Abstract: A gel-forming composition of matter comprising an aqueous solution of a mixture of certain percentages of monomeric acrylamide and monomeric N,N' methylenebisacrylamide and a polymerization catalyst and containing certain percentages of an unfired natural diatomaceous earth having a certain particle size is used in treating earthen formations around the joints of sewer pipes, whereby fluid loss from the composition into the earthen formation is substantially reduced.

Abstract: Covers a method of producing a polyurethane by utilizing compounds of the structure below as catalysts in reacting an organic polyisocyanate with an organic polyester polyol or polyether polyol in the presence of said catalyst: ##STR1## where R is lower alkyl and X is hydrogen or CONR.sub.1 R.sub.2 where R.sub.1 and R.sub.2 are independently selected from the group consisting of hydrogen, alkyl and aryl with the proviso that both R.sub.1 and R.sub.2 may not be aryl.

Abstract: An expandable chemical coating compounded by an admixture of a paint, ink or dye with a polymeric composition embodying an encapsulation of a volatile, gas-producing substance which is heat-expandable in a thin polymeric film, said capsules being dispersed in a polymeric composition such that upon application of heat, the encapsulated volatile substance vaporizes to expand and fracture said capsule, thereby trapping the evolving gas in a polymeric medium so that the medium coating is expanded to produce a three-dimensional effect.

Abstract: A method of producing a polar, porous polymer comprising polymerizing a monomer mixture comprising:(A) about 2 to about 98 percent by weight of at least one cross-linkable monomer having a plurality of CH.sub.2 .dbd.

Abstract: Random copolymers of polyparabanic acids and polyamides are described. The copolymers are highly useful engineering thermoplastics which, unlike the corresponding polyparabanic acids alone, are readily moldable by extrusion, injection molding and like techniques. The copolymers are readily prepared by a one-shot reaction of (i) bis(alkoxyoxalyl)amides of aliphatic, araliphatic or aromatic diamines, (ii) aromatic or aliphatic dicarboxylic acids, and (iii) organic diisocyanates.

Abstract: This invention relates to the use of certain finely divided, stable and relatively low viscosity dispersions of polyisocyanate polyaddition products in compounds having hyroxyl groups. The dispersions are produced by reacting1. organic polyisocyanates with2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in3. compounds having at least one hydroxyl group, whereinCompounds (3) have secondary hydroxyl groups in cases when compounds (2) have primary hydroxyl groups and wherein the components are reacted in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water.

Abstract: Addition of 0.2 to 0.4 parts of a liquid block copolymer silicone to 100 parts of an organic isocyanate to lower the surface tension of the resulting composition to less than 40 dynes/centimeter to obtain an isocyanate composition that has long room storage stability without crystallization and when used in an impingement type mixture produces polyurethane of a more uniform composition.

Abstract: The instant invention relates to the use of stable, relatively low viscosity dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents in the preparation of polyurethane resins. The dispersions are made by a process which broadly comprises mixing an aqueous dispersion of an isocyanate-polyaddition product with a compound having at least two hydroxyl groups and having a boiling point about 100.degree. C, and thereafter at least partially distilling off the water.

Abstract: A water-containing plastic composition which comprises (a) 10-90 wt. % of water-containing powdery gel obtained by subjecting at least one water-soluble polymer such as polyvinyl alcohol, polyacrylamide, polyvinylpyrrolidone or poly(hydroxyalkyl acrylate), while it is in the state of an aqueous solution, to crosslinking reaction and then pulverizing the crosslinked product and (b) 90-10 wt. % of at least one plastic substance selected from thermoplastic and thermohardenable plastics. The water-containing plastic composition is suitable as a material for manufacturing poorly combustible molding materials.

Abstract: This invention provides an improved composition and method for dispersing high molecular weight flocculant polymers and copolymers used for water and waste treatment by the combination of the polymer with an inert additive and a small amount of water.

Abstract: Stable aqueous emulsions are described which are free from conventional emulsifiers and protective colloids and contains as the dispersed phase uniformly-sized particles of a copolymer of at least 75% by weight of acrylate monomer(s) or a mixture of acrylate monomer(s) and a vinyl monomer, optionally together with up to 10% by weight of the acrylate monomer(s) or the mixture, of a copolymerizable monomer having at least one functional group or reactive site, and up to 25% by weight of a monoester of an unsaturated dicarboxylic acid. The emulsions are formed by copolymerizing the monomers in an aqueous medium which is free from conventional additives including buffers, emulsifiers, stabilizing colloids and chain terminating compounds. The emulsions are particularly useful in formulating water-based air-drying high gloss paints.

Abstract: An improved polyurethane obtained by reacting 3,3'-dimethyldiphenyl methane-4,4'-diisocyanate with a polyether polyol and curing with 2,2'-dithiodianiline in the presence of a catalytic amount of triethylene diamine.

Abstract: A process is provided for coating a metal substrate to give new and improved results in the preparation of resin coated metals, particularly steel, aluminum, magnesium, and zinc surfaced articles including galvanized iron or steel.

Abstract: The title compounds are prepared by contacting a linear, acylated polyalkylenepolyamine, such as poly(N-propionyl)ethylenimine, and a diisocyanate, such as toluene diisocyanate, at a temperature of about 30.degree.-200.degree. C. These novel, crosslinked polyalkylenepolyamines are useful water absorbants and bleach Kraft-pulp effluent decolorants.

Abstract: This invention discloses a polymer composition for the coating of substrates, comprising an aqueous alkaline blend having a binder consisting essentially of two components. Component A) is an addition copolymer of (1) about 3% to about 30% by weight of an olefinically unsaturated monomer containing a carboxyl group or mixture thereof, (2) at least one ester of acrylic or methacrylic acid, and, optionally, (3) other olefinically unsaturated monomers, the total of (1), (2) and (3) being 100%. The weight average molecular weight of the copolymer is between 10,000 and 500,000, and it is in the form of a solution or a colloidal solution in an aqueous phase. Component B) is an oligomeric addition copolymer of (1) at least one ester of acrylic or methacrylic acid, (2) 9% to about 50% of an olefinically unsaturated monomer having at least one carboxyl group, and, optionally, (3) other olefinically unsaturated monomers, the total of (1), (2) and (3) being 100%.

Abstract: Aqueous dispersions of polymers of tetrafluoroolefin and tetrafluoroolefin/hexafluoropropylene containing other film-forming materials such as polyamide acid salts or polymeric quaternary hydroxides blended with nitrogen-resins and articles coated or impregnated with these dispersions are provided.Coatings prepared from such dispersions provide lubricity, release properties, chemical and high temperature resistance, and electrical insulation for a wide variety of substrates such as metals, ceramics and the like.

Abstract: Latices in which the particles, of uniform diameter from 0.2 to 2 .mu.m, comprise a core of vinyl homo or copolymers or of vinyl-diene copolymers with less than 15% of diene, and a periphery formed by a copolymer having --CN groups.

Abstract: A polymer emulsion is produced by reacting a vinyl monomer having an active halogen with a higher amine in a monomer having ethylenically unsaturated double bond and then conducting a free radical polymerization with the addition of water.

Abstract: A polymer emulsion is produced by the free radical polymerization of a monomer having an ethylenic unsaturated double bond in the presence of 0.1 to 10 wt parts of a compound having the formula ##STR1## wherein R.sub.1 represents hydrogen atom or methyl group; R.sub.2 represents hydrogen atom, methyl or ethyl group; R.sub.3 represents an alkyl group having 6 to 22 carbon atoms; n is 1, 2, or 3; and X represents a halogen atom, per 100 wt parts of the monomer.

Abstract: This invention provides an improved composition and method for dispersing high molecular weight flocculant polymers and copolymers used for water and waste treatment by means of an effervescing additive.