Abstract: Polyisocyanurate foams are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol blend comprising(a) about 5 percent to about 95 percent by weight of said blend of an alkylene oxide adduct of an aromatic amine of the formula ##STR1## wherein Z is a divalent aromatic radical, x, x', y, and y' each independently have an average value from about 1 to about 5, and each R is independently selected from the group consisting of hydrogen, alkyl or aryl, provided that the adduct is capped with ethylene oxide units, and(b) about 5 percent to about 95 percent by weight of said blend of an aromatic polyester polyol having a molecular weight of from about 150 to about 5,000. Laminates of such foams exhibit a high degree of fire resistance, low foam friability, high compressive strength, and excellent facer adhesion.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.

Abstract: A board having improved thermal and/or acoustical properties is disclosed, together with a method and apparatus for producing same. The board is of finite thickness and has a graduated density, the two opposing major surfaces have the greatest density and the intermediate portion has the least density with the board density gradually decreasing in the region between the major surfaces toward the intermediate portion thereof. The board is produced by a molding process, wherein blankets of loosely gathered fibers and containing a suitable binder, are utilized to form the board. The blankets are preferably high compressible and have interposed therebetween an initially relatively highly incompressible air filled member. These laminates are pressed together between a pair of heated mold halves. As the temperature of the laminate increases, the interposed member softens and is rapidly reduced in thickness due to the escape of air as it softens and melts.

Abstract: A method and apparatus for producing a synthetic board from cellulosic and/or lignocellulosic materials wherein a thermosettable binder, preferably a polyisocyanate binder, is applied through a cooled nozzle to the hot and wet fibrous material in the blow line out of the refiner of a board forming process. Polyphenylpolyisocyanates, such as a mixture of diphenylmethane-4,4'-diisocyanate and polymethylene polyphenyl polyisocyanates, are a particularly suitable binder.

Abstract: Polyoxyalkylene foam stabilizing surfactants can be prepared by reacting a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid under free radical polymerization conditions in the presence of a free radical initiator, and by subjecting the reaction product obtained to a solvent extraction. The isolated components can be utilized as surfactants in producing cellular foams.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.

Abstract: A stopping for use in improving underground mine ventilation comprising an assembly of wall elements, said wall elements comprising:(a) a plurality of rigid blocks, and(b) a plurality of compliant sealing members. The rigid blocks and compliant sealing members are combined in courses to form a wall which extends over substantially the entire cross section of a tunnel being stopped, the sealing members being interposed between and/or around the rigid blocks in a uniform or nonuniform arrangement throughout the extent of the wall so as to (i) accommodate convergence loads imposed on the wall, and (ii) form, together with the rigid blocks, a barrier against the flow of gas through the tunnel.

Abstract: Polyisocyanurate foams are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol blend comprising(a) about 5 percent to about 95 percent by weight of said blend of an alkylene oxide adduct of an aromatic amine of the formula ##STR1## wherein Z is a divalent aromatic radical, x, x', y, and y' each independently have an average value from about 1 to about 5, and each R is independently selected from the group consisting of hydrogen, alkyl or aryl, provided that the adduct is capped with ethylene oxide units, and(b) about 5 percent to about 95 percent by weight of said blend of an aromatic polyester polyol material having a molecular weight of from about 150 to about 5,000. Laminates of such foams exhibit a high degree of fire resistance, low foam friability, high compressive strength, and excellent facer adhesion.

Abstract: A building structure comprising a corrugated protective layer having crests and valleys, a plurality of rigid metal securement strips applied over the corrugated protective layer, an outer weather-resistant covering applied over the rigid metal securement strips, and connecting means for securing said building elements together. A layer of insulation may be included between the rigid metal securement strips and exterior weather-resistant covering. The outer weather-resistant covering, the layer of insulation, and the metal securement strips can be secured to the corrugated protective layer without disturbing the preexisting structure.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.

Abstract: Polyoxyalkylene foam stabilizing surfactants can be prepared by reacting a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid under free radical polymerization conditions in the presence of a free radical initiator, and by subjecting the reaction product obtained to a solvent extraction. The isolated components can be utilized as surfactants in producing cellular foams.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting a polyoxyalkylene adduct and an esterified unsaturated dibasic acid in the presence of a free-radical initiator.

Abstract: The present invention is directed to a novel cover member for insulation boards and a novel method of installing such boards in which said cover member is generally of inverted T-shaped configuration with an added strip extending outwardly from the vertical web of said cover member to confine one edge of an insulation board. The method of installation is a progressive step method, using the novel cover members of the invention.

Abstract: A method for producing a decorative design on a substrate by applying to the substrate an embossable coating comprising a filler, a binder, a release agent, a moisture control agent, and a liquid; drying the applied coating to remove a major portion of the liquid therefrom, sufficient liquid being retained to make the coating pliable and readily impressible by an embossing means; and subjecting the pliable coating to pressure contact with the embossing means, which is at ambient or an elevated temperature, to impress a decorative design into the coating; and the embossed coated substrate produced by the method.

Abstract: A process for producing a structural laminate comprising the steps of providing a composite article comprising a facing sheet adhered to a thin, substantially incompressible yet expansible mat of long, layered glass fibers, applying a foam-forming mixture to the glass fibers, positioning a second composite article or a facing sheet over the applied foam-forming mixture, passing the facing sheets having the mat and the foam-forming mixture therebetween through the nip of two rotating rolls, and foaming the foam-forming mixture. The structural laminate is useful in thermal insulating applications.

Abstract: Polyoxyalkylene surfactants for cellular foams can be prepared by reacting under free radical polymerization conditions a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid in the presence of an organic or inorganic per-compound and a metal catalyst.

Abstract: An elutriation apparatus for de-shotting fibrous material carried in a liquid current comprises a battery of washing vessels located in sequence. A power driven mixing apparatus is provided in the first washing vessel of the sequence for dispersing the fibrous material. The upper section of each washing vessel is divided into two compartments by a baffle, while the vessel's lower section is unobstructed, whereby a current of liquid carrying fibrous material which is introduced into the upper section of the vessel to one side of the baffle travels downwardly and then underneath the baffle and upwardly to the vessel's upper section to the other side of the baffle. The latter upper section is provided with a spout for discharge of the fibrous dispersion from the vessel to the next washing vessel or to the separator apparatus located after the last washing vessel of the sequence for removal of the wash liquid from the de-shotted fibrous material.

Abstract: Method for making a molded resin-impregnated fibrous article having relatively dense surface layers separated by a less dense region. The article is made by disposing curable resin-impregnated compressible fibrous layers in a mold cavity the layers being separated by a medium which is collapsible by heat before impregnating resin cures in fiber regions adjacent said medium. Upon heating, the collapsible medium shrinks or is absorbed and the adjacent fibrous material expands to fill the space left by the collapsing medium.