Abstract: The invention relates to a binder composition comprising a low molecular weight resole resin in combination with boron compounds wherein said boron compounds are present in from about 1 to 30 parts per 100 parts by resole resin solids, said composition having a pH of about 2-6 and said resole having a viscosity of from about 5 to 5000 cps. Said binder provides laminates having superior electrical and flame retardant properties.

Abstract: The invention relates to a resin binder composition comprising, in combination, a resole resin and a metal salt curing accelerator providing a binder composition that has an improved cure rate in electrical grade laminates without adversely affecting electrical properties. The binder composition provides low viscosity for impregnation and accelerated curing rates for advancing the impregnated substrate prior to laminating and final curing.

Abstract: A colored decorative plastic laminate is made from a core layer and a superimposed decorative layer comprising: a fibrous material, coloring particles having a Moh's hardness of up to about 6 and an average particle size range of between about 53 to 210 microns, and thermoset resin; where the weight ratio of fiber material:coloring particles is from about 1:0.04 to 1:0.4 and the colored decorative layer is characterized in that the pigments are dispersed only through the bottom two-thirds of the colored layer and concentrated in the colored layer near the core-decorative layer interface, the top one-third of the colored layer containing substantially no pigment particles.

Abstract: A thermosetting resol-type resin, particularly suitable in varnish form in a solvent for laminating, is produced by reacting a blend of a tar acid and a resinous product of reacting an oxygen-containing naphthalene-formaldehyde resin with a phenol, with formaldehyde in the presence of ammonia.

Abstract: A laminated material comprises a substrate material containing resin-impregnated layers, a metal foil disposed on said substrate and an arc-retardant layer arranged between the metal foil and the substrate material. The arc-retardant layer is an arc-retardant, crosslinked heat-stable synthetic resinous material consisting of from about 60 to 100% by weight of a heat-stable resin which is free of aromatic groupings or heterocyclic rings containing at least one heteroatom and conjugated double bonds and which is not converted to a graphite-containing structure upon being thermally decomposed.

Abstract: Disclosed herein are decorative laminates meeting N.E.M.A. standards which have high impact resistance, flexural strength, and low water absorption qualities suitable for surface veneering wherein the core stock paper is made from 10% to 100% of newspaper or newsprint pulp which in the preferred practice of the invention is substituted for either the pine portion of the core sheet or the hardwood portion.

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: Intumescent amine-aldehyde copolymer compositions having improved UV stability are obtained by incorporating about 0.5-75% by weight of a polyol polyacrylate or polyol polymethacrylate into an intumescent composition comprising a low molecular weight, water-insoluble amine-aldehyde copolymer consisting essentially of repeating units which correspond to the formula: wherein Q is the residue of an alkanal containing 1-5 carbon atoms and R is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, halo, nitro, acetamido, or sulfonamido. The preferred compositions are those in which the amine-aldehyde copolymer is a sulfanilamide-formaldehyde copolymer and the polyol ester is a liquid ester.

Abstract: The addition of polyvinyl acetate to the core stock impregnating resin solution makes possible the preparation of relatively thin but yet strong plastic laminates which are also characterized by ready adhesion with contact adhesive without preparatory sanding and with only light sanding or roughening using less expensive adhesives. The materials so treated are also non-blocking.

Abstract: Novolak-type resins are prepared by phenolating a toluene-formaldehyde resin of oxygen content 4 - 18% and the product is reacted with hexamine to give a higher softening point of not less than 60.degree. C. The resins may be dissolved in a solvent to form a varnish; such varnishes can impregnate sheet material and laminates of good water resistance and electrical properties can be formed therefrom.

Abstract: A high pressure laminate comprising an overlay sheet impregnated with a melamine resin, and an unimpregnated decorative sheet of fibrous cellulosic material, a thin resin coating on preferably the backside of said decorative layer, and a core comprising a multiplicity of sheets of cellulosic material impregnated with a phenolic resin.

Abstract: A release paper which is particularly useful in platen press applications and in the casting of self-supporting films which comprises a fibrous base having a coating thereon derived from an aqueous coating composition containing a release agent, a monomeric polyhydric alcohol and a cross-linkable, thermosetting resin.

Abstract: A heat printing sheet is prepared by coating a base with a molten printing composition which comprises 10 - 60% by weight of at least one tackifier selected from the group consisting of terpene resins, hydrogenated cyclopentadiene resins, cumarone-indene resins, phenol resins, styreneolefin copolymers, .alpha.-methylstyrene-vinyltoluene copolymers, rosins, polyol esters, hydrogenated rosins, hydrogenated rosin-polyol esters and rosin; 5 - 50% by weight of at least one wax selected from the group consisting of plant wax, petroleum wax, coal wax, synthetic wax; 10 - 60% by weight of an ethylene-vinyl acetate copolymer which contains 5 - 50% by weight of a vinylacetate component and which has a melt index of 4 - 1000 g/10 min, 5 - 40% by weight of a filler which is bendable with said tackifier, wax or ethylene-vinylacetate copolymer; and a pigment.

Abstract: High yield resin saturable papers containing total lignin, based on paper weight, in amounts from about 8 up to 15 percent are employed as core stock for high pressure decorative melamine laminates. At least 65 percent of the fibers should be hardwood fibers. Up to 35 percent of softwood fibers may be present but then the softwood lignin, based on paper weight, should not be greater than about 2.8 percent.

Abstract: A relatively uniform thin coating of a solid phenolic reactant can be applied to a paper base by contacting said paper base with a thin film of a solution consisting essentially of said phenolic reactant in a volatile organic solvent and immediately evaporating said solvent and, unexpectedly, said phenolic reactant is retained essentially completely on the contacted surface of the paper base. Thusly applied, it has been found that well defined colored marks are formed on the surface of the paper base on marking the surface with a colorless marking ink.