Abstract: This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9, (B) dialkyltindicarboxylate, (C) alkylorthosilicate, (D) colloidal silica, and optionally (E) water, admixing (A) and (B) only in the presence of (C) to produce a dispersion of the ingredients in water. The ingredients can be distributed into a two-part system for storage. One embodiment includes fibers, lauryl alcohol, or a mixture of both in the emulsion; then forms an open-cell, elastomeric foam by forming a froth from the emulsion and removing the water from the froth.

Abstract: This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9, (B) dialkyltindicarboxylate, (C) alkylorthosilicate, (D) colloidal silica, and optionally (E) water, admixing (A) and (B) only in the presence of (C) to produce a dispersion of the ingredients in water. The ingredients can be distributed into a two-part system for storage. One embodiment includes fibers, lauryl alcohol, or a mixture of both in the emulsion; then forms an open-cell, elastomeric foam by forming a froth from the emulsion and removing the water from the froth.

Abstract: This invention relates to a method of producing silicone elastomeric foam of low density. The method mixes polydiorganosiloxanes having hydroxyl endblocking or vinyl endblocking or mixtures of both along with water to react with silicon hydride in the presence of platinum catalyst to release hydrogen gas to create a froth which cures to a foam. The combination of ingredients allows the manufacture of silicone foam having different combinations of properties than those obtained from previous methods. Embodiments of the invention also make use of specific profoamers and specific alcohols to further modify the properties of the foams produced. The method of this invention yields a low cost, low density, silicone elastomeric foam having physical properties which enable it to be used in cushioning and sealing applications.

Abstract: This invention relates to a method of producing silicone elastomeric foam of low density. The method mixes polydiorganosiloxanes having hydroxyl endblocking or vinyl endblocking or mixtures of both along with water to react with silicon hydride in the presence of platinum catalyst to release hydrogen gas to create a froth which cures to a foam. The combination of ingredients allows the manufacture of silicone foam having different combinations of properties than those obtained from previous methods. Embodiments of the invention also make use of specific profoamers and specific alcohols to further modify the properties of the foams produced. The method of this invention yields a low cost, low density, silicone elastomeric foam having physical properties which enable it to be used in cushioning and sealing applications.

Abstract: The resistance to internal charring of molded styrene-butadiene latex foam rubber when exposed to a lit cigarette is improved by incorporating from about 10 to 30 parts by dry weight, per hundred parts by dry weight of latex of a compound selected from the group consisting of an organic phosphate of the formula ##STR1## wherein R is a C.sub.6-12 alkyl radical or a phenyl radical, which is unsubstituted or substituted by a C.sub.1-4 alkyl radical, butyl benzyl phthalate, and a mixture thereof.

Abstract: A novel tire sealant and inflator composition comprising a resin, a latex sealant, alkylene glycol, fibers, an alkanolamine, a foaming agent, and water. The composition is packaged in aerosol cans with a chlorofluorocarbon propellant/inflator and used to seal and inflate punctured tires. The composition is applied to the punctured tire through the valve stem, and acts to seal the puncture and inflate the tire sufficiently to support the weight of the car.

Abstract: A method of providing cured latex-based compositions is disclosed which permits in situ curing of latexes disposed in plastic container closures or other heat sensitive receptacles without adverse effect on the closure or receptacle. The method comprises heating a fluid latex composition to gel the latex and effect removal of at least a portion of the water initially contained therein and subjecting the resultant composition to modulated microwave energy to effect curing thereof. Modulation of the microwave energy is achieved by applying same in an intermittent or pulsed fashion. The method is of particular interest for the in situ formation of cured latex-based gaskets in polyalkylene container closures.

Abstract: A flexible foamed or solid rubber mass is produced on a substrate by ejection. Two pressurized containers are used, one containing an aqueous latex dispersion together with a pressurized inert propellant and the other an aqueous coagulant solution together with a pressurized propellant and the solutions are ejected simultaneously from two vessels so as to converge on the target and impinge thereon at spots distanced from each other by not more than 50 cm.The invention also provides an apparatus for carrying out the method.The invention is applicable whenever it is desired to produce instantaneously a flexible foamed or solid rubber mass on a substrate. One of the important applications of the invention is self-defense and the combatting of riots.

Abstract: An improved frothing aid composition for use in combination with sodium polyacrylate viscosity regulator which consists about 70 to 99% by weight of a surfactant and from about 1 to 30% by weight of a thickener comprising a copolymer of acrylic or methacrylic acid with at least one copolymerizable monomer selected from the group consisting of alkyl acrylates or methacrylates having up to 6 carbons in the alkyl, vinylidene aromatic monomers and aliphatic conjugated diene monomers of 4-10 carbon atoms.

Abstract: The manufacture of foam rubber having improved set and deflection properties at low foam densities is provided.

Abstract: A fast curing foamable composition useful for the production of fabric-like materials comprises a resin or latex formulation and a mixture of a highly ethoxylated alkylphenol, an alkali metal N-alkyl sulfosuccinamate and an alkali metal alkyl sulfate.

Abstract: A low smoke neoprene latex foam having physical properties suitable for cushioning and method of making the same are provided in which at least 200 parts of hydrated alumina are added per 100 parts of dry neoprene latex with the hydrated alumina being at least 66% in the size range 40 microns and larger and the balance in the size range below 40 microns.

Abstract: Rubber compositions comprising a blend of a major amount of polybutadiene having 1,2-addition in the range of about 25 to about 65 percent and a minor amount of polybutadiene having trans-1,4-addition of at least about 70 percent. Also vulcanized cellular rubber compositions in which the rubber comprises a blend of a major amount of polybutadiene having 1,2-addition in the range of about 25 to about 65 percent and a minor amount of polybutadiene having trans-1,4-addition of at least about 70 percent.

Abstract: Nontacky, elastomeric shaped objects (e.g., pellets or filaments) comprising a normally tacky, uncured elastomer having an integral, porous coating of silicic or aluminic acid polymer can be prepared by bringing shaped bodies of a normally tacky, uncured elastomer latex into contact with an aqueous bath containing a soluble coagulating salt for the latex, and a silicic or aluminic acid polymer, and washing and drying the resulting coated shaped objects. The shaped objects are highly porous before washing and drying, and some porosity remains even after washing and drying.

Abstract: Bauxites are rendered compatible with polymer compositions employed in the carpet industry. Suitable bauxites, which can be employed as flame-retarding fillers, are characterized by a surface area of less than about 12 m.sup.2 /g, a pH in aqueous suspension of more than about 6.5 and a particle size distribution, wherein less than about 15% by weight of the particles have a size of less than 3 microns. Bauxites having a surface area in the range of about 12-20 m.sup.2 /g can also be rendered compatible by modifying their surfaces with a small but effective amount of modifier selected from inorganic phosphates, silicates, aliphatic and aromatic hydroxycarboxylic acids.

Abstract: The gel range of acid-acting delayed-action gelling agents, such as sodium silicofluoride, in latex spread foam compounds which are to be gelled by subjecting them to a preliminary heat treatment prior to drying is substantially broadened by including a water-soluble ammonium or amine sulfamate in the compound. At least 0.5 parts by weight of the sulfamate should be used per 100 parts by weight of dry solids in the starting uncompounded latex. It can be added to the latex at any time before or during the compounding step and it is preferably added with 0.5-1 part of a soap per part of sulfamate and also with sufficient ammonium hydroxide or other ammonia donor compound to maintain the pH of the compounded latex composition at 9.5 or higher.

Abstract: An expansion agent comprising a foamable mixture of (a) 15-53 weight % of a foaming agent having 6 to 78 carbon atoms selected from the group of an ammonium salt, aliphatic amine salt and/or an alkali metal salt of an alkyl sulfate, hydroxyalkyl sulfate, alkyl ether sulfate and/or aryl alkyl ether sulfate; (b) 5-42 weight % of a dispersant having 22 to 260 carbon atoms selected from the group of an alkyl alkyleneoxy amine and/or its quaternary alkylsulfate, alkylhalide or alkylphosphate derivative; and (c) 5-40 weight % of a stabilizer having 8 to 68 carbon atoms selected from the group of a sodium and/or potassium salt of an alkyl sulfosuccinate; and the combination of said mixture with a synthetic resin, latex or natural rubber to provide a coating or finishing composition; the process of applying said composition to a substrate and the treated substrate product having incorporated the composition of the invention.

Abstract: A no-gel latex foam is formed by curing a no-gel latex foam froth on a water vapor-permeable foraminous support means comprising a backing material that has been coated with a water soluble release agent. During curing, the foam froth dehydrates through an upper free surface and at its lower supported surface through the release agent and the foraminous support means. The cured foam is then removed from the foraminous support means free of any backing material.