公开(公告)号：US20030178220A1

公开(公告)日：2003-09-25

申请号：US10391595

申请日：2003-03-20

Applicant: ALCATEL

Inventor： Sylvie Barusseau ,  Francoise Ducatel ,  Aziza Gouchi

IPC: H01B007/00

CPC classification number: C08K9/02

Abstract: The present invention relates to a sheath (7) for a cable (1), the sheath comprising, at least in part, a halogen-free intumescent composition, said sheath being characterized in that said composition contains a mixture of: a polymer matrix chosen from a polyethylene, a polypropylene, an ethylene copolymer, a propylene copolymer, a silicone, a polyamide, and a mixture thereof; and at least one flame-retardant additive constituted by a first inorganic compound having a lamellar crystal structure, and by a second inorganic compound inserted between the lamellae of said first compound, said second compound being capable of causing said lamellae to move apart under the effect of heat. This sheath is for use as a flame retardant in telecommunications cables.

Abstract translation: 本发明涉及一种用于电缆（1）的护套（7），所述护套至少部分地包括无卤膨胀性组合物，所述护套的特征在于所述组合物包含以下混合物：所选择的聚合物基质 聚乙烯，聚丙烯，乙烯共聚物，丙烯共聚物，硅氧烷，聚酰胺及其混合物; 以及由具有层状结晶结构的第一无机化合物构成的至少一种阻燃添加剂，以及插入在所述第一化合物的薄片之间的第二无机化合物，所述第二化合物能够使所述薄片在所述效果下分离 的热量。 该护套用作电信电缆中的阻燃剂。