D - Textiles – Paper – 06 – M
Patent
D - Textiles, Paper
06
M
117/46.4
D06M 7/00 (1980.01) D21H 5/18 (1980.01)
Patent
CA 1168935
ABSTRACT OF THE DISCLOSURE The invention relates to a chrysotile asbestos fiber substantially coated on its exterior surface with hydrated titanium dioxide, the titanium dioxide content being from 0.5 to 35% by weight, part of the titanium dioxide being chemically bonded to the asbestos fiber and the remaining titanium dioxide being retained by electrostatic bond, said modified fiber having an Mg:Si ratio of from less than 3:2 to 2:2 when calculated on an atomic number ratio, a Ti:Si ratio of from more than 0:2 to less than 1:2 and said modified fiber being also characterized by an infrared spectrum wherein the rela- tive peaks at 1082, 1025 and 957 cm-1 have being sub- stantially altered in their intensity and as shown in curves C and D of Fig. 1, said fiber resisting leaching of the Mg ions by strong acids 3 to 6 times better than natural asbestos fibers and resisting leaching of SiO2 groups in strong alkali media 1.5 to 3 times better than unmodified chrysotile fibers. The novel titanated fibers are useful in the manufacture of diaphragm for sepa- rating the electrode compartments of electrolytic cells.
387746
Kimmerle Frank M.
Roberge Pierre
Goudreau Gage Dubuc
Societe Nationale de L'amiante
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