Abstract: Sulfurized isobutylene is reacted with a mild oxidizing agent under conditions sufficient to effect the appearance of new infra red frequency bands at 1300 cm.sup.-1 and 1030 cm.sup.-1 indicative of the formation of sulfoxides and sulfones and a liquid oxidized sulfurized isobutylene product soluble in a lubricating composition is recovered. The resulting purified product imparts improved bearing life when incorporated into lubricant compositions.

Abstract: A crowned packaging tray and, more particularly a high-strength, molded packaging tray for use in packaging meats, fish, poultry and other comestibles, and non-food commodities, which is adapted to be utilized in conjunction with a transparent overwrap film. The packaging tray is provided with a novel tray bottom wall incorporating a high-crowned center portion encompassed by a peripheral bottom rim providing a support surface for the tray. This raised high-crowned portion will provide for an increase in the strength of the tray, while holding up the packaged product for an enhanced aesthetic appearance thereof.

Abstract: A semi-continuouds, multi-stage polymerization process is provided for synthesizing a heat-sealable multi-layered composite particle latex. The multi-layered composite latex particles of this invention provide excellent oxygen and vapor barrier properties without hindering the desired surface properties, including high heat-sealing strength, low minimal seal temperature, excellent machinability, i.e. low blocking and low coefficient of friction. The latex particles of the present invention are formed as three-layered composite particles having an acrylic ester seed layer composed of a copolymer of methyl methacrylate and methyl acrylate. The latex particles have an intermediate core layer composed of a terpolymer having a high vinylidene chloride concentration, the other comonomers of the core layer include methyl acrylate and methacrylic acid.

Abstract: A liquid leak detector for above-ground tanks includes an upright standpipe connected to the tank so that the standpipe can be filled with liquid from the tank to the same level as the liquid in the tank. A pressure transducer is connected between the bottom of the tank and the bottom of the standpipe to measure the difference in pressure of the liquids in the tanks and standpipe. Any change in the liquid pressure at the bottom of the tank as a result of leakage from the tank will change the pressure differential on the pressure transducer. This changes the output of the transducer which can be recorded to indicate leakage from the tank.

Abstract: A method and apparatus for determining certain fluid flow parameters for naturally fractured media. Specifically provided is a method and apparatus to measure the flow rate, pressure drop, fracture aperture, fluid supply temperature and sample-loading force. A naturally fractured media core sample is obtained for testing and cut into a pair of core blocks having mating fractured forces. The fracture face of the core sample prepared in this manner, yields a more representative surface for flow study, eliminating the problem arising from the fact that most fractures cut across round core samples, resulting in an unnatural, elliptical surface for evaluation. A flow cell assembly is provided to receive the pair of core blocks and secure them during the measurement operation. The flow cell assembly permits adjustment of the fracture aperture to facilitate comprehensive evaluation.

Abstract: A waste container that utilizes a clock-timer circuit to actuate an alarm to remind a user to empty the container and prepare the contents for subsequent collection. The clock-timing circuit and signalling means can be an integral part of the container or affixed to the container by an adhesive or any other suitable fastening means. A preferred apparatus comprises a waste container, an audible signalling means, a clock-timer circuit for actuation of the signalling means at a predetermined time corresponding to the interval between trash collection service pick-ups and a housing for mounting the timing circuit and signalling means within. Also furnished is a method for providing a signal to prepare waste materials for collection comprising the steps of setting a clock-timer circuit affixed to a waste container for a predetermined period of time, providing an actuation pulse upon the expiration of the period of time and generating an alarm through the use of a signalling means affixed to the waste container.

Abstract: Films such as LLDPE extruded through a slot-die and drawn under high Deborah number conditions behave like elastic solids and exhibit draw resonance which is alleviated by heating the film after it exits the extruder, e.g., with radiant heaters.

Abstract: Disclosed are products derived from the reaction of amine or metal salts of N,N-diorganodithiocarbamic acids with alkylthiosulfinyl halides. These compositions are useful as antioxidants and antiwear additives in lubricating oil compositions.

Abstract: The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 -C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g. 250 to 1000 ppm of each of a fluorocarbon polymer, e.g. polyvinylidene fluoride, and of a polyalkylsiloxane, e.g. poly(methyl-octyl-siloxane), to reduce melt fracture, head pressure and extruder power.

Abstract: Styrene or other anionically polymerizable monomer is anionically homopolymerized in a dispersion using a non-solvent, e.g., hexane using three or more stages to obtain spherical microparticles, e.g., 2-5 microns, with a narrow size distribution.

Abstract: The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 --C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g., 0.02 to 2 weight percent ethylene-vinyl polymer to reduce melt fracture, head pressure and to obtain films having excellent anti-blocking characteristics. Optionally, diatomaceous earth is added to further reduce blocking.

Abstract: Blending a minor proportion of a copolymer of vinylidene fluoride and hexafluoropropylene with a major proportion of a methacrylate polymer such as polymethylmethacrylate improves the toughness of the methacrylate polymer and gives compositions suitable for molded articles.

Abstract: Terblends of a major proportion of LLDPE (linear low density polyethylene) and minor amounts of LMW-HDPE (high density polyethylene of low molecular weight) and of HMW-HDPE (high density polyethylene of high molecular weight) give blends which are processable at higher rates, give lower extruder back-pressure and result in films generally superior to those made from LLDPE alone.

Abstract: Composition and films of linear ethylene polymers such as linear low density polyethylene containing up to about 3 weight percent of a blend of polyphenylene oxide and styrene resin exhibit excellent physical properties particularly impact strength.

Abstract: The impact strength of containers made from foams of aromatic olefins such as polystyrene and poly-(para-methylstyrene) is improved by the addition of a small amount e.g., 2 to 25 weight percent of a polyethylene such as linear low density polyethylene. Meat trays made of such foams can be processed in automatic packaging equipment and exhibit reduced damage, such as cracking, in processing.

Abstract: The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 -C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g., 0.02 to 1 weight percent polyacetal fluoride to reduce melt fracture, head pressure and extruder torque.