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| Silbond 40 |
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| SILBOND 40 is a concentrated form for obtaining usable silica. It is partially hydrolyzed mixture of monomers, dimers, trimers, higher polymers and cyclic polysilicates. Average -Si-O Si- chain length is about five. It is commonly used as an intermediate towards less concentrated, more highly hydrolyzed binders for a variety of end uses. Like Silbond Condensed, these binders are used for inorganic zinc rich coatings, investment casting molds, cores and ceramic shapes and coatings. Other Silbond Corporation bulletins describing basic chemistry and specific applications of ethyl silicate are available |
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Color : 30 APHA max.
Specific Gravity : 1.055 - 1.065 at 20'C (68'F)
Acidity : 0.001% max. (as HCl)
Alkalinity : 0.001% max. (as NH3)
Silica Content : 40.0% by wt. min. as SiO2
Low Boilers : 2.5% by wt. max. by GLC
Iron : 3 ppm max.
Form : Water-white liquid
Molecular Weight : 744 Average
Density : 8.83 lbs./gal. 68'F (20'C)
Boiling Point : Initial 172'F (78'C) at 1 atm.
Freezing Point : -130'F (-90'C)
Flash Point : 81'F (27.22'C) Tag Closed Cup
Viscosity : 5.2 cps. at 25'C (average)
Coefficient of Expansion : 0.00096 at 20'C a |
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