Mitsui Petrochemical Industries, Ltd.

Mitsui Chemicals, Inc.

Mutsuhiro Tanaka

Masahiro Sugi

Masatoshi Kashiwagi

Mamoru Kagami

Shiro Honma

Tomohiko Kimura

Shinichi Nagano

Shiro Homma

The sheathed wire or cable of the invention is obtained by coating an outermost layer of a wire or cable with a polyethylene resin produced by polymerization using a single-site catalyst. The polyethylene resin preferably has the properties: (i) the 50% crack occurrence time (F ), that becomes an indication of stress crack resistance, is not less than 600 hours, (ii) the abrasion wear as measured by a Taber abrasion test is not more than 10 mg, and (iii) the Izod impact strength (notched) as measured at &minus;40&deg; C. is not less than 40 J/m . In the polyethylene resin, high-pressure low-density polyethylene may be contained. The sheathed wire and cable exhibit excellent stress crack resistance, abrasion resistance and low-temperature impact resistance because their sheaths have stress crack resistance, abrasion resistance and low-temperature impact resistance better than those of conventional polyethylene sheaths.

Sheathed wires and cables

Polyamide resin composition

Strippable protective film and composition therefor

Polypropylene resin composition

Disclosed is an aqueous dispersion comprising (i) a hydrophobic thermoplastic polymer, (ii) a water-insoluble thermoplastic polymer containing a carboxylic acid salt group bonded to the polymer chain at a concentration of 0.1 to 5 milliequivalents as --COO-- per gram of the polymer, (iii) water and, if necesssary, (iv) at least one member selected from the group consisting of anionic surface active agents, nonionic surface active agents, organic solvents and oils, said aqueous dispersion being apparently solid and having a water content of 0.5 to 3% by weight and an electric resistance lower than 10.sup.6 .OMEGA.-cm and also having such a property that when water is added to the dispersion, solids are uniformly dispersed as fine particles in the aqueous phase.

Aqueous dispersion and process for preparation thereof

When a hydrophobic thermoplastic resin such as an olefin resin and a water-insoluble or non-water-swelling polymer containing a carboxylic acid salt group are melt-kneaded in the presence of water, phase inversion of forming a dispersion comprising water as the dispersion medium phase and resin particles as the dispersed phase is caused even if the amount of water is very small. If an anionic surfactant, optionally together with a solvent or oil, is made present in the composition to be melt-kneaded, the size of dispersed particles can be greatly reduced in the formed aqueous dispersion even if a resin having a very high molecular weight or a high melt viscosity is used.

A silicone-coated article having releasability imparted thereto by the coating of a silicone, wherein that surface of said article on which to coat the silicone is composed of a resin consisting of a polar group-containing olefinic resin comprising (a) 55 to 99% by weight of a unit derived from an olefin and (b) 1 to 45% by weight of a unit derived from a radical-polymerizable monomer containing a polar group selected from the class consisting of ##STR1## in which R.sub.1 represents a hydrogen atom, a metal capable of forming a salt with the carboxyl group, or a monovalent hydrocarbon group, and R.sub.2 represents a monovalent hydrocarbon group; and a method for the production thereof.

Silicone-coated article and process for production thereof

Growing community of inventors

Ichihara, Japan

Mutsuhiro Tanaka