Abstract: Novel compositions containing an ECTFE polymer and PTFE particles dispersed therein, and insulated wires and cables, especially local area network (LAN) cables in which the conductors are covered by foamed insulation made from such compositions.

Abstract: An ethylene/.alpha.-olefin copolymer composition containing a first and second ethylene/.alpha.-olefin copolymer is disclosed. The first ethylene/.alpha.-olefin copolymer is prepared in the prsence of a polymerization catalyst containing an organoaluminum oxy compound and at least two kinds of metallocene compounds (b) and the second ethylene/.alpha.-olefin copolymer, which differs from the first in at least one physical property, is prepared in the presence of a polymerization catalyst containing an organoaluminum oxy compound and a metallocene compound (b'). The ethylene/.alpha.-olefin copolymer composition has excellent moldability and heat stability properties and forms films having high transparency and mechanical strength.

Abstract: A polypropylene composition containing:(A) 10-95 parts by weight of a crystalline polypropylene,(B) 5-90 parts by weight of an ethylene-propylene copolymer rubber,(C) 1-30 parts by weight, per 100 parts by weight of the mixture of said crystalline polypropylene and ethylene-propylene copolymer rubber, of a hydroxyl group-containing propylene oligomer, andoptionally an inorganic filler in an amount of up to 40 parts by weight per 100 parts by weight of the mixture of said crystalline polypropylene and ethylene-propylene copolymer rubber and a suitable amount of an additive or auxiliary, has an improved compatibility with paint-coatings, and the shaped article formed from said composition can easily be paint-coated by simply treating it with water or an organic solvent instead of laying a primer layer onto the article before applying a paint thereon.

Abstract: A continuous process for producing a propylene-ethylene block copolymer having well-balanced properties of impact strength, stiffness, processability, etc. using a highly active catalyst, with a superior productivity is provided,which process comprisesa first polymerization step (I), carried out using a catalyst system consisting of [A] a solid catalyst component containing Ti, Mg, halogen and a polyvalent carboxylic acid ester as indispensable components, [B] an organoaluminum compound catalyst component and [C] an electron-donating compound,using two or more continuous polymerization vessels, andfeeding monomer(s) of ethylene/(ethylene+propylene) of 0 to 5% by weight, to carry out polymerization composed mainly of propylene, so as to give 60 to 95% of the total polymerized quantity;a continuous addition of a glycol compound (D) expressed by the formulaR.sup.1 --(OC.sub.m H.sub.2m).sub.n --OR.sup.2wherein m is an integer of 2 or more, n is an integer of 3 or more, R.sup.1 and R.sup.

Abstract: Permanently soil resistant polymeric compositions that have fluorochemical dispersed throughout the polymer are prepared by melt extrusion of the fluorochemical with the desired polymer. Preferred polymers for extrusion with the fluorochemical are polyester, polypropylene, polyethylene, and polyamide.

Abstract: Seals capable of containing corrosive liquid and/or vapor of, e.g., HCFCs, are made of cured blends of (a) CTFE/VF.sub.2 elastomer, (b) chlorine-free fluoroelastomer, and (c) 1 to 20 wt % of hydrocarbon polymer, based on the combined weight of (a) and (b). The blends are homogeneous and coherent wherein the hydrocarbon polymer is not visible at 165.times. magnification as a separate phase within the matrix of the blend of (a) and (b) and the blend is free of internal cracks and voids.

Abstract: An adhesive composition, useful for making a repositionable sheet, which is made up of a mixture of: (a) a polymer prepared by aqueous suspension polymerization of at least one monomer selected from an acrylate, a methacrylate and acrylic acid, the polymer having a geometric mean particle size ranging from about 30 to about 100 microns; and (b) a polymer prepared by aqueous suspension polymerization of at least one monomer selected from an acrylate, a methacrylate and acrylic acid, the polymer having a geometric mean particle size ranging from about 4.1 microns up to about 30 microns.

Abstract: A graft polymer wherein an iodine-containing fluororubber has been grafted on an ethylene-.alpha.-olefin copolymer or other polymer can be obtained by mixing 30 parts by weight of an iodine-containing fluororubber (a vinylidene fluoride-hexafluoropropylene copolymer containing iodine) and 70 parts by weight of an ethylene-propylene copolymer rubber at 180.degree. C. for 30 minutes while applying shear deformation using a Brabender mixer.

Abstract: Disclosed is a polymer composition of (A) a polyolefin composition consisting essentially of (i) a linear low density polyethylene and (ii) a copolymer of propylene with ethylene and/or a C.sub.4 -C.sub.8 .alpha.-olefin, where R is an alkyl radical having 2 to 10 carbon atoms and (B) a low density polyethylene.

Abstract: Disclosed are films or sheets comprising a blend of 1) a heterophasic olefin polymer composition and 2) a copolymer of ethylene with a CH.sub.2 .dbd.CHR alpha-olefin, where R is a C.sub.1-8 straight or branched alkyl.Coextruded films or sheets and laminates wherein at least one layer is a film or sheet as described above, and films or sheets of blends of the olefin polymer composition and another olefin polymer are also disclosed.

Abstract: A blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution and to yield a product that can be recovered as a solid using conventional plastic processing equipment. The sheared blend of polymers can function as a shear stable viscosity index improver with improved lower temperature properties.

Abstract: A blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution and to yield a product that can be recovered as a solid using conventional plastic processing equipment. The sheared blend of polymers can function as a shear stable viscosity index improver with improved lower temperature properties.

Abstract: Compatible polymer blends PM, exhibiting a single glass transition temperature Tg comprise(A) 0.1-99.9 wt. % of a polymer P1 comprising at least 95 wt. % styrene; and(B) 99.9-0.1 wt % of a polymer P2 comprising(a) more than 90 wt. % and up to 100 wt. % of ethyl methacrylate, and(b) 0 wt. % up to less than 10 wt. % of at least one monomer copolymerizable with ethyl methacrylate, provided that (a) plus (b) add up to 100 wt. %.The compatible polymer blends may be formulated with another polymer P3, chemically differentiable from P1 and P2, with P3 being incompatible with P1, P2 and PM, to form compositions of better impact resistance than PM. The compatible polymer blends find use in the production of weather-resistant items; data-storage discs, especially for optically readable information; and optical gradient fibers.

Abstract: A composite vinylidene chloride copolymer composition excellent in processability which comprises a vinylidene chloride copolymer A having a molecular weight of not less than 50,000 and not more than 300,000 and a vinylidene chloride copolymer B having a molecular weight of not less than 5,000 and not more than the smaller one of either 0.8 times the weight average molecular weight of the vinylidene chloride copolymer A or 80,000, and a monolayer film which comprises the composite vinylidene chloride copolymer composition and is excellent in various properties including barrier property, non-extractability by oily foods and high frequency sealability, and is suitable as a barrier packaging material and wrapping film used for ham, sausage and other like foods.

Abstract: A rubber composition satisfying wear resistance and fracture properties as well as wet skid resistance, ice skid resistance and dry gripping property is provided by including at least 30% by weight of a rubber ingredient which consists of 100 parts by weight of a particular branched styrene-butadiene copolymer (A) and 15-100 parts by weight of a particular low molecular weight butadiene polymer (B) and has a Mooney viscosity of 30-100.

Abstract: A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.

Abstract: Polymer compositions based on fluoropolymers intended especially for the manufacture of electrical cables and of flexible pipes, comprising, by weight,(A) from 25 to 75% of PVDF homopolymer;(B) from 25 to 75% of a thermoplastic copolymer of VF.sub.2 and of at least one other fluoromonomer, exhibiting a content of 5 to 25% of this other monomer. This other fluorocomonomer may be in particular CTFE (chlorotrifluoroethylene), HFP (hexafluoropropylene) or TrFE (trifluoroethylene). Articles produced from these compositions have good mechanical properties at low temperature.

Abstract: Polymer mixtures made from two different polymer components and exhibiting LCST behavior are provided for use in applications which require temperature-dependent light permeability. The polymer mixtures P are made from:P1: from 98 to 2% by weight of poly-.alpha.-methylstyrene (PAMs); andP2: from 2 to 98% by weight of polyvinyl methyl ether (PVMe).

Abstract: The present invention provides a crosslinkable composition which comprises an internally crosslinked acrylic elastomer which is crosslinkable with a peroxide, a fluoroelastomer and a crosslinking agent for at least one of the elastomers.A crosslinkable composition of the present invention can afford a molding which are excellent in physical properties such as mechanical strength and compression set, heat resistance and workability.

Abstract: A polymeric composition including a first copolymer of ethylene and a higher .alpha.-olefin having 3 to 12 carbon atoms, said first copolymer having a density of between 0.880 g/cc. and about 0.949 g/cc. and a melt index of between about 0.01 and about 100, present in the polymeric composition in a concentration of between about 60% and about 95% by weight; and a second copolymer of ethylene-vinyl acetate having a vinyl acetate content of at least about 28% by weight, based on the total weight of the ethylene-vinyl acetate copolymer, said second copolymer present in a concentration of between about 5% and about 40% by weight, said percentages by weight based on the total weight of the polymeric composition. This polymeric composition is particularly useful when fabricated into a film, which has excellent impact strength.