Abstract: Vinyl terminated, fully reacted urethane compositions comprise the reaction product of polyisocyanate, an hydroxyalkylated novolac and an ethylenically unsaturated alcohol. The vinyl terminated compositions are copolymerizable with ethylenically unsaturated monomers to produce thermoset polymers characterized by excellent physical properties and a high degree of resistance to acids and alkalies. The polymers are especially useful in the manufacture of molded articles and laminates and in the formulation of marine coatings.

Abstract: A ceramic capacitor is provided having a flame retardant electrical insulation coating characterized by blending 10 - 15 percent by weight of an uniformly melt-blendable non-heat-reactive type synthetic resin, with melting points between 70.degree. and 150.degree. C. into a flame-retardant wax, which contains a halogenated flame retardent.

Abstract: Polymerizable polyester molding compositions having good shrinkage control comprise (1) a polymerizable polyester, and (2) a low profile additive comprising the reaction product of a styrene-maleic anhydride copolymer and a polydiene having terminal hydroxyl groups.

Abstract: A method for manufacturing foundry molds, which comprises preforming a foundry sand mixture comprising sand, a resol type phenol-formaldehyde resin, a solvent, and optionally, a curing agent for said resin, or a curing agent for said resin and a thermoplastic resin; and thereafter removing the solvent from the preformed mixture by evaporation.

Abstract: There is provided a polymer composition based upon an oxyalkylated novolac intermixed with a vinyl halide polymer. The compositions of the invention provide improved processing characteristics with reduced melt viscosity and improved physical and mechanical properties. Mixtures of (1) polyvinyl halide, oxyalkylated novolac and impact modifier, such as an acrylic polymer or (2) mixtures of oxyalkylated novolac and polyvinyl halide modified to provide improved impact strength by graft polymerization show improved compatibility of the rubbery polymer phase resulting in optimum impact strength for the composition.

Abstract: A no-bake foundry binder system comprises an alkali metal silicate binder and a hydroxy-terminated polyester.

Abstract: Activated carbon filtration materials are obtained by impregnating phenolic resins into inorganic porous bodies, such as ceramic filter tubes and plates, then baking the impregnated bodies to carbonize the resins. The invention also includes improved methods for purifying aqueous liquids contaminated with phenol, live bacilli, pyrogens, or water soluble organic dyes and a process for regenerating spent filters.

Abstract: An improved process for curing sulfhydryl-terminated thioether polymers substantially devoid of aliphatic unsaturation having a sulfhydryl functionality of 2 to 3 to obtain thioether elastomers is disclosed wherein the liquid thioether is reacted with a curing amount of tertiary butyl perbenzoate. Preferably the curing reaction is carried out at about ambient temperature in the presence of a copper, especially a divalent copper, promoter for the reaction. The improved curing process shortens the curing time and extends the effective working life of the curing reaction mixture. The cured products are of enhanced thermal stability and are useful as elastomeric sealants such as architectural sealants.

Abstract: Polyvinyl chloride compositions comprising per 100 parts by weight of polyvinyl chloride, about 0.7 to 14 parts of a polyvinyl chloride plasticizer, about 4 to 25 parts of an impact-modifier, about 1 to 3 parts of a processing aid, and about 1 to 3 parts of at least one lubricant. The compositions are preferably stabilized with a total of about 6 and 9 parts of stabilizer and stabilizer booster combination. The compositions are formable with finger pressure at temperatures above a minimum forming temperature for each specific composition. Said minimum forming temperature is preferably between about 120.degree. F and 160.degree. F.

Abstract: An aromatic polyester of an aromatic dicarboxylic acid and halogenated bisphenol having a glass transition point above about 175.degree. C is employed as a non-blooming fire retardant additive for polymer compositions.

Abstract: Compositions which are useful for binding solid, discrete particles are comprised of a liquid one-step phenol formaldehyde resin, a urea resin component such as urea formaldehyde, an accelerator selected from an acid and a salt of an acid, and an aqueous emulsion of polyethylene. The wet mixtures of the foregoing components exhibit improved flow characteristics in intricate molds. The wet mixtures are useful for molding foundry core compositions and consolidated wood compositions that have improved moisture resistance.

Abstract: Plugging compositions for blast furnace tap holes comprising a refractory filler, a wetting agent, and a binder therefor comprising a phenol-aldehyde condensate resin chemically modified by reaction with lignin have a muddy consistancy, and are characterized by enhanced compressive strength at elevated temperatures and increased plasticity at low temperatures as compared to conventional binders.

Abstract: An improved vinyl halide or vinyl halide copolymer containing up to 50 percent of a copolymer can be obtained by polymerizing in contact with an aliphatic hydrocarbon olefin homopolymer, copolymer or terpolymer in a process of bulk polymerizing comprising single stage or two-stage bulk polymerization wherein high speed agitation is used during the first stage and low speed agitation is used in the second stage. By polymerizing in the presence of the olefin polymer or copolymer, reduced particle size, reduced lump formation, and lower melt viscosity and improved impact strength can be obtained in the resin product. Small amounts of the olefin polymer or copolymer are effective in providing particle size control, reducing lump formation and eliminating scale build-up. Larger amounts of olefin polymer increase impact strength, reduce melt viscosity and provide excellent mold release properties in the final product.

Abstract: Reactive mixtures comprising a polydienediol, an hydroxyalkylated novolac, and a polyisocyanate may be mixed with an inert filler composition to form granular molding compounds suitable for the preparation of molded articles having advantageous mechanical and electrical properties.

Abstract: Polymers of excellent impact strength, reduced particle size, and enhanced proportions of fines are obtained in the bulk polymerization of a vinyl halide or mixture thereof with comonomer(s) in the presence of a high molecular weight polyolefin added to the polymerization mass upon conversion of 0 to about 20% by weight of monomer(s) to polymer, by removing from the polymerization mass during the thick paste state thereof sufficient vinyl halide to adjust the effective concentration of polyolefin to above about 3.5% based on vinyl halide. The resultant product which contains an enhanced proportion of fines and is devoid of massive agglomerates, requires less mechanical work in comminution or shorter heating in melting in subsequent conventional processing steps.

Abstract: A cold-curing binder for foundry sand cores and molds comprises (a) an oil-modified alkyd resin, said resin characterized by an oil component which comprises a mixture of tall oil fatty acid and linseed oil in the ratio of from about 20:80 to about 80:20 parts by weight, (b) a polyisocyanate component, and (c) a curing accelerator. The novel binders of this invention generate less objectionable odor during the casting operation and cure more rapidly than conventional binders.

Abstract: An improved process is disclosed for production of sulfhydryl-terminated compounds by reaction of an allene and hydrogen sulfide initiated with ultraviolet light of wavelength above about 2600 Angstroms to obtain a colorless product of improved purity. The invention also includes the polymerization of an unsaturated hydrocarbon with the sulfhydryl-terminated product to prepare a sulfhydryl-terminated polythioether. These compounds are useful as chemical intermediates and precursors of elastomeric sealants, such as architectural sealants.

Abstract: High molecular weight, linear aromatic polyesters having an ordered microstructure are produced in an improved solution polycondensation process in which the hydroxyl component is added to the acid halide.

Abstract: This invention relates to a process for manufacturing a shaped active carbon by using a one step phenol-formaldehyde resin, a modified phenol-formaldehyde resin or a mixture thereof as a binder. By this method, a shaped active carbon can be obtained having increased mechanical strength without deterioration of the adsorption capacity.

Abstract: This invention relates to novel aromatic compounds and to novel aromatic polymers of the compounds. The compounds of the present invention are cyclic ethers of orthobisphenol having the following structure: ##STR1## wherein R is independently selected from the group of hydrogen, chlorine, bromine or fluorine. The compounds of the present invention may be easily polymerized and the polymers exhibit good stability at high temperatures. The polymers are useful as molding compounds in applications where phenol-aldehyde and phenol-ketone condensates are now used.