Low-density molding compound containing surface derivatized microspheres
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United States of America Patent
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Jan 16, 2018
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app pub date -
Jun 26, 2015
filing date -
Jun 27, 2014
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Abstract
A molded article is provided that includes a resin matrix having a surface, the resin matrix formed from cross-linked polyester resin or vinyl-ester resin. Microspheroids having a mean diameter of from 16 to 45 microns are embedded in the resin matrix. The microspheroids having a specific gravity of between 0.19 and 0.6 and an isotactic crush strength of greater than or equal to 2750 kilopascals (kPa). Surface activating agent alkoxysilane molecules are covalently bonded to each of the microspheroids. Filler particles are also present in the resin matrix. Fibers are also present in the resin matrix. The fibers being natural fibers, glass fibers, carbon fibers, or a combination thereof. The article has a specific gravity of between 0.80 and 1.25.
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