Abstract: The present invention provides an ethylene copolymer resin that has unique melt elastic properties not observed in ethylene copolymers heretofore known. Specifically, the ethylene copolymer resin of the present invention when in pelletized form has a reduction in melt elasticity (ER) of 10% or more to a final value of 1.0 or less upon rheometric low shear modification or solution dissolution. Moreover, the resin of the present invention when in reactor-made form exhibits at least a partially reversible increase of 10% or more in ER when pelletizing the same. An ethylene polymerization catalyst, a process of preparing the ethylene copolymer resin and a high-impact film are also provided herein.

Abstract: Multilayer interference pigment consisting of a central layer of a transparent or semitransparent material of low refractive index and alternating layers of a metal or of a material of high refractive index and of a material of low refractive index either side of the central layer, the material of low refractive index preferably being magnesium fluoride or acrylate and the metal preferably being aluminium or chromium.

Abstract: The present invention provides a solid catalyst component for polymerization of olefins obtained by allowing a solid component and an alcohol to come in contact with each other, wherein the solid component is prepared by allowing a magnesium compound, a titanium compound and an electron donor compound to come in contact with each other, and also provides a catalyst for polymerization of olefins made of the solid catalyst component, an organic aluminum compound represented by the general formula R.sup.1.sub.p AlQ.sub.3-p and an organic silicon compound represented by the general formula R.sup.2.sub.q Si(OR.sup.3).sub.4-q. By using the catalysts in a polymerization of olefins, polyolefins excellent in stereoregularity can be obtained in high yield.

Abstract: A method of preparing a polymer structured pigment slurry which comprises providing an anionic, aqueous slurry including a plurality of solid mineral particles, adding a low molecular weight, cationic polymer in an amount of less than about 0.20% by weight to the slurry and then adding a small amount of an inorganic dispersant to the polymer treated pigment slurry. The Malvern median particle size of the mineral particles treated with the polycationic polymer is less than about 20% larger than the Malvern median particle size of the untreated mineral particles.

Abstract: Novel catalyst systems which comprise pyridine-2-carboxaldimine nickel complexes can be used with methylaluminoxane in slurry polymerization processes to polymerize mono-1-olefins and, optionally a higher alpha-olefin comonomer, to produce low molecular weight polymers.

Abstract: The invention relates to a novel crystal modification (.delta.-modification) of C.I. Pigment Red 53:2 of the formula (1) ##STR1## having the following characteristic reflections in the X-ray powder diffraction pattern:______________________________________ 2.THETA. d relative intensity (in %) ______________________________________ 3.3 26.6 32 4.7 18.7 100 7.5 11.9 14 9.4 9.3 19 10.5 8.4 13 13.8 6.4 10 14.2 6.2 9 14.9 5.9 10 16.7 5.3 11 17.6 5.0 9 18.1 4.9 16 18.9 4.7 10 20.4 4.3 7 21.1 4.2 9 22.1 4.0 9 22.7 3.9 12 23.1 3.8 9 23.6 3.8 13 24.1 3.7 9 24.9 3.6 10 25.5 3.5 23 26.3 3.4 9 27.7 3.2 9 28.1 3.2 6 28.9 3.1 6 30.4 2.

Abstract: The present invention provides a catalyst for the polymerization of olefin that exhibits improved selectivity and broader molecular weight distribution in the polymer product. The catalyst is a conventional supported Ziegler-Natta catalyst in combination with a mixture of at least two electron donors, both having the general formula SiR.sub.m (OR').sub.4-m where R is selected from the group consisting of an alkyl group, a cycloalkyl group, an aryl group and a vinyl group; R' is an alkyl group; and m is 0-3, wherein when R is an alkyl group, R may be identical with R'; when m is 0, 1 or 2, the R' groups may be identical or different; and when m is 1, 2 or 3, the R groups may be identical or different. This catalyst produces polypropylene having xylene solubles of 1-7 to 5.1 wt % and a molecular weight distribution of about 10.

Abstract: A fine yellow composite iron oxide hydroxide pigment of the present invention has an average major axial diameter of not less than 0.005 .mu.m and less than 0.1 .mu.m, which comprises:fine goethite particles as core particles, containing aluminum inside thereof in an amount of 0.05 to 50% by weight, calculated as Al, based on the weight of said core particles; anda composite oxide hydroxide of Fe and Al, coated on the surface of each core particle. Such fine yellow composite iron oxide hydroxide pigment are excellent in transparency and heat resistance.

Abstract: The present invention provides a novel process for preparing a catalyst, preferably free of electron donor, useful in gas phase polymerization of olefins having a broad polydispersity.

Abstract: A catalyst composition for the polymerization of olefins is provided, which comprises a) a catalyst comprising a metal atom complexed with a non-cycloalkadienyl anionic ligand, wherein the chemical hardness, .eta., and chemical potential, .mu., of said non-cycloalkadienyl anionic ligand calculated using the MOPAC (PM3) computer program satisfy the relationship: .eta.=3.0+0.75.mu..+-.0.2 eV; and b) an activating cocatalyst.

Abstract: Disclosed herein is a method for preparation of composite pigments for make-up cosmetics having improved skin-adhesion and spreadability, and excellent skin color-expression, and improved water resistance by silicon polymer coated on the surface of the complex particle of flaky silica and titanium dioxide coated thereon.

Abstract: A web of material has a plurality of stems extending from at least one side of the web. The web includes a first layer of material having a first side and a second side and a second layer of material. The second layer of material has a first side which faces the first side of the first layer and a second side from which the plurality of stems extend. The first and second layers of material are joined together while they are both molten, before either layer has cooled. The first and second layers of material can be formed of thermoplastic material or melt processable polymeric material. A method of making a web of material includes selecting a first material for a first layer of material and selecting a second material for a second layer of material. The first and second layers of material are melt formed. Then, the first and second layers of material are joined while the layers are in the molten state to form a multiple layer sheet.

Abstract: Methods for preparing olefin polymers, and catalysts for preparing olefin polymers are disclosed. The polymers can be prepared by contacting the corresponding monomers with a Group 8-10 transition metal catalyst. The polymers are suitable for processing in conventional extrusion processes, and can be formed into high barrier sheets or films, or low molecular weight resins for use in synthetic waxes in wax coatings or as emulsions.

Abstract: A titanyl sulfate solution or a titanium tetrachloride solution is neutralized with an alkali to form orthotitanic acid, to which hydrochloric acid is added such as to adjust the TiO.sub.2 concentration to 80-140 g/L and the HCl concentration to 90-150 g/L and a synthesis reaction is performed at a temperature of 25-60.degree. C. to produce titanium oxide particles in which needles aggregate and/or bind together to yield fan-shaped particles.

Abstract: The invention relates to olefin polymerization using an organosilicon compound from the pyrazolyl family as an external adjuvant.

Abstract: The invention relates, in particular, to pigments in the form of fine particles having enhanced stability with respect to ultraviolet solar radiation and particle radiation (electrons, protons), characterized in that the pigment are coated with a UV filter.Application in the production of paints for spacecrafts.

Abstract: Describes a free flowing particulate composition comprising, in combination, particulate amorphous precipitated silica, e.g., in the form of granules, hydrocarbon process oil, e.g., an aromatic process oil, and organic carboxylic acid having from 2 to 30 carbon atoms, e.g., stearic acid. The hydrocarbon process oil and organic carboxylic acid are sorbed on the silica and are present in amounts sufficient to measurably improve the dispersibility of the particulate amorphous precipitated silica into an elastomer as measured by percent white area. Optionally, an organosilane coupling agent may also be present in said composition. The free flowing particulate composition of the present invention is useful in reinforcing elastomers, e.g., rubbers used in vehicle tires and the soles of athletic foot wear.

Abstract: A silica-metal oxide particulate composite comprising silica agglomerates having voids formed by random stacking of scaly silica primary particles, and metal oxide particulates supported on the surfaces, and the inner surfaces in the voids, of the silica agglomerates.