| 摘要 |
<p>1478332 Coated products MINNESOTA MINING & MFG CO 10 May 1974 [11 May 1973] 20870/74 Heading B2E [Also in Divisions B5, C3 and D1] Unidirectional ceramic fibre (refractory aluminium borosilicate) optionally having an epoxy resin size and aromatic polyamide fibre are coated with an isocyanate-containing polycarbodiimide prepolymer powder prepared from tolylene diisocyanate in the presence of 1-phenyl-3-methyl-2-phospholine-1-oxide as catalyst, either by dispensing the prepolymer powder from a hopper onto the hot fibre or by passing the fibre through a fluidized bed of the powder. The coated fibre is then cooled and wound onto a drum. Unidirectional glass fibres continuous strand rovings are similarly coated by the fluidized bed technique with the above prepolymer optionally containing inorganic titanate whiskers or a similar prepolymer prepared from tolylene diisocyanate and dipropylene glycol. On emerging from the heated zone the tacky powder coated fibres are brought together to form a rope.</p> |
