Abstract: A silane-crosslinkable copolymer composition comprising: (A) 100 parts by weight of a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and at least one ethylenically unsaturated silane compound selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane and .gamma.-methacryloxypropyltrimethoxysilane under a pressure ranging from 1,000 to 4,000 kg/cm.sup.2, and containing said silane compound in an amount of from 0.5 to 2 wt %; (B) from 0.001 to 10 parts by weight of a silanol condensation catalyst; and (C) from 0.01 to 5 parts by weight of a silane compound having a hydrolyzable organic group.

Abstract: A self-extinguishing polymer composition consisting of 20 to 70% by weight of thermoplastic resin or elastomer (A), 80 to 30% by weight of a hydroxide of aluminum and/or magnesium (B), and a polymeric charge-transfer type complex (C) in an amount of 0.01 to 10 parts by weight relative to 100 parts by weight of (A) and (B).

Abstract: A copolymer of ethylene and an ethylenically .alpha.,.beta.-unsaturated acid halogenated phenyl ester represented by the formula (1): ##STR1## (wherein R is hydrogen or a methyl group, X is a halogen atom, Y is an alkyl group having 4 to 18 carbon atoms, n is 0 or 1, m is an integer of 1 to 5, and l is 0 or an integer of 1 to 4), wherein the halogenated phenyl ester group unit content is about 0.005 to about 10 mol %. This copolymer is excellent in dielectric breakdown characteristics and flexibility, and its excellent performance can be maintained over a long period of time. Thus, it is useful as a superhigh voltage electric wire cable insulative material.

Abstract: The present invention provides self-extinguishing polymer compositions containing components A, B, and C described below, characterized in that the proportions of components A and B are 90 to 99.99 wt % and 10 to 0.01 wt %, respectively, relative to the total amount of components A and B, and the proportion of component C is 35 to 80 wt % relative to the total amount of components A, B, and C.Component A: thermoplastic resins or elastomers other than component B described below or mixtures thereofComponent B: copolymers comprising ethylene and 0.5 to 50% by weight of ethylenic unsaturated epoxy compoundsComponent C: magnesium hydroxide granules having an average size of 0.2 to 2 microns.

Abstract: As a fuel oil additive, an ethylenic copolymer is provided which is derived from:(a) ethylene, and(b) at least one monomer selected from the group consisting of vinyl esters of saturated carboxylic acids, ethylenically unsaturated mono- or di-carboxylic acids and esters thereof which are represented by the general formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group, R.sup.2 represents the group --OCOR.sup.4 or --COOR.sup.4 in which R.sup.4 represents hydrogen or an alkyl group having 1 to 18 carbon atoms, and R.sup.3 represents hydrogen or the group --COOR.sup.4 in which R.sup.4 has the same significance as above, having a number average molecular weight of less than 1,000 and a (b) component content of 1 to 25 mol %, and containing 2 to 10 alkyl branches per 100 methylene groups. Addition of the copolymer to a fuel oil provides a modified fuel oil having improved plugging resistance and having improved flowability.

Abstract: An ethylene copolymer comprising an ethylene unit and an ester unit selected from ethylenically .alpha.,.beta.-unsaturated acid esters represented by the formula (I) or (II): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group; and R.sup.2 represents a halogenated alkyl group having from 1 to 15 carbon atoms; ##STR2## wherein R.sup.3 represents a hydrogen atom or a methyl group; and n represents 0 or 1,wherein said ester unit is present in a total amount of from 0.001 to 10 mol %. The copolymer has excellent dielectric breakdown characteristics, such as electricity treeing property, water treeing property, etc., and is useful as an insulating material for high-voltage cables.

Abstract: A silane-crosslinkable copolymer composition comprising:(A) 100 parts by weight of a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and an ethylenically unsaturated silane compound having a hydrolyzable organic group under a high pressure, and containing said silane compound in an amount of from 0.1 to 5 wt %;(B) from 0.001 to 10 parts by weight of a silanol condensation catalyst; and(C) from 0.01 to 5 parts by weight of a silane compound having a hydrolyzable organic group.