Water resistance of fine-vermiculite articles

Details Water resistance of fine-vermiculite articles Water resistance of fine-vermiculite articles

1989-04-13

1990-04-10

Stoll, Robert L.

Compositions

Exfoliated or intumesced

C04B 2006, C04B 3122, C04B 3126

Patent

active

049158716

ABSTRACT:
Certain articles required to function in air at temperatures of 250.degree. C. or higher comprise very fine particles of vermiculite from which the interstitial magnesium ions have been at least partially removed and which has been swollen in water. These articles are not ordinarily exposed to water when in use, but if they are they are likely to disintegrate quickly because of the ready dispersibility of the vermiculite particles. By the invention, water-resistance is given to such articles by treating them with a solution of an aluminate salt e.g. NaAlO.sub.2 or a zirconyl salt e.g. ZrOCl.sub.2.

REFERENCES:
patent: 1972390 (1934-09-01), Miner
patent: 4269628 (1981-05-01), Ballard et al.
patent: 4539046 (1985-09-01), McAloon et al.

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