Composition for waterproofing silica-ceramic insulation bodies
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United States of America Patent
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Mar 21, 1989
Issued Date -
N/A
app pub date -
Dec 22, 1986
filing date -
May 8, 1985
priority date (Note) -
Expired
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Abstract
There is provided a method and compositions for improving the resistance to absorption of water by a porous rigid sintered and pressed block of short staple amorphous silica fiber by distributing within the pores of said block an alkylalkoxysilane or a fluoroalkylalkoxysilane which is substantially free of deleterious halide. Halide may be reduced by special purification techniques or by netralization in situ with acid scavanger.
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