Abstract: An alternating copolymer of an olefinic unsaturated compound and a conjugated vinyl compound is produced by contacting said monomers with at least one organoboron halide or/and a mixture of at least one organo-compound of metal from Groups IIb, IIIb and IVb of the Mendeleev Periodic Table and at least one halogeno-compound of metal from Groups IIIb and IVb of the Mendeleev Periodic Table. A typical catalyst is ethylboron dichloride or a combination of triethylaluminum and tin tetrachloride.

Abstract: Polyurethane emulsions are prepared by reacting a semi-ester containing at least one hydroxyl group and at least one carboxyl group which is produced from a polyhydroxyl compound and an acid anhydride with a polyisocyanate compound having at least two NCO groups which forms said polyurethane emulsion.

Abstract: A method for bonding solid materials by use of a copolymer comprising at least one olefin having 3 to 20 carbon atoms and at least one acrylic ester compound containing an alcohol residue having 1 to 20 carbon atoms and at least one functional ethylenically unsaturated compound from among acryloyl halides or maleic anhydride.

Abstract: Novel alternating copolymers having functional groups are prepared by subjecting to alternating copolymerization at least one olefin, at least one acrylic ester and at least one .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative represented by the formula: ##EQU1## wherein Y and Z are independently --O--, --S--, or --NR.sup.3 --, and R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen or hydrocarbon groups having 1 to 20 carbon atoms. Said alternating copolymer consists essentially of a structure in which said olefin is bonded to only said acrylic ester or said .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative, and said acrylic ester and said .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative are bonded to only said olefin, and has a sufficiently high molecular weight.

Abstract: Elastomeric compositions comprising 1 part by weight of at least one curable elastomer and 0.01 to 100 parts by weight of at least one copolymer having olefin and acrylic ester monomer units as the main constituents, which possess improved properties in tackiness, processability, oil resistance, thermal resistance, weathering resistance and the like.