratios. The binder may contain a nitrocellulose, a vinyl chloride resin, a polyvinyl butyral, a bisphenol A type polyether or a vinyl chloride-hydroxy carboxylate copolymer as a binder component.The binder provides particularly enhanced heat resistance and solvent resistance with improved dispersibility of a pigment or the like and other resins and favorable compatibility with a solvent or the like.

Abstract: There are obtained laminates of improved fire resistance comprising a substrate of reinforced phenolic resin, directly coated on at least one side thereof with a surface layer of a furan resin, and bonded to the outer surface of the furan resin a "gel-coat" of an unsaturated polyester resin, wherein the furan resin contains boron in sufficient amounts to impart an improved fire resistance to the laminates as compared to the fire resistance of the outer surface gel-coat. The boron is introduced as boric anhydride by use of a substantially anhydrous boric anhydride hardener solution to harden the furan resin.

Abstract: A thermosetting synthetic crosslinking resin containing selected ethers of the reaction product of an isoadipoguanamine mixture and formaldehyde can be incorporated into a variety of coating compositions to provide finishes that are characterized by hardness, flexibility, durability, excellent adhesion, and commercially-acceptable cure temperatures.

Abstract: A high-solids enamel coating on a substrate can give metallic glamor comparable to that imparted by conventional lacquer coatings containing metallic-flakes when the amount of metallic flake pigment in the enamel is increased over conventional amounts with a proportional increase in the amount of chromatic pigments.

Abstract: A molding process, resinous formulations for use in the process, and the resulting products are disclosed characterized in that the product comprises mainly a bulk or fill resinous body having a film or skin of a cross-linked polyester resin formed about the body. Even though the body has intricate curving surface contours, the film is smooth and free of surface tears and blemishes. The product is molded by first spraying formulated, dry particles of a partially cured polyester resin against a hot mold to cause the particles to fuse and flow and form a substantially continuous skin or film on the mold. Thereafter, the bulk resin is added and the mold is heated to cure the polyester resin as well as the bulk resin and to interreact the bulk and polyester resins together to mold the bulk resin with a film of the polyester resin.

Abstract: A composite belt suitable for use as an energy absorber or improved spring in a torque converter said belt having a fixed preformed endless path and at least three sides joined by curvilinear path changing sections, the belt comprises a plurality strands, tapes or films of a copolyetherester elastomer that is oriented in the direction of their length and embedded within a matrix of a lower melting point copolyetherester elastomer that substantively surrounds the individual strands, tapes or films of the oriented copolyetherester elastomer forming a self-supporting structure that does not collapse upon itself when laid on one side of its outside perimeter, said belt when stretched from about 5-30% of the length of its perimeter returns to substantially its original size when force is removed.

Abstract: The film disclosed in the application is secure against forgeries and serves for marking articles, in particular high-quality branded goods. It is comprised of at least one transparent polyester film oriented by stretching and containing in its composition an organic dyestuff which is heat stable at temperatures above about 260.degree. C. Preferably, a laminate is used which is comprised of two films, one of which contains a different colored dyestuff than does the other.

Abstract: A thermosetting coating composition, useful as an automotive finish, has film-forming constituents of a low molecular weight hydroxyl-functional acrylic copolymer, a low molecular weight hydroxyl-functional polyester based on branched-chain glycols, and an aminoplast resin. The composition can be applied at environmentally-acceptable solids levels and cured at commercially acceptable temperatures to form a durable film.

Abstract: There are disclosed thermosettable polyester resins which are the reaction products of specified amounts of a benzenedicarboxylic acid component (e.g.: 1,3-benzenedicarboxylic acid), a trihydroxy alkyl component (e.g.: 2-ethyl-2-(hydroxymethyl)-1,3-propanediol), a short chain alkylene diol component having four or fewer carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 2,2-dimethyl-1,3-propanediol), a dihydroxy alkyl constituent having four to ten carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 1,6-hexanediol), and a monocarboxylic acid component (e.g.: benzoic acid). Such polyesters, having a number average molecular weight of from about 400 to about 1600 and a combined acid and hydroxyl number of about 50 to about 250 milligrams of KOH per gram of polyester, are found to be especially useful in high solids content coating formulations.

Abstract: An FRP molding can be in-mold coated using a one-component peroxide initiated composition of (a) a liquid crosslinkable composition having an average molecular weight of up to about 5,000, having a plurality of polymerizable ethylenic double bonds, being essentially free of active hydrogen atoms or being essentially free of isocyanate groups and (b) a material selected from the group consisting of (I) a polyisocyanate and (II) the reaction product of an excess of equivalents of a polyisocyanate and an ethylenically unsaturated compound having --NH.sub.2, --NH-- and/or OH groups, said reaction product being free of active hydrogen atoms.

Abstract: Lightweight metal-thermoplastic-metal laminates exhibiting an improved combination of good formability and bending strength comprise a core layer of a thermoplastic material selected from certain partly crystalline polyamides and polyesters, and a metal layer of certain aluminum alloys laminated on each side of the core layer, said thermoplastic and metal layers having certain requirements with respect to thickness and tensile elongation, and, additionally for the metal, tensile offset yield strength.

Abstract: An ultraviolet-absorbing amino compound; a paint containing the aforesaid ultraviolet-absorbing amino compound; and a coated article having on its surface a coated film containing the aforesaid ultraviolet-absorbing amino compound are provided. The ultraviolet-absorbing amino compound is produced by reacting (a) a compound having a light absorption maximum within a wavelength region of 300 to 400 m.mu. and containing a mono-, di- or tetra-hydroxyphenyl group, (b) at least one compound containing a amino group and (c) formaldehyde, in the presence of at least one alcohol. The ultraviolet-absorbing amino compound of this invention is used in resin products which undergo photodegradation by ultraviolet light, for example, paints or molded articles of resins, and is especially effective for use in thermosetting synthetic resin paints.

Abstract: A metallized, moulded article, particularly for use as a reflector for a motor vehicle lamp, is formed from a cured, unsaturated polyester resin based thermosetting moulding composition containing, as a curing initiator, an azo compound capable of forming free radicals at the moulding temperature.

Abstract: A glass fiber reinforced resin laminate comprising a cured layer of glass fiber reinforced resin using an unsaturated polyester resin (I) and a surface layer of polyvinyl fluoride formed on at least one of the opposite surface of the aforementioned cured layer, wherein said unsaturated polyester resin (I) comprises (A) 40 to 80% by weight of an unsaturated polyester derived from an acid moiety containing 20 to 90 mol% of at least one member selected from the group consisting of .alpha.,.beta.-unsaturated polybasic acids and anhydrides thereof and a polyhydric alcohol moiety containing 10 to 40 mol% of diethylene glycol and (B) 60 to 20% by weight of an ethylenically unsaturated monomer containing an amount falling within the range of 0.1 to 0.6 mol, based on mol of the diethylene glycol used in the derivation of said unsaturated polyester (A), of an acrylic ester or methacrylic ester, and, on being cured, exhibits a refractive index within the range of 1.50 to 1.56 at 25.degree. C.

Abstract: A reservoir for an electric kettle is defined by a dome shaped shell and a planar inner bottom, which are fastened together mechanically having a room temperature vulcanized silicone rubber filler located therebetween to act as a seal. The shell is skirted by an inwardly projecting annular lip and has an inwardly projecting annular shoulder parallel with and spaced from the lip. The inner bottom is bounded by a downwardly extending annular flange, the top edge of which abuts the bead and the bottom edge of which engages the lip. The form of the kettle components permits the interior of the shell to be coated between the lip and shoulder with an annular coating of the silicone rubber whereat the inner bottom is readily snapped into position in the shell during assembly of the kettle.

Abstract: Coating compositions comprising an unsaturated oil modified resin and an unsaturated melamine condensate. The unsaturated melamine condensate is a condensate of a methylolmelamine, an acrylamide, an ethylenically unsaturated fatty acid amide and optionally a C.sub.1 to C.sub.10 alcohol, wherein the methylolmelamine has at least about 5 methylol groups per melamine ring, wherein substantially all the methylol groups are condensed with the acrylamide, the unsaturated fatty acid amide or the alcohol, wherein the number of the acrylamide moieties of the condensate is in the range of about 1 to about 4 per melamine ring and the number of unsaturated fatty acid amide moieties is in the range of about 0.5 to about 2 per melamine ring, wherein the ratio of the acrylamide moieties to unsaturated fatty acid amide moieties is in the range of about 1:1 to about 3:1.

Abstract: A magnetic recording medium made by coating a base with a magnetic coating material which is a dispersion of magnetic particles in a binder of synthetic resins using a polyfunctional aromatic isocyanate as a curing agent, characterized by the addition of a sorbitan stearate type surface active agent which has a sorbitol derivative in the hydrophilic group. The present magnetic recording medium has superior mechanical properties, especially a superior running quality as well as superior electromagnetic properties.

Abstract: Air drying compositions comprising an unsaturated oil modified resin and an unsaturated condensate of an alkoxy-methylmelamine, an allylic alcohol and an acrylamide. The unsaturated melamine condensate contains allylic and acrylamide moieties in the ratio of about 3:1 to about 1:3, at least about 0.75 allylic moieties and no more than about 3 acrylamide moieties per melamine ring and a total of allylic and acrylamide moieties in the range of about 2 to about 4 per melamine ring.

Abstract: A process for the coating of glass surfaces to prevent the strewing of glass particles in case of bursting, with a transparent duroplastic protective layer of more than 50 microns, which comprises first treating the clean glass surface with an aqueous or alcoholic silane skim coat, drying the treated surface, and then coating the dry surface with a mass of aliphatic or cycloaliphatic diisocyanates or mixtures thereof, or their reaction products with water in a mole ratio of 2:.ltoreq.1 and a mixture of hydroxyl-group-containing compounds comprising40-80 wt. % trifunctional, hydroxy-group-containing polyesters made of .omega.-hydroxy-carboxylic acids or their lactones with at least four C-atoms, with an average molecular weight of 300 to 1400,15-50 wt. % bifunctional, hydroxy-group-containing polyesters made of .omega.-hydroxy-carboxylic acids or thier lactones with a least 4 C-atoms with an average molecular weight of 400 to 2000 and2.5-20 wt.

Abstract: The present invention relates to the method of producing an interface that intimately bonds to common molding compounds; even though they contain mold release agents. The method utilizes a material at the surface of the molded part that bonds to the surface of the part but not to the steel mold. This not only permits the molding of an article using common industry techniques but more importantly the subsequent postmolding of a pigmented or protective resinous coating on one surface of a molded article. The method eliminates the need for special surface preparation such as sand blasting, scuff sanding, etc., to facilitate bonding of a secondary coating.

Abstract: A liquid coating composition comprises the following ingredients A, B and C dissolved in the following weight proportions in an organic solvent:A. A non-oxidizing oil-free cross-linking alkyl resin containing free carboxylic acid groups, 20-60%,B. An alkylated amino-formaldehyde resin, 15-60%C. A vinyl chloride/vinyl acetate copolymer which contains free primary hydroxyl groups, free carboxylic acid groups or oxirane groups, 5-50%The composition is particularly suitable for application to flexible PVC sheet, and is heat-curable to a film whose adhesion to such sheet does not seriously deteriorate on aging.

Abstract: The invention disclosed is for a method of preparing unsaturated polyester resins containing high amounts of dicyclopentadiene. These polyester resins are useful in curable liquid compositions containing them together with a monomeric copolymerizable component. Such compositions may be used at ambient or elevated temperature, in casting, laminating or molding techniques known to the polyester resin art.

Abstract: A method comprises in-mold coating on a molded thermoset polyester glass fiber substrate an in-mold coating composition at a pressure of from about 25 to 50 p.s.i. and at a temperature not in excess of about 150.degree. F. for from about 2 to 12 minutes, said in-mold coating composition comprising the reaction product of an unsaturated aliphatic fumarate polyester diol, a saturated polyester diol flexibilizer, a cross-linking aliphatic polyol having from 3 to 6 OH groups, a diisocyanate in an amount by weight sufficient to provide from about 50 to 120%, preferably from about 80 to 103%, of the stoichiometric amount of --NCO groups required to react with all of the active hydrogen atoms in the coating composition and an ethylenically unsaturated monomer sufficient to polymerize with and crosslink the unsaturated polyester in admixture with a free radical peroxide initiator, an accelerator for said peroxide initiator and a polyurethane tin catalyst.

Abstract: This invention relates to a structural laminate having a plastic surface finish coat laminated to a structural base which has exceptional bond strength between the structural base and the plastic layer with which it interfaces. The structural base comprises a glass reinforced gypsum layer. The plastic laminate portion comprises a plastic surface finish coat, preferably a polyester gel coat or an acrylic resin, bonded to a reinforcing layer of curable polyester or epoxy resin reinforced with glass fibers. The reinforcing layer is adhered to a bonding layer which comprises glass fibers protruding from the reinforcing layer and coated with a limited amount of organic resin such as polyester or epoxy resin. The glass reinforced gypsum layer is applied to the protruding fibers of the bonding layer to form an interface having a bond strength of at least about 150 psi as determined by ASTM C297-68.

Abstract: A water-soluble reactive binder, characterized by a combination of at least three of the components(a) at least one halogen-free polycarboxylic acid compound;(b) at least one salt-forming substance selected from the group consisting of alkali metal, alkaline earth metal and quaternary ammonium salts, organic bases and ammonia;(c) at least one component selected from the group consisting of(c1) a polymer containing OH groups; and(c2) an epoxide compound,wherein the components (a) to (c2) are present as such or at least partially in chemically bonded form, a process for its preparation, an article coated with said binder and an adhesive containing said binder.