Abstract: A gas barrier film-surfaced foamed sealant composition, especially useful for application to mine stoppings and other geological formations, is derived from a foamed sealant-forming medium comprising an aqueous elastomeric latex binder such as a styrene-butadiene rubber (SBR) latex, a particulate filler such as clay, a gelling agent such as ammonium sulfamate and a gaseous foaming agent such as air dispersed therein. The foamed sealant possesses a gas-impervious barrier film or coating on its exposed surface, e.g., one obtained from the aforesaid sealant-forming composition but which has not been foamed or frothed.

Abstract: Anionic Emulsions of asphalt, bitumen, or tar which may optionally contain a latex of a rubbery polymer may be set using a destablizing system comprising either an alkali silicofluoride in the presence of a sulfamate or a mixture of an amine in the presence of a divalent metal ion. The setting time for such emulsions can be reduced to less than half an hour.

Abstract: The disadvantages associated with using plastic sheet mulch may be overcome and enhanced crop production obtained by applying to an agricultural domain an aqueous compound capable of forming a durable crust under the condition of use comprising per 100 parts by weight of polymeric binder from about 100 to about 1,600 parts by weight of a fine particulate filler to provide a dry coat weight from 0.1 to 5.0 ounces per square foot.

Abstract: Two preformed materials such as paper, fabrics, glass, sheet metal, at least one of which is pervious to water vapor, are joined together with a solvent-free adhesive based on a latex of a rubbery polymer. The latex is one which is stabilized with an emulsifier which forms water-insoluble compounds with zinc or cadmium ions. Included in the adhesive formulation is an ammonium or amine salt gelling agent for the latex, a zinc or cadmium ion donor compound and sufficient ammonia or a compound which releases ammonia to provide a pH of above 8 to the adhesive formulation. A surface of at least one of the preformed materials is coated with the adhesive and then contacted with a surface of the other material and held in such contact while heating to gel the latex and evaporate the water from the intersurface layer of adhesive.

Abstract: A method of making sound insulating floor or wall covering in which carpet is backed with a layer of sound insulating material and a layer of contour retaining material for holding the covering in a desired contoured shape. The latter material, which is conveniently a carpet precoat, is made formable for instance by heating, the carpet and its backing is shaped to desired form, and the retaining material is allowed to set thus holding the carpet and sound insulating layer to that shape. Desirably, the insulating material is a curable rubbery polymer which is cured before carpet shaping takes place. For improved sound insulating properties, deaerated insulating material is used.