Abstract: Sealing process for surface pores of construction parts, particularly parts in the form of cover plates and/or face plates, both prefabricated and made form natural rock, comprising: application of a curable resin powder on the surface of the parts to be treated, introducing the excess resin powder into the pores to be sealed; and proceeding to cure the resin powder contained inside the pores.

Abstract: A layered material consisting of a substrate of heat-sensitive material, preferably wood, and a powder paint coat applied thereon, characterized in that it is obtained by a) optional application of an extender coat, b) optional application of at least one (water-based) paint, c) heating of the substrate by microwave irradiation, d) optional hardening of the liquid paint, preferably by ultraviolet irradiation, e) application of the powder paint, preferably by electrostatic spraying or by the Tribo process, f) heating of the powder paint to sintering temperature, g) subsequent hardening of the paint coat.

Abstract: Method for on-mold surface coating fiberglass-reinforced molded articles during their manufacture with environmentally friendly and physiologically safe thermosetting unsaturated polyester on-mold coating powders which serve as replacements for liquid gel coats. The thermosetting coating powders employed are adapted to cure at low temperatures to avoid causing thermal damage to the heat sensitive plastic molds which must be reused over and over again, and to cure in the presence of atmospheric oxygen to enable over coating with liquid fill resins and fiberglass, which constitute the bulk of the finished article, without having the fill resins bleed through the powder coating film and detrimentally affect the overall quality of the surface finish.

Abstract: A process for rotolining a cylindrical article is provided, wherein the rotolining powder contains both fluoropolymer and filler and has a particle size of 70-1000 micrometers, and the cylindrical article (surface being lined) is rotated at a speed of at least 100 m/sec2 while heating the powder to press the powder against the surface being lined to thereby form the lining.

Abstract: There is disclosed a method and composition for cosmetically repairing a surface void in polyolefin objects. The method involves inserting a repair composition into the void and then applying heat thereto to fuse the repair composition with a surrounding portion of the polyolefin object. The repair composition is a physical mixture of a thermoplastic powder, a resin binder, and a solvent, having a paste-like consistency. The repair composition may be neutral in color, or may contain a colorant to closely match the underlying object. The heating step can be performed with an open flame or with a heat gun.

Abstract: The present invention provides a thermal transfer image-receiving sheet with a dye receiving layer formed from a powder composition, the thermal transfer image-receiving sheet having a dye receiving layer which gives high-quality transfer images and has satisfactory printing sensitivity, as well as production process whereby the thermal transfer image-receiving sheet can be consistently obtained; the thermal transfer image-receiving sheet 1 has a dye receiving layer 3 formed from a powder composition composed mainly of a dye-tingible resin on a base 2 made of a paper, and the dye receiving layer 3 is formed to a substantial thickness of 7 &mgr;m or greater.

Abstract: Process for the at least partial direct coating of an extensible backing material with a pressure-sensitive adhesive composition, the backing material being guided by a transporting apparatus against a coating apparatus in such a way that the coating apparatus applies the pressure-sensitive adhesive composition to the backing material, characterized in that the coating apparatus is abhesively treated.

Abstract: A method for making a self locking internally threaded fastener and an apparatus for making such fasteners, in which the self locking characteristic is derived from a patch of thermoplastic material having a circumferential extent of less than 360° adhered selectively to at least a portion of the thread defining surface of the fastener.

Abstract: A pressure relief device comprises an unimpregnated graphite membrane having a gas impermeable coating.

Abstract: A method is provided for washing, drying, applying a curable coating, and effecting the cure of such coating on a variety of substrates, such as metal, for example steel, plastic and wood. A particularly effective drying procedure based on the generation of a dehumidified and filtered air stream directed substantially parallel to the wet substrate allows for a significant decrease in drying time while maintaining coating effectiveness.

Abstract: This invention relates to a powder-coating composition made from at least two components comprising: (a) a film-forming resin composition; and (b) a transfer efficiency-enhancing amount of at least one additive compound comprising a 5- or 6-membered ring, the ring atoms of the ring comprising at least two heteroatoms; one heteroatom being nitrogen, the second heteroatom being selected from the group consisting of nitrogen, oxygen, and sulfur; said compound having at least one hydrocarbyl substituent of 1 to about 50 carbon atoms; wherein component (B) is incorporated into the powder coating composition by addition of component (B) to an extruded composition comprising components other than component (B). The invention also relates to a method of coating a substrate using the foregoing powder coating composition.

Abstract: A coated substrate comprising: (a) a substrate; (b) a primer layer containing adhesion-promoting polymer on said substrate; and (c) at least one topcoat of a permeation resistant composition of ethylene-tetrafluoroethylene (ETFE) copolymer and mica, therein the ETFE is a copolymer of about 40 to 60 mole % ethylene and about 60 to 40 mole % tetrafluoroethylene, wherein the mica is present in amounts of about 3 to about 25 wt % based on the ETFE and mica, and wherein the topcoat having a thickness of at least 150 &mgr;m. The coated substrate is formed by applying the primer to the substrate and drying, followed by dry powder coating at least one layer of ETFE and mica composition, followed by heating said layer.

Abstract: Paint compositions and coatings having improved overall visual appearance, richness or depth of color and aesthetic properties such as for spray-painting automobiles, boats, aircraft and home appliances. The present paint compositions are high solids content, heat-curable, transparent or translucent compositions containing embedded light-refractive colorless and/or tinted transparent glass beads preferably between about 10 to 20 microns diameter, and one or more color-enhancing agents such as pigments, dyes, aluminum flakes, mica, opaque glass beads, holographic flakes, and similar conventional light-enhancing agents. The present bead-containing refractive paint compositions may be based upon volatile organic solvents, water or may be solvent-free powder compositions, but in all cases the resinous binder material is cross-linkable at the baking temperature of the paint, or upon exposure to ultraviolet radiation, to cure as a hard, translucent, chip-resistant paint.

Abstract: Method of coating metal strips, preferably made of steel or aluminum, by applying a powder coating, cleaning, and baking, where

Abstract: A process of forming coatings on substrates by applying a layer of curable materials in dry powder form and then melting and curing the material is improved by compressing the layer using a flexible confining membrane. Less material is required to provide equivalent barrier protection and surface finish. The process is particularly applicable to applying dry powder coatings on temperature sensitive substrates, such as medium density fiberboard, in press apparatus, such as a membrane press, which have not commercially used dry powder coating materials previously.

Abstract: Pigmented powder coating products based on low melting point fluorine-based terpolymers, preferably on those made from a majority of vinylidene fluoride copolymerized with tetrafluoroethylene and hexafluoropropene, are capable of providing coatings with controllable gloss properties. The process for preparing coatings from the powders is essentially characterized by the selection of the temperature at which the desired gloss can be obtained, from low to high, without degradation of the mechanical properties.

Abstract: A water based coating composition which does not require a primer for application over wood, masonry, metal, vinyl siding and previously painted surfaces and can be applied over these surfaces in a single coat to provide the tannin blocking, hiding, corrosion resistance and durability of a conventional primer plus two coats of latex paint.

Abstract: A method of powder coating at least one surface of a non-conductive object having a plurality of sequential steps. The first step is pretreating the surface of the non-conductive object to ensure that the surface is suitably cleaned. The second step to apply a sufficient quantity of moisture on the surface of the non-conductive object to facilitate adhesion of a powder coating to the surface. The next step is to spray a polymer coating powder on the moistened surface of the non-conductive object. This spraying step is done immediately following the application of moisture but prior to a complete evaporation of the applied moisture. The fifth step is to evaporate any remaining applied moisture from the non-conductive object prior to curing. The last step is to cure the coating on the surface of the non-conductive object without decomposing the powder and then either cool or allow the non-conductive object to cool naturally.

Abstract: The invention discloses a metallic coating method which is characterized by applying a dispersion formed by dispersing aluminum flakes which have been surface-treated with a C8-C18 alky ester of phosphoric acid in an organic solvent, onto an uncured coated surface of a paint-coated object, then applying onto the dispersion-applied surface a clear paint, and thereafter simultaneously curing these coating films under heating. According to this method, the aluminum flakes are oriented in parallel with the coated surface, enabling to form a metallic coating film which is white and excels in metallic luster (glittering effect) and furthermore exhibits strong flip-flop properties.

Abstract: A method is provided for washing, drying, applying a curable coating, and effecting the cure of such coating on a variety of substrates, such as metal, for example steel, plastic and wood. A particularly effective drying procedure based on the generation of a dehumidified and filtered air stream directed substantially parallel to the wet substrate allows for a significant decrease in drying time while maintaining coating effectiveness.

Abstract: The present invention is directed to a polymeric prosthesis precoated with a bone cement compatible polymer. The bone cement compatible polymer coating, is provided by an activated powder mixture of polymethyl methacrylate and ultra high molecular weight polyethylene which is bonded to the outer surface of the prosthesis by sintering. Once bonded to a polymeric prosthesis in accordance with the present invention, the precoat strengthens the interface between a bone cement and a prosthesis when the prosthesis is later implanted. The inner layer of the prosthesis may be provided of cross-linked UHMWPE powder sintered with virgin UHMWPE powder or fibers to provide a intermediate layer(s) of the coating present on the prosthesis. The precoat also decreases the likelihood that the prosthesis will loosen and break away from the cement over time.

Abstract: Cure-on-demand, moisture-curable compositions of one or more compounds comprising molecules having reactive silane functional groups and an acid generating material are taught herein. The acid generating material releases an acid upon exposure to heat, ultraviolet light, visible light, electron beam irradiation or microwave irradiation to initiate and accelerate the crosslinking reaction. Articles prepared using the moisture curable materials are also disclosed, as are methods of curing those materials.

Abstract: Processes for drying primer coating compositions applied to a surface of a substrate are provided in which the primer coating composition, if a liquid or powder slurry, is exposed to low velocity air having a temperature ranging from about 10° C. to about 50° C. for a period of at least about 30 seconds to volatilize at least a portion of volatile material from the liquid primer coating composition. Next, infrared radiation and low velocity warm air are applied simultaneously to the primer coating composition (liquid, powder slurry or powder) for a period of at least about 1 minute during which the temperature of the substrate is increased at a rate ranging from about 0.2° C. per second to about 2° C. per second to achieve a peak substrate temperature of the substrate ranging from about 30° C. to about 120° C.

Abstract: Concrete strengthening members, particularly prestressing tendons such as strands of steel wire, are provided with a strongly adherent plastic coating which may be substantially impermeable for improved corrosion resistance, and/or which may have embedded therein abrasive or grit-form particles to provide improved bond with the concrete, and particularly to provide controllable bond transfer in prestressing tendons of the pre-tensioned type. The plastic coating preferably is applied electrostatically in powder form, and fusion bonded by heat. The abrasive can be applied by spraying during a viscous state of the heated resin, and can be varied as to size and spacing density so as to control the surface condition and the bonding effect. Fusion and curing heat may come from preheating of the member before application of the resin powder, which preferably is a heat curable, thermosetting epoxy. Coating thickness and grit application are readily variable to meet particular requirements.

Abstract: A method for powder spray-coating objects utilizes pneumatic conveyance of powder from an injector to a spraying system having a spray coating zone through which objects are consecutively conveyed in an automated system. Power conveyance is interrupted between the consecutive objects as object gaps enter the spray coating zone while the conveying air flow is maintained by injection of controlling air into a vacuum zone of the injector which reduces the injector vacuum to a degree causing interruption of powder conveyance. Flushing compressed air may be injected between the injector and the spray device of the spraying system to automatically flush powder to maintain system integrity. Equipment for powder spray coating of objects utilizing the above method is also disclosed.

Abstract: A pipe treatment process that is a portable, field-applied, coating process. The process produces a two-layer composite protective coating system with a finished, seamless, chemical bond within its interlayers as well as to adjacent coating materials. The process is suitable for metallic substrates, which may or may not be cathodically protected, and maybe used to coat new or repair previously coated metallic substrates.

Abstract: Fireproof panels, and methods for their construction are provided. The fireproof panels comprise at least one sheet including a layer of glass fibres impregnated with at least one fireproof resin free from solvent. The method for the construction includes the successive steps of distributing a fireproof resin in the form of a powder free from solvents on a layer of glass fibres, subjecting the latter to a first compression and heating step to soften the resin and, to a second compression and heating step to cross-link the resin and form the said panel. The panels find particular use in the production of partitions and furnishings.

Abstract: A process for application of a protective coating to a steel, concrete, or wooden structure so as to provide protection against corrosion, weathering, or other environmental damage in which the surface to be protected is heated to a temperature in a range of about 75.degree. F. to about 150.degree. F. after which a liquid thermoset primer is applied to the heated material in two stages. The first portion is solidified by heating and then coated with a second portion, forming an uncured liquid thermoset outer primer layer. A melted polymer powder layer is then applied by flamespraying over the uncured liquid thermoset primer layer, forming an intermediate polymer powder layer embedded in the uncured liquid thermoset primer layer.

Abstract: A porous composite laminate material comprises a layer (4) of expanded polytetrafluoroethylene (PTFE) membrane, and a layer (2) of non-expanded porous PTFE attached thereto. The non-expanded porous PTFE layer may be a sintered porous PTFE produced by sintering granular-type PTFE particles to form a porous integral network of interconnected particles; and may be produced in situ by spray application onto the membrane followed by baking. Modifiers including unsintered fine powder PTFE, thermoplastic fluorinated organic polymer, a low molecular weight PTFE and mixtures thereof may be included. The expanded PTFE membrane can be in sheet form or in the form of expanded PTFE fibres woven into a fabric. The laminate may be used for oiling and cleaning high temperature fuser rolls in a photocopying machine, or as a filter.

Abstract: A method and apparatus is disclosed for kinetic spray coating of substrate surfaces by impingement of air or gas entrained powders of small particles in a range up to at least 106 microns accelerated to supersonic velocity in a spray nozzle. Preferably powders of metals, alloys, polymers and mixtures thereof or with semiconductors or ceramics are entrained in unheated air and passed through an injection tube into a larger flow of heated air for mixing and acceleration through a supersonic nozzle for coating of an article by impingement of the yieldable particles. A preferred apparatus includes a high pressure air supply carrying entrained particles exceeding 50 microns through an injection tube into heated air in a mixing chamber for mixing and acceleration in the nozzle. The mixing chamber is supplied with high pressure heated air through a main air passage having an area ratio relative to the injection tube of at least 80/1.

Abstract: In substrates, such as wood substrates, having sharp edges, corners and other surface discontinuities, in a front appearance surface, non-functional machining, such as formation of grooves, is performed on the rear non-appearance surface adjacent the surface discontinuities. Coating powder is applied, e.g., electrostatically, to the appearance surface of the substrate and the coating powder fused or fused and cured to form a continuous coating on the appearance surface of the substrate. The rear surface machining reduces cracking of the coating at the front surface discontinuities.In some cases, non-functional machining is distributed over the entire non-appearance surface of the work-piece to promote out-gassing of volatiles to the non-appearance surface, thereby eliminating out-gassing-caused defects in the coating formed on the appearance surface.

Abstract: A thermal transfer-receiving sheet of the present invention comprise a substrate made of a plain paper and a receptor layer formed by applying, on the substrate, a powdery composition containing a dyeable resin. The receptor layer has a coated amount in a range of 6 g/m.sup.2 or more and 22 g/m.sup.2 or less, or alternately has a substantial thickness in a range of 7 .mu.m or more, which is defined by excluding a portion of the receptor layer infiltrating the substrate. A surface of the substrate may has physical properties in which a surface texture is in a range of 471 or less in terms of a roughness index, and a surface roughness is in a range of less than 2.1 .mu.m in terms of an arithmetical mean deviation of profile(Ra), less than 23.2 .mu.m in terms of a maximum height (Rmax) and less than 20.8 .mu.

Abstract: Pulverulent coating compositions exhibiting excellent adhesion to metal substrates are formulated from a polyamide, e.g., nylon 6, nylon 11, nylon 12, or copolyamide thereof, and minor amounts of at least one phenolic polycondensate and/or at least one polyalkyl (meth)acrylate.

Abstract: The powder coating for use in a coating method which includes the steps of mixing and applying two or more powder coatings to a substrate, the powder coating comprising a resin not having thermosetting properties at a temperature of 160.degree. C. or less by itself, and being heat-cured at a temperature of 160.degree. C. or less when used in combination with other powder coatings. The powder coating composition comprising two or more powder coatings, wherein each of the powder coatings comprises a resin not having thermosetting properties at a temperature of 160.degree. C. or less by itself, and being heat-cured at a temperature of 160.degree. C. or less to form a coating film when used in combination with other powder coatings.

Abstract: The powder coating of the present invention was used for a method for forming coatings comprising the steps of making the powder coating adhere to an adhesive layer previously formed on the surface of a material to be coated, and then heating it, thereby forming a coating, comprising a resin particle containing a thermosetting resin, and a particle containing a curing agent.

Abstract: A coating composition which forms a peelable coating for protecting surfaces of an object from the outside elements. The coating composition includes a latex of rubber particles and a UV absorber, wherein the rubber particles are present from about 35 to about 50 weight percent in the coating composition. The coating composition may also include from about 0.5 to about 4 weight percent of an antioxidant; from about 0.003 to about 0.03 weight percent of a biocide; from about 0.03 to about 0.08 weight percent of a defoamer; from about 0.07 to about 0.40 weight percent of a thixotropic agent; and a rust inhibitor, wherein all weight percents are based on the total weight of the coating composition. The method of using the composition includes coating the surface with a layer of the above-described coating composition and allowing the layer of coating composition to dry and form a coating which is capable of being peeled from the object.

Abstract: This invention relates to methods for spraying liquid compositions containing volatile solvent by using compressed fluids, such as carbon dioxide or ethane, to form solid particulates, coating powders, and catalyst materials, which can be produced with narrow particle size distributions and can be sprayed at higher solids levels, in ambient air or with heated air applied to just the spray instead of a spray chamber. Novel catalyst supports can be produced having a beneficial morphology such as for olefin catalysis. Drier water-born coatings can be applied to substrates by using compressed fluids to spray water-born coating compositions having conventional water levels, thereby reducing runs and sags and shortening dry times.

Abstract: The invention relates to a method of coating articles with powder coatings which contain polymers, are applied to the surface of the substrate to be coated, are melted and are crosslinked by UV irradiation, wherein the polymers employed are copolymers ofa) at least one monomer of the general formula (I) ##STR1## where R.sup.1 =H or CH.sub.3 and R.sup.2 =H, C.sub.n H.sub.2n+1 where n=from 1 to 30, or is an alicyclic, araliphatic or heterocyclic radical, hydroxyalkyl, alkoxyalkyl, glycidyl or aminoalkyl,or of the general formula (II) ##STR2## where R.sup.1 =H or CH.sub.3 and where R.sup.3 and R.sup.4 may be identical to or different from one another and are H, CH.sub.2 OH, C.sub.n H.sub.2n+1 where n=1 to 30 or CH.sub.2 OR.sup.5 where R.sup.5 =C.sub.m H.sub.2m+1 where m=1 to 12, andb) at least one copolymerizable, ethylenically unsaturated organic compound of the general formula (A) ##STR3## where R' and R" can be identical to or different from one another and are H, C.sub.p H.sub.

Abstract: Proposed is a thermosetting powder coating composition comprising a mixture of particles reactive towards one another and a catalyst, with a portion of the reactive particles comprising a polymer reacting with epoxy to form ester forming or ether forming groups, while another portion comprises an at least bifunctional cross-linking agent which contains 2-oxo-1,3-dioxolan-4-yl groups, hereinafter referred to as cyclocarbonate groups, and, optionally, epoxy groups, with both the polymer reacting with epoxy to form ester forming and/or ether forming groups and the cross-linking agent being obtained by means of a non-vinylic addition and/or polymerization process. The catalyst used as ring opener for the cyclocarbonate groups is present in a quantity of 0.01 to 10, preferably 0.1 to 5, parts by weight per 100 parts by weight of the mixture of particles reactive towards one another. The quantity of epoxy oxygen present in the cross-linking agent after CO.sub.2 unblocking preferably is at least 0.4 wt. %.

Abstract: A method for obtaining a cured multi-layer coating with good intercoat adhesion, comprising the steps of:a) applying to a substrate a first powder coating composition comprisingi) a polyester resin having a carboxyl functionality of less than two,ii) a crosslinker reactive toward the carboxyl groups of the polyester resin selected from the group consisting of epoxy-functional compounds,wherein the ratio of epoxy groups of the crosslinker to the carboxyl groups of the polyester is between 1.05:1 and 1.9:1,b) applying to the first coating layer at least one additional coating composition comprising a clearcoat includingi) a hydroxyl functional acrylic resin andii) a crosslinker reactive toward the hydroxyl groups on the acrylic resin,c) curing the coating compositions together or sequentially.

Abstract: An apparatus and process for allowing a powder paint system to utilize reclaimed oversprayed powder paint of various colors by collecting it in a common reclaim collector system. The reclaimed powder paint is then applied to a work piece as a base coat to attain a portion of the total film build required. The remainder of the film thickness is then applied in subsequent application of virgin powder paint.

Abstract: A process for coating a fastening member with a hot melt adhesive. The process includes applying adhesive in a solid form such as powder, pellet or a compressed plate of adhesive onto the surface of the fastening member, pressing the adhesive against the adhesive bearing surface of the fastening member, and then heating the adhesive, while it is subjected to pressure, to a temperature high enough to melt the adhesive. In the preferred embodiment heating is accomplished by induction. The fastening members may be preheated to a temperature in the range of 50.degree.-90.degree. to increase the speed of the process.

Abstract: An apparatus for applying powder coating material onto large objects such as automotive, truck or other vehicle bodies includes a powder spray booth defining a controlled area within which to apply powder coating material onto the vehicle bodies, a powder kitchen located at a remote position from the powder spray booth, and, a number of feed hoppers located proximate the booth which receive powder coating material from the powder kitchen and supply it to automatically or manually manipulated powder spray guns associated with the booth. Oversprayed powder coating material is removed from the booth interior by a powder collection and recovery system which transmits the oversprayed powder back to the powder kitchen for recirculation to the powder spray guns.

Abstract: A self locking internally threaded fastener and an apparatus and process for making such fasteners, in which the self locking characteristic is derived from a patch of thermoplastic material having a circumferential extent of less than 360.degree. adhered selectively to at least a portion of the thread defining surface of the fastener.

Abstract: A tube product and improvement in the production of coating tubing includes hot dip galvanize zinc coating of tubing, and before solidification of the zinc coating, clear coating of the tubing with organic polymer coating. The heat of the hot dip cures the clear coating, and the clear coating preserves a consistency and reflectivity of the zinc previously unseen in finished products. In additional preferred embodiments, organic polymer coatings are applied to zinc coated and uncoated tubing, and the organic polymer coatings are applied by electrostatic powder coating.

Abstract: A fluoro-carbon resinous laminate has a crack-resistant surface on a fluoro-carbon resinous layer thereof produced by coating a single surface or both surfaces of a plastic film with a single layer of a fluoro-carbon resinous dispersion, and a method of producing the laminate. To produce the fluoro-carbon resinous laminate, which is a minimum of 10 .mu.m in thickness, a single surface or both surfaces of a plastic film are coating with a single layer of concentration-adjusted fluoro-carbon resinous dispersion and then dried, followed by curing the resinous dispersion in a thermal treating furnace with heated atmospheric air or by adding organic solvent to the resinous dispersion, the enabling production of a fluoro-carbon resinous laminate having a surface appearance in which cracks cannot visually be identified.

Abstract: By depositing a thermoplastic resin powder inbetween the individual fibers of a reinforcing continuous fiber bundle and subsequently applying a solution of a binder resin dissolved in a solvent to the resulting reinforcing continuous fiber bundle, the thermoplastic resin powder is fixed inbetween the individual fibers via the binder resin which concurrently works to bind the individual fibers together. Then, the solvent of the binder resin is substantially removed from the resulting reinforcing continuous fiber bundle within a temperature zone not above the melting point or flow point of the thermoplastic resin powder. In the molding material produced by the method, the individual fibers of the reinforcing continuous fiber bundle, the individual fibers and the thermoplastic resin powder, and the individual thermoplastic resin powders are independently fixed together, all in a pin-point fashion via the binder resin, so the molding material contains substantially no solvent of the binder resin.

Abstract: A method is provided for use with an injector arrangement where particulates are to be entrained in a gas transport medium. The apparatus has a nozzle discharging conveying gas and a secondary, dosing gas flow provided from an annular passage. This secondary flow envelopes the conveying gas. Particulates are drawn into the combined gas streams by a venturi effect.

Abstract: .[.Wood.]. .Iadd.A heat sensitive substrate .Iaddend.is .[.electrostatically.]. coated with a thermosetting powder coating system in which a mixture of a self-curing epoxy resin and a catalyst therefore is extruded and .Iadd.pulverized and .Iaddend.a low temperature curing agent .[.are both.]. .Iadd.a .Iaddend.pulverized and the powders are blended with conventional additives to make a coating powder which is deposited on .[.a wooden.]. .Iadd.the .Iaddend.substrate and heated to cure. The mixture of resin and catalyst does not cure within the extruder but it is made to cure at low temperatures by the separate addition of the curing agent. A small amount of the low temperature curing agent, insufficient to cause substantial curing during extrusion may be used in place of the catalyst.

Abstract: A process is provided for coating a given surface of a heat sensitive metal article (e.g., thermally massive aluminum) with a high-cure-temperatureating-forming-powder. A first oven heating step elevates the metal article's temperature to a predetermined preheat cycle high-limit-of-heat-load-temperature. After a first predetermined period of time, the metal alloy article is withdrawn from the oven. A high-cure-temperature-coating-forming-powder is then sprayed onto the given surface of the metal article. The spraying, comprising first and second spray sequences, is initiated essentially immediately after withdrawal of the metal article from the oven. The first spray sequence is a single group of spray passes that applies a coating layer to fill the pores in the given surface with heat melted high-cure-temperature-coating-forming-powder. The second spray sequence builds up the total thickness of coating.