Abstract: Salts of fatty acids such as calcium stearate and lithium stearate are added to olefin polymer-based rotational molding compositions to provide rotational moldings with pinhole-free surfaces.

Abstract: A process for making film from a narrow molecular weight distribution low density ethylene hydrocarbon copolymer, which process comprises extruding said copolymer through a die gap of greater than about 50 mils. The film exhibits an excellent balance of optical and mechanical properties.

Abstract: An improved method for preparing ethylene polymers with certain supported chromium [II] catalysts wherein the improvement comprises employing said catalyst in the presence of phenolic antioxidant.

Abstract: A low pressure process for expanding the cross-section of a blank of thermoformable material between a pair of mold plates having perforation means therein, with the perforation means of one plate being selectively out of alignment with the perforation means in the second plate, the expansion leading to the formation of one or more voids having a partial vacuum or reduced pressure within the cross-section of the blank, which comprises venting the voids during the expansion of the cross-section so as to equilibrate the level of pressure within the voids with the level of pressure without the blank so as to thereby regulate the uniformity and integrity of the resulting cross-sectional geometry of the expanded blank.Products having an expanded cross-section are formed by such process.

Abstract: Supported bis-cyclopentadienyl chromium [II] catalysts are modified with compounds having in their structure the moiety ##STR1## in order to improve the toughness and impact strength of the resulting ethylene polymers made therewith.

Abstract: Supported bis-cyclopentadienyl chromium [II] catalysts are modified with compounds having in their structure the moiety ##STR1## IN ORDER TO IMPROVE THE TOUGHNESS AND IMPACT STRENGTH OF THE RESULTING ETHYLENE POLYMERS MADE THEREWITH.

Abstract: Supported bis-cyclopentadienyl chromium [II] catalysts are modified with compounds having in their structure the moiety ##STR1## IN ORDER TO IMPROVE THE TOUGHNESS AND IMPACT STRENGTH OF THE RESULTING ETHYLENE POLYMERS MADE THEREWITH.

Abstract: A semiconductive composition having controlled strippability from cross-linked ethylene polymer based insulation compositions and comprising chlorinated ethylene-vinyl acetate copolymer containing about 3 to 40 percent by weight of chlorine and conductive carbon black.

Abstract: A bristled article is integrally formed in an essentially one step low pressure process from a sheet of thermoformable material between a top and bottom mold surface. The bottom mold surface is smooth and the top mold surface is channeled, and the sheet, in a fused state, is pulled between the mold plates and while bonded thereto by hot tack adhesion, and bristles form at the points of contact with the top mold surface.The bristled articles are useful as brush devices, artificial turf, packaging material and the like.

Abstract: An environmentally degradable polymer based composition which has been exposed to actinic or ionizing radiation and which comprises an ethylene polymer base resin, and a synergistic combination of an auto-oxidative polymer or low molecular weight organic compound, certain polyvalent metal salts, and an antioxidant additive for the ethylene polymer; and a process for making such composition.

Abstract: An improved chromate ester catalyst useful for preparing, at relatively low temperatures, ethylene polymers which have a relatively lower molecular weight and which are more stable against oxidation is prepared by treating a silica supported chromate ester first with a phenol compound and then with a strong reducing agent.

Abstract: Ethylene polymerization catalyst which is .pi. allyl chromium compound in the chromium [II] valence state and supported on silica or silica-alumina, and a process for making such catalyst.

Abstract: Insulated wire or cable having primary insulation between copper conductor and moisture barrier filler and wherein the primary insulation comprises ethylene polymer having a density of about 0.928 to 0.955,Copper deactivating amounts of at least one organic compound which is an alkyl hydroxy phenyl alkanoyl hydrazide, and/or a substituted amido triazole, andAntioxidant effective quantities of at least one organic compound having a molecular weight of .gtoreq. 550 and which contains .gtoreq. four hindered phenolic groups per molecule thereof.

Abstract: A novel catalyst comprising the elements Mo, Bi, Fe, Si, Ni and/or Co and Ru and/or Sb, and, optionally Cl, and an oxidation process, is provided for oxidizing alpha, beta unsaturated monoolefins in the vapor phase with molecular oxygen to produce the corresponding alpha-beta unsaturated carboxylic acid and alpha-beta unsaturated aldehyde. The catalyst can also be used in corresponding ammoxidation reactions.

Abstract: Vulcanizable ethylene polymer based compositions which are susceptible to scorching when processed at elevated temperatures, prior to vulcanization, in the presence of bis(tertiary-butyl peroxy isopropyl) benzene and/or 2,5-dimethyl-2,5-di(tertiary butyl peroxy) hexane, are protected against such scorching by the incorporation therein of cumene hydroperoxide and/or tertiary butyl hydroperoxide.

Abstract: Vulcanizable ethylene polymer based compositions which are susceptible to scorching when processed at elevated temperatures, prior to vulcanization, in the presence of certain organic peroxide compounds, are protected against such scorching by the incorporation therein of certain organic hydroperoxide compounds and organic compounds containing at least three allyl groups.

Abstract: Bis(indenyl)- and bis(fluorenyl)-chromium [II] compounds are deposited on activated inorganic oxide supports to provide catalysts which are useful in the presence of hydrogen, alone, or with cyclopentadiene compounds, for the polymerization of ethylene in high yields. These catalysts exhibit good thermal stability and show a unique response to cyclopentadiene compounds which allows production of polymers having a relatively broad range of melt index values.

Abstract: A supported catalyst is used in the low pressure catalytic copolymerization of ethylene with C.sub.3 to C.sub.6 .alpha.-olefins in a fluid bed reactor to produce polymers having a density of less than 0.941 and a melt index of >0.0 to at least about 2.0. The supported catalyst contains about 0.05 to 3.0 weight % of chromium, about 1.5 to 9.0 weight % of titanium and >0.0 to about 2.5 weight % of fluorine.

Abstract: Ethylene is polymerized alone, or with other comonomers, under high pressure with oxygen and two or more organic initiators in a tubular reactor for the purposes of increasing the conversion of monomer to polymer and to produce polymer which has a low hexane extractables content, and which has, in the form of film, improved optical properties.

Abstract: Insulated wire or cable having primary insulation between copper conductor and moisture barrier filler and wherein the primary insulation comprises:Ethylene polymer having a density of about 0.928 to 0.955,Copper deactivating amounts of at least one organic compound which is an oxalyl dihydrazide, andAntioxidant effective quantities of at least one organic compound having a molecular weight of .gtoreq.550 and which contains 2 or 3 hindered phenolic groups per molecule thereof.