| 摘要 |
FIRE-RESISTANT REINFORCED PLASTIC MATERIAL AND ARTICLES AND METHODS FOR THEIR MANUFACTURE A high-solids, usable-viscosity lightweight, fire-resistive, reinforced structural material exhibiting low flame spread, good heat release and low smoke evolution when exposed to direct flame or to radiant heat and being resistant to embrittlement and cracking upon curing. A fire-resistive resin, comprising a cured reaction product of: a solvent-carried hydroxyl-group-providing, high-solids content component chosen from the group consisting of resorcinol and a mixture of resorcinol and phenol containing not over 2 mols phenol per mol resorcinol, and a solvent-carried first aldehyde component providing a percentage of substantially equivalent amount of aldehyde with respect to the hydroxyl groups available but less than mol ratio in the component, to provide a novolac resin. This novolac resin said parts (a) and (b) thereby being pre-mixed, to provide a novolac resin in solvent with a shelf life of about 6 months at a solids content of about 64% to 83% and at a viscosity of about 250 to 3500 cps. In addition, an organic, viscosity-reducing solvent for the novolac resin is added either separately or along with a second aldehyde solids source, for viscosity reduction to about 250 to 550 c.p.s., at 62% to 81% solids. The second aldehyde component is added at the time of use to bring the aldehyde percentage to 100% or more of the equivalent amount of total aldehyde to phenolic hydroxyl radicals. The aldehyde is present in the second aldehyde solids component in an amount of from 5% to 12% by weight of the the components. This mixture is then added to a fire resistive reinforcing fiberglass material and the solvent is removed at the time of cure.
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