What does fumed silica do to epoxy


Hydrophobic fumed Silica hinders moisture integration into the epoxy binder system and, in so doing, eliminates one possible source of moisture that can have a negative effect during the curing process of an epoxy coating system—pigmented grout coat over troweled epoxy mortars. Fumed Silica is a light and easily blended thickening agent, ideal for preventing drainage and creating gels for use on vertical surfaces and as fillers. Note: Fumed Silica adds little structural strength to resin. Use Mill fiber, CSM or fiberglass when installing plugs, boxes, or stations. Precipitated Silica is larger in particle size than fumed Silica, which results in a higher specific surface area. A high specific surface area allows more particles to contact the surrounding environment. It then reacts or adsorbs onto another substance. Fumed Silica can also produce translucent or clear, non-yellowing rubber products with a minimal aging effect. Unidentified silica fume is more expensive because of its larger size and higher transportation costs. The main advantage of densified silica fume is to save on transportation costs. Some types of silica gel will "pop" when exposed to enough water. This is caused by the breakage of the silica spheres when contacting the water. If you immerse silica beads in water, they make a popping sound, and some break apart. Fumed Silica is a notoriously difficult powder to disperse due to its low density. The powder is so fine that it tends to float on top of liquid surfaces, so it can be very difficult to wet out, and processing often takes a long time. Silica, Amorphous (Fume), can irritate the eyes on contact. Repeated exposure can damage the eyes. * High exposure to Silica, Amorphous (Fume) can cause a flu-like illness with headache, fever, chills, aches, chest tightness, and cough. * Repeated exposure to Silica, Amorphous (Fume) can cause lung damage (fibrosis). If you are looking for high quality, high purity and cost-effective fumed silica, or if you require the latest price of fumed silica, please feel free to email contact mis-asia.

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