A polymeric matrix including: 50 to 80%, preferably 64 to 73% PET; 18 to 50%, preferably 20 to 28% of a mixture of polyolefins; 0.1 to 15%, preferably 0.5 to 7% of at least one flame-retardant additive; 0 to 2%, preferably 0.2 to 1% of at least one antioxidant; 0 to 2% preferably 0.2 to 1% of at least one crosslinking promoter; 0 to 2%, preferably 0.2 to 1% of at least one anti-hydrolysis agent, the percentages being by weight of the total weight of the matrix. Also, the use of polymeric matrix in manufacturing electrical cables.

A resin composition including an ethylene-vinyl acetate copolymer resin as a resin component, an imidazole compound, a phenol compound, and a thioether compound as an antioxidant, and a bromine compound and an antimony compound as a flame retardant. The resin composition has a content of the imidazole compound of 14 to 24 parts by mass, a content of the phenol compound of 1.0 to 2.0 parts by mass, a content of the thioether compound of 0.3 to 0.9 parts by mass, a content of the bromine compound of 15 to 30 parts by mass, and a content of the antimony compound of 5 to 15 parts by mass with respect to 100 parts by mass of a total content of the resin component in the resin composition.

A dispersion liquid is provided, which contains antimony-containing tin oxide particles, an acidic compound, a basic compound, and a dispersion medium, wherein the basic compound has a molecular weight of 180 to 500 and is at least one compound selected from the group consisting of secondary amines and tertiary amines represented by the following formula (1), the dispersion liquid has a pH higher than an isoelectric point of the antimony-containing tin oxide particles, and the pH of the dispersion liquid assumes a value closer to the isoelectric point during a process of evaporating the dispersion medium from the dispersion liquid:

##STR00001##

(In formula (1), R.sup.1 and R.sup.2 each independently represent an aliphatic hydrocarbon group, and R.sup.3 represents a hydrogen atom or an aliphatic hydrocarbon group.)