Abstract: The disclosed coating system comprises a curable liquid epoxide and an amine hardener or co-curative. The amine co-curative comprises a blend of an aliphatic amine (e.g. trimethyl hexamethylene diamine) and a bismethylamino aromatic compound (e.g. a xylylene diamine). This coating system, when suitably combined with a reflectorizing material, has the ability to satisfy some or all of the very troublesome requirements of a highway marking or striping composition and is therefore useful in methods for marking or striping paved surfaces.

Abstract: An improved self-propelled carpet cleaning machine comprises a body movably mounted by a drive wheel. The body is powered by a drive motor which may be selectively connectable either to an AC power source located separately from the body or to a DC power source contained in the body. In addition, the body includes a first storage chamber for receiving fresh cleaning solution therein and a second storage chamber for receiving spent cleaning solution therein. The first and second storage chambers are provided by a flexible membrane which divides an enclosed cavity into two parts. A scrubbing means is also carried by the body in back of the drive wheel on the body. The scrubbing means includes means for applying the fresh cleaning solution to the carpet, a brush roller for agitating the carpet fibers contacted by the cleaning solution to remove foreign material therefrom, and a vacuum shoe for removing the spent cleaning solution from the carpet and placing that solution in the second storage chamber.

Abstract: An automatic self-propelled carpet cleaning machine comprises a body movably mounted by a drive wheel. The body is powered by a drive motor which may be selctively connectable either to an AC power source located separately from the body or to a DC power source contained in the body. In addition, the body includes a first storage chamber for receiving fresh cleaning solution therein and a second storage chamber for receiving spent cleaning solution therein. The first and second storage chambers are provided by a flexible membrane which divides an enclosed cavity into two parts. A scrubbing means is also carried by the body in back of the drive wheel on the body. The scrubbing means includes means for applying the fresh cleaning solution to the carpet, a brush roller for agitating the carpet fibers contacted by the cleaning solution to remove foreign material therefrom, and a vacuum shoe for removing the spent cleaning solution from the carpet and placing that solution in the second storage chamber.

Abstract: The disclosed coating method has the ability to satisfy some or all of the very troublesome requirements of highway marking or striping and is therefore useful to mark or stripe paved surfaces. The method involves:(a) supplying to the point of application an amine co-curative which includes an aliphatic amine (e.g. trimethyl hexamethylene diamine) and a cycloaliphatic amine (e.g. cyclohexane-bis[methylamine]);(b) supplying to the point of application a suitable curable liquid vicinal epoxide composition;(c) applying the co-curative and the liquid epoxide to the paved surface (preferably after intimately mixing the co-curative and the liquid epoxide); and(d) permitting the resulting mixture to cure in situ on the paved surface.

Abstract: The disclosed method for applying an epoxy mortar is highly streamlined and involves little more than blending the curable epoxide binder for the mortar, adding aggregate and water to form the mortar, spreading the mortar on a surface, and curing the mortar in place on this surface. Flood coats, special trowelling techniques, and hydrophobic coatings for the aggregate particles are usually unnecessary. The simplification of the mortar-applying method depends upon formulating an epoxy binder material which includes a polyfunctional primary amine having an extremely low affinity for water, particularly a polynuclear cycloaliphatic polyamine such as methylene-bis-(4-cyclohexyl amine).

Abstract: Apparatus for dispensing a plurality of string members, in particular thread or filaments coated with hot melt adhesives, to a machine wherein the string members are applied to a moving web. The apparatus includes a device for simultaneously regulating the tension on each of the string members. In the preferred embodiment, the tension regulating device includes a pair of cylindrical rollers disposed transverse to the direction of string member travel and about which the string members are wrapped. A braking mechanism is included to provide controlled resistance to the rotation of the cylindrical rollers and thereby regulate the tension on the string members.

Abstract: The disclosed article (e.g. a sanitary napkin) typically comprises (1) an elongated absorbent pad, (2) an outer covering layer in adherent contact with at least one surface of the pad, (3) an adhesive strip or layer on the exposed surface of the outer layer, and (4) a release liner for protecting the adhesive layer. The adhesive layer is useful for removably attaching the article to the inside of an undergarment or the like. Production of the article can be greatly simplified by using a hot-melt pressure sensitive adhesive (PSA) as the adhesive layer. However, the rubbery base for the hot-melt PSA should be very carefully selected. Two types of rubbery polymers provide good results, i.e. (a) an A-B-A block copolymer having polystyrene end blocks and a rubbery poly(ethylene-butylene) midblock and (b) a radial teleblock copolymer with branches having polystyrene terminal blocks and a butadiene segment in the center.

Abstract: A precast concrete structural unit is provided including a concrete sub-unit and a plastic resinous sheet. The sheet is adhered to the sub-unit at the time of pouring the concrete utilizing contact adhesive, preferably polychloroprene cement. The structural unit may further include adhesive coated reinforcement.

Abstract: A burial vault is provided including concrete wall portions and a plastic resinous liner. The liner is adhered to the wall portions, at the time of pouring the concrete, utilizing contact adhesive preferably polychloroprene cement. The vault may include adhesive coated reinforcement.

Abstract: Composites which comprise a substrate (such as paper) to which a mesh (e.g. chicken wire) is firmly clasped by means of a plurality of retaining bands that overlie the mesh and are bonded to the substrate through holes in the mesh. The composites are useful as, for example, a backing for stucco and plaster walls.

Abstract: The disclosed coating system comprises a curable liquid epoxide and an amine hardener or co-curative. The amine co-curative comprises a blend of an aliphatic amine (e.g. trimethyl hexamethylene diamine) and a cycloaliphatic amine (e.g. cyclohexane-bis[methylamine]). This coating system, when suitably combined with a reflectorizing material, has the ability to satisfy some or all of the very troublesome requirements of a highway marking or striping composition and is therefore useful in methods for marking or striping paved surfaces.

Abstract: The disclosed adhesive system comprises a curable liquid epoxide and a bisamino piperazine-containing thermoplastic polyamide hardener or co-curative. This adhesive system forms high strength metal-to-metal bonds with unusually high T-peel strength, high tensile shear strength, excellent low temperature properties, and good impact resistance while possessing the fast assembly speed characteristics of a hot melt. Both two-part and stable one-part curable systems can be formulated from (a) suitable epoxy resins and (b) the bisamino piperazine-containing thermoplastic polyamide.The particularly preferred polyamide comprises the amidification product, at temperatures of from 180.degree. C. to 300.degree. C.

Abstract: The disclosed method for forming an epoxy adhesive-bonded joint between a plurality of substrates is particularly well suited to an assembly line operation. The method involves forming an intimate mixture of the two components of a two-part adhesive system under conditions such that substantial curing will not occur until heat and/or pressure are applied. The application of heat and/or pressure for a short period of time initiates the curing reaction which will continue to completion under substantially normal ambient conditions. The initial bond strength is sufficient to hold mated substrates together with the bond strength increasing even when the curing process is completed under normal ambient conditions. For example, substrates can be coated with an intimate mixture of a two-part system suitable for use in this invention, stored for a period of time, mated on an assembly line under cure initiation conditions, and allowed to cure at normal room temperature and atmospheric pressure.

Abstract: An improved method for handling of materials having characteristics such that they are normally solid at room ambient temperatures and are prepared and used at elevated temperatures to transfer the form of the material to a liquid. The improved method provides for handling of the material in liquid form and extruding it as a stream or continuous flow, cooling the outer surface of the same to solidify it and severing the stream of material with the hardened exterior and liquid interior such that the individual segments severed therefrom seal themselves and form individual pillow-like segments which can be then further cooled to a hardened state and readily handled, packaged, shipped and used.

Abstract: A hot melt composition is used to form a closure liner, e.g. the circular, integral, gasket-like member adhered to the periphery of a circular top or closure for a food jar or the like. The hot melt composition is selected to have, in the solid state, sufficient deformabilty, resiliency, hardness, lubricity, and other requirements of closure liners. It has been found that silicone oil, used in a concentration of about 1-8% by weight of the total hot melt composition can provide a high degree of lubricity, similar to the type of lubricity in self-lubricated plastic bearings. The remainder of the hot melt system or composition generally comprises a rubbery block co-polymer (serving as a film former), a hydrocarbon wax, a hydrocarbon oil, and, if desired, a thermoplastic vinyl arene polymer such as poly(methylstyrene).

Abstract: A powdered, storage stable, effervescent formulation readily dispersible in water and containing a watersoluble chlorinated cyanurate, such as sodium dichloroisocyanurate, is mixed with water to provide a stable, slightly acid to neutral, non-irritating aqueous liquid having about 3,000 to 7,000 ppm titratable chlorine which is used as a teat dip for hygienic control of bovine mastitis.

Abstract: The disclosed heterogeneous hot-melt sealant system is particularly well suited to sealing the typical tongue-and-groove joint between the base and cover of a burial vault. The hot-melt system comprises a plurality of layers, each layer being a distinct phase which resists chemical or morphological penetration (e.g. paraffin oil migration) from the adjacent layer. The layers are typically applied to the groove in the cover for the vault by individual casting or pouring of each of a plurality of hot-melt compositions in the molten state. Each hot-melt composition comprises an essentially amorphous polypropylene, a hydrocarbon resin (e.g. synthetic terpene resin), and a hydrocarbon (e.g. paraffin) oil. The first (bottom) poured hot-melt contains more polypropylene and less oil and terpene resin than the second (upper) pour.