초록 ▼

The invention relates to a hydroexpansible composite material, the method of preparing same and a composition for implementing this method, as well as to the uses thereof. The composite material includes a solid flat support having, on at least one of its faces, a coating with a high proportion of a

The invention relates to a hydroexpansible composite material, the method of preparing same and a composition for implementing this method, as well as to the uses thereof. The composite material includes a solid flat support having, on at least one of its faces, a coating with a high proportion of a hydroexpansible polymer powder fixed to the support by means of a hydrosoluble binder, the coating being essentially formed of: 95 to 55% by weight of hydroexpansible polymer powder; 5 to 23% by weight of hydrosoluble binder; and 0 to 22% by weight of surfactant. This hydroexpansible material may advantageously be used in medicine, surgery agriculture and especially as sealing agent in cables, particularly electric cables. FIG. 2 shows how, in a cable, this material (11, 13) forms a sealing ring (13) about the point of infiltration of the water, thus preventing its longitudinal propagation.

대표청구항 ▼

A composite material for use as sealing agent in cables, including essentially a flat solid support having on at least one of its faces a coating with a high proportion of a hydroexpansible polymer powder, wherein the hydroexpansible polymer powder is fixed to the support by means of a hydrosoluble

A composite material for use as sealing agent in cables, including essentially a flat solid support having on at least one of its faces a coating with a high proportion of a hydroexpansible polymer powder, wherein the hydroexpansible polymer powder is fixed to the support by means of a hydrosoluble binder and the coating is essentially formed of: 95 to 55% by weight of hydroexpansible polymer powder; 5 to 23% by weight of hydrosoluble binder; and surfactant in a positive amount of up to 22% by weight. A method for the manufacturer of a composite material for use as a sealing agent in cables comprising coating on at least one surface of an essentially flat solid support with a paste homogenized by a liquid other than water, and evaporating said liquid to provide a coating on at least one surface of said support, said coating comprising hydroexpansible polymer powder in an amount of 95 to 55% by weight, hydrosoluble binder in an amount of 5 to 23% by weight, and surfactant in an amount of 0 to 22% by weight.