| 摘要 |
A composition is described comprising a resin matrix reinforced with nonamphibole asbestos fiber or other inorganic fibers having similar aspect ratios, fiber diameters and hydrophilic surfaces, in a concentration of 5 to 85 phr, the fiber being coated with a glycol in a concentration of 3 to 75% by weight of fiber. The glycol will have the following properties: (a) liquid and stable up to and at the processing temperature of the resin; (b) liquid at temperatures of less than 50 DEG C. (122 DEG F.); (c) chemically unreactive with the resin; (d) low hygroscopicity; and (e) generally immiscible with the resin at ambient temperatures. Preferably the glycol will be ethylene glycol, propolyene glycol or a polyethylene glycol having a molecular weight not greater than 1500. An internal lubricant may also be used in the composition. Both thermosetting and thermoplastic resins may be used; good results have been obtained with polyvinyl, polyolefin and phenolic resins. The invention comprises the composition itself, the process for its formation, the coated asbestos fiber used for reinforcing the composition and shaped articles, such as pipe, made from the composition.
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