Verfahren zur beschichtung von c-glasfasern zur erhoehung der chemischen bestaendigkeit und lagerfaehigkeit

Coating C-glass fibres with highly acidic silica contg. cations - for protection against water, increasing storage stability and suppressing corrosion

Abstract

In coating C-glass fibres, a coating material (I) like SiO2 is used, which has cationic character and a high acidity. - (I) is a cationic SiO2 sol with pH 2.5-5.5, pref. 3.5-4.5. Treatment with Al hydroxychloride is used to provide the cations and adjust the pH. Alternatively, the pH is adjusted to the required range by adding acid or alkali, pref. acetic acid. The (I) soln. contains 0.1-5.0, pref. 0.5-1.5 (wt.)% solids.

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    DE-3725506-A1February 09, 1989Frenzelit Werke Gmbh & Co KgThermisch stabilisierte fasern aus kieselsaeureglaesern

NO-Patent Citations (1)

    Title
    ULLMANN: Encyklopädie der technischen Chemie, 4. Aufl. Bd. 11, S. 361-363

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