Silicone diffusion pump fluids

Details Silicone diffusion pump fluids Silicone diffusion pump fluids

1978-04-21

1981-09-15

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556455, 252 783, C07F 708

Patent

active

042898919

ABSTRACT:
The present invention relates to a variety of silicone diffusion pump fluids which are inexpensive to produce. An example of a preferred diffusion pump fluid of the present case is one of the formula, ##STR1## where .phi. is phenyl and such that the fluid boils at 245.degree. C. at 1.5 mm. of Hg pressure. The present invention also has within its scope a process for producing such silicone diffusion pump fluids by hydrolyzing the appropriate chlorosilanes by a reverse hydrolysis procedure, that is, adding the appropriate amount of water to the mixture of chlorosilanes.

REFERENCES:
patent: 2410346 (1946-10-01), Hyde
patent: 2530356 (1950-11-01), Hunter
patent: 2611774 (1952-09-01), Tyler
patent: 2890234 (1959-06-01), Fletcher et al.
patent: 3012052 (1961-12-01), Simmler
patent: 3389159 (1968-06-01), Nielsen
patent: 3523131 (1970-08-01), Sliwinski
patent: 4113760 (1978-09-01), Frey et al.
Noll, "Chemistry & Technology of Silicones", 2nd ed., Academic Press, N.Y. (1968), pp. 461-463 and 630.
Noll, "Chemistry and Technology of Silicones", 2nd ed., Academic Press, N.Y. (1968), pp. 190-198.

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