Abstract: Blends containing a polyetherimide and from about 8 to about 20 wt. % of a modifier formulation comprising an acrylate rubber and a polycarbonate, and a method for improving the ESCR properties of polyetherimides.

Abstract: Oxygen-scavenging compositions comprising an oxidizable metal component and a solid, halogen-free, acidifying electrolyte component and, optionally, a water-absorbant binder and/or a polymeric resin exhibit good oxygen-scavenging performance and oxidation efficiency. The compositions can be used as an oxygen absorbent in packets or in combination with thermoplastic resins melt-fabricated into a wide variety of oxygen-scavenging packaging articles.

Abstract: The alpha-olefin content of mixed hydrocarbon streams is selectively utilized to produce trialkylaluminum compounds in which the alkyl groups are linear primary alkyl groups. This selective utilization is accomplished by use of a specific, highly selective low residence-time, low isomerization catalytic displacement reaction. In addition, when alpha-olefins are the desired end product, a second low residence-time catalytic displacement reaction is utilized whereby high purity alpha olefins are produced.

Abstract: A monoolefin oligomerization process which gives high yields of dimer and trimer at high monoolefin conversions in a single stage reaction is described. The process involves contacting a C.sub.6-20 vinyl olefin with a catalyst comprising boron trifluoride and from 0.075 to 0.5 mol %, based on the total quantity of monoolefin being used, of an alcohol catalyst promoter. The oligomerization is performed at a temperature below about 40.degree. C. and under a pressurized atmosphere of boron trifluoride in the range of 2 to 4 bars gauge until the monoolefin conversion is at least 95% and the combined total of dimer and trimer in the liquid reaction mixture is at least 60% by weight.

Abstract: A process disclosed for the separation, purification and recovery of an unsaturated hydrocarbon from its mixture with at least one other material using a facilitated transport liquid membrane system.

Abstract: Described is a process for isomerizing .alpha.-olefin to produce olefinic oil having a viscosity at 100.degree. C. of no more than about 1.6 cSt, a viscosity at 40.degree. C. of no more than about 3.8 cSt, and a pour point of 0.degree. C. or lower, preferably -10.degree. C. or lower. The process comprises contacting the .alpha.-olefin having from about 14 to about 20 carbon atoms with a catalytic quantity of nonmetallic sulfonic or perfluorosulfonic acid resin catalyst under identified isomerization conditions, thereby producing deep internal olefin having the desired combination of physical properties.

Abstract: A process for producing an vinylidene olefin of the formula ##STR1## where R.sup.1 and R.sup.2 are the same or different and are hydrogen or alkyl and m is an integer of from 0 to 18, with a catalytically effective amount of a mixture of i) an aluminum compound of the formula R.sup.4.sub.n Al(OR.sup.5).sub.p where R.sup.4 and R.sup.5 are the same or different and are alkyl, n is an integer from 0.75 to 2.75, and p is an integer from 0.25 to 2.25, the sum of n and p being 3, at a temperature of from about 120.degree. C. to about 200.degree. C. whereby a major amount of said vinylidene and deep internal olefin dimer is produced and only a minor amount of a beta internal olefin isomer.

Abstract: The present invention provides an improved produce bag comprising an open, mesh-like fabric suitable for processing on automated bagmaking equipment. The bag has a sealed end, an open end capable of being sealed after filling of the bag and a longitudinal, heat-sealed seam extending from end to end. An optional print band or label can be heat sealed to the bag to reinforce the longitudinal heat-sealed seam.

Abstract: Alpha-olefin oligomer is prepared by contacting an alpha-olefin monomer which contains from about 8 to about 16 carbon atoms with a heterogeneous catalyst system formed from (i) a solid olefin polymer having a linear backbone and a plurality of pendant omega-hydroxyalkyl groups, and (ii) a boron trihalide, preferably BF.sub.3. The catalyst system is stable and very reactive at relatively high temperatures, and the solid polymer of the catalyst system can be recovered and reused repeatedly in batch-type operations and can be used for long periods of time in continuous or semi-continuous operations.

Abstract: Ethylene is trimerized to form 1-hexene by using a catalyst comprising an aluminoxane and polydentate phosphine, arsine, and/or stibine coordination complex of a chromium salt. Catalysts, complexes, and ligands enabling production of 1-hexene in extremely high yields and purity are also described.

Abstract: BF.sub.3 is vaporized from specified crude polyolefin reaction product mixture in a vaporization zone at a temperature insufficient to decompose BF.sub.3 or any BF.sub.3 promoter complex in the mixture, and the vaporized BF.sub.3 may be recovered directly. Further, a process for the oligomerization of a liquid olefin composition and recovery of BF.sub.3 is described in which inert volatile material present in a liquid olefin composition is removed from the composition by vaporization, forming a degassed liquid olefin composition free of inert volatile material. The degassed liquid olefin composition is then contacted in a reaction zone with BF.sub.3 under conditions to oligomerize the olefin, forming crude polyolefin oligomerization reaction product mixture containing dissolved BF.sub.3, which may be treated as described.

Abstract: A catalyst composition effective for isomerizing alpha-olefin to internal olefin and a process for conducting such isomerization using the catalyst composition are described. The catalyst comprises the combination of an alkyl aluminum alkoxide and a cobalt salt of an organic carboxylic acid or reduced form of such cobalt salt wherein the number of alkoxide groups in the alkyl aluminum alkoxide is sufficiently greater than 1 and sufficiently less than 3 per aluminum atom to provide an active catalyst for catalyzing such isomerization. Typically the alkyl aluminum alkoxide has the formula R.sup.3.sub.n Al(OR.sup.4).sub.p where R.sup.3 and R.sup.4 are the same or different and are alkyl, n is from 0.75 to 1.85, p is from 1.15 to 2.25 and the sum of n and p is 3. The isomerization process using such catalysts proceeds rapidly and requires no addition of hydrogen to enhance the reaction.

Abstract: A process for deactivating a nickel, cobalt, or nickel and cobalt displacement catalyst during a reaction wherein an alkyl group is displaced from a trialkyl aluminum compound in a reaction mixture containing said catalyst is disclosed. The process involves adding a deactivating amount of a catalyst poison containing silver, silver compounds, silver complexes, thallium, thallium compounds, thallium complexes, or mixtures thereof to the reaction mixture after the displacement has proceeded to the desired extent.

Abstract: The thermal stability of flame retardant, high temperature polyamides containing an organohalogen flame-retardant such as brominated polystyrene in combination with an antimony compound such as sodium antimonate during molding and similar melt fabrication operations is markedly improved when further combined with a minor amount of calcium oxide. The thermal stability of these compositions are much improved over analogous flame retardant polyamides formulated with magnesium oxide and/or zinc oxide.

Abstract: Electrically conductive tape yarns of two or more layers comprising thermoplastic polymer resin and electrically conductive particles, a process for making such tapes and fabrics comprising such tape yarns are disclosed.

Abstract: Improved high temperature polyamides, and particularly partially aromatic polyamides, containing less than about 40 .mu.eq/g carboxylic acid endgroups, when stabilized with a copper-containing thermal stabilizer, the polyamides exhibit improved thermal oxidative stability.

Abstract: Electrically conductive tape yarns of two or more layers comprising thermoplastic polymer resin and electrically conductive particles are prepared by a process comprising extruding a multilayer film containing at least one electrically conductive layer and at least one layer substantially free of electrically conductive particles, quenching the film, slitting the film into tapes and orienting the film before or after slitting.

Abstract: Self-reinforcing, pitch-based carbon articles having a unique combination of excellent thermal conductivity and outstanding mechanical properties are produced by carbonizing an acid-treated, mesophase pitch fiber preform. The carbon articles having varying degrees of porosity are particularly desirable for use in thermal management and stiffness applications, and in carbon vapor infiltration processes employed in making complex solid carbon articles.

Abstract: Alpha-olefins enriched in 1-hexene are prepared by oligomerizing ethylene in the presence of a catalyst comprising (a) a chromium complex containing a coordinating polydentate ligand and, (b) an aluminoxane, in an organic solvent.

Abstract: Oxygen-scavenging compositions comprising an oxidizable metal component, an electrolyte component and a solid, non-electrolytic, acidifying component and, optionally, a water-absorbant binder and/or a polymeric resin exhibit good oxygen-scavenging performance with improved oxidation efficiency relative to compositions containing oxidizable metal component and either an electrolyte or acidifying component but not both. The compositions can be used as an oxygen absorbent in packets or in combination with thermoplastic resins melt-fabricated into a wide variety of oxygen-scavenging packaging articles.