Abstract: Polymer melt blends of a homopolymer of propylene or a copolymer of propylene with up to 40 weight percent of another monoolefin, with a homopolymer of one or more of a C.sub.10 to C.sub.30 alkyl (meth)acrylate or a copolymer containing at least 70 weight percent of the one or more C.sub.10 to C.sub.30 ester of an alkyl (meth)acrylate with up to 30 weight percent of one or more of a C.sub.1 to C.sub.9 alkyl (meth)acrylate, the homopolymer or copolymer having a weight-average molecular weight of at least 670,000, exhibit a relative characteristic time, as herein described, at least five (5) times that for the unmodified homo- or copolymer of polypropylene, and a melt strength ratio (as judged by relative sag resistance) at least 5 times that of the unmodified homo- or copolymer of polypropylene. Such blends are useful in thermoforming operations wherein sheet is thermoformed into cartons, containers, appliance housings, and the like.

Abstract: A thermoplastic elastomer composition which comprises (I) 99 to 1% by weight of a hydrogenated diene copolymer having a number average molecular weight of 50000 to 700,000 in which 80% or more of the double bonds of the conjugated diene portion of the conjugated diene polymer have been saturated, (II) 1 to 99% by weight of an ionomer resin having an .alpha.-olefin unit having 2 to 8 carbon atoms and an .alpha.,.beta.-unsaturated carboxylic acid unit, at least part of the carboxyl group of said unsaturated carboxylic acid unit having been neutralized with a metal ion, and (III) 0 to 70% by weight of a polyolefin resin, provided that (I)+(II)+(III)=100% by weight. Said composition is excellent in moldability and gives a molded article excellent in transparency, flexibility, mechanical strength, heat resistance and impact resilience.

Abstract: A film comprising a blend of copolymers, which has been extruded (i) to a film having a gauge of less than about 1.8 mils; a dart impact strength of at least about 80 grams per mil at a density of 0.926 gram per cubic centimeter; and a dart impact strength of at least about 480 grams per mil at a density of 0.918 gram per cubic centimeter and/or (ii) to a film having a gauge of less than about 5 mils, and a blocking force of less than about 120 grams and a COF in the range of about 0.2 to about 0.5, said blend having been produced in situ by contacting ethylene and at least one alpha-olefin comonomer with a magnesium/titanium based catalyst system in each of two reactors connected in series, under polymerization conditions, wherein the polymer formed in the high molecular weight reactor has a flow index in the range of about 0.01 to about 30 grams per 10 minutes and a density in the range of about 0.860 to about 0.

Abstract: A resin composition for an electrophotographic toner is here disclosed which comprises an ethylene series high polymer (Y) and an ethylene series polymer (X) prepared from 100 parts of a bifunctional ethylene series unsaturated monomer and 0.01-10 parts by weight of a substance having three or more peroxide groups in the molecule and/or a substance having one or more unsaturated functional groups and one or more peroxide groups in the molecule, Mw/Mb (Mw is weight-average molecular weight, and Mb is weight-average molecular weight between crosslinking points) of said polymer (X) being from 2 to 99, Mw of said polymer (X) being 50,000 or less. This resin composition is excellent in the balance of various physical properties required for the toner, and particularly, it is excellent in offset resistance and toner strength.

Abstract: This invention relates to a ternary blend of 25 to 45 wt. % random polypropylene copolymer, 20 to 40 wt. % ethylene propylene rubber and 30 to 45 wt. % high density polyethylene having excellent low temperature impact resistance and useful for producing molded articles.

Abstract: A curable ethylene copolymer blend composition is provided which is a blend of an ethylene dipolymer, an ionomer of an ethylene unsaturated acid copolymer, and a peroxide curing agent. The composition is particularly adapted for production of non-porous products under pressureless curing conditions.

Abstract: There is provided a cycloolefin polymer composition comprising 8 to 40% by weight of a cycloolefin polymer [A] and 92 to 60% by weight of a cycloolefin polymer [B], both having specific properties, wherein a difference .DELTA.n.sub.D =.vertline.n.sub.D (A)-n.sub.D (B).vertline. between the refractive index n.sub.D (A) of the polymer [A] and the refractive index n.sub.D (B) of the polymer [B] is not more than 0.015. This composition is excellent in impact resistance, transparency and heat resistance, and has a good balance of these properties.There is also provided a cycloolefin copolymer composition comprising 8 to 40% by weight of a cycloolefin elastomer component [Aa] of an .alpha.-olefin, a specific cycloolefin and a non-conjugated diene which contains a polymerizable carbon-carbon double bond; and 92 to 60% by weight of a cycloolefin copolymer component [Ba] which is obtained by copolymerizing an .alpha.

Abstract: A process for manufacturing bimodal olefin polymers and copolymers having a ratio between low molecular weight fractions within the range of 40:60-70:30, by mixing under shear conditions 5-50 percent by weight of a low molecular weight unimodal polyolefin having a molecular weight (Mw) between 15,000-30,000, and 95-50 percent by weight of a bimodal polyolefin having a ratio between low molecular weight fractions and high molecular weight fractions within the range of 30:70-55:45. According to a preferred embodiment, there is used a multi-phase process including a loop reactor followed by a gas-phase reactor, wherein a part of the product coming out from the loop reactor is separated and combined with the bimodal product coming out from the gas-phase reactor.

Abstract: A curable ethylene copolymer blend composition is provided which is a blend of an ethylene dipolymer, an ionomer of an ethylene unsaturated acid copolymer, and a peroxide curing agent. The composition is particularly adapted for production of non-porous products under pressureless curing conditions.

Abstract: The present invention relates to a tire innerliner and pneumatic tires containing the same, which are prepared from a composition comprising, based on 100 parts by weight of rubber, a blend containing 30 to about 50 parts by weight of a solution polymerized styrene-butadiene rubber having a Tg ranging from -45.degree. C. to -65.degree. C. and 70 to 50 parts by weight of a halobutyl rubber.

Abstract: A process is provided to improve the properties of polyethylene resins obtained from chromium catalyzed polymerizations and blow molded bottles produced therefrom. The process entails modifying the polyethylene resin by contacting the resin in a molten state with an organic peroxide at a temperature above the decomposition temperature of peroxide. Polyethylene resins utilized for the process have specific densities, melt indexes, long chain branching indexes, unsaturation contents and molecular weight distributions. Blow molded bottles produced from the modified resins have significantly increased top load stress crack resistance and improved swell characteristics.

Abstract: There is provided a heat-resistant, propylene resin-based molding material, comprising the following components (A) and (B):component (A): 3 to 97% by weight of a resin-impregnated glass fiber bundle comprising:constituent (a.sup.1): 20 to 80 parts by weight of glass fibers having a length of at least 3 mm and an average diameter of 20 .mu.m or less, andconstituent (a.sup.2): 80 to 20 parts by weight of a crystalline propylene polymer at least partly modified with an unsaturated carboxylic acid or a derivative thereof, the MFR of the modified polymer being 50 g/10 min or more, in which the glass fibers are present in the constituent (a.sup.2) in such a state that they are arranged almost in parallel with one another; andcomponent (B): 97 to 3% by weight of a crystalline propylene polymer having an MFR of 50 g/10 min or more.

Abstract: Blended polymer compositions are disclosed comprising an admixture of (a) a copolymer of ethylene and an alphaolefin and (b) an amorphous polypropylene, and/or amorphous polyolefin, or mixtures thereof.

Abstract: A polypropylene resin composition comprising: (a) 50 to 90% by weight of polypropylene, (b) 50 to 10% by weight of an ethylene-.alpha.-olefin copolymer elastomer having a Mooney viscosity (ML 1+4 (100.degree. C.)) of 10 to 100, (c) 0.5 to 10 parts by weight per 100 parts by weight of the total of the amounts of the components (a) and (b) of a linear olefinic polymer containing hydroxyl group which is liquid at room temperature, and (d) 0.5 to 15 parts by weight per 100 parts by weight of the total of the amounts of the components (a) and (b) of a linear olefinic polymer having a melting point of about 70.degree. to about 90.degree. C. and a number-average molecular weight of 1500 to 6000 and containing hydroxyl group or carbonyl group; and a protective strip for automobiles using the polypropylene resin composition are disclosed. Coating immediately after degreasing is made possible and excellent property for coating can be provided by using the polypropylene resin composition.

Abstract: Blended polymer compositions are disclosed comprising an admixture of (a) a copolymer of ethylene and an alphaolefin and (b) an amorphous polypropylene, and/or amorphous polyolefin, or mixtures thereof.

Abstract: A tetrafluoroethylene/fluoroalkoxy trifluoroethylene copolymer (PFA) composition which has finer spherulite diameters compared to a conventional PFA is provided, so as to give fabricated articles having excellent surface smoothness, and which are free from problems, such as process contamination and the like, caused by leaching. This effect is obtained by incorporating into the composition prior to fabrication a polytetrafluoroethylene having a crystallization temperature of at least 305.degree. C. and a heat of crystallization of at least 50 J/g.

Abstract: A polyolefin-based matte film or sheet can be prepared from a polymeric blend of the preset invention comprising a propylene polymer or copolymer as component (A), a specific ethylene-.alpha.-olefin copolymer (E.alpha.O, so-called "super low-density polyethylene") as component (B), and a high-pressure radical polymerization process ethylene polymer or copolymer and/or a modified polyolefin-based resin as component (C). The above blend of the present invention may further comprise an inorganic filler as component (D) and a flame retardant as component (E). The matte films or sheets prepared from these polymeric blends are excellent in tensile modulus, flexibility, impact resistance, thermal resistance, laminating properties, flame resistance, chalking resistance, covering power, scratch resistance, and widely used for fabricating adhesive tapes, covers or cases for stationery, fashion bags, sheets for interior finish work in construction and automobile industries, and sheets for dressing steel plates.

Abstract: Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an isobutylene/para-methylstyrene copolymer which contains functional groups pendant to the polymer chain. These functional groups contain an olefinic or vinyl double bond positioned alpha, beta to a substituent group which activates the double bond towards free radical addition reactions with the diolefin polymer. Preferred functionality includes benzylic ester functionality represented by the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1 to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.

Abstract: This invention provides a thermoplastic elastomer powder produced by a gas polymerization process by the use of a specified catalyst system which is excellent in powder fluidity, retains a high fluidity even in a state where no substantial forming pressure is applied and can be formed by powder molding process, as well as a powder molding process using said elastomer powder and a molded product of said molding process.

Abstract: A propylene block copolymer having a high rigidity and an excellent impact strength is produced by (1) first polymerizing propylene or a mixture of propylene and another ethylenically unsaturated hydrocarbon monomer in the presence of a catalyst comprising a Ti-containing solid component (A), an organic Al compound-containing component (B) and an alkoxyl silicon compound-containing component (C), and (2) second copolymerizing, in a gas phase, propylene and another ethylenically unsaturated hydrocarbon monomer in the presence of the first crystalline polymer of step (1) by re-using the catalyst of first polymerization, and in the presence of a saturated hydrocarbon with 6 or more carbon atoms, thereby forming an elastomeric fraction incorporated into the crystalline polymeric fraction.