Abstract: Anaerobic compositions are disclosed which employ meta-toluidine compounds as activators.

Abstract: Small amounts of an aluminum alkyl or a dihydrocarbylmagnesium compound are used in slurry olefin polymerization employing a silica supported chromium catalyst in order to reduce the induction period and increase catalyst activity while having only a modest effect on polymer properties.

Abstract: A novel polymer comprising the reaction product of a first vinyl monomer and a second vinyl monomer which is an alkenyl succinic anhydride having the formula: ##STR1## These polymers are useful as epoxy curatives, boiler scale removers, detergent builders, thickeners and coatings.

Abstract: A process for preparing copolymers of acetylene and conjugated diene compounds by copolymerization of acetylene with at least one conjugated diene compound in the presence of a catalyst composition in a reactor, characterized in that the catalyst composition comprises a dialkyl aluminum halide, an organic nickel compound and an active hydrogen compound, of which the molar concentrations have the following relationships:[Al]=2[Ni]+[H][Al]/[Ni]>4wherein [Al], [Ni] and [H] represent respectively the molar concentrations of the dialkyl aluminum halide, of the organic nickel compound and of the active hydrogen compound, whereby the copolymer was obtained in a good yield without by-production of any gel material.

Abstract: A surface treatment for ethylene/vinyl acetate copolymer film resulting in an elastomeric, heat sealable film which retains its transparency after release from 200 percent elongation. The treatment comprises irradiation and controlled surface hydrolysis and, optionally, subsequent attachment of mineral particulates to the surface of the film with or without the use of coupling agents.

Abstract: A process for the production of modified polypropylene particles by polymerizing vinyl monomers in aqueous suspension wherein (a) an aqueous suspension is prepared which, based on 100 to 2000 parts by weight of water, contains 100 parts by weight of polypropylene particles, 4 to 30 parts by weight of a polar vinyl monomer and based on 100 parts by weight of the monomer, 0.1 to 10 parts by weight of a radical chain polymerization initiator which has a half life of at least 2 h at a temperature of 80.degree. to 135.degree. C. and 10 to 1200 parts by weight of an organic solvent which is capable of swelling polypropylene, of which the boiling point at 760 Torr is at least 100.degree. C. and which is miscible with the monomers in any proportion; (b) the aqueous suspension is heated without decomposition of the initiator, the polypropylene being swollen and the monomer penetrating into the polypropylene, after which (c) the aqueous suspension is kept at temperatures of .gtoreq.85.degree. C.

Abstract: Copolymers having a backbone of alternating polymer blocks and phosphorus units and their method of production are disclosed. These alternating copolymers exhibit excellent fire retardancy.

Abstract: A high char yielding matrix resin for use in fabricating carbon-carbon composites comprised of a polymerizable mixture of a diethynylbenzene monomer and an ethynylpyrene monomer.

Abstract: A chromium catalyst supported on a silica-containing base is prepared having chromium present in both the hexavalent state and a lower valent state by anhydrously impregnating a second chromium compound onto the base which already has a chromium compound having a different chromium valence than said second chromium compound. For instance, a silica titanium cogel containing a chromium compound calcined to give hexavalent chromium can be anhydrously impregnated with a .pi.-bonded organochromium compound such as dibenzene chromium or dicumene chromium. Resulting polymers have broad molecular weight distribution and can be made in slurry systems at a sufficiently high melt flow to be useful in applications such as blow molding of bottles and other hollow articles.

Abstract: Copolymers or graft copolymers of from 5 to 95% by weight of .alpha.-olefins corresponding to the following general formula (A): ##STR1## wherein R.sup.1 represents alkyl having from 1 to 16 carbon atoms or phenyl; and from 5 to 95% by weight of straight-chain, branch-chain or crosslinked 1,4-polyenes, and a process for the preparation of such polymers, wherein one or more .alpha.-olefins (A) are reacted with a solid catalytic complex based on TiCl.sub.3 and aluminum compounds corresponding to the following general formula (C):Al R.sup.2.sub.n X.sub.3-n (C)wherein R.sup.2 represents C.sub.1 -C.sub.18 alkyl; X represents halogen, preferably chlorine; and 0<n.ltoreq.3; in the presence of a solution of polyene (B) in an inert solvent or in the presence of a gel of polyene (B) swelled in an inert solvent, and the final linkage between component (A) and component (B) is produced at the end of polymerization by the addition of a dihalogen aluminum alkylene corresponding to the following general formula (D):X.

Abstract: The disclosure of this application is directed to a composition, devoid of added mineral filler, comprising an ethylene polymer and an organo titanate as a water treeing inhibitor. The compositions can be extruded about electrical conductors providing insulation thereon which is resistant to deterioration in the presence of moisture and an electrical field.

Abstract: A granular crosslinked copolymer suitable as a high speed liquid chromatographic packing and especially as a gel permeation chromatographic packing is disclosed. In a preferred embodiment of the invention the packing is a copolymer essentially consisting of (I) units of at least one vinyl alcohol, (II) units of at least one vinyl ester of a carboxylic acid and (III) units of at least one crosslinking monomer having an isocyanurate ring, the ratio of the units (I) to the units (II) in the copolymer being within the range satisfying the following equation:about 0.4.ltoreq.a/(a+b).ltoreq.about 0.8whereina and b are molar ratios of the units (I) and (II), respectively, in the total units (I), (II) and (III) of the copolymer,and a process for preparing the same by suspension polymerization is disclosed.

Abstract: A chromium salt such as ammonium chromate or ammonium dichromate, which is normally insoluble in nonaqueous solvents which do not easily rehydrate the silica surface is solubilized, for instance by treating it with a crown ether, and impregnated onto a particulate support from a nonaqueous solvent which does not easily rehydrate the silica. The resulting composition is then activated in an oxygen ambient such as air in a conventional manner and then utilized as a catalyst for polymerization reactions such as the production of polyolefins.

Abstract: In accordance with one embodiment of this invention, a silica hydrogel is prepared and dried in the presence of a pore preserving agent after which a titanium compound is anhydrously incorporated therewith. In accordance with the second embodiment of this invention, a silica hydrogel or a silica xerogel is impregnated with an aqueous organic acid solution of a substituted or unsubstituted titanium acetylacetonate. The invention allows the use of conventional drying to produce a silica exhibiting characteristics associated with azeotrope dried titanium-silica for use as a support for chromium catalysts. The resulting catalysts are broadly applicable in the polymerization of olefins and are of particular utility in the slurry polymerization of olefins, particularly predominantly ethylene monomer.

Abstract: A saponified ethylene-vinyl acetate copolymer composition, improved in behavior in the molten state, which comprises: a saponified ethylene-vinyl acetate copolymer, with an ethylene content of 20-80 mole percent and a saponification degree of at least 85 percent, and 0.00005 to 0.005 percent by weight, based on said copolymer, of manganese, copper or mixtures thereof; said composition, when extracted with pure water, giving an acidic extract, is disclosed, along with a method of making the same.

Abstract: In a process for producing propylene copolymer containing about 80 to 99 mol % propylene and about 1 to 20 mol % ethylene and/or an .alpha.-olefin having 4 to 18 carbon atoms using a Ziegler-Natta catalyst, the improvement which comprises said Ziegler-Natta catalyst comprising:(A) titanium trichloride prepared by reducing titanium tetrachloride with an organoaluminum compound and activating the product; and(B) an organoaluminum compound;with the molar ratio of (B)/(A) being about 20 to 100.

Abstract: A thermoplastic, substantially resinous, unsaturated, random copolymer of ethylene, propylene or 4-methyl-1-pentene with a branched 1,4-diene of the formula ##STR1## wherein R.sup.1 is an alkyl group of a maximum of 8 carbon atoms, and each of R.sup.2 and R.sup.3 is hydrogen or an alkyl of a maximum of 8 carbon atoms, exclusive of the case where both R.sup.2 and R.sup.3 are both hydrogen.

Abstract: In a process for producing a rubber olefin copolymer which comprises random copolymerization of at least two olefins in the presence of a catalyst composed of (A) a titanium compound and (B) an organometallic compound of a metal of Groups I to III of the periodic table, the improvement wherein the titanium compound (A) is a liquid product obtained by treating a titanium tetrahalide of the general formula TiX.sub.4 in which X represents Cl, Br or I in a hydrocarbon, a halogenated hydrocarbon or a mixture of both in the presence of an ether with at least one member selected from the group consisting of (1) an organoaluminum compound, (2) an organomagnesium compound and (3) a combination of hydrogen and at least one metal or metal compound selected from the group consisting of metals of Group IB, IIB, IVB and VIII of the periodic table, compounds of metals of Group VIII of the periodic table, cuprous chloride, titanium hydride and zirconium hydride.

Abstract: Heterogeneous ethylene based hydrocarbon copolymers having high tear strength properties in film form, formed from ethylene, C.sub.3-4 monomer and C.sub.5-8 monomer with a molar ratio in the polymer of (C.sub.3-4 /C.sub.2) of about 0.006 to 0.09, a (C.sub.5-8 /C.sub.2) ratio of about 0.003 to 0.07 and having a Chain Branch Factor of about 0.2 to 0.8 and a narrow molecular weight distribution; a gas phase process for making such polymers, and film made from such polymers.

Abstract: An antimicrobial solution of a microbiologically active organo sulfonyl ethylene dissolved in an organo phosphorus compound selected from the group consisting of organophosphites and organophosphonates.