Abstract: Surfactant-free stable aqueous foams may be produced by water soluble copolymers of acrylamide and N-alkylacrylamide with chain lengths greater than or equal to 6 carbons. Additionally, these polymers may contain an anionic monomer, such as a monovalent salt of acrylic acid. These copolymers and terpolymers are added to water or brine at a concentration of 0.005 to 2 parts per 100 of solvent. When the resulting solutions are subjected to intensive mixing with the addition of air or other gases, such as nitrogen or carbon dioxide, high quality, persistent foams are formed. These foams are formed at relatively low polymer concentrations without added surfactants. They have good high temperature stability and excellent salt tolerance.

Abstract: Polyvinyl chloride resin in particulate form characterized by said resin particles being spherical in shape and said resin having low amounts of glassy content. Extrudates, such as pipe, formed from the novel resin of this invention have high impact strength. The novel resin of this invention has high bulk density and fast extrusion rates.

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 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: A moisture vapor permeable sheet material is comprised of a homogeneous admixture of a synthetic polymer material and a protein derivative. The sheet material is moisture vapor permeable and non-penetrable by liquid water. The sheet material additionally can have coated thereon a pressure sensitive adhesive which is comprised of a synthetic organic polymer adhesive and a soluble protein derivative in solid solution. Sheet material is formed by providing a homogeneous fluid solution of a soluble protein derivative and a synthetic organic polymer in a solvent. The protein derivative has a pH level compatible with the pH level of the organic polymer. Film is formed from the homogeneous fluid solution and the solvent is removed from the film to form the sheet material which is moisture vapor permeable. When the sheet material includes an adhesive, the adhesive is coated as a fluid solution in a solvent on one side of the sheet material.

Abstract: A method of manufacturing a fiber reinforced silicone foam is described. An aqueous silicone emulsion that cures upon drying at ambient temperature to an elastomeric film is combined with inorganic fibers having a diameter of less than 25 micrometers and a length of less than 10 mm to form a mixture. Air is dispersed through the mixture to form a stable froth. Removing the water from the stable froth yields an open-cell foam having cell walls comprising a thin layer of silicone elastomer reinforced with fibers. If electrically conductive fibers are used, the foam can be electrically conductive.

Abstract: Foamable compositions having low concentrations of select foaming agents provide uniform distribution of paper treating agents onto moving paper, including high speed applications, and treated paper having unimpaired properties.

Abstract: A process is disclosed for producing a composite reverse osmosis membrane. The process involves forming a porous polysulfone membrane from a solution of polysulfone followed by quenching the polysulfone membrane in an aqueous solution of m-phenylenediamine followed by reacting the m-phenylenediamine on the polysulfone membrane with either trimesoyl chloride or cyclohexane-1,3,5-tricarbonyl chloride in a water immiscible solution thereof.

Abstract: A process for producing a resin foam by using an aqueous medium, which comprises(a) treating a resin compound with said aqueous medium to cause the aqueous medium to adhere to and be held by the resin compound, said resin compound being composed of porous agglomerated particles resulting from partial melt-adhesion of thermoplastic resin particles coated with a fine hydrophilic solid powder which does not substantially melt at the melting temperature of the resin particles, said solid powder being embedded in the resin particles but partly exposed at their surfaces,(b) melt-kneading the resin compound treated with the aqueous medium under such an elevated pressure that evaporation of the aqueous medium is substantially inhibited, and(c) thereafter releasing the kneaded resin composition from the pressurized state to foam it; and a thermoplastic resin compound used for the aforesaid process.

Abstract: A foamable ink composition which comprises a water-based printing ink, a foaming agent and a pseudoplastic additive. The ink, foaming agent and pseudoplastic additive are foamed with a compressed gas. The pseudoplastic additive aids in the mixing of the ink with the gas and enhances the stability of the foam. The foam is especially adapted for application to a gravure cylinder where it is doctored to convert the foam bubbles into thin discrete membranes spanning the gravure cells. These membranes then are transferred, either directly or indirectly to a moving web.

Abstract: Inorganic-organic foams are obtained by foaming a mixture of(a) a 5 to 60% by weight aqueous alkali metal silicate or ammonium silicate solution,(b) a sufficient amount of a conventional hardener for aqueous silicate solutions,(c) a polymer of (meth)acrylic acid or a copolymer of acrylic acid and methacrylic acid or of (meth)acrylic acid and a copolymerizable monomer containing ethylinic double bonds, the polymer and copolymer being soluble in the aqueous silicate solution, some or all the carboxyl groups of the polymer or copolymer, where relevant, being neutralized by a base and the amount of polymer or copolymer being 0.1 to 30 parts per 100 parts of SiO.sub.2 contained in the aqueous silicate solution,(d) a blowing agent,(e) a surfactant having a foaming action and, where relevant,(f) gelling agent for solidifying the foam before hardening and/or conventional fillers, and allowing the foam to harden.The foams can be used as insulating materials in the construction industry.

Abstract: A composition comprising mineral wool and polyolefin fibers is adaptable for spraying onto a ceiling or wall or the like to form a textured acoustical coating.The fibers are mixed with a binder, water and foaming agent to form a foamy composition. The composition is confined under pressure and released through a nozzle to form a steam. Compressed gas is introduced into the stream to atomize the composition.

Abstract: A simplified method of manufacturing a silicone elastomeric foam comprises mechanically generating a stable froth of an aqueous emulsion, while adding surfactant and thickener, then exposing the stable froth to microwave energy to remove the water. The emulsion consists essentially of anionically stabilized hydroxyl endblocked polydiorganosiloxane, colloidal silica, an organic tin compound, and water, the emulsion having a pH in the range of 9 to 11.5 inclusive. The dried froth is an elastomeric, cellular structure possessing typical silicone elastomer heat stability and long-term aging stability.

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: There is disclosed a process for making vinyl polymer particles that are spherical, highly porous and of uniform size and substantially no polymer buildup on the reactor surfaces. A dispersion or emulsion is first formed with high agitation comprised of an aqueous medium containing a water-insoluble suspending or dispersing agent, the monomer or monomers to be polymerized, a monomer-soluble free radical yielding catalyst, and a surfactant or surfactant system. The dispersion is neutralized with an alkali and then polymerized with stirring to a conversion of about 10% to about 30% and then continuing the reaction to completion with increased stirring, the stirring in both instances being no greater than that used in making the dispersion or emulsion. The dispersing agent employed comprises an unneutralized crosslinked interpolymer of one or more carboxylic acid monomers with a polyunsaturated compound having a plurality of terminally unsaturated polymerizable groups.

Abstract: A process for making a lightweight structural member or insulating coating uses an initial mixture of hydrated lime, a dispersible additive, rock wool and, optionally an aggregate. This mixture has added to it water, and the water/solids mixture is agitated at high speed to produce a castable slurry having 60-80 volume percent air bubbles. The mixing is desirably conducted in a mixer having a cylindrical chamber and using paddles which rotate about their own axis and wherein there is movement of the chamber wall relative thereto, and the blades desirably scrape the chamber wall during such relative rotation.

Abstract: Process for making porous, substantially spherical particles having high bulk density of vinyl polymers or resins by the use of the suspension polymerization technique. In the polymerization there is employed a water-insoluble dispersant comprised of a substantially unneutralized crosslinked interpolymer of one or more carboxylic acid monomers with a polyunsaturated compound having a plurality of terminally unsaturated polymerizable groups and a surfactant system comprising at least one surfactant selected from the group consisting of a polyethylene oxide containing surfactant and a non-polyethylene oxide containing surfactant. Excellent results are obtained when both a polyethylene oxide and a non-polyethylene oxide containing surfactant are used in the process of the invention. Rapid stirring or high agitation is used while employing a monomer-soluble free radical yielding polymerization catalyst.

Abstract: A process for the preparation of a porous membrane is provided which comprises the steps of preparing an aqueous dispersion system by dispersing a first material in water, said first material being selected from the group consisting of waxy substances, fatty substances and mixtures thereof and having a melting point of from the room temperature to 100.degree. C., admixing with said aqueous dispersion system an aqueous solution or aqueous dispersion of a second material selected from the group consisting of high polymers and compounds forming high polymers when irradiated by light rays, forming a membrane from the admixture, drying said membrane to evaporate water therefrom and removing said waxy substances and said fatty substances contained in the dried membrane by extracting the same by the use of a solvent.

Abstract: Aqueous acidic compositions which contain a combination of an organic polymer having a bound latent source of thiolate ions, such as isothiouronium groups and an organic polymer having bound cationic onium groups, such as sulfonium groups, or a polymer containing both kinds of groups can be cured in the wet state by raising the pH to above about 9 at a temperature from about 0.degree. C. to about 100.degree. C.

Abstract: There is provided a method of producing an open-cell polyurethane foam comprising heating a mixture of an aqueous emulsion of a polyurethane-forming composition and a fluorocarbon compound of 1 to 3 carbon atoms having a boiling point of 5.degree. to 100.degree. C. The above emulsion may further contain an ionic surfactant.

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: A simplified method of manufacturing a silicone elastomeric foam comprises mechanically generating a stable froth of an aqueous emulsion, while adding surfactant and thickener, then exposing the stable froth to microwave energy to remove the water. The emulsion consists essentially of anionically stabilized hydroxyl endblocked polydiorganosiloxane, colloidal silica, an organic tin compound, and water, the emulsion having a pH in the range of 9 to 11.5 inclusive. The dried froth is an elastomeric, cellular structure possessing typical silicone elastomer heat stability and long-term aging stability.

Abstract: A method of producing silicone elastomeric sponge is disclosed. The method comprises freezing an aqueous silicone emulsion, then thawing and drying to produce a silicone sponge containing irregular closed cells. The aqueous silicone emulsion comprises water, an anionically stabilized hydroxyl endblocked polydiorganosiloxane, an organic tin compound, and a colloidal silica, the emulsion having a pH of from 9 to 11.5 inclusive.The sponge produced by the method is useful as insulation and gasketing at high and low temperatures.

Abstract: Process for making porous, substantially spherical particles of vinyl polymers or resins by the use of the suspension polymerization technique. In the polymerization there is employed a water-insoluble dispersant comprised of a substantially unneutralized crosslinked interpolymer of one or more carboxylic acid monomers with a polyunsaturated compound having a plurality of terminally unsaturated polymerizable groups and optionally a water-soluble surfactant with a polyether type hydrophilic segment using rapid stirring or high agitation while employing a monomer-soluble free radical yielding polymerization catalyst. When using the new process, the polymer buildup in the reactor is substantially reduced.

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: Improved rosin-based foams suitable for surface application to fibrous substrates such as paper and paperboard are described. The foams are obtained by aerating an aqueous solution having a pH of at least 8 and containing 0.1 to 5% of a water-soluble salt of rosin or fortified rosin and 0.02 to 5% of a water-soluble, amine-containing polymer compatible with the salt, the weight ratio of the salt to the polymer being within the range of 1:1 to 25:1.

Abstract: The invention relates to the production of foam composites which are thermally insulating and light and therefore suitable for use as e.g. ceiling tiles, wall tiles and brick insulation.The aim of the invention is to produce a light, strong composite as cheaply as possible. The method comprises reacting, in the presence of water and poly(vinyl alcohol), hollow silica spheres with a water-soluble organic polyacid and then allowing or causing the resulting composite to set.

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: Additive of the cellular plastic type, method for manufacturing the additive and use of the additive. The additive is intended to be mixed with a hardening or air-drying component, preferably, liquid paint. The additive of this invention is characterized in that a mixture of closed cellular plastic particles, disintegrated foamed urea formaldehyde resin and chopped fiberglass filaments or strands from part of the additive.

Abstract: An open cell polyurea polyurethane foamed sponge is produced by mixing together a resin and an aqueous pahse. The resin phase consists of a prepolymer made from a hydrophilic oxyalkylene polyol which is capped with isocyanate groups and from about 1-30% by weight of the prepolymer of a polymeric polysocyanate such as a PAPI resin. The aqueous phase contains water, reinforcing fibers, surfactants, a thickening agent and preferably up to 40% by weight of diatomaceous earth. The resulting foam has a reduced volume swell, rapid wet out and improved wet strength.

Abstract: This invention relates to a novel product, fibrils of crosslinked polyester resin having a vesiculated structure, and to a process of making them.Vesiculated fibrils of crosslinked polyester resin of length 50 .mu.m-5 cm, diameter 1 .mu.m-2 mm and aspect ratio of 10-50 are prepared by pouring into water with stirring a selected solution in unsaturated monomer of a carboxylated unsaturated polyester resin of acid value 10-90 mg KOH per g., the water containing both a base having a pK.sub.b value of 8 maximum and a dispersion stabilizer, and initiating polymerization. The polyester solution is selected for suitability for fibril formation by means of a buoyancy test.The fibrils are useful in a number of applications, for example, as fillers for paints and putties, viscosity modifiers in liquids and replacements in some applications for fibrous mineral extenders such as asbestos.

Abstract: The acetalization of polyvinyl alcohol in an acidic aqueous medium in the presence of a wetting agent yields an open-cell, solid foam when the reaction medium contains gas bubbles which are preferably produced by stirring air into the reaction mixture. By carrying out the acetalization in the presence of a nucleic acid a porous shaped article is obtained in which the cells are uniformly distributed. The dried shaped article absorbs a multiple of its weight of water. It can be used for household and industrial purposes.

Abstract: A water-in-resin emulsion for producing a porous plastic is comprised of a mixture of water dispersed in discrete droplets uniformly throughout a continuous phase of a resinous copolymerizable composition which includes a copolymerizable mixture containing a liquid unsaturated polyester of a polyhydric alcohol and saturated and ethylenically unsaturated dicarboxylic acids and a compound having a polymerizable CH.sub.2 .dbd.C< group, wherein the copolymerizable mixture has a molecular weight in the range of from about 2500 to about 3500; a cobalt salt promoter in an amount within the range of from about 0.25 to about 0.5% based on the weight of the copolymerizable mixture; a tertiary aromatic amine accelerator in an amount within the range of from about 0.75 to about 1.75% based on the weight of the copolymerizable mixture; and, a lithium salt emulsifier in an amount within the range of from about 0.5 to about 1.5% based on the weight of the copolymerizable mixture.

Abstract: A sealant for the remedial sealing of self-sealing coke oven doors, or ordinary coke oven doors sealed with a conventional lute, or for sealing spigot joints in off-gas pipe lines in coke oven installations comprises a mixture of from 25 to 45% of a latex, (preferably a PVA-based latex) from 10 to 25% water, from 25 to 45% of a particulate filler (preferably a talc) and from 5 to 15% of an inorganic fiber (preferably an asbestos fiber). At least 40% of the fiber should pass through a British standard 100-mesh sieve.The sealant may vary from a flowable to a putty or paste-like consistency and may be applied by spraying or trowelling as appropriate. If the inorganic fiber is not an asbestos the sealant may also include a proportion of a water soluble thickener to enhance the compatibility of the mixture.

Abstract: The instant invention is directed to a process for the production of inorganic-organic synthetic materials having high strength, elasticity, dimensional stability under heat, and flame resistance, consisting of a polymer-polysilicic acid gel composite material in the form of a solid/solid xerosol, said process comprising mixing(a) an organic polyisocyanate,(b) an aqueous basic solution and/or an aqueous basic suspension having an inorganic solid content of from 20-80% by weight preferably from 30-70% by weight,(c) a flowable inorganic compound and optionally(d) catalysts and other additives and allowing the resulting mixture to react, characterized in that mixing is carried out by first combining components (a) and (b), optionally with the addition of all or part of component (d), to form a stable primary dispersion and thereafter adding component (c), optionally the addition of all or part of component (d), to form a final dispersion.

Abstract: Opacifying agents of improved structural integrity and light scattering ability are disclosed. These agents are composed of hollow, substantially spherical agglomerates having discontinuous walls composed of solid, spherical microparticles. The microparticles are produced by admixing an aqueous, partially condensed aldehyde condensation product with an oily non-solvent material and an emulsifying agent to produce a water-in-oil emulsion. Polymerization acid catalyst is then admixed with the emulsion to produce the discrete, substantially spherical and opaque, solid microparticles. After inverting the emulsion to oil-in-water form and adding oil-soluble resin adhesive, elevated temperature is used to cure the adhesive while evaporatively removing residual oily non-solvent. This yields improved agglomerate opacifying agents of high physical stability.

Abstract: A porous thermoplastic sheet is formed by adding a material to a polymer latex to passivate the aqueous phase of the latex. An additional material of a preselected particle size, corresponding to the desired pore size of the final product is then added. The latex composition is gelled and is then formed into a sheet. The sheet is dried and cured or sintered and the solubles are extracted therefrom with a solvent. A preferred polymer latex is PTFE.

Abstract: A porous composite material includes a porous body formed of a hydrophobic polymer such as polyvinyl chloride and a layer of a hydrophilic polymer such as polyvinyl alcohol provided over at least a portion of the interior surface of each of the pores of the porous body. The composite material is obtained by a process including the steps of dispersing an aqueous solution containing a hydrophilic polymer and a foaming agent into a solution of a hydrophobic polymer in an organic solvent to form an emulsion, removing the water and the organic solvent from the emulsion to obtain a solid, and subjecting the solid to foaming conditions.

Abstract: A sealant for the remedial sealing of self-sealing coke oven doors, or ordinary coke oven doors sealed with a conventional lute, or for sealing spigot joints in off-gas pipe lines in coke oven installations comprises a mixture of from 25 to 45% of a latex, (preferably a PVA-based latex) from 10 to 25% water, from 25 to 45% of a particulate filler (preferably a talc) and from 5 to 15% of an inorganic fibre (preferably an asbestos fibre). At least 40% of the fibre should pass through a British standard 100-mesh sieve.The sealant may vary from a flowable to a putty or paste-like consistency and may be applied by spraying or trowelling as appropriate. If the inorganic fibre is not an asbestos the sealant may also include a proportion of a water soluble thickener to enhance the compatibility of the mixture.

Abstract: Microspheric opacifying agents are provided by admixing an aqueous, partially condensed, aldehyde condensation product with an oily material containing an emulsifying agent thereby forming a water-in-oil emulsion, admixing an amphiphilic acid catalyst with the emulsion and polymerizing the condensation product to form discrete, substantially spherical, opaque, solid particles. Additionally, the solid particles may be separated from the oily continuous phase and admixed with water for the further removal of oily material, and thereby causing the formation of spherical agglomerates or "super particles" having a substantially greater opacity than the aforesaid discrete particles. The super particles are hollow, substantially spherical particles having substantially spherical, discontinuous walls composed of agglomerated substantially spherical particles.

Abstract: Novel rubber latex compounds comprise an aqueous dispersion of a natural or synthetic rubber latex and as a foaming agent an alkyl alkoxy sulphosuccinamate of the formula: ##STR1## wherein R represents an alkyl group having from 7 to 18 carbon atoms, one of X and Y represents a hydrogen atom and the other represents a SO.sub.3 group, n is an integer having a value of from 0 to 5 and R.sub.1 represents an alkylene group comprising 2 or 3 carbon atoms. These foaming agents combine the virtues of acceptable foaming properties with relatively high solubility in aqueous solution. They can be prepared and transported as aqueous concentrates containing up to 45% of solids material.Those compounds wherein R.sub.1 represents a branched chain alkyl group are believed to be novel and are claimed as such.

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: Pressure-resistant polyurethane-polyurea particles with textured internal mass prepared from a liquid phase immiscible with water and containing organic solvents, isocyanate prepolymers and optionally active substances or mixtures of active substances, the liquid phase being dispersed in an aqueous phase at temperatures of from 0.degree. C. to 95.degree. C., wherein the liquid organic phase contains as isocyanate prepolymer a reaction product of a stoichiometric excess of an aliphatic, aromatic, cycloaliphatic, or araliphatic di- or polyisocyanate with a di- or polyol, the reaction product having a mean molecular weight in the range of from about 300 to 10,000, and an alkyl and/or alkoxyalkyl acetate of the formula ##STR1## in which m is zero, 1 or 2, n is 1 to 4, and R is (C.sub.1 -C.sub.5)alkyl, and the aqueous phase contains a protective colloid and optionally a surface-active agent.

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: Pulverulent polyvinyl chloride molding compositions capable of being sintered are produced by polymerizing vinyl chloride in suspension using suspension stabilizers and non ionic wetting agents and as emulsifier alkylaryl- and/or alkyl sulfonic acids. The molding compositions are especially suitable for making separating plates for electric cells.

Abstract: A heat sensitive, but stable, gellant system is added to a foam latex during manufacture of the latex or as an additive ingredient being incorporated at the time of preparing the liquid foam compound. The system is comprised of an amphoteric surfactant acid or an amphoteric surfactant acid neutralized with a fixed alkali, said surfactant being capable of both sensitizing the latex emulsifier and functioning as a stabilizer; a water soluble ionizable organic or inorganic acid capable of activating the gelation mechanism and a water soluble, volatile, organic or inorganic base which is added in an amount sufficient to neutralize the combination of the surfactant and the acid to a pH of 8 to 12.

Abstract: The instant invention is directed to a process for the production of inorganic-organic synthetic materials having high strength, elasticity, dimensional stability under heat, and flame resistance, consisting of a polymer-polysilicic acid gel composite material in the form of a solid/solid xerosol, said process comprising mixing(a) an organic polyisocyanate,(b) an aqueous basic solution and/or an aqueous basic suspension having an inorganic solid content of from 20 to 80% by weight, preferably from 30 to 70% by weight,(c) an organic compound containing at least one isocyanate reactive hydrogen atom and at least one non-ionic-hydrophilic group and(d) optionally catalysts and other additivesand leaving the resulting mixture to react, characterized in that components (a) and (b), optionally with the addition of part or all of component (d) are first mixed together to form a stable primary dispersion and thereafter component (c), optionally with the addition of all or part of component (d), is added to form the fi

Abstract: This invention relates to an improvement in a sheet material comprising natural or synthetic rubber or a rubber-like polymer, which is capable of absorbing and transmitting water vapor and which contains a uniformly incorporated addition of polymer particles, the improvement that the addition comprises particles of at least one swellable modified polymer. The invention also relates to a process for the manufacture of the sheet material.

Abstract: Amino resin foams of the urea-formaldehyde or urea-melamine-formaldehyde type formed from a one-phase solution of methylene chloride solvent, propylene glycol co-solvent, catalyst and polymer precursors which may be urea and formaldehyde or urea, melamine and formaldehyde. As reaction occurs between the polymer precursors in the solution, the methylene chloride in the solution vaporizes foaming the resin. In the product foam, the propylene glycol acts as a plasticizer and the methylene chloride as the blowing agent in a closed-cell foam having superior stability and insulative properties. The product foam is useful in building insulation and for other insulative purposes.