Abstract: A unique high efficiency catalyst for the polymerization of ethylene has been developed based on the use of methanol treated magnesium oxide as support, an equimolar mixture of titanium tetrachloride and tetrabutyltitanate as titanium source impregnated on the support, and an organoaluminum compound as reducing agent. The polyethylene produced by this catalyst has narrow molecular weight distribution, high bulk density, high melt index, and minimum catalyst residue due to the high polymer to catalyst ratio.

Abstract: Thermoplastic molding compositions consist of:(a) 10-90% by weight copolymer of maleimide and styrene containing about 5-35% maleimide and 60-95% styrene; and(b) 10-90% by weight of a polycarbonate of a dihydric phenol and a derivative of carbonic acid.

Abstract: The technique uses an extruder for delivering a supply of softened thermoplastic resin material containing a foaming or expanding agent, the resin material being under pressure and therefore unexpanded in the extruder, but being delivered into an unconfined zone of lower pressure for partial expansion. The partially expanded resin material is drawn by a puller mechanism through a chilled shaping or sizing die of a cross sectional dimension smaller than that of the material in the unconfined zone. The material drawn into the sizing die continues its expansion in the interior of the profile with resultant development of porosity in the core of the profile while the surface layer is cooled and hardens as a substantially unexpanded structural shell.

Abstract: Articles of glass are coated with copolymers of ethylene and 2-norbornenes or terpolymers of ethylene, 2-norbornenes and 1-butene. The coating serves to reduce shatter of the glass and its scatter on breaking. Resin-coated bottles are especially useful for bottling carbonated beverages to prevent flying glass if the bottle is dropped or explodes.

Abstract: Ethylene-carbon monoxide copolymer compositions are stablized against degradation by the incorporation therein of manganous salts of phosphorus oxy acids.

Abstract: Olefin polymerization catalysts prepared by reducing transition metal compounds with an organometallic compound are rendered highly efficient by reacting excess organometallic compound with a deactivation agent, such as hydrogen chloride, prior to activation of the catalyst with organoaluminum compounds. Catalyst efficiencies of as high as 700,000 grams of polyethylene per gram of transition metal in the catalyst have been attained at reactor pressures of only 50 psig.

Abstract: Improved thermoplastic polyolefin films are provided with the desired improvements in certain properties to make them especially suitable for packaging fresh meat and other foods, as well as for packaging other products, by the use of selected additives to improve or maintain certain desired properties, such as, gloss, anti-fogging, tensile strength, tear resistance, cling and tack, low blocking (that is low, film to metal coefficient of friction), low water transmission, desired levels of permeability to oxygen and carbon dioxide, heat sealability at lower temperatures but with an adequate range (without burn through), and the like. A preferred composition, comprises a transparent thin polyethylene film with at least one additive and a shellac compound. A particularly preferred composition comprises a copolymer of low density polyethylene and vinyl acetate plus one or more additives, and a shellac material.

Abstract: A unique high efficiency catalyst has been developed for the polymerization of ethylene. The activity of the catalyst, which uses a mixed magnesium-aluminum alkyl as a reducing agent for tetrabutyltitanate, and hydrogen chloride to deactivate excess reducing agent, is dependent on a specific and unpredicted order of addition of catalyst components.

Abstract: Thermoplastic molding composition consists essentially of a blend of:A. 20-80% by weight of polymethyl methacrylate; andB. from about 20% to about 80% by weight of a copolymer of three components:(aa) a rubbery block polymer prepared in a stereospecific system using from 5 to 35% vinyl aromatic compound and from 65 to 95% conjugated alkadiene, said rubbery block copolymer constituting from 5% to 35% of the copolymer of three components.(bb) an amine nitrogen derivative of an ethylenically unsaturated dicarboxylic acid constituting from 5% to 35% of the copolymer of three components, and(cc) vinyl aromatic composition constituting from 60% to 90% of the copolymer of three components.

Abstract: Thermoplastic molding composition consists essentially of a blend of:A. 20-80% by weight of a copolymer comprising methyl methacrylate and styrene containing from 20% to 80% of methyl methacrylate and from 20% to 80% of styrene; andB. from about 20% to about 80% by weight of a copolymer comprising:(aa) an amine nitrogen derivative of an ethylenically unsaturated dicarboxylic acid constituting from 5% to 35% of the copolymer of B; and(bb) vinyl aromatic composition constituting from 60% to 95% of the copolymer of B;each of A and B having as an optional component of said copolymer(cc) a rubbery block polymer prepared in a stereospecific system using from 5 to 35% vinyl aromatic compound and from 65 to 95% conjugated alkadiene, said rubbery block copolymer constituting from 5% to 35% of its copolymer.

Abstract: The production of polymer beads by a suspension polymerization process in which a vinyl aromatic monomer having a free-radical generating catalyst dissolved therein is suspended in an aqueous medium with the aid of from 0.1 to 2.0 percent by weight, based on monomer, of a finely divided phosphate suspending agent in the presence of a modifier and heated to cause the monomer to polymerize into polymer beads is improved by the addition to the suspension of at least about 0.02 percent by weight based on monomer of certain aminoalkanesulfonic acids and N-substituted derivatives thereof. The process of the invention is especially applicable in the preparation of large polymer beads.

Abstract: A molding composition suitable for thermoplastic molding operations consists of a blend of:(a) 10-90% by weight of polymethyl methacrylate; and(b) 10-90% by weight of a copolymer derived by copolymerizing from about 5% to about 35% amino nitrogen derivative of an ethylenically unsaturated dicarboxylic acid, and from about 65% to 95% vinyl aromatic composition.

Abstract: Thermoplastic molding compositions consist of a blend of:A. 10-90% by weight of a polycarbonate of a dihydric phenol and a derivative of carbonic acid.B. 10-90% by weight copolymer of three components:(aa) a rubbery block polymer prepared in a stereospecific system using from 5 to 35% vinyl aromatic compound and from 65 to 95% conjugated alkyldiene,(bb) an amino nitrogen derivative of an ethylenically unsaturated dicarboxylic acid, and(cc) vinyl aromatic composition,Said copolymer containing from about 5% to about 35% rubbery block polymer, from about 5% to about 35% amino nitrogen derivative of an ethylenically unsaturated dicarboxylic acid, and from about 60% to 90% vinyl aromatic composition.

Abstract: Expandable styrene polymer particles having reduced flammability are made by incorporating from 0.1 to 15 weight per cent of non-polymeric organic halogen compounds into the polymer during impregnation of the polymer particles with a blowing agent in aqueous suspension. Temperatures greater than 90.degree. C., during the impregnation step, often cause degradation of the halogen compound and subsequent degradation of the polymer at the particle surface. The addition of certain hindered phenolic antioxidants, such as di-tert-butyl-p-cresol, stabilizes the halogen compounds in the suspension system to temperatures up to 125.degree. C.

Abstract: Expandable styrene polymer particles having reduced flammability are made by incorporating from 0.1 to 15 weight percent of non-polymeric organic halogen compounds into the polymer during impregnation of the polymer particles with a blowing agent in aqueous suspension. The addition of 0.001 to 0.5 weight percent of dialkyl tin maleates or fumarates during the impregnation step produces expandable styrene polymer particles with greatly improved molding characteristics such as reduced pruning tendency, increased mold fusion, and greater dimensional stability. Addition of a synergistic amount of 0.001 to 0.4 weight percent of a hindered phenolic antioxidant with the tin compounds gives improved molding characteristics with retention of polymer molecular weight.

Abstract: A cellular elastomeric product is prepared by the curing of a froth prepared by whipping air into an aqueous dispersion of colloidal elastomer, said aqueous dispersion containing a latex frothing agent consisting of an aqueous solution containing about 70% water and about 25% magnesium di(lauryl sulfate), about 2.5% polyalkoxyglycerol having about eight alkoxy groups per hydroxyl and about 2.5% of a quaternary, dihydroimidazole derivative, there being a fatty acid carbon chain attached as the only carbon-carbon linkage for the carbon between the two nitrogens of the imidazole ring, the quaternary nitrogen partaking of the nature of a quaternary sodium glycinate having at such quaternary nitrogen both an alkhydroxy group and said dihydroimidazole ring.

Abstract: Improved cold patching of pavements, drives, walks, or the like, is obtained by applying to or mixing with the patching material a solution of thermoplastic polymeric resin. When the solution has evaporated or the solvent is volatilized, the patch and the surrounding area are reinforced and more thoroughly bonded together. If the area requiring repair has appreciable depth, it is preferable that the margins of the repair area receive an application of the polymeric resin solution so that the bond between the patch and the adjacent area is reinforced and made more secure.

Abstract: A rubber-modified copolymer blend having enhanced toughness is prepared from a block copolymer rubber and a rubber-modified non-equimolar copolymer of ethylenically unsaturated dicarboxylic acids, or their derivatives, with one or more copolymerizable monomers.

Abstract: This invention relates to certain novel articles formed from polypropylene compositions, and more particularly to articles produced by forming polypropylene compositions into a predetermined configuration and plating with a coating of one or more metals. The novel plated articles prepared from polypropylene compositions of the present invention exhibit greatly improved bonding between the metal coating and the polypropylene surface. The polypropylene composition contains a polyhydroxy aromatic compound and a resinous material. The composition may optionally contain a nucleating agent.