Abstract: A rapidly curable phenol-formaldehyde resin is provided in the form of an emulsion which has particular utility in panel board production, particularly waferboard production.

Abstract: A laminate providing a high strength, low flammability improved moisture vapor barrier for use in producing improved construction panels, to the construction panels which comprise a polyurethane foam interior having a top and a bottom laminate skin bonded thereto, and to the process for producing the construction panels. The laminate is composed of an outer metal skin, e.g., aluminum foil, a scrim and an adhesive tie-coat attaching the scrim to the outer skin. The adhesive tie-coat is carefully selected so that it will react during manufacture of the polyurethane foam to produce the panel and tightly bond the foam to the foil. The tie-coat is preferably a high molecular weight, linear epoxy resin adhesive having free hydroxyl groups which react with the isocyanate, or isocyanurate, used in producing the polyurethane foam.

Abstract: A process for producing nonflammable laminated materials which includes the steps of impregnating a cellulose-containing material with an impregnating solution containing a phenolic-resol resin solution, at least one plasticizer for the resin and optionally flameproofing agents, subsequently drying the impregnated material to effect preliminary condensation of the resin and thereafter curing superimposed layers of the impregnated and preliminary condensed material by the application of heat and pressure. The phenol-resol resin solution used contains 50-80% by weight of an ammonia alkaline-condensed phenol-resol resin with a solids content of 65-80% by weight and with a molecular weight distribution determined by gel chromatography of: dimers 20-26%; tri- and tetramers 6-12%; penta- and oligomers 24-36%; expressed in percent per unit area and hexamethylenetetramine in amounts of 1-15% by weight based on the weight of the impregnating solution.

Abstract: The specification discloses noncracking permanent adhesives which utilize mixtures of phenolic resins and methacrylate resins having a Mw greater than about 100,000 and preferably about 400,000 bonding plasticized vinyl resin coverings, e.g., PVC, to hard polymeric substrate surfaces such as ABS, etc. Also, it is preferable that the vinyl resin covering contain plasticizers which are no more than limited in compatibility with the adhesive. It is theorized that the adhesive mixture prevents migration of plasticizer from the plasticizer-containing vinyl resin covering into the adhesive and eventually into the polymeric substrate.

Abstract: Phenolic resins employed in the manufacture of high-pressure decorative laminates are modified by the addition of a partially etherified melamine-formaldehyde resin which is the reaction product of melamine, formaldehyde, an aliphatic polyol and furfural. The modified phenolic resin exhibits better penetration and flow properties and cures more rapidly. Laminates made with this modified resin can be manufactured at lower pressures and without the lengthy in-press cooling step of the prior art. Moreover, the laminates so produced possess enhanced flexibility due to the internal plasticizing effect of the modifier of the present invention.

Abstract: An accelerated melamine-aldehyde resin is made by mixing about 0.001 to about 2% of a free-radical generator into the resin. A laminate is made by preparing a composition of an aldehyde and melamine in a mole ratio of about 1.5 to about 2.0, adjusting the pH of the composition to about 7 to about 9, heating the composition until a sample of it produces a positive hydrophobe in ice water, mixing about 0.001 to about 2% of a free-radical generator and up to about 80 phr of a solvent into the composition, coating paper with the composition to a weight ratio of coated paper to uncoated paper of about 1.2 to about 2.5, drying the composition and partially curing the compositin, stacking the coated paper, and curing the stack under heat and pressure.

Abstract: Rigid-when-wet, but foldable, corrugated paperboard and process of making same by applying phenolic resin to contiguous surfaces of the outer liner, the medium, and the inner liner without substantially altering the hygroscopicity of the exposed faces of the liners, and adhering the three components together before the resin is cured.

Abstract: A melamine-aldehyde resin is disclosed of a composition of melamine-aldehyde, a water-soluble, aliphatic diglycidyl ether, and water. The composition is cured to the A-stage and an absorbent sheet is impregnated with the resin which is then cured to the B-stage. At least one B-staged sheet is stacked with a postformable core stock and heated and pressed to form a C-staged postformable laminate. The laminate can be heated and pressed to postform it. The postformed laminate can be adhesively bonded to a substrate to form a counter top or other article.

Abstract: Production of consolidated overlayed product comprising a core of particulate cellulosic material bound with a polyisocyanate binder and an overlay bound to the core through a phenolformaldehyde resin which forms a barrier inhibiting penetration of the polyisocyanate into the overlay.

Abstract: A base board for printed circuits prepared by the additive process, obtained by heating under pressure a layer comprising at least one sheet of prepreg comprising a thermosetting resin as impregnant and a layer of composition comprising a semi-cured thermosetting resin and a nitrile rubber, said layer of composition being placed on one or both sides of said prepreg layer to integrate said layers as a finished laminate. This base board is used in the additive process for manufacturing a printed circuit board having favorable properties with strong adhesion between the circuit and the base board without showing any warp or twist.

Abstract: Rubber compounds are readily bonded to reinforcing elements, particularly tire cords of glass fibers, using a one-step dip process in which the dip contains an alkaline aqueous dispersion of a mixture of a major amount by weight of a rubbery vinyl pyridine/styrene/butadiene terpolymer and a lignin sulfonate-resorcinol-formaldehyde reaction product. Good adhesion of the cords to a rubber compound are obtained with this process.

Abstract: A rapidly curable phenol-formaldehyde resin is provided in the form of an emulsion which has particular utility in panel board production, particularly waferboard production.

Abstract: The production of a bonded glass fiber product is disclosed. The steps of the method involve forming glass fibers from molten streams of glass; combining the glass fibers with a heat curable aqueous binder composition; consolidating the fibers and heat curable aqueous binder composition into a loosely packed mass on a foraminous conveyor; and curing the heat curable binder composition in situ on the glass fiber product. The consolidated fibers can be compressed on the foraminous conveyor prior to or during curing of the binder composition, or both. The binder composition comprises:1. 60-95 percent by weight of a complex polymeric component formed by reacting phenol, formaldehyde, a modifier selected from the group consisting of starch and compounds which are degradation products of starch, and urea,2. 10-80 percent of urea based upon the weight of the phenol originally charged to produce the polymeric component,3. 0.

Abstract: A patterned, decorative laminate is made by: (1) preparing a core layer, comprising a plurality of fibrous sheets impregnated with a resinous material, (2) placing on top of the core, at least one unfilled kraft paper barrier sheet, impregnated with at least 30 weight percent of an aminotriazine-aldehyde, urea-aldehyde, thiourea-aldehyde or unsaturated polyester resin, (3) placing on top of the impregnated barrier sheet, an unfilled protective sheet, impregnated with an aminotriazine-aldehyde, urea-aldehyde, thiourea-aldehyde or unsaturated polyester resin; the protective sheet having a design printed on the bottom surface facing the barrier sheet, the design covered with colored pigmented material, and (4) heat and pressure consolidating the sheets into a unitary, bonded laminate.

Abstract: A laminate liner adapted to be secured to a supporting surface, which liner comprises in combination: a backing sheet member characterized by a number of relatively large openings therein; a fibrous polymeric sheet material characterized by a number of small openings therein, the fibers composed of a thermoplastic polymeric material having low-friction, self-lubricating properties; and a hardenable resin binder material, the hardenable resin binder material impregnated into the openings of the backing member, and the fibrous polymeric sheet material compressed into the openings of the backing member to form an integral, unitary, laminate liner, the liner characterized by having a low-friction facing surface composed of the polymeric sheet material compressed and bonded to the backing member, and a resin-rich backing surface, the backing surface adapted to be secured by heat pressure to a supporting surface to form a bearing liner.

Abstract: Incombustible materials are bonded together with a self-burning adhesive composition which is a mixture of an organic polymer base structural adhesive as typified by an epoxy adhesive and an oxidizer as exemplified by an ammonium perchlorate powder, so that the bonded materials can be disassembled nondestructively, if desired, by heating the joint to the ignition point of the composition and leaving the composition in the joint to burn self-supportedly until it vanishes.

Abstract: Improvement of the cold adhesion of glue resins, particularly phenoplast and aminoplast wood glues, by the addition of small amounts of a ligninsulfonate.

Abstract: An aqueous alkaline dispersion of a rubbery vinyl pyridine copolymer, trimethylol phenol, and a resorcinol compound, in certain amounts is useful in forming an adhesive for bonding polyamide or nylon cords to rubber compounds or stocks. After dipping the cord in the adhesive dip, the coated cord is heated to dry it and heat cure or heat set the adhesive on the cord. Thereafter, the adhesive containing cord is combined or laminated (calendered) with a curable rubber compound and the resulting assembly is cured. High H-adhesions are obtained with this one-step or single treatment coating dip. It is particularly useful for bonding crystalline polyamides having a large number of aromatic groups in the polymeric structure, e.g., "Fiber B.

Abstract: Method for a unitized valve plate assembly in which a suitable gasket is firmly bonded to one or both sides of a metal plate with the unitized assembly having one or more die-cut holes or apertures therethrough and with the unitized plate assembly being particularly suitable for use as a valve plate unit in automatic transmissions, but having other uses as well.

Abstract: In preparing an epoxy resin laminate sheet by impregnating a nonwoven fabric of glass fiber with an epoxy resin to form a prepreg, laminating a predetermined number of so formed prepregs and pressing, while heating, the laminate, when the nonwoven fabric of glass fiber to be used as a substrate is treated with a liquid mixture containing a water-soluble phenol resin and a silane coupler prior to the impregnation step, a laminate sheet suitable for formation of a printed circuit board can be obtained at a low manufacturing cost. The so formed laminate sheet not only has excellent heat resistance, drilling workability and punching workability at room temperature but also is characterized by such an excellent property that when it is subjected to the boiling water treatment, the degree of reduction of electric properties such as the insulation resistance is very small and whitening of the substrate is not caused to occur.

Abstract: Rubber compounds are readily bonded to polyester reinforcing elements, particularly tire cords of polyester fibers, using a two-step dip process in which the first dip consists essentially of a low molecular weight polyallyl-glycidyl ether in aqueous media and the second dip consists essentially of an alkaline aqueous dispersion of a minor amount by weight of a mixture of a major amount by weight of a rubbery vinyl pyridine copolymer and a minor amount by weight of a heat reactable resinous composition. High H-adhesions are obtained with this process.

Abstract: A fast cured lignocellulosic particle board comprises a hot consolidated laminar mat of lignocellulosic particles. The mat has a middle lamina of particles coated with a fast setting, acid catalyzed, phenol aldehyde thermosetting resin, while the two surface laminae comprise particles coated with a relatively slow curing, alkali catalyzed phenol aldehyde thermosetting resin. The middle lamina is fast curing, but potentially adherent to the metal cauls of the hot press in which the board is manufactured. Although the surface laminae are slower curing, they are nonadherent to the cauls. The net result is a non-sticking particle board curable in the press in about one-half the press time conventionally required.

Abstract: A vulcanizable rubber composition comprising a rubber component, a formaldehyde-donor and a formaldehyde-acceptor, the formaldehyde-acceptor being a co-condensate of formaldehyde with a mixture of resorcinol and a phenol other than resorcinol, or a mixture of a condensate of resorcinol with formaldehyde and a condensate of the phenol with formaldehyde, which is useful for achievement of the excellent adhesion of rubber to reinforcing materials simultaneously with vulcanization.

Abstract: A high temperature tape for use in protecting a structural item to be subjected to high temperature, and the method whereby this novel tape is made are set forth. The tape is principally constituted by a number of elongated carrier fibers disposed in an essentially aligned array, and a large number of comparatively short fibers disposed in a nonwoven manner essentially transversely to the elongated fibers. The short fibers typically extend beyond the confines of the carrier fibers, at least on one side, thus to create a pliable, fringed tape capable of being wrapped for a number of turns about an item to be protected. This wrapping may be done in such a manner that the fringe formed by the short orthogonally placed fibers is available to extend over and cover previous turns of the tape. The fibers are of temperature resistant material, and various means are provided for securing the short fibers to the elongated fibers, including the use of certain resins.

Abstract: This invention relates to a laminated metal-based facing constructed in the manner that a metal sheet as a construction member and a facing veneer of natural wood as a facing member are formed by heating under pressure into one body with nonwoven cloth of nonbinder construction placed therebetween as a medium for an adhesive layer to thereby bond said metal sheet with said facing veneer firmly and to make the sheets thus laminated adapted for bending work, said cloth being impregnated with a thermoplastic resin modified phenol resin adhesive or elastomer modified phenol resin adhesive.

Abstract: A phenolic-aldehyde plywood adhesive containing as an extender a water-insoluble, acid-polymerized lignosulfonate.

Abstract: A ready-to-use phenolic adhesive for the manufacture of plywood containing heat treated spent sulfite liquor solids is described. The spent sulfite liquor solids are heat treated in a dry form until from 20% to 50% of the dry heated solids are insoluble in an aqueous 0.5 molar sodium carbonate solution.

Abstract: A vulcanizable rubber composition which comprises a rubber component, a formaldehyde-donor and a formaldehyde-acceptor in a proportion of 100 : 0.1-10 : 0.1-10 by weight, the formaldehyde-donor being a methylolmelamine condensate containing as a major component 3 to 8 oligomers of a methylolmelamine which the formaldehyde-acceptor being resorcinol or its reaction product with formaldehyde, and is useful for achievement of the excellent adhesion of rubber to reinforcing materials simultaneously with vulcanization.

Abstract: A one-part thixotropic contact adhesive composition comprises a polychloroprene in an organic liquid which is a solvent and/or dispersing medium for it, and from 1 to 10 parts by weight, per 100 parts by weight of the composition, of a thixotropic agent being a solid saturated hydroxy-carboxylic acid or a solid ester of a saturated hydroxy-carboxylic acid.

Abstract: Fibrous mats which are insoluble in styrene are disclosed. The mats comprise a fibrous material and a binder resin which is the reaction product of(a) a first monomer selected from the group consisting of styrene, lower alkyl acrylates, lower alkyl methacrylates, lower alkyl itaconates, lower alkyl maleates, lower alkyl fumarates, vinyl esters, and vinyl chloride;(b) a second monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, acrylamide, lower alkyl acrylamides, N-alkoxy modified acrylamides, diacetone acrylamide, maleamic acid, meleamide, furamide, N-monoalkyl/aryl substituted amides, hydroxyethyl acrylate, and hydroxypropyl methacrylate; and(c) a modifier selected from the group consisting of epoxy resins, melamine formaldehyde resins, and urea formaldehyde resins.

Abstract: A process for bonding steel sheets, e.g., into metallic cans, which comprises applying first a primer comprising 0.1 to 2.5 weight parts of a bisphenol type A epoxy resin having a mean molecular weight of more than about 800, preferably 2000 to 4000, and 1 weight part of thermosetting phenolic resin, which is obtained by heating an aqueous solution comprising phenol, orthocresol and formaldehyde in the presence of a catalyst and reacting them with each other under refluxing conditions, on the surface of the steel sheets, heating the resultant steel sheets, and then bonding the steel sheets with a polyamide, and a primer composition for use in the process.

Abstract: Mixtures of a curable phenolic resin and an organic diaziridine are strong adhesives curable in a relatively short time at moderate temperatures to make strong bonds with wood, metal, and plastics.

Abstract: Adhesive-coated tire cord fabric and similar fabric and single end cords for other end uses can be protected from the adverse effects of atmospheric pollutants, prior to the adhesion of such fabrics to rubber, by incorporating N,N'-ethylene bis-stearamide in the adhesive formulation.

Abstract: Aqueous dispersions of aromatic polyisocyanates blocked with phenolic compounds are prepared by mixing the polyisocyanate dissolved in an organic water-soluble solvent and an aqueous solution containing an excess of the phenolic compound in the presence of an alkali metal hydroxide catalyst. When the phenolic compound is resorcinol, the excess resorcinol in the dispersion may be reacted with formaldehyde to form a resorcinol-formaldehyde resin; when the phenolic compound is phenol, excess resorcinol may be added and formaldehyde reacted with it to form the resorcinol-formaldehyde resin, a polyepoxide and a rubber latex may be also dispersed thus forming a dispersion that may be used to form single dip adhesive coatings on polyester substrates which will adhere to rubber.

Abstract: Halogenated olefin copolymer rubber, particularly halogenated EPDM (prepared by heating the rubber in admixture with an N-haloamide [e.g., 1,3-dichloro-5,5-dimethyl hydantoin or N,N'-dichloro-p-toluene sulfonamide]) is blended with curatives (sulfur, accelerator) and a resorcinol-aldehyde condensation product in which the aldehyde has 2-4 carbon atoms (e.g., acetaldehyde) to make a vulcanizable adhesive for nylon textile. Nylon fabric coated with the composition is useful for making air bags (passive restraints for automotive vehicles). The adhesive is also useful for making nylon-reinforced tires, hose, etc.

Abstract: This invention provides an adhesive composition for use in flexible printed circuits, comprising a phenol-formaldehyde resin, a polyepoxy compound, an acrylonitrile-butadiene copolymer and/or a polyvinylacetal resin, and a styrenic copolymer containing as structural units maleic anhydride and/or an alkyl maleate. Being excellent in adhesive strength, flow property, rapid curability, and heat resistance after curing, the present composition is especially suitable for the continuous bonding of insulating plastic films, particularly a polyimide film, to conductor foils by use of a roll-laminator and gives heat-resistant metal-clad laminates excellent for flexible printed circuits which can be soldered at high temperatures.

Abstract: An elastomer-based heat sealable adhesive composition and method of making the same having an improved balance of physical and chemical properties including improved peel adhesion, tack, and creep resistant characteristics, together with the capability to selectively vary such characteristics. The composition is adapted for formation in situ on a substrate by the chemical formation of an elastomer base material in the presence of a compatible resin material. The elastomer material comprises the reactive product of a reactive component and a coreactive component with the reactive component, including a liquid diene telechelic polymer material and with the coreactive component including an organic coreactive material which is capable of reacting with the diene telechelic polymer material.

Abstract: A process is provided for bonding otherwise incompatible resin systems to form laminated resinous articles. A first resin layer is coated with a solvated coating which forms a surface solution with the surface of the first layer. Thereafter, a second resin layer is bonded to the coating. The coating contains a butadiene resin, a portion of the resin used in the second layer, and curing agent for the resin. The process is particularly adapted to bonding polyvinyl chloride pipe cores to epoxy-impregnated glass fiber overwrap to form improved laminated plastic pipe.

Abstract: A phenolic plywood adhesive containing lignosulfonates and a trialkyl phosphate having alkyl substituents of from 1 to 6 carbon atoms for use in a curtain coater is described.

Abstract: Improved lignocellulosic particleboard, hardboard, and plywood are produced using a lignin sulfonate-phenol formaldehyde glue system. Preferred products are secured by using Douglas fir chips in combination with a unique technique of blending the lignin sulfonate with a phenol and formaldehyde. A specific technique is to react lignin sulfonate with formaldehyde under influence of caustic and heat and then to react the resulting compound with phenol formaldehyde resin to secure a more effective final glue system.

Abstract: A process is provided for bonding otherwise incompatible resin systems to form laminated resinous articles. A first resin layer is coated with a solvated coating which forms a surface solution with the surface of the first layer. Thereafter, a second resin layer is bonded to the coating. The coating contains a butadiene resin, a portion of the resin used in the second layer, and curing agent for the resin. The process is particularly adapted to bonding polyvinyl chloride pipe cores to epoxy-impregnated glass fiber overwrap to form improved laminated plastic pipe.