FIRE RESISTANT ADDITIVE FOR HARDENABLE RESIN COMPOSITIONS

摘要

A hardenable resin composition (or a component thereof) containing as a fire retardant ingredient particulate aluminium hydroxide wherein 10 to 30% by weight of the particles have a diameter less than 1 micron, 45 to 75% by weight of the particles have a diameter in the range from 38 to 150 microns and less than 20% by weight of the particles have a diameter in the range from 1 to 38 microns. The invention includes a preferred blend of aluminium hydroxide. By use of a bi-model distribution of the particle size of the aluminium hydroxide, sufficient quantity of additive is obtained without an excessive increase in compound viscosity.