Abstract: A selected group of N-(oxazolidinothio) imides are active as scorch retarders without causing bloom in both unsaturated elastomers and elastomers with a slight degree of unsaturation.

Abstract: A method for enhancing the thermal stability of polymeric compositions containing inorganic fillers and conventional stabilizers by adding as filler deactivator normal and overbased ammonium, alkali metal and alkaline earth metal salt of monoalkyl- and dialkylnaphthalenesulfonic acid and stabilized compositions thereof.

Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of a salt of a tetrahydrocarbyl borate e.g., sodium tetraphenyl borate, resists combustion upon exposure to a low temperature ignition source.

Abstract: This invention is concerned with a new class of flame retardant polycarbonate compositions. More particularly, the invention is concerned with admixtures of an aromatic polycarbonate and a flame retardant additive combination consisting of a halogenated organic compound and an alkali or alkaline earth metal salt of an inorganic sulfur compound. The flame retardant polycarbonates can be molded or formed into flame retardant articles such as films, sheets, fibers, laminates or reinforced plastics by conventional techniques.

Abstract: Mixtures of (a) copolymers of ethylene and tetrafluoroethylene, which in addition optionally contain up to 10 mole % of units of at least one ethylenically mono-unsaturated monomer copolymerizable with tetrafluoroethylene, with (b) phosphorus acids which in one of their tautomeric forms contain 2 or 3 oxygen atoms and 1 or 2 hydrogen atoms directly bonded to each phosphorus atom, or with salts of such acids, are described. These mixtures possess improved heat stability and can, where appropriate with interpolation of a melt granulation process, be used, in particular, for the coating of metals. Component (b) is added to the copolymer (a) in the dry form or preferably in the form of a solution during working up, and in particular is added either to the pulverulent copolymer or, more especially, to a moist product, isolated from dispersions, after the last washing process.

Abstract: This invention relates to oriented polyester shaped, molded, or formed objects having improved ultraviolet stability and to a process for producing the same and to compositions used in making such objects. More particularly, the invention relates to an oriented linear polyester film, fiber, foils, sheets, and other shaped, molded, or formed objects prepared from polyester compositions containing multichromophoric ultraviolet stabilizers which when oriented provide objects having improved weatherability. Multichromophoric ultraviolet stabilizers are those stabilizers which contain two or more moieties which, if isolated from one another, absorb a portion of the ultraviolet spectrum between 280 nm and 400 nm or an aromatic ester comprised of one or more of the above moieties and which on absorption of light the ester rearranges to a moiety which absorbs between 280 nm and 400 nm.

Abstract: Polymeric polyesters containing a 2,2,6,6-tetralkyl piperidine moiety in the repeating unit are disclosed as light stabilizers for polymers subject to degradation by ultra-violet light.

Abstract: A flame retardant for imparting excellent flame retardancy to polyamides used as engineering plastics, is a reaction product obtained by reacting a benzenesulfonic acid type compound having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 respectively represent H, SO.sub.3 H, NH.sub.2, COOH, OH, CN or NO.sub.2, with dicyandiamide or melamine.

Abstract: Improvement in the weathering properties of polyolefin resins has been achieved by intimate compositions comprising Ziegler-process crystalline polyolefins containing halogen-magnesium compounds as catalytic carrier residues, and organic phosphorus compounds such as organic phosphites. The compositions may contain auxiliary components normally used in polyolefin resins; antioxidants and/or ultraviolet absorbers are especially useful.

Abstract: Method of preparing films of acrylonitrile polymer exhibiting very high tensile strength, stiffness, optical clarity, and outstanding gas barrier properties. Method entails extruding a hot, concentrated solution of said polymer in a solvent therefor that is water-soluble, e.g., dimethyl sulfoxide, onto a film-supporting surface, e.g., a flat surface, or a drum, which, preferably, has a low energy surface such as provided by wetting the surface with aqueous dimethyl sulfoxide, or coated with polytetrafluoroethylene, or other suitable means to thereby form a film. The resulting film is then contacted with an aqueous medium, e.g., water to remove the solvent (e.g., dimethyl sulfoxide) and partially replace it with water, this treatment being effected under conditions that will prevent the film from curling or puckering. The resulting film is composed essentially of acrylonitrile polymer and water, and is ignition resistant.

Abstract: Polycarbonate resins which contain sufficient halogenated phenolic residues to impart fire retardant characteristics to articles molded therefrom are stabilized by the addition of a hindered phenol selected from the group consisting of a high molecular weight hindered phenol phosphate, a high molecular weight hindered phenol cyanurate, an ester of a hindered phenolic carboxylic acid and an alcohol having 10-26 carbon atoms, and the reaction of a hindered phenol and an aldehyde. The polycarbonates with the stabilizers of the invention exhibit improved melt flow stabilities and hydrolytic aging characteristics over conventionally stabilized polycarbonates and in most cases over unstabilized polycarbonates.

Abstract: Flame retardant poly(butyleneterephthalate) composiitions are prepared by incorporating into the polymer a combination of a pentaerythrityl phosphonate and melamine pyrophosphate.

Abstract: Polyphenylene ether resin compositions are flame retarded by using a combination of a phosphine oxide and a phosphonate in a weight ratio of about 1:3 to 3:1.

Abstract: Polyesters containing a freely or chemically incorporated heat stabilizing agent which is a phosphonate of the chemical formula: ##STR1## in which R.sub.1 and R.sub.2 may be identical or different and describe an alkyl radical with 1 to 4 carbon atoms, and in which X represents ##STR2## in amounts representing 10 to 400 ppm phosphorus.

Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of an aromatic bis(cyclic phosphite) such as 2,2'---(1-methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyloxy)]bis(5,5 -dimethyl-1,3,2-dioxaphosphorinane) exhibits improved processability and thermal stability.

Abstract: A stabilized polycarbonate resin composition comprising a polycarbonate resin and a benzenephosphonate of the general formula ##STR1## wherein R.sub.1 and R.sub.2, independently from each other, are selected from the class consisting of hydrogen, alkyl groups having 1 to 22 carbon atoms and cycloalkyl groups having 5 to 10 carbon atoms, at least one of R.sub.1 and R.sub.2 being other than hydrogen. A stabilized colored polycarbonate resin composition is also provided by further incorporating a pigment and/or dye.

Abstract: A hardenable resin composition (or a component thereof) containing as a fire retardant ingredient particulate aluminium hydroxide wherein 10 to 30% by weight of the particles have a diameter less than 1 micron, 45 to 75% by weight of the particles have a diameter in the range from 38 to 150 microns and less than 20% by weight of the particles have a diameter in the range from 1 to 38 microns. The invention includes a preferred blend of aluminium hydroxide.

Abstract: What is disclosed are organopolysiloxane compositions that are curable to solid elastomers at room temperature and which exhibit mold resistance due to the incorporation of 2-(4-thiazolyl)benzimidazole and certain organic surfactants.

Abstract: Thermally stable polycarbonate compositions are obtained by admixing with a high molecular weight aromatic polycarbonate resin a stabilizing amount of a phosphonite oxetane.

Abstract: A flexible polyurethane foam is provided which is fire retardant and non-dripping upon exposure to flame. The flexible polyurethane foam is prepared by the reaction of a polyol, an isocyanate and a protein.