Abstract: An improved process for cross-linking a shaped polyethylene is herein disclosed comprising irradiating it with electron beams using 0.2 to 2 parts by weight of amine alone or in combination with 0.2 to 1.0 part by weight of alcohol for 100 parts by weight of polyethylene to thereby improve the electrical, mechanical, thermal and other characteristics of the polyethylene.

Abstract: A method of manufacturing an electric wire or cable having an improved rubber or plastic insulation layer which has the maximum wall thickness of beam penetration of 4mm or over and whose properties are improved by irradiation with an electron beam, wherein the wire or cable runs under the scanner of an electron beam accelerator while being rotated about the axis of the wire or cable at such a speed as causes the same portion of the wire or cable to be irradiated with the electron beam at least twice during a period of less than 10 seconds; and the electron beam accelerator directs on the insulation layer of the wire or cable an electron beam which is accelerated to an energy of 1 MeV or over and whose maximum penetration range in the said insulation layer is larger than its thickness.

Abstract: A process for curing a radiation curable composition consisting essentially of (a) an amide represented by the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined hereinbelow, and (b) an unsaturated polyester resin by irradiating the composition with an ionizing radiation.

Abstract: A process for producing a reactive aqueous emulsion comprising dispersing a monomer mixture of (a) 65.0 - 98.8% by weight of radical polymerizable hydrophobic ethylenic unsaturated monomer having one ethylenic unsaturated bond, (b) 1.0 - 30.0% by weight of radical polymerizable ethylenic unsaturated monomer having a glycidyl group and (c) 0.2 - 5.0% by weight of a radical polymerizable ethylenic unsaturated monomer having a carboxylic group in water by virtue of a restricted amount of surface active agent and irradiating with an ionizing radiation for a total dose of more than 0.01 Mrad at temperatures ranging from -5.degree. C. to 50.degree. C. This reactive aqueous emulsion does not contain low-molecular water-soluble compounds such as a radical polymerization initiator, a pH regulator, etc. and can form a film having improved properties.

Abstract: A process is, herein, disclosed for preparing a thermosetting aqueous polymer emulsion comprising;(1) dispersing a monomer mixture of 90.0 - 99.9 wt % of a radical polymerizable hydrophobic ethylenic unsaturated monomer having an ethylenic unsaturated bond in its molecule and 0.1 - 10.0 wt % of a radical polymerizable crosslinkable monomer having more than two ethylenic unsaturated bonds in its molecule in water in which a specific amount of surface active agent is dissolved to form a dispersion.(2) irradiating the dispersion with an ionizing radiation to effect the first stage emulsion polymerization.(3) adding a monomer mixture of 52.0 - 97.0 wt % of the radical polymerizable hydrophobic ethylenic unsaturated monomer, 2.5 - 40.0 wt % of a radical polymerizable ethylenic unsaturated monomer having a hydroxyl group and 0.5 - 8.

Abstract: The properties of a thermosetting polymer emulsion can be improved by irradiation with an ionizing radiation.By adding a specific amount of lipophilic polyfunctional monomer to a thermosetting polymer emulsion and irradiating with an ionizing radiation, the properties of the thermosetting polymer emulsion can be improved regardless of the type of thermosettable polymer constituting the emulsion. The thermosetting polymer emulsion of which properties are improved by this invention can form a film having excellent water-resistance, chemical resistance and toughness.

Abstract: A method of manufacturing shaped articles of cross-linked poly-.alpha.-olefin composition by irradiation of electron beam which comprises the steps of blending a poly-.alpha.-olefin with a compound miscible therewith which is expressed by the general formula:X--Ym(where X is a group free from acetylenic linkage, Y is a group containing acetylenic linkage and m is an integer of 1 or over) and tetrakis-[methylene-(3,5-di-t-butyl-4-hydroxy-hydrocinnamate)]-methane; molding the blended mass into a desired shape; and cross-linking said shaped articles by irradiation of electron beam.

Abstract: A process for producing an aqueous emulsion type coating composition, which can form a film having excellent resistance to chemicals and water, which comprises irradiating the aqueous emulsion containing at least one radiation-crosslinkable resin and not containing substantial amounts of a stabilizer having a hydroxy group, such as cellulose and polyvinyl alcohol, by means of ionizing radiation.

Abstract: A method for cross-linking polyethylene, characterized in that polyethylene is blended with dipropargyl maleate and a copolymer selected from the group consisting of an ethylene-acrylonitrile copolymer, an ethylene-acrylic ester copolymer, an ethylene-substituted acrylic ester copolymer, ethylene-vinyl acetate copolymer, an ethylene-substituted vinyl acetate copolymer and mixtures thereof, and the resulting mixture being irradiated with an ionizing radiation.

Abstract: A process for producing molded product composed of crosslinked resin or coated material composed of crosslinked resin on a substrate which comprises blending a polyolefin-series resin, a compound represented by the formulaX -- Y.sub.m Iwherein X is a group not containing an acetylenic linkage, Y is a group containing an acetylenic linkage and m is an integer of 1 or more, which is compatible with the resin at a room temperature or an elevated temperature, and a compound selected from the group consisting of an amino compound represented by the formula ##STR1## wherein each of R.sub.1 and R.sub.2 is independently substituted or non-substituted aliphatic hydrocarbon, substituted or non-substituted alicyclic hydrocarbon, or substituted or non-substituted aromatic hydrocarbon, provided that at least one of R.sub.1 or R.sub.2 is substituted or non-substituted aromatic hydrocarbon, an amino compound represented by the formula ##STR2## wherein each of R.sub.3, R.sub.4 and R.sub.

Abstract: A fiber reinforced plastic (FRP) flat plate having no warps is continuously prepared by curing a continuous FRP plate molding material both top and back surfaces of which are covered with film-like sheetings by means of an ionizing radiation. In the process, the FRP molding material is continuously transported in lengthwise direction, and tensions are given to said film-like sheetings in both lengthwise and widthwise directions before and in the course of the irradiation.

Abstract: Electric wire coated by a non-flammable resin, characterized in that the resin is composed of two layers, the degrees of crosslinking of which are different from each other, and the gel percent of the outer portion of the resin is lower than that of the inner portion of the resin is disclosed.

Abstract: Radiation-curing reaction of a radiation-curable resin such as an unsaturated polyester resin is promoted by using a combination of an ionizing radiation and a substantial amount of an adding material.

Abstract: A cured polyester resin product is obtained by curing a substrate which was treated with a liquid unsaturated polyester resin composition containing an ethylenically unsaturated monomer having at least one epoxy group and was covered with a saturated polyester resin film, the surface of the polyester film having been activated. The cured product has improved resistance to chemicals and weathering and the like.