Patent ID: 6458436
Filing Date: 2002-10-01
Classification: C03C,Y10T

Abstract:
A process for the production of composite man-made vitreous fibres comprising providing fibres formed from mineral melt and having the following composition, expressed by weight of oxide:SiO235-66â€‚Al2O30-12MgO0-30CaO10-45â€‚FeO (total iron)0-15Na2O + K2O0-10P2O50-10B2O50-10TiO20-10Others0-10the fibres having a solubility of at least 20 nm/day in Gamble's solution at pH 7.5 and 37Â° C., providing a coating composition which comprises a salt which is a phosphate or hydrogen phosphate of ammonium, quaternary ammonium or alkali metal, and in which the amount of salt in the coating composition is not more than 0.2 wt. %, and coating this coating composition onto the fibres in an amount such that the salt is present on the fibres in an amount of at least 0.3% based on the weight of fibres.