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| Silbond HT-28A |
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| Prehydrolyzed ethyl silicate |
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| 78-104 |
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SILBOND HT-28A is a patented, prehydrolyzed ethyl silicate binder formulated for use as a vehicle in low Volatile Organic Compound (VOC) two-package inorganic zinc-rich primers. Being formulated with two different types of high purity inorganic silica binding species in a mixed dipropylene glycol methyl ether-ethyl alcohol and higher boiling ketone-type solvent system, SILBOND HT-28A has a relatively high nonvolatile solids content which is designed to meet primer VOC regulations 2.8 pounds per gallon (340 g./liter). Generally no further solvent additions to SILBOND HT-28A are required.
Applications for SILBOND HT-28A ethyl silicate binder are in-shop zinc priming, zinc coatings for shipbuildings, offshore drilling, bridges, industrial plants, and other areas where high quality corrosion resistance is needed. Technical Information Sheets describing the use of SILBOND HT-28A in zinc-rich primers are available from Silbond Corporation. |
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Color : Opaque Liquid
Specific Gravity : 1.030 - 1.050 at 20'C (68'F)
Acidity : 0.05% min by wt. (as H2S04)
Silica Content : 32.5 - 33.5 wt. %
Gel Time : 32-50 Seconds
Viscosity : 4-12 cs at 25'C (77'F)
Flash Point 66'F (19'C) : Tagliabue Closed Cup
Freezing Point : <-30'C (<-22'F)
Nonvolatile Solids : 42.5% by wt. (by forced ventilation oven) |
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