ELECTRICALLY CONDUCTING GLASS STRANDS AND STRUCTURES COMPRISING SUCH STRANDS

摘要

The invention relates to glass strands and glass strand structures coated with an electrically conducting coating composition which comprises (as % by weight of solid matter):
6 to 50% of a film-forming agent, preferably 6 to 45%,5 to 40% of at least one compound chosen from plasticizing agents, surface-active agents and/or dispersing agents,20 to 75% of electrically conducting particles,0 to 10% of a doping agent,0 to 10% of a thickening agent,0 to 15% of additives.;The invention also relates to the electrically conducting coating composition used to coat the said strands and strand structures, to their process of manufacture and to the composite materials including these strands or strand structures.;Application to the preparation of structures and composite materials which can be heated by the Joule effect or which can be used for electromagnetic shielding.

主权项

1. A glass strand or glass strand structure coated with an electrically conducting coating composition which comprises (as % by weight of solid matter):
6 to 50% of a film-forming agent, wherein the film-forming agent is a polyvinylpyrrolidone, a poly(vinyl alcohol), a styrene polymer, a poly(vinyl chloride), a polyurethane or mixture thereof, 5 to 40% of at least one compound chosen from plasticizing agents, surface-active agents and/or dispersing agents, 44 to 75% of electrically conducting particles, 0 to 10% of a doping agent, 0 to 10% of a thickening agent, 0 to 15% of additives,wherein the electrically conducting particles consist of a mixture of (A) 2.5 to 45% by weight of solid matter of graphite particles having a size of from 10 to 100 μm, at least 5% by weight of the graphite particles are in the form of flakes or needles with an aspect ratio of greater than or equal to 5; (B) 0 to 45 by weight of solid matter of graphite particles having a size of less than 10 μm, and (C) 2.5 to 45% by weight of solid matter of carbon black particles having a size of less than 1 μm.