Abstract: Flexible polyurethane foam having reduced tendency to form burning embers when it is ignited and burned is provided by incorporating into the reaction mixture before foaming a derivative of melamine wherein one or more hydrogens have been replaced by hydroxymethyl and/or lower alkoxymethyl groups.In one embodiment, flexible polyurethane foams of increased flame retardance are also provided, by also incorporating a halogenated phosphorus ester into the reaction mixture before foaming.

Abstract: Adhesive polyamide resin compositions, such as hot melts, containing conventional components are improved by inclusion of a normally solid, homogeneous copolymer of ethylene and an unsaturated carboxylic acid having an acid number of at least about 100 and a number average molecular weight between 500 and 5,000.

Abstract: In the process for the gentle degasification of coagulation-sensitive PVC latices in a confined space under reduced pressure and stirring at elevated temperatures with steam injection onto the latex surface, the improvement consisting essentially of conducting said degasification at a selected temperature from 50.degree. C to 80.degree. C at a pressure corresponding to the boiling pressure of water at the selected temperature, stirring said latex by an inclined stirrer whereby a rolling action of said latex in said confined space is effected and introducing said steam into the gas space above said latex but directed along the surface of the confined space.

Abstract: A water-based coating composition which may be air dried to form durable, fire resistant coatings includes dispersed vinylidene fluoride polymer particles, emulsified liquid epoxy resin and a dissolved emulsifying agent for said epoxy resin which agent is also capable of rapidly curing the epoxy resin upon removal of the water from the composition.

Abstract: Terpolymer emulsions comprising (1) an .alpha.,.beta.-unsaturated carboxylic acid (2) an alkyl ester of an .alpha.,.beta.-unsaturated carboxylic acid, and (3) an amide of an .alpha.,.beta.-unsaturated carboxylic acid or styrene or a derivative thereof of the formula ##STR1## in which R.sub.2 is hydrogen, methyl or ethyl are useful as thickening agents, particularly in butadiene-styrene latices.

Abstract: 2-Mercapto phenol and/or 4-mercapto phenol are reacted with compounds containing olefinic unsaturation, for example, styrene and isobutylene, to form alkylthio phenolic antioxidants such as 2,6-di-tert.butyl-4-(tert.butylthio) phenol and 2,6-di(.alpha.-phenylethyl)-4-(.alpha.-phenylethylthio) phenol.

Abstract: Low pressure molding compositions comprising a thermosetting resin and a thermoplastic resin are thickened with a combination thickening agent within a specific concentration range to retard rapid initial thickening of the molding compositions.

Abstract: A storage stable polyester based polyurethane composition is provided which contains from about 0.05 to 0.75 percent by weight of an organic epoxide compound which has a molecular weight of not less than 60.

Abstract: A radiation-curable aqueous emulsion coating composition which cures to provide a nonadherent surface is provided by emulsifying droplets of liquid alkyl hydrogen polysiloxane in water, the water having dispersed therein a radiation-curable polyethylenically unsaturated tertiary amine, such as an amine polyacrylate, at least partially neutralized with a solubilizing acid. The aqueous emulsion preferably includes a photosensitizer rendering the composition curable with ultraviolet light.

Abstract: Relatively water insoluble hydroxy functional monoethylenic polyethers or polyesters of monoethylenic carboxylic acids or hydroxy aklys esters thereof are formed by adducting the monoethylenic acid or its hydroxy ester with an anhydride selected from monoepoxides, lactones, or mixtures thereof in the presence of a Lewis acid catalyst, such as BF.sub.3 etherate, at a temperature below that at which the unsaturation is consumed, typically about 30.degree.-70.degree. C. These adducts are of low volatility and of low toxicity and can be radiation cured in admixture with polyacrylates to form coatings having improved resistance to elevated temperature exposure.

Abstract: Poly (oxypropylene-oxyethylene) polyols containing predetermined amounts of both internal and cap ethylene oxide are employed to form polymer/polyols which exhibit enhanced compatibility for low molcular weight chain extenders such as, for example, ethylene glycol and butanediol. Polyurethane elastomers having satisfactory modulus characteristics are prepared from the polymer/polyol-chain extender mixture, and the resulting elastomers possess unexpected hydrolytic stability.

Abstract: A method of forming an impression sleeve on an impression packer for use in obtaining impressions in wells, the impression sleeve being formed of a mixture of partially cured synthetic nitrile rubber, natural rubber smoked sheet, silica powder and rubber processing oil.

Abstract: Aqueous polymer microsuspensions having controlled particle size and narrow particle size distribution are prepared by a continuous process comprising the steps of (a) forming a heterogeneous composition having a discontinuous aqueous phase and a continuous polymer phase; and (b) converting the resulting polymer-continuous heterogeneous composition to a water-continuous heterogeneous composition.

Abstract: Finely-divided dispersed solids are prepared by the emulsion polymerization in the presence of a free radical catalyst of a major amount of an ethylenically unsaturated monomer or mixture of monomers and a minor amount of a hydroxy-terminated organic compound having from one to eight hydroxyl groups, an oxyethylene content of from about 15 to 80 weight percent, a hydroxyl equivalent weight of from 250 to 10,000 and containing a polymerizable carbon-to-carbon double bond. The resulting polymeric solids are particularly useful in the preparation of reinforced polymer compositions.

Abstract: An emulsion composition prepared by the emulsion polymerization of a polymerizable vinyl monomer in the presence of an emulsifier characterized in that the emulsifier is a neutralized copolymer of (A) a monomer prepared by being allowed at least one glycidyl ester of arcylic acid and methacrylic acid to react with at least one fatty acid of drying oil fatty acid and semi-drying oil fatty acid, (B) .alpha.,.beta.-ethylenically unsaturated acid and (C) an unsaturated monomer containing substantially no carboxyl group and having a Q value of at least 0.1 as determined by Q-e theory.

Abstract: The invention provides means for controlling the degradation of vinyl polymers by incorporating therein at least one non-ionic organo-soluble complex of a metal having an atomic number from 22 to 29, 40 to 47 or 57 to 79, the complex being activatable by light and optionally heat to give a more photo-oxidatively active form of the said metal, in an amount such as to cause degradation of the polymer at the end of the desired life of the composition.

Abstract: Molding compositions, based on unsaturated polyester resins, unsaturated monomers, catalysts, inorganic and/or organic fillers and/or reinforcing agents, dyestuffs and/or pigments, lubricants and optionally inhibitors, containing a siloxane of the formula ##STR1## wherein A IS 0 OR 1b is a number from 1 to 500, provided that when a is 0, b must be equal to or greater than 3 and the compound is a cyclosiloxane,R.sup.1 is hydrogen, alkyl or trimethylsilyl,R.sup.2 is alkyl of 8 to 32 carbon atoms, --R.sup.4 OCOR.sup.5, or --R.sup.4 OR.sup.6, where R.sup.4 is a bivalent radical, R.sup.5 is alkyl of 12 to 22 carbon atoms and R.sup.6 is alkyl of 8 to 22 carbon atoms, provided that up to 80 mole % of the above-mentioned radicals defining R.sup.2 may be methyl and provided further that at least one R.sup.2 per molecule is other than methyl, andR.sup.

Abstract: High solids, low energy cure coating compositions of aliphatic polyepoxides, monocarboxylic acid compounds as initiator and stannous salts as catalysts.

Abstract: Disclosed herein are aqueous dispersions of blocked hydrophilic polyether urethane prepolymers and codispersions thereof with synthetic polymer latices. Also disclosed are methods of preparing the dispersions as well as polyurethane coatings and films prepared therewith. The dispersion/codispersions are characterized by good mechanical stability and resistance to freeze - thaw cycles. Coatings, films and impregnated articles prepared therefrom possess good physical properties. Coatings and films prepared from codispersions containing acrylic latex possess physical properties, chemical solvent resistance, etc. comparable to solvent-based urethanes.

Abstract: According to a preferred practice of the invention, thermoset polyurethanes are molded from a mixture of solid particles of hydroquinone di-(beta-hydroxyethyl)ether (HQEE) and zinc stearate dispersed in a liquid mixture of a polyether polyol and a liquid form of diphenylmethane diisocyanate. The use of the HQEE chain extender and the zinc stearate catalyst provides a unique one-shot molding mixture that is relatively unreactive at room temperature, but polymerizes and cures rapidly upon heating. It has a pot life of at least several hours and is suitable for use in injection molding equipment generally used in processing thermoplastic material.